Commit Graph

664 Commits

Author SHA1 Message Date
Moritz Fischer
12e8d58415 i2c: mux: Allow muxes to work as children of i2c bus without i2c-parent
For mux check if the parent is already a device of UCLASS_I2C and if yes
just use that. Otherwise see if someone specified an i2c-parent phandle.
This mimics the behavior found in the Kernel, as it removes the
requirement to explicitly specify a i2c-parent phandle.

Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: u-boot@lists.denx.de
2017-01-18 06:37:57 +01:00
Jaehoon Chung
1d61ad959e i2c: Kconfig: Add SYS_I2C_S3C24X0 entry
Adding Kconfig for SYS_I2C_S3C24X0.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2017-01-18 13:25:56 +09:00
Jaehoon Chung
a298712e94 i2c: s3c24x0: fix the compiler error for exynos4
If CONFIG_SYS_I2C_S3C24X0_SLAVE isn't defined, then complie error should
be occurred.
This patch is for preventing it.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2017-01-18 13:25:56 +09:00
Moritz Fischer
50994ab757 i2c: cdns: Add additional compatible string for r1p14 of the IP.
Adding additional compatible string for version 1.4 of the IP block.

Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Heiko Schocher <hs@denx.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2017-01-10 10:18:12 +01:00
Tom Rini
2346511961 Merge branch 'master' of git://git.denx.de/u-boot-i2c 2016-12-20 08:41:54 -05:00
Bradley Bolen
77466267eb i2c: mv_i2c.c: Correct address endianness
0c0f719ad2 accidentally changed the
endianness of the i2c read and write addresses.  This was noticable when
accessing EEPROMs that use 2 byte addressing as the LSB was being sent
first.

Signed-off-by: Bradley Bolen <bradleybolen@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-12-19 09:32:00 +01:00
Jagan Teki
2da24fe551 i2c: mxc: Make 'no gpio pinctrl state' print as debug
Some I2C bus devicetree nodes, doesn't require to have
gpio pinctrl so replace the dev_info to debug so the
print never comes on the console and for bus that uses
gpio pinctrl anyway have dev_err.

Before:
------
U-Boot> i2c dev 1
Setting bus to 1
i2c bus 1 at 0x21a4000, no gpio pinctrl state.

After:
------
U-Boot> i2c dev 1
Setting bus to 1

Cc: Simon Glass <sjg@chromium.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Heiko Schocher <hs@denx.de>
2016-12-16 17:15:27 +01:00
Jagan Teki
65c92e4f39 i2c: mxc: Print hex instead of decimal for bus address
Better to print the hex value for bus address instead of
decimal, for more readbility on bus addressing.

Before:
------
U-Boot> i2c dev 1
Setting bus to 1
i2c bus 1 at 35274752, no gpio pinctrl state.

After:
------
U-Boot> i2c dev 1
Setting bus to 1
i2c bus 1 at 0x21a4000, no gpio pinctrl state.

Cc: Simon Glass <sjg@chromium.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Heiko Schocher <hs@denx.de>
2016-12-16 17:15:27 +01:00
Jagan Teki
72c8c10b73 i2c: Kconfig: Add SYS_I2C_MXC entry
Added kconfig for SYS_I2C_MXC driver.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
2016-12-16 17:15:27 +01:00
Simon Glass
2852709676 dm: i2c: Add a note to I2C drivers which need conversion
Maintainers need to be notified more directly of the need to convert these
drivers. Add a note to the top each affected file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2016-12-05 13:28:03 +01:00
Simon Glass
37b8eb37f8 samsung: i2c: Split the high-speed I2C code into a new driver
Now that driver model is used for I2C on all boards, we can split the
high-speed code into its own driver. There is virtually no common code,
and this significantly reduces confusion.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2016-12-05 13:27:54 +01:00
Simon Glass
9a1bff69cd samsung: i2c: Drop old code from I2C driver
Now that all boards use DM_I2C we can drop the old code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2016-12-05 13:27:41 +01:00
Jagan Teki
aec9a0f19f sunxi: Rename CONFIG_SUNXI to CONFIG_ARCH_SUNXI
CONFIG_SUNXI -> CONFIG_ARCH_SUNXI
and removed CONFIG_SUNIX from config_whitelist.txt

Cc: Simon Glass <sjg@chromium.org>
Cc: Ian Campbell <ijc@hellion.org.uk>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2016-10-30 11:38:04 +01:00
Tom Rini
1df182ddf7 Merge branch 'master' of git://git.denx.de/u-boot-atmel 2016-10-28 14:14:18 -04:00
Wenyou Yang
52f37333bc i2c: at91_i2c: Change error return -ENODEV to -EINVAL
Change the error return value -ENODEV from to -EINVAL for more
reasonable.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2016-10-28 18:37:14 +02:00
Wenyou Yang
2ccc07bbdc i2c: at91_i2c: Remove unnecessary clock calling
Due to the peripheral clock driver improvement, remove the
unnecessary clock calling.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2016-10-28 18:37:14 +02:00
Marek Vasut
b03380805b i2c: designware: Avoid overwriting the cmd_data register
Make sure the driver writes the cmd_data register only once per
read transfer instead of doing so potentially repeatedly.

In case the read transfer didn't finish quickly enough, the loop
in the driver code would spin fast enough to write the same value
into the cmd_data register again before re-checking whether the
transfer completed, which would cause another spurious read transfer
on the bus.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Chin Liang See <clsee@altera.com>
2016-10-24 18:15:47 +02:00
Simon Glass
b02e4044ff libfdt: Bring in upstream stringlist functions
These have now landed upstream. The naming is different and in one case the
function signature has changed. Update the code to match.

This applies the following upstream commits by
Thierry Reding <treding@nvidia.com> :

   604e61e fdt: Add functions to retrieve strings
   8702bd1 fdt: Add a function to get the index of a string
   2218387 fdt: Add a function to count strings

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-10-13 13:54:10 -06:00
Simon Glass
fac3e796b9 x86: i2c: Fix cast of address to 32-bit value
This gives a build warning on 64-bit x86. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-10-11 11:55:33 +08:00
Moritz Fischer
6d1a718fdf cros_ec: Honor the google,remote-bus dt property
Boards where ECs that use a I2C port != 0 specify this in the
devicetree file via the google,remote-bus property.
Previously this was ignored and hardcoded to port 0.

Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: u-boot@lists.denx.de
Acked-by: Simon Glass <sjg@chromium.org>
2016-10-08 09:33:36 -04:00
Stephen Warren
fc607d9ab9 i2c: tegra: only use new clock/reset APIs
Now that the standard clock/reset APIs are available for all Tegra SoCs,
convert the I2C driver to use them exclusively, and remove any references
to the custom Tegra-specific APIs.

Cc: Heiko Schocher <hs@denx.de>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-09-27 09:11:03 -07:00
Stefan Roese
87de0eb31c i2c: mvtwsi.c: Add support for Marvell Armada 7K/8K
By adding the "marvell,mv78230-i2c" compatible property, we can enable
this I2C driver to support these new ARM64 chips as well.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Neta Zur Hershkovits <neta@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Omri Itach <omrii@marvell.com>
Cc: Igal Liberman <igall@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Heiko Schocher <hs@denx.de>
2016-09-26 10:43:10 +02:00
jinghua
85f03f0ea8 i2c: mv_i2c.c: Validate read length in I2C command
The I2C bus will get stuck when reading 0 byte. So we add validation of
the read length in i2c_read(). This issue only occurs on read operation.

Signed-off-by: jinghua <jinghua@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Heiko Schocher <hs@denx.de>
2016-09-26 10:42:56 +02:00
Stefan Roese
9ad5a00712 i2c: mv_i2c.c: Enable runtime speed selection (standard vs fast mode)
This patch adds runtime speed configuration to the mv_i2c driver.
Currently standard (max 100kHz) and fast mode (max 400kHz) are
supported.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Heiko Schocher <hs@denx.de>
2016-09-26 10:42:37 +02:00
Stefan Roese
0c0f719ad2 i2c: mv_i2c.c: Add DM support
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Heiko Schocher <hs@denx.de>
2016-09-26 10:41:59 +02:00
Stefan Roese
7b46ee521e i2c: mv_i2c.c: Prepare driver for DM conversion
To prepare for the DM conversion, we add a layer of compatibility
functions to be used by both the legacy and the DM functions.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Heiko Schocher <hs@denx.de>
2016-09-26 10:41:17 +02:00
Stefan Roese
340fcd66cc i2c: mv_i2c.c: Remove CONFIG_HARD_I2C
CONFIG_HARD_I2C is not needed, lets remove it.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Heiko Schocher <hs@denx.de>
2016-09-26 10:41:03 +02:00
Stefan Roese
8eff909a56 i2c: mv_i2c.c: cosmetic: Coding style cleanups
Some mostly indentation coding style cleanups. Also, move this driver
to use debug() for debug output.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Heiko Schocher <hs@denx.de>
2016-09-26 10:40:41 +02:00
Masahiro Yamada
1221ce459d treewide: replace #include <asm/errno.h> with <linux/errno.h>
Now, arch/${ARCH}/include/asm/errno.h and include/linux/errno.h have
the same content.  (both just wrap <asm-generic/errno.h>)

Replace all include directives for <asm/errno.h> with <linux/errno.h>.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
[trini: Fixup include/clk.]
Signed-off-by: Tom Rini <trini@konsulko.com>
2016-09-23 17:55:42 -04:00
Wenyou Yang
76062b9cdb i2c: at91_i2c: Fix the wrong include file
Since the 'clk_client.h' doesn't exist, it should be 'clk.h'.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-09-13 06:58:54 +02:00
John Keeping
21d4b7d4e1 rockchip: i2c: fix >32 byte writes
The special handling of the chip address and register address must only
happen before we send the data buffer, otherwise we will end up
inserting both of these every 32 bytes.

Signed-off-by: John Keeping <john@metanate.com>
Acked-by: Simon Glass <sjg@chromium.org>
2016-09-13 06:57:27 +02:00
John Keeping
551288bd8b rockchip: i2c: move register write out of inner loop
There is no point in writing intermediate values to the txdata
registers.

Also add padding to the debug logging to make it easier to read when
there are leading zeroes.

Signed-off-by: John Keeping <john@metanate.com>
Acked-by: Simon Glass <sjg@chromium.org>
2016-09-13 06:57:16 +02:00
John Keeping
80333fd85c rockchip: i2c: use named constant when appropriate
Make it clear that we are using the same value in two adjacent lines.

Signed-off-by: John Keeping <john@metanate.com>
Acked-by: Simon Glass <sjg@chromium.org>
2016-09-13 06:57:05 +02:00
Tom Rini
da968c7bfa Merge branch 'master' of git://git.denx.de/u-boot-i2c 2016-08-26 07:42:06 -04:00
Stefan Roese
03d6cd972e i2c: mvtwsi: Fix order of address bytes (high to low)
Patch f8a10ed1 [i2c: mvtwsi: Make address length variable] accidentally
inverted the sequence of address bytes sent to the I2C device. This
patch corrects this by sending the highest byte first and the lowest
byte last again.

Tested on theadorable Armada-XP board.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Mario Six <mario.six@gdsys.cc>
Cc: Heiko Schocher <hs@denx.de>
2016-08-26 07:02:49 +02:00
Stephen Warren
6002c75c59 ARM: tegra: remove stale nvidia, bpmp I2C DT property
The nvidia,bpmp property is left over from an old BPMP I2C binding, and
shouldn't be present. Remove it from the SoC DT file, and update the
I2C driver not to parse it; the value wasn't used for anything any more
anyway.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-08-25 13:48:11 -07:00
Stephen Warren
b4ee081e5a ARM: tegra: fix Tegra186 I2C clock name
The Tegra I2C binding dictates that the clock name for the Tegra I2C clock
be "div-clk" not "i2c". Fix the Tegra186 DT and I2C driver to honor this.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-08-25 13:47:49 -07:00
Stefan Roese
ca6c5e03f1 i2c: intel_i2c: SMBus driver PCI addition (e.g. BayTrail)
This patch adds support for the SMBus block read/write functionality.
Other protocols like the SMBus quick command need to get added
if this is needed.

This patch also removed the SMBus related defines from the Ivybridge
pch.h header. As they are integrated in this driver and should be
used from here. This change is added in this patch to avoid compile
breakage to keep the source git bisectable.

Tested on a congatec BayTrail board to configure the SMSC2513 USB
hub.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: George McCollister <george.mccollister@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-08-16 11:44:09 +08:00
Tom Rini
0fcb9f07a1 Merge branch 'master' of git://git.denx.de/u-boot-atmel 2016-08-15 17:31:23 -04:00
Songjun Wu
8800e0fa20 i2c: atmel: add i2c driver
Add i2c driver.

Signed-off-by: Songjun Wu <songjun.wu@atmel.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
2016-08-15 22:12:00 +02:00
Bryan Wu
3c27fa2193 i2c: tegra: add standardized clk/reset API support
clk/reset API was tested on T186 platform and previous chip like
T210/T124 will still use the old APIs.

Signed-off-by: Bryan Wu <pengw@nvidia.com>
(swarren, simplified some ifdefs, removed indent level inside an ifdef)
(swarren, added comment about the ifdefs)
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-08-15 10:26:13 -07:00
Stephen Warren
34f1c9fe14 i2c: add Tegra186 BPMP driver
On Tegra186, some I2C controllers are directly controlled by the main CPU,
whereas others are controlled by the BPMP, and can only be accessed by the
main CPU via IPC requests to the BPMP. This driver covers the latter case.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-08-15 10:26:13 -07:00
Tom Rini
f4b0df1823 Merge git://git.denx.de/u-boot-dm 2016-08-12 16:00:50 -04:00
Stephen Warren
6e06acb732 fdt: allow fdtdec_get_addr_size_*() to translate addresses
Some code may want to read reg values from DT, but from nodes that aren't
associated with DM devices, so using dev_get_addr_index() isn't
appropriate. In this case, fdtdec_get_addr_size_*() are the functions to
use. However, "translation" (via the chain of ranges properties in parent
nodes) may still be desirable. Add a function parameter to request that,
and implement it. Update all call sites to default to the original
behaviour.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Squashed in build fix from Stephen:
Signed-off-by: Simon Glass <sjg@chromium.org>
2016-08-12 09:20:27 -06:00
Simon Glass
2651a052d8 i2c: Drop redundant platform data setting in drivers
The i2c uclass has a default setting for per_child_platdata_auto_alloc_size
so drivers do not need to set it. Remove this from drivers to avoid
confusion.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-08-12 06:41:41 +02:00
Vignesh R
95def3cf5d i2c: i2c-uclass-compat: avoid any BSS usage
As I2C can be used before DRAM initialization for reading EEPROM,
avoid using static variables stored in BSS, since BSS is in DRAM, which
may not have been initialised yet. Explicitly mark "static global"
variables as belonging to the .data section.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Heiko Schocher<hs@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-08-08 13:33:00 -04:00
Simon Glass
911954859d dm: Use dm_scan_fdt_dev() directly where possible
Quite a few places have a bind() method which just calls dm_scan_fdt_dev().
We may as well call dm_scan_fdt_dev() directly. Update the code to do this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-27 14:15:54 -06:00
Simon Glass
2e3f1ff63f dm: Convert users from dm_scan_fdt_node() to dm_scan_fdt_dev()
This new function is more convenient for callers, and handles pre-relocation
situations automatically.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-27 14:15:07 -06:00
Tom Rini
9c7a0a600b Merge git://git.denx.de/u-boot-fsl-qoriq 2016-07-26 17:34:28 -04:00
mario.six@gdsys.cc
27059c3e4d i2c: fsl: Fix driver initialization
Due to a oversight in testing, the initialization of the recently
introduced Freescale I2C DM driver works only for 36 bit mode of e.g.
the MPC85XX SoCs (specifically, if the physical addresses are 64 bit
wide and the DT addresses 32 bit wide).

This patch corrects the initialization so that it will work in a more
general setting.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: York Sun <york.sun@nxp.com>
2016-07-26 09:00:44 -07:00
mario.six@gdsys.cc
6e677caf8c i2c: mvtwsi: Add documentation
Add full documentation to all driver functions.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:20:38 +02:00
mario.six@gdsys.cc
c68c624320 i2c: mvtwsi: Make delay times frequency-dependent
Some devices using the MVTWSI driver have the option to run at speeds
faster than Standard Mode (100kHZ). On the Armada 38x controllers, this
is actually necessary, since due to erratum FE-8471889, a timing
violation concerning repeated starts prevents the controller from
working correctly in Standard Mode. One of the workarounds recommended
in the erratum is to set the bus to Fast Mode (400kHZ) operation and
ensure all connected devices are set to Fast Mode.

In the current version of the driver, however, the delay times are
hard-coded to 10ms, corresponding to Standard Mode operation. To take
full advantage of the faster modes, we would need to either keep the
currently configured I2C speed in a globally accessible variable, or
pass it to the necessary functions as a parameter. For DM, the first
option is not a problem, and we can simply keep the speed in the private
data of the driver. For the legacy interface, however, we would need to
introduce a static variable, which would cause problems with boots from
NOR flashes; see commit d6b7757 "i2c: mvtwsi: Eliminate
twsi_control_flags."

As to not clutter the interface with yet another parameter, we therefore
keep the default 10ms delays for the legacy functions.

In DM mode, we make the delay time dependant on the frequency to allow
taking full advantage of faster modes of operation (tested with up to
1MHZ frequency on Armada MV88F6820).

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:20:28 +02:00
mario.six@gdsys.cc
24f9c6bbc7 i2c: mvtwsi: Handle zero-length offsets properly
Zero-length offsets are not properly handled by the driver. When a read
operation with a zero-length offset is started, a START condition is
asserted, and since no offset bytes are transferred, a repeated START is
issued immediately after, which confuses the controller.

To fix this, we send the first START only if any address bytes need to
be sent, and keep track of the expected start status accordingly.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:20:19 +02:00
mario.six@gdsys.cc
14a6ff2c4f i2c: mvtwsi: Add compatibility to DM
This patch adds the necessary functions and Kconfig entry to make the
MVTWSI I2C driver compatible with the driver model.

A possible device tree entry might look like this:

i2c@11100 {
	compatible = "marvell,mv64xxx-i2c";
	reg = <0x11000 0x20>;
	clock-frequency = <100000>;
	u-boot,i2c-slave-addr = <0x0>;
};

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:20:13 +02:00
mario.six@gdsys.cc
f8a10ed1fd i2c: mvtwsi: Make address length variable
The length of the address parameter of the __twsi_i2c_read and
__twsi_i2c_write functions is fixed to four bytes.

As a final step in the preparation of the DM conversion, we make the
length of this parameter variable by turning it into an array of bytes,
and convert the 32 bit value that's passed to the legacy functions into
a four-byte-array on the fly.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:20:05 +02:00
mario.six@gdsys.cc
3c4db636ac i2c: mvtwsi: Factor out adap parameter
To be able to use the compatibility layer from the DM functions, we
factor the adap parameter out of all functions, and pass the actual
register base instead.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:19:56 +02:00
mario.six@gdsys.cc
61bc02b260 i2c: mvtwsi: Add compatibility functions
To prepare for the DM conversion, we add a layer of compatibility
functions to be used by both the legacy and the DM functions.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:19:49 +02:00
mario.six@gdsys.cc
e075828128 i2c: mvtwsi: Use 'uint' instead of 'unsigned int'
Since some additional parameters will be added in the course of this
patch series (especially with the addition of DM support), we replace
the longer "unsigned int" declarations with "uint" declarations to keep
the parameter lists more readable.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:19:42 +02:00
mario.six@gdsys.cc
059fce9f61 i2c: mvtwsi: Get rid of status parameter
The twsi_stop function contains a parameter "status," which is used to
pass in the current exit status of the function calling twsi_stop, and
either return this status unchanged if it indicates an error, or return
twsi_stop's exit status if it does not indicate an error.

While not massively complicated, this adds another purpose to the
twsi_stop function, which should have the sole purpose of asserting a
STOP condition on the bus (and not manage the exit status of its
caller).

Therefore, we move the exit status management into the caller functions
by introducing a "stop_status" variable and returning either the status
before the twsi_stop call (kept in the "status" variable), or the status
from the twsi_stop call, depending on which indicates an error.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:19:35 +02:00
mario.six@gdsys.cc
670514f524 i2c: mvtwsi: Eliminate flags parameter
Due to breaking boots from NOR flashes, commit d6b7757 ("i2c: mvtwsi:
Eliminate twsi_control_flags") removed the static global
twsi_control_flags variable, which kept a set of default flags that were
always or'd to the control register when writing. It was replaced with a
flags parameter, which was passed around between the functions that
needed it.

Since the twsi_control_flags variable was used just for the purposes of
a) setting the MVTWSI_CONTROL_TWSIEN on every control register write,
   and
b) setting the MVTWSI_CONTROL_ACK from twsi_i2c_read if needed,
anyway, the added overhead of another variable being passed around is no
longer justified, and we are better off implementing this flag setting
logic locally in the functions that actually write to the control
register.

Therefore, this patch sets MVTWSI_CONTROL_TWSIEN on every control
register write, replaces the twsi_i2c_read's flags parameter with a
ack_flag parameter, which tells the function whether to acknowledge the
read or not, and removes every other instance of the flags variable.
This has the added benefit that now every notion of "global default
flags" is gone, and it's much easier to see which control flags are
actually set at which point in time.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:19:29 +02:00
mario.six@gdsys.cc
49c801bf35 i2c: mvtwsi: Improve and fix comments
This patch fixes only comments/documentation: Streamline capitalization
and improve grammar/punctuation.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:19:23 +02:00
mario.six@gdsys.cc
dfc3958cd3 i2c: mvtwsi: Streamline code and add documentation
Convert groups of logically connected preprocessor defines into proper
enums, one macro into an inline function, and add documentation
to/extend existing documentation of these items.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:19:16 +02:00
mario.six@gdsys.cc
9ec43b0c3f i2c: mvtwsi: Fix style violations
This patch fixes seven style violations: Six superfluous spaces after
casts, and one logical continuation violation.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-26 10:19:06 +02:00
Mugunthan V N
daa69ffe3d drivers: i2c: omap24xx_i2c: adopt omap_i2c driver to driver model
Convert omap i2c driver to adopt i2c driver model

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-07-26 08:40:09 +02:00
Mugunthan V N
be243e4113 drivers: i2c: omap24xx_i2c: prepare driver for DM conversion
Prepare the driver for DM conversion.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-07-26 08:39:57 +02:00
Mugunthan V N
5142ac7916 drivers: i2c: uclass: parse dt parameters only when CONFIG_OF_CONTROL is enable
parse dt parameter of i2c devices only when CONFIG_OF_CONTROL
is enabled.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-07-26 08:39:35 +02:00
Masahiro Yamada
4e3d84066e ARM: uniphier: use (devm_)ioremap() instead of map_sysmem()
This does not have much impact on behavior, but makes code look more
more like Linux.  The use of devm_ioremap() often helps to delete
.remove callbacks entirely.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-07-24 00:13:10 +09:00
Stephen Warren
135aa95002 clk: convert API to match reset/mailbox style
The following changes are made to the clock API:
* The concept of "clocks" and "peripheral clocks" are unified; each clock
  provider now implements a single set of clocks. This provides a simpler
  conceptual interface to clients, and better aligns with device tree
  clock bindings.
* Clocks are now identified with a single "struct clk", rather than
  requiring clients to store the clock provider device and clock identity
  values separately. For simple clock consumers, this isolates clients
  from internal details of the clock API.
* clk.h is split so it only contains the client/consumer API, whereas
  clk-uclass.h contains the provider API. This aligns with the recently
  added reset and mailbox APIs.
* clk_ops .of_xlate(), .request(), and .free() are added so providers
  can customize these operations if needed. This also aligns with the
  recently added reset and mailbox APIs.
* clk_disable() is added.
* All users of the current clock APIs are updated.
* Sandbox clock tests are updated to exercise clock lookup via DT, and
  clock enable/disable.
* rkclk_get_clk() is removed and replaced with standard APIs.

Buildman shows no clock-related errors for any board for which buildman
can download a toolchain.

test/py passes for sandbox (which invokes the dm clk test amongst
others).

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
2016-06-19 17:05:55 -06:00
Yuan Yao
9d10c2d3fe drivers: i2c: mxc: Add early init
Add early i2c init function with conservative divider when the exact
clock rate is not available.

Signed-off-by: Yuan Yao <yao.yuan@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
2016-06-10 13:44:58 -07:00
Chris Packham
d6b7757e41 i2c: mvtwsi: Eliminate twsi_control_flags
In a system where the initial u-boot location is genuinely NOR flash (as
opposed to RAM or a cache-line setup by a pre-bootloader) writes to the
data section are problematic. At best these writes have no effect, at
worst they put the flash memory into a status mode which changes the
executable code underneath us.

Pass around a stack variable from the top of the twsi i2c driver to
avoid writing to global data.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
2016-05-17 08:32:02 +02:00
Stefan Roese
3a3705280d i2c: Select SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED for SPEAr
The DW I2C controller in the SPEAr SoCs doesn't support the enable
status register check. This patch selects
SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED for these boards.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
2016-05-17 08:29:00 +02:00
Stefan Roese
e32d0db798 i2c: Add entry for Designware I2C driver in Kconfig
This patch adds an entry for the Designware I2C driver in Kconfig.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-05-17 08:28:56 +02:00
mario.six@gdsys.cc
dbc82ce31b dm: fsl_i2c: Enable DM for FSL I2C
Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-05-17 08:28:55 +02:00
mario.six@gdsys.cc
ecf591e303 dm: fsl_i2c: Factor out adap parameter
Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-05-17 08:28:55 +02:00
mario.six@gdsys.cc
ad7e657cec dm: fsl_i2c: Prepare compatibility functions
Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-05-17 08:28:54 +02:00
mario.six@gdsys.cc
00b61553f1 dm: fsl_i2c: Rename methods for reading/writing data
Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-05-17 08:28:54 +02:00
mario.six@gdsys.cc
16579ecbcc dm: fsl_i2c: Rename probe method
Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-05-17 08:28:53 +02:00
mario.six@gdsys.cc
03a112aad6 dm: fsl_i2c: Remove unnecessary variable
Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-05-17 08:28:53 +02:00
mario.six@gdsys.cc
386b276918 dm: fsl_i2c: Reword and clarify comment
Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-05-17 08:28:52 +02:00
mario.six@gdsys.cc
2b21e96034 dm: fsl_i2c: Use clearer parameter names
Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-05-17 08:28:52 +02:00
mario.six@gdsys.cc
ec2c81c5d4 dm: fsl_i2c: Rename I2C register structure
Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-05-17 08:28:52 +02:00
Stefan Roese
b6a77b0ce8 i2c: designware_i2c: Optionally check enable status register
Some platforms don't implement the enable status register at offset 0x9c.
The SPEAr600 platform is one of them. The recently added check to this
status register can't be performend on these platforms.

This patch introduces a new config option that can be enabled on such
platforms not supporting this register.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>
2016-05-17 08:28:50 +02:00
Michal Simek
d79ac32478 i2c: muxes: Add support for TI PCA954X mux
Add support for common TI i2c mux which is available on ZynqMP zcu102
board.
DM i2c mux core code is selecting/deselecting bus before/after
every command is performed that's why only one channel is active at a
time. That's also the reason why deselect is just disable all available
channels.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-17 08:28:50 +02:00
Michal Simek
ad72e7622b i2c: cdns: Support different bus speeds
400kHz is maximum freq which can be used on Xilinx ZynqMP.
Support it with standard divider calculator.
Input freq is hardcoded to 100MHz input freq till we have clock driver
which can provide this information for exact configuration.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2016-05-17 08:28:49 +02:00
Michal Simek
6150be9094 i2c: cdns: Moving speed setup from probe to set_bus_speed function
set_bus_speed is the right function where bus speed should be setup.
This move enable option to remove probe and remove functions which are
empty.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2016-05-17 08:28:48 +02:00
Michal Simek
a13767bc0e i2c: cdns: Read address from DT in ofdata_to_platdata
Extract reading IP base address in function which is designed for it.
Also enable option to read more information from DT in this function.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2016-05-17 08:28:48 +02:00
Vagrant Cascadian
eae4b2b67b Fix spelling of "occurred".
Signed-off-by: Vagrant Cascadian <vagrant@debian.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-02 18:37:09 -04:00
Stefan Roese
ba5da550ae i2c: designware_i2c: Add support for PCI(e) based I2C cores (x86)
This patch adds support for the PCI(e) based I2C cores. Which can be
found for example on the Intel Bay Trail SoC. It has 7 I2C controllers
implemented as PCI devices.

This patch also adds the fixed values for the timing registers for
BayTrail which are taken from the Linux designware I2C driver.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-04-25 07:31:58 +02:00
Stefan Roese
334b9b004c i2c: designware_i2c: Add DM support
This patch adds DM support to the designware I2C driver. It currently
supports DM and the legacy I2C support. The legacy support should be
removed, once all platforms using it have DM enabled.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Heiko Schocher <hs@denx.de>
2016-04-25 07:31:48 +02:00
Stefan Roese
3f4358da8d i2c: designware_i2c: Prepare for DM driver conversion
This patch prepares the designware I2C driver for the DM conversion.
This is mainly done by removing struct i2c_adapter from the functions
that shall be used by the DM driver version as well.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Heiko Schocher <hs@denx.de>
2016-04-25 07:31:38 +02:00
Stefan Roese
11b544ab41 i2c: designware_i2c: Integrate set_speed() into dw_i2c_set_bus_speed()
Integrating set_speed() into dw_i2c_set_bus_speed() will make the
conversion to DM easier for this driver.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Heiko Schocher <hs@denx.de>
2016-04-25 07:31:28 +02:00
Stefan Roese
1c8b089b45 i2c: designware_i2c: Add dw_i2c_enable() helper function
dw_i2c_enable() is used to dis-/en-able the I2C controller. It makes
sense to add such a function, as the controller is dis-/en-abled
multiple times in the code. Additionally, this function now checks,
if the controller is really dis-/en-abled. This code is copied
from the Linux I2C driver version.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-04-25 07:31:16 +02:00
Stefan Roese
e209828cbd i2c: designware_i2c: Add ic_enable_status to ic_regs struct
Add the ic_enable_status register to the i2c_regs struct. Additionally
the register offsets are added, to better check, if the offset matches
the register description in the datasheet.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Heiko Schocher <hs@denx.de>
2016-04-25 07:31:04 +02:00
Moritz Fischer
fdec2d21ef dm: i2c: Add driver for Cadence I2C IP
This is a possible drop in replacement for drivers/i2c/zynq-i2c.c

Since this is cadence IP it has been renamed to cdns-i2c,
to make sense with the compatible string.

Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2016-04-13 18:29:07 +02:00
Masahiro Yamada
336399fb63 i2c: uniphier: use devm_get_addr() to get base address
Currently, fdtdec_get_addr_size() does not support the address
translation, so it cannot handle device trees with non-straight
"ranges" properties.  (This would be a problem with DTS for UniPhier
ARMv8 SoCs.)

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-04-01 00:17:13 +09:00
Guy Thouret
32b9b556f7 omap24xx_i2c: Implement CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
Signed-off-by: Guy Thouret <guy.thouret@wems.co.uk>
Cc: Heiko Schocher <hs@denx.de>
2016-03-28 09:23:28 +02:00
Peng Fan
e1bed80272 dm: i2c: mxc_i2c: implement i2c_idle_bus
Implement i2c_idle_bus in driver, then setup_i2c can
be dropped for boards which enable DM_I2C/DM_GPIO/PINCTRL.
The i2c_idle_bus force bus idle flow follows setup_i2c in
arch/arm/imx-common/i2c-mxv7.c

This patch is an implementation following linux kernel patch:
"
commit 1c4b6c3bcf30d0804db0d0647d8ebeb862c6f7e5
Author: Gao Pan <b54642@freescale.com>
Date:   Fri Oct 23 20:28:54 2015 +0800

    i2c: imx: implement bus recovery

    Implement bus recovery methods for i2c-imx so we can recover from
    situations where SCL/SDA are stuck low.

    Once i2c bus SCL/SDA are stuck low during transfer, config the i2c
    pinctrl to gpio mode by calling pinctrl sleep set function, and then
    use GPIO to emulate the i2c protocol to send nine dummy clock to recover
    i2c device. After recovery, set i2c pinctrl to default group setting.
"

See Documentation/devicetree/bindings/i2c/i2c-imx.txt for detailed
description.
1. Introuduce scl_gpio/sda_gpio/bus in mxc_i2c_bus.
2. Discard the __weak attribute for i2c_idle_bus and implement it,
   since we have pinctrl driver/driver model gpio driver. We can
   use device tree, but not let board code to do this.
3. gpio state for mxc_i2c is not a must, but it is recommended. If
   there is no gpio state, driver will give tips, but not fail.
4. The i2c controller was first probed, default pinctrl state will
   be used, so when need to use gpio function, need to do
   "pinctrl_select_state(dev, "gpio")" and after force bus idle,
   need to switch back "pinctrl_select_state(dev, "default")".

This is example about how to use the gpio force bus
idle function:
"
 &i2c1 {
 	clock-frequency = <100000>;
	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c1>;
	pinctrl-1 = <&pinctrl_i2c1_gpio>;
	scl-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
	sda-gpios = <&gpio1 29 GPIO_ACTIVE_HIGH>;
	status = "okay";
	[....]
 };

[.....]

	pinctrl_i2c1_gpio: i2c1grp_gpio {
		fsl,pins = <
			MX6UL_PAD_UART4_TX_DATA__GPIO1_IO28 0x1b8b0
			MX6UL_PAD_UART4_RX_DATA__GPIO1_IO29 0x1b8b0
		>;
	};
"

Signed-off-by: Peng Fan <van.freenix@gmail.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: York Sun <york.sun@nxp.com>
2016-03-28 09:22:58 +02:00
Hans de Goede
2ca0299579 mvtwsi: Fix breakage introduced by "Fix mvtwsi not working on sun6i and newer sunxi SoCs"
"Fix mvtwsi not working on sun6i and newer sunxi SoCs" includes the following:

@@ -189,7 +200,8 @@ static int twsi_start(struct i2c_adapter *adap, int expected_status)
 	/* globally set TWSIEN in case it was not */
 	twsi_control_flags |= MVTWSI_CONTROL_TWSIEN;
 	/* assert START */
-	writel(twsi_control_flags | MVTWSI_CONTROL_START, &twsi->control);
+	twsi_control_flags |= MVTWSI_CONTROL_START | MVTWSI_CONTROL_CLEAR_IFLG;
+	writel(twsi_control_flags, &twsi->control);
 	/* wait for controller to process START */
 	return twsi_wait(adap, expected_status);
 }

The modification of twsi_control_flags done here was introduced while
merging to fix a line > 80 chars, but twsi_control_flags is a global variable
and should not be modified like this here, this commit fixes this, restoring
mvtwsi functionality.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2016-01-26 17:58:02 +01:00
Simon Glass
0c7645bde0 x86: ivybridge: Use the I2C driver to perform SMbus init
Move the init code into the I2C driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-24 12:09:41 +08:00
Simon Glass
abb0b01e7a x86: i2c: Add a stub driver for Intel I2C/SMbus
This is used on most Intel platforms. We don't have a driver for it yet, but
add a stub to handle the init. For now this targets ivybridge so we may want
to add a device tree binding and generalise it when other platforms are
supported.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-24 12:09:40 +08:00
Simon Glass
4082fce924 dm: i2c: Allow muxes to be enabled for SPL separately
Since I2C muxes are seldom needed in SPL, and the code for this increases
the size somewhat, add a separate option to enable I2C muxes for SPL.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-21 20:42:35 -07:00
Simon Glass
930bc37423 rockchip: i2c: Update the driver to use the new clock ID
We can use the new clk_get_by_index() function to get the correct clock.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-21 20:42:34 -07:00
Jelle van der Waa
9d0826879e sunxi: Add support for the I2C controller which is part of the PRCM
Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>
[hdegoede@redhat.com: Minor cleanups]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

applied with fixing 2 checkpatch warnings:
WARNING: please, no space before tabs

Signed-off-by: Heiko Schocher <hs@denx.de>
2016-01-21 07:30:01 +01:00
Hans de Goede
904dfbfd67 i2c: mvtwsi: Fix mvtwsi not working on sun6i and newer sunxi SoCs
On sun6i and newer IFLG is a write-clear bit which is cleared by writing 1,
rather then a normal r/w bit which is cleared by writing 0.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>

applied with fixing 3 checkpatch warnings
in drivers/i2c/mvtwsi.c:
WARNING: line over 80 characters
ERROR: code indent should use tabs where possible
WARNING: please, no spaces at the start of a line

Signed-off-by: Heiko Schocher <hs@denx.de>
2016-01-21 07:23:29 +01:00
Tom Rini
5b8031ccb4 Add more SPDX-License-Identifier tags
In a number of places we had wordings of the GPL (or LGPL in a few
cases) license text that were split in such a way that it wasn't caught
previously.  Convert all of these to the correct SPDX-License-Identifier
tag.

Signed-off-by: Tom Rini <trini@konsulko.com>
2016-01-19 08:31:21 -05:00
Stefan Roese
81e33f4b65 arm: mvebu: Move SoC selection (A38X vs AXP) into Kconfig
Until now, the SoC selection for the ARCH_MVEBU platforms has been done
in the config header. Using CONFIG_ARMADA_XP in a non-clear way. As
it needed to get selected for AXP and A38x based boards. This patch
now changes this to move the SoC selection to Kconfig. And also
uses CONFIG_ARCH_MVEBU as a common define for both AXP and A38x.
This makes things a bit clearer - especially for new board additions.

Additionally the defines CONFIG_SYS_MVEBU_DDR_AXP and
CONFIG_SYS_MVEBU_DDR_A38X are replaced with the already available
CONFIG_ARMADA_38X and CONFIG_ARMADA_XP.

And CONFIG_DDR3 is removed, as its not referenced anywhere.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
2016-01-14 14:08:59 +01:00
Tom Rini
f1993ca066 Merge branch 'master' of git://www.denx.de/git/u-boot-imx 2016-01-03 10:32:24 -05:00
Gong Qianyu
aee3fddb67 i2c: mxc: add a condition in case the parameter is NULL
This could avoid executing the code that only applies to i.MX platforms.

The bus_i2c_init() is called before relocation and will assgin value
to a static variable. If U-Boot is then still running in a flash
device, it's theoretically not allowed to write data to flash without
an erasing operation. For i.MX platforms, the U-Boot is always running
in DDR.

Actually it causes asynchronous error when the ARM64 system error
report is enabled and the flash write protect is set.

Signed-off-by: Gong Qianyu <Qianyu.Gong@freescale.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2016-01-03 16:01:41 +01:00
Michal Simek
0305be1087 Kconfig: i2c: Fix indentation
Use tabs instead of space for indentation.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2015-12-11 06:30:01 +01:00
Michal Simek
61d815a2cb Kconfig: i2c: Fix typo Suport -> Support
Fix typo in command description.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2015-12-11 06:29:54 +01:00
Heiko Schocher
f300dccde4 i2c, avr32: fix compiler warning "input is not relaxable"
compiling U-Boot for avr32 boards shows since
commit 3d1957f0ea "dm: i2c: Add support for multiplexed I2C buses"
this warning:

Building current source for 4 boards (4 threads, 8 jobs per thread)
     avr32:  +   atstk1002
+(atstk1002) drivers/i2c/built-in.o: warning: input is not relaxable
     avr32:  +   grasshopper
+(grasshopper) drivers/i2c/built-in.o: warning: input is not relaxable
     avr32:  +   atngw100
+(atngw100) drivers/i2c/built-in.o: warning: input is not relaxable
     avr32:  +   atngw100mkii
+(atngw100mkii) drivers/i2c/built-in.o: warning: input is not relaxable
    0    4    0 /4      0:00:16  : atngw100mkii

Fix it.

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Roger Meier <r.meier@siemens.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
2015-11-23 14:47:48 +01:00
Simon Glass
24b852a7a2 Move console definitions into a new console.h file
The console includes a global variable and several functions that are only
used by a small subset of U-Boot files. Before adding more functions, move
the definitions into their own header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-11-19 20:27:50 -07:00
Dirk Eibach
37b33254c2 i2c: soft_i2c: Fix bus indizes
Since busses are sorted in alphabetical order, introducing more
than nine busses led to unexpected behaviour.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
2015-11-12 18:04:12 -05:00
Dirk Eibach
5c3b6dc1fb hrcon: Add fan controllers
Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
2015-11-12 18:04:10 -05:00
Dirk Eibach
7ed45d3d0a hrcon: Add support for the DH variant
hrcon DH(dual head) has two video outputs per FPGA.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
2015-11-12 18:04:10 -05:00
Dirk Eibach
457491565b i2c: ihs_i2c: Fix hold_bus control
Bus has to be held for repeated start regardless of
read/write access.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Acked-by: Heiko Schocher <hs@denx.de>
2015-11-12 15:59:02 -05:00
Dirk Eibach
3af0cdb137 i2c: ihs_i2c: Use macro bestpractices
Reinhard Pfau complained that macros in ihs_i2c do not follow best practices.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Acked-by: Heiko Schocher <hs@denx.de>
2015-11-12 15:59:01 -05:00
Dirk Eibach
071be89694 i2c: ihs_i2c: Dual channel support
Support two i2c masters per FPGA.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Acked-by: Heiko Schocher <hs@denx.de>
2015-11-12 15:59:01 -05:00
Tom Rini
588eec2a86 Merge branch 'master' of git://git.denx.de/u-boot-fsl-qoriq 2015-10-30 12:56:58 -04:00
Mingkai Hu
9f3183d2d6 armv8/fsl_lsch3: Change arch to fsl-layerscape
There are two LS series processors are built on ARMv8 Layersacpe
architecture currently, LS2085A and LS1043A. They are based on
ARMv8 core although use different chassis, so create fsl-layerscape
to refactor the common code for the LS series processors which also
paves the way for adding LS1043A platform.

Signed-off-by: Mingkai Hu <Mingkai.Hu@freescale.com>
Signed-off-by: Hou Zhiqiang <B48286@freescale.com>
Signed-off-by: Gong Qianyu <Qianyu.Gong@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
2015-10-29 10:34:00 -07:00
Michal Simek
009902a871 i2c: Instantiate I2C controllers when selected
Do not enable both I2C controllers by default. Enable them only when
they are selected.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2015-10-28 09:53:49 +01:00
Albert ARIBAUD \\(3ADEV\\)
03544c6640 I2C: mxc_i2c: make I2C1 and I2C2 optional
The driver assumed that I2C1 and I2C2 were always enabled,
and if they were not, then an asynchronous abort was (silently)
raised, to be caught much later on in the Linux kernel.

Fix this by making I2C1 and I2C2 optional just like I2C3 and I2C4
are.

To make the change binary-invariant, declare I2C1 and I2C2 in
every include/configs/ file which defines CONFIG_SYS_I2C_MXC.

Also, while updating README about CONFIG_SYS_I2C_MXC_I2C1 and
CONFIG_SYS_I2C_MXC_I2C2, add missing descriptions for I2C4 speed
(CONFIG_SYS_MXC_I2C4_SPEED) and slave (CONFIG_SYS_MXC_I2C4_SLAVE)
config options.

Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
2015-10-02 10:42:31 +02:00
Stefan Roese
68282f55b8 arm: Remove unused ST-Ericsson u8500 arch
This arch does not seem to be supported / used at all in the current
U-Boot mainline source tree any more. So lets remove the core u8500 code
and code that was only referenced by this platform.

Please note that this patch also removes these config options:

- CONFIG_PL011_SERIAL_RLCR
- CONFIG_PL011_SERIAL_FLUSH_ON_INIT

As they only seem to be referenced by u8500 based boards. Without any
such board in the current code, these config option don't make sense
any more. Lets remove them as well.

If someone still wants to use this platform, then please send patches
to re-enable support by adding at least one board that references this
code.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: John Rigby <john.rigby@linaro.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-09-15 15:05:21 -04:00
Simon Glass
3437469985 rockchip: Add I2C driver
Add an I2C driver for the Rockchip RK3288, using driver model. It should work
for other Rockchip SoCs also.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-09-02 21:28:24 -06:00
Simon Glass
4e9838c102 dm: Use dev_get_addr() where possible
This is a convenient way for a driver to get the hardware address of a
device, when regmap or syscon are not being used. Change existing callers
to use it as an example to others.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
2015-08-31 07:57:26 -06:00
Masahiro Yamada
0f9258228e of: clean up OF_CONTROL ifdef conditionals
We have flipped CONFIG_SPL_DISABLE_OF_CONTROL.  We have cleansing
devices, $(SPL_) and CONFIG_IS_ENABLED(), so we are ready to clear
away the ugly logic in include/fdtdec.h:

 #ifdef CONFIG_OF_CONTROL
 # if defined(CONFIG_SPL_BUILD) && !defined(SPL_OF_CONTROL)
 #  define OF_CONTROL 0
 # else
 #  define OF_CONTROL 1
 # endif
 #else
 # define OF_CONTROL 0
 #endif

Now CONFIG_IS_ENABLED(OF_CONTROL) is the substitute.  It refers to
CONFIG_OF_CONTROL for U-boot proper and CONFIG_SPL_OF_CONTROL for
SPL.

Also, we no longer have to cancel CONFIG_OF_CONTROL in
include/config_uncmd_spl.h and scripts/Makefile.spl.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2015-08-18 13:46:05 -04:00
Vladimir Zapolskiy
ea16c6a13b i2c: lpc32xx: correct sanity check for requested bus speed
LPC32xx has 3 I2C bus controllers, 2 of them are used as generic ones
and their parent clock is HCLK and CLK_HI/CLK_LO registers are 10 bit
wide. This means that if HCLK is 104MHz, then minimal configurable I2C
clock speed is about 51KHz.

Only USB OTG I2C bus controller CLK registers are 8 bit wide, thus in
assumption that peripheral clock is 13MHz it allows to set the minimal
bus speed about 25.5KHz.

Check for negative half clock value is removed since it is always false.

The change fixes the following problem for I2C busses 0 and 1:

  => i2c dev 0
  Setting bus to 0
  => i2c speed 100000
  Setting bus speed to 100000 Hz
  Failure changing bus speed (-22)

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Tested-by: Sylvain Lemieux <slemieux@tycoint.com>
2015-08-18 13:45:59 -04:00
Sylvain Lemieux
1933af15e2 i2c: lpc32xx: add support for OTG I2C
Updated the LPC32xx I2C driver to support
the OTG I2C that is part of the USB module.

Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
Acked-by: Marek Vasut <marex@denx.de>
2015-08-18 13:45:57 -04:00
Sylvain Lemieux
58243001a9 i2c: lpc32xx: fix write timeout
Fix a condition that generate watchdog timeout inside "lpc32xx_i2c_write" when parameters alen = 0 and len = 0.

Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
2015-08-17 08:11:50 -04:00
Sylvain Lemieux
3d2b6a2e5f i2c: lpc32xx: fix read timeout
Fix a condition that generate watchdog timeout inside "lpc32xx_i2c_read" when parameters alen != 0 and len = 0.

Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
2015-08-17 08:11:49 -04:00
Sylvain Lemieux
b395a996a6 i2c: lpc32xx: use api to get hclk instead of fix value
The HCLK is not constant and can take different value; use the api function to get the value of the HCLK for the I2C clock high and low computation.

Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
2015-08-17 08:11:49 -04:00
Masahiro Yamada
0b11dbf705 drivers: hierarchize drivers Kconfig menu
The menuconfig for drivers are getting more and more cluttered
and unreadable because too many entries are displayed in a single
flat menu.  Use hierarchic menu for each category.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[trini: Update to apply again in a few places, drop USB hunk]
Signed-off-by: Tom Rini <trini@konsulko.com>
2015-08-12 20:47:44 -04:00
Simon Glass
f48eaf01b2 cros_ec: Support the LDO access method used by spring
Add a driver to support the special LDO access used by spring. This is a
custom method in the cros_ec protocol - it does not use an I2C
pass-through.

There are two implementation choices:

1. Write a special LDO driver which can talk across the EC. Duplicate all
the logic from TPS65090 for retrying when the LDO fails to come up.

2. Write a special I2C bus driver which pretends to be a TPS65090 and
transfers reads and writes using the LDO message.

Either is distasteful. The latter method is chosen since it results in less
code duplication and a fairly simple (30-line) implementation of the core
logic.

The crosec 'ldo' subcommand could be removed (since i2c md/mw will work
instead) but is retained as a convenience.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-05 21:06:11 -06:00
Simon Glass
cc456bd7df dm: cros_ec: Convert the I2C tunnel code to use driver model
The Chrome OS EC supports tunnelling through to an I2C bus on the EC. This
currently uses a copy of the I2C command code and a special 'crosec'
sub-command.

With driver model we can define an I2C bus which tunnels through to the EC,
and use the normal 'i2c' command to access it. This simplifies the code and
removes some duplication.

Add an I2C driver which tunnels through to the EC. Adjust the EC code to
support binding child devices so that it can be set up. Adjust the existing
I2C xfer function to fit driver model better.

For now the old code remains to allow things to still work. It will be
removed in a later patch once the new flow is fully enabled.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-05 21:06:11 -06:00
Simon Glass
45d9ae87cb exynos: i2c: Tidy up the driver model code
The existing driver model implementation uses the old non-driver-model code
to operate, but has become impossibly tangled as a result. The actual
algorithm is quite simple.

Also the normal-speed and high-speed buses are quite different and it
doesn't seem that useful to put them in the same driver.

Finally, there is a bug which breaks communication with the Maxim sound
codec and may cause problems with other device.

Rewrite the driver model code for normal-speed operation so that it is
easier to understand, and fix the bug. Add a TODO to split the drivers.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
2015-08-05 21:06:10 -06:00
Simon Glass
26ea76850e exynos: i2c: Fix code style with ReadWriteByte()
This function should not use mixed case, and it is simpler to use
clrbits_le32() when clearing bits. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-08-05 21:06:10 -06:00
Simon Glass
b725dc458f i2c: Add a mux for GPIO-based I2C bus arbitration
While I2C supports multi-master buses this is difficult to get right.
The implementation on the master side in software is quite complex.
Clock-stretching and the arbitrary time that an I2C transaction can take
make it difficult to share the bus fairly in the face of high traffic.
When one or more masters can be reset independently part-way through a
transaction it is hard to know the state of the bus.

This driver provides a scheme based on two 'claim' GPIOs, one driven by the
AP (Application Processor, meaning the main CPU) and one driven by the EC
(Embedded Controller, a small CPU aimed at handling system tasks). With
these they can communicate and reliably share the bus. This scheme has
minimal overhead and involves very little code. It is used on snow to
permit the EC and the AP to share access to the main system PMIC and
battery. The scheme can survive reboots by either side without difficulty.
This scheme has been tested in the field with millions of devices.

Since U-Boot runs on the AP, the terminology used is 'our' claim GPIO,
meaning the AP's, and 'their' claim GPIO, meaning the EC's. This terminology
is used by the device tree bindings in Linux also.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-05 21:06:10 -06:00
Simon Glass
3d1957f0ea dm: i2c: Add support for multiplexed I2C buses
Add a new I2C_MUX uclass. Devices in this class can multiplex between
several I2C buses, selecting them one at a time for use by the system.
The multiplexing mechanism is left to the driver to decide - it may be
controlled by GPIOs, for example.

The uclass supports only two methods: select() and deselect().

The current mux state is expected to be stored in the mux itself since
it is the only thing that knows how to make things work. The mux can
record the current state and then avoid switching unless it is necessary.
So select() can be skipped if the mux is already in the correct state.
Also deselect() can be made a nop if required.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-05 21:06:10 -06:00
Simon Glass
df358c6bec dm: i2c: Add a function to transfer messages
Sometimes it is useful to be able to transfer a raw I2C message. This
happens when the chip address needs to be set manually, or when the data to
be sent/received is in another buffer.

Add a function to provide access to this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-08-05 20:57:51 -06:00
Simon Glass
7d7db2225c dm: i2c: Add a message debug function
Add a way to dump the contents of an I2C message for debugging purposes.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-08-05 20:57:51 -06:00
Tom Rini
7a1af7a79b Merge branch 'master' of git://www.denx.de/git/u-boot-imx 2015-08-02 07:40:37 -04:00
Thierry Reding
8e67c5d047 i2c: tegra: Build warning fixes for 64-bit
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2015-07-27 15:53:57 -07:00
Stefano Babic
f448c5d320 Merge branch 'master' of git://git.denx.de/u-boot 2015-07-17 11:22:56 +02:00
Simon Glass
8fd3ec770c exynos: i2c: Correct bug in pinmux selection
When driver model is not used the current code does not correctly select
the pinmux for the I2C bus. This bug was introduced by this commit:

8dfcbaa dm: i2c: s3c24x0: adjust to dm-i2c api

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Przemyslaw Marczak <p.marczak@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2015-07-10 21:13:48 +09:00
Albert ARIBAUD \(3ADEV\)
b44e60ac04 i2c: fix vf610 support
Add support in mxc_i2c driver, iomux_v3 and vf610 architecture for the four
I2C instances available in VF610.

Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
2015-07-10 10:10:48 +02:00
Simon Glass
a2879764ba dm: i2c: Add compatibility functions for dm_i2c_reg_read/write()
Add the legacy i2c_reg_read/write() functions to the compatibility layer
so that they can be used when CONFIG_DM_I2C_COMPAT is defined.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-06-10 19:26:54 -06:00
Tom Rini
43b1ff5f33 Merge branch 'master' of git://git.denx.de/u-boot-uniphier 2015-05-30 20:16:01 -04:00
Masahiro Yamada
b6ef3a3f04 ARM: UniPhier: update the vendor name of UniPhier in Kconfig
The business for UniPhier Soc family has been transferred from
Panasonic Corporation to Socionext Inc.

Update the SoC select menu in Kconfig.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-05-31 02:55:30 +09:00
Masahiro Yamada
f6e7f07c17 ARM: UniPhier: replace <asm/io.h> with <linux/io.h>
In the Linux coding style, it is recommended to include <linux/io.h>
rather than <asm/io.h>.  Follow this trend.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-05-31 02:53:56 +09:00
Hannes Schmelzer
4c302b9a65 cosmetic: change Author/MAINTAINER Name from Petermaier to Schmelzer
Since i've been married, i also have a new surname.
Mr. Petermaier moved to Mr. Schmelzer.

In this patch i update all files in which my (old) name is present.

Signed-off-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com>

Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>
2015-05-28 11:17:48 -04:00
Tom Rini
9bea236b34 Merge branch 'master' of git://www.denx.de/git/u-boot-imx 2015-05-26 10:38:01 -04:00
Heiko Schocher
e6c8b716c7 i2c, mxc: rework i2c base address names for different SoCs
rework and unify i2c address names for different SoCs, which
use the mxc_i2c driver.

Signed-off-by: Heiko Schocher <hs@denx.de>
2015-05-26 14:17:00 +02:00
Heiko Schocher
21a26940f9 arm, imx6, i2c: add I2C4 for MX6DL
add I2C4 modul for MX6DL based boards.

Signed-off-by: Heiko Schocher <hs@denx.de>
2015-05-26 14:16:54 +02:00
Tom Rini
0e6b7a2824 Merge git://git.denx.de/u-boot-samsung 2015-05-18 09:15:15 -04:00
Przemyslaw Marczak
a989ec8dd4 sandbox: i2c: search child emul dev and check its uclass id
The function get_emul() in sandbox i2c bus driver, always returns
first child as i2c emul device. This may only work for i2c devices
with a single child, which is an only i2c emul device.

In case when i2c device has more than one child (e.g. PMIC), and
one is i2c emul, then the function should search it by check uclass
id for each child. This patch add this change to the get_emul().

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Tested on sandbox:
Tested-by: Simon Glass <sjg@chromium.org>
2015-05-14 19:58:34 -06:00
Peng Fan
71204e95ce i2c: mxc: refactor i2c driver and support dm
1. Introduce a new structure `struct mxc_i2c_bus`, this structure will
   used for non-DM and DM.
2. Remove `struct mxc_i2c_regs` structure, but use register offset to access
   registers based on `base` entry of `struct mxc_i2c_bus`.
3. Remove most `#ifdef I2C_QUIRK_REG`. Using driver_data to contain platform
   flags. A new flag is introduced, I2C_QUIRK_FLAG.
4. Most functions use `struct mxc_i2c_bus` as one of the parameters.
   Make most functions common to DM and non-DM, try to avoid duplicated code.
5. Support DM, but pinctrl is not included. Pinmux setting is still set
   by setup_i2c, but we do not need bus_i2c_init for DM.
6. struct i2c_parms and struct sram_data are removed.
7. Remove bus_i2c_read bus_i2c_write prototype in header file. The frist
   paramter of bus_i2c_init is modified to i2c index. Add new prototype
   i2c_idle_bus and force_bus_idle. Since bus_i2c_init is not good for
   DM I2C and pinctrl is missed, we use a weak function for i2c_idle_bus.
   Board file take the responsibility to implement this function, like this:
   "
   int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus)
   {
	   if (i2c_bus->index == 0)
		   force_bus_idle(i2c_pads_info0);
	   else if (i2c_bus->index == 1)
		   force_bus_idle(i2c_pads_info1);
	   else
		   xxxxxx
   }
   "
8. Introduce a weak function, enable_i2c_clk
9. Tested on an i.MX7 platform. Log info:
 => dm tree
 Class       Probed   Name
 ----------------------------------------
 root        [ + ]    root_driver
 simple_bus  [   ]    |-- soc
 simple_bus  [   ]    |   |-- aips-bus@30000000
 simple_bus  [   ]    |   |   |-- anatop@30360000
 simple_bus  [   ]    |   |   `-- snvs@30370000
 simple_bus  [   ]    |   |-- aips-bus@30400000
 simple_bus  [   ]    |   `-- aips-bus@30800000
 i2c         [   ]    |       |-- i2c@30a20000
 i2c         [   ]    |       `-- i2c@30a40000
 simple_bus  [   ]    `-- regulators
 => i2c dev 0
 Setting bus to 0
 => i2c probe
 Valid chip addresses: 08 50
 => i2c md 8 31
 0031: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-05-14 18:49:36 -06:00
Simon Glass
01501804fd dm: i2c: Add a function to find out the chip offset length
We can currently set this but there is no API function to get it. Add one.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Heiko Schocher<hs@denx.de>
2015-05-14 18:49:33 -06:00
Marek Vasut
7b0c0f69a4 i2c: s3c: Implant support for S3C2440
This is a matter of simple additional ifdefery to cater
for the different register layout of the S3C2440 chip.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2015-05-06 17:00:58 +09:00
Axel Lin
76382aa2ce dm: i2c-gpio: Remove redundant dm_gpio_set_value() call
dm_gpio_set_dir_flags() will also set gpio output value when switching to
gpio output. So it's not necessary to call dm_gpio_set_value() after
dm_gpio_set_dir_flags() call.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-05-05 20:58:41 -06:00
Simon Glass
182bf92d19 dm: i2c: Add an explicit test mode to the sandbox I2C driver
At present this driver has a few test features. They are needed for running
the driver model unit tests but are confusing and unnecessary if using
sandbox at the command line. Add a flag to enable the test mode, and don't
enable it by default.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-05-05 20:58:19 -06:00
Simon Glass
ba3864f803 dm: i2c: Add functions to read and write a register
Add driver model versions of the legacy functions to read and write a
single byte register. These are a useful shortcut in many cases.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-05-05 20:58:19 -06:00
Simon Glass
1bde67b1f4 dm: i2c: sandbox: Add debugging to the speed limit
Print a debug() message with the I2C speed is exceeded.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-05-05 20:58:19 -06:00
York Sun
f8cb101e1e driver/i2c/mxc: Enable I2C bus 3 and 4
Some SoCs have more than two I2C busses. Instead of adding ifdef
to the driver, macros are put into board header file where
CONFIG_SYS_I2C_MXC is defined.

Signed-off-by: York Sun <yorksun@freescale.com>
CC: Heiko Schocher <hs@denx.de>
2015-04-23 08:55:53 -07:00
Simon Glass
1174aada87 sandbox: Move CONFIG_SYS_I2C_SANDBOX to Kconfig
Move this over to Kconfig and tidy up.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher<hs@denx.de>
2015-04-18 11:11:38 -06:00
Simon Glass
39de843352 dm: core: Rename driver data function to dev_get_driver_data()
The existing get_get_of_data() function provides access to both the driver's
compatible string and its driver data. However only the latter is actually
useful. Update the interface to reflect this and fix up existing users.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
2015-04-18 11:11:19 -06:00
Przemyslaw Marczak
c54473cb25 dm: i2c: add i2c-gpio driver
This commit adds driver model support to software emulated i2c bus driver.
This driver supports kernel-style device tree bindings. Fdt properties in use:
- compatible - "i2c-gpio"
- gpios      - data and clock GPIO pin phandles
- delay-us   - micro seconds delay between GPIOs toggle operations,
               which is 1/4 of I2C speed clock period.

Added:
- Config: CONFIG_DM_I2C_GPIO
- File: drivers/i2c/i2c-gpio.c
- File: doc/device-tree-bindings/i2c/i2c-gpio.txt

Driver base code is taken from: drivers/i2c/soft-i2c.c, changes:
- use "i2c-gpio" naming
- update comments style
- move preprocesor macros into functions
- add device tree support
- add driver model i2c support
- code cleanup,
- add Kconfig entry

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Added braces in i2c_gpio_xfer() to fix style nit:
Signed-off-by: Simon Glass <sjg@chromium.org>
2015-04-18 11:11:17 -06:00
Przemyslaw Marczak
705fcf4de4 Kconfig: i2c: fix help message related to dm i2c
Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-04-18 11:11:17 -06:00
Joe Hershberger
0eb25b6196 common: Make sure arch-specific map_sysmem() is defined
In the case where the arch defines a custom map_sysmem(), make sure that
including just mapmem.h is sufficient to have these functions as they
are when the arch does not override it.

Also split the non-arch specific functions out of common.h

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2015-04-18 11:11:09 -06:00
Simon Glass
e564f054af dm: core: Add dev_get_uclass_priv() to access uclass private data
Add a convenience function to access the private data that a uclass stores
for each of its devices. Convert over most existing uses for consistency
and to provide an example for others.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-04-16 19:27:42 -06:00
Paul Kocialkowski
dd82242b4d i2c: mvtwsi: Support for up to 4 different controllers
Orion5x, Kirkwood and Armada XP platforms come with a single TWSI (I2C) MVTWSI
controller. However, other platforms using MVTWSI may come with more: this is
the case on Allwinner (sunxi) platforms, where up to 4 controllers can be found
on the same chip.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-04-15 16:33:17 +02:00
Albert ARIBAUD \(3ADEV\)
5e862b9539 lpc32xx: i2c: add LPC32xx I2C interface support
Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
2015-04-10 14:23:07 +02:00
Stefan Roese
f582a1583b i2c: mvtwsi: Fix problem with baud rate calculation
The current implementation for baudrate calculation is incorrect.
This part from the formula:

"2 ^ (n + 1)" is not equivalent to (1 << n) but to (2 << n)!

This patch fixes this and moves this calculation to a function instead of using a macro.
This new function is taken from the Linux kernel.

This was detected and tested on the Marvell Armada A38x DB-88F6820-GP eval board.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Ian Campbell <ijc@hellion.org.uk>
Cc: Heiko Schocher <hs@denx.de>
Acked-by: Hans de Goede <hdegoede@redhat.com>
2015-03-18 09:48:42 +01:00
Rob Herring
e6fbc3e4f1 mv_i2c: fix warnings on 64-bit builds
Change addresses to unsigned long to be compatible with 64-bit builds.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Heiko Schocher <hs@denx.de>
2015-03-18 09:13:17 +01:00
Masahiro Yamada
6462cdedc2 ARM: UniPhier: adjust device trees for business transfer
Panasonic's System LSI products, UniPhier SoC family, have been
transferred to Socionext Inc.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-03-15 13:37:00 +09:00
Simon Glass
5c2d23bf9e dm: i2c: Add a missing memory allocaton check
This strdup() is missing a check. Add it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-03-05 19:13:35 -07:00
Simon Glass
4bba9d3f77 dm: Move CONFIG_I2C_COMPAT to Kconfig
Make this option available in Kconfig and clean up the board that uses it.
Note there is also an entry in exynos5-common.h but this affects multiple
boards and should be dropped as part of the Samsung I2C migration to
driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-02-19 06:19:18 -07:00
Simon Glass
f94a1bed07 dm: Expand and complete Kconfig in drivers/
Expand the help messages for each driver. Add missing Kconfig for I2C,
SPI flash and thermal.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2015-02-12 10:35:33 -07:00
Simon Glass
fffff7268b dm: i2c: Make API accessible even without CONFIG_DM
Make the driver model I2C API available always, even if driver model
is not enabled. This allows for a 'soft' switch-over, where drivers can
use the new structures in code which is compiled but not yet used. This
makes migration easier in some cases.

Fix up the existing drivers which define their own 'struct i2c_msg'.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-02-12 10:35:33 -07:00
Simon Glass
ca88b9b939 dm: i2c: Add a dm_ prefix to driver model bus speed functions
As with i2c_read() and i2c_write(), add a dm_ prefix to the driver model
versions of these functions to avoid conflicts.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-02-12 10:35:33 -07:00
Przemyslaw Marczak
a3e757a5d2 i2c: s3c24x0: reduce transmission status timeout
If no device is connected to I2C bus, the i2c probe command
can take a lot of time for probe each address. This commit
reduces the busy timeout to 10ms for standard and high speed
modes. This doesn't break the transmission an also allow for
properly probe the devices.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>

Changes v3:
- new commit, after split the next one
Tested-by: Simon Glass <sjg@chromium.org>
2015-02-12 10:35:29 -07:00
Simon Glass
d744d56136 dm: i2c: Add two more I2C init functions to the compatibility layer
These functions are useful in case the board calls them. Also fix a missing
parameter caused by applying the wrong patch (actually I failed to send v2
and applied v1 by mistake).

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-01-29 17:10:01 -07:00
Simon Glass
7132b9fd68 dm: i2c: dts: Support an offset-len device tree property
Since U-Boot can support different offset lengths (0-4 bytes), add a device
tree property to specify this. This avoids hard-coding it in the driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-01-29 17:10:01 -07:00
Przemyslaw Marczak
8dfcbaa681 dm: i2c: s3c24x0: adjust to dm-i2c api
This commit adjusts the s3c24x0 driver to new i2c api
based on driver-model. The driver supports standard
and high-speed i2c as previous.

Tested on Trats2, Odroid U3, Arndale, Odroid XU3

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Tested-by: Simon Glass <sjg@chromium.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-01-29 17:10:00 -07:00
Przemyslaw Marczak
18a7f6aa2d dm: i2c-uclass-compat: fix missed argument
This patch fixes build error for CONFIG_DM_I2C_COMPAT.
In i2c_get_chip_for_busnum() call, one of argument was missed,
which was offset_len. Now it is set to 'alen' as previous.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-01-29 17:09:59 -07:00
Simon Glass
e6f66ec0e7 dm: i2c: Move slave details to child platdata
At present we go through various contortions to store the I2C's chip
address in its private data. This only exists when the chip is active so
must be set up when it is probed. Until the device is probed we don't
actually record what address it will appear on.

However, now that we can support per-child platform data, we can use that
instead. This allows us to set up the address when the child is bound,
and avoid the messy contortions.

Unfortunately this is a fairly large change and it seems to be difficult to
break it down further.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2015-01-29 17:09:56 -07:00
Simon Glass
9cc36a2b89 dm: core: Add a flag to control sequence numbering
At present we try to use the 'reg' property and device tree aliases to give
devices a sequence number. The 'reg' property is often actually a memory
address, so the sequence numbers thus-obtained are not useful. It would be
better if the devices were just sequentially numbered in that case. In fact
neither I2C nor SPI use this feature, so drop it.

Some devices need us to look up an alias to number them within the uclass.
Add a flag to control this, so it is not done unless it is needed.

Adjust the tests to test this new behaviour.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2015-01-29 17:09:55 -07:00
Simon Glass
25ab4b0303 dm: i2c: Provide an offset length parameter where needed
Rather than assuming that the chip offset length is 1, allow it to be
provided. This allows chips that don't use the default offset length to
be used (at present they are only supported by the command line 'i2c'
command which sets the offset length explicitly).

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-01-29 17:09:53 -07:00
Simon Glass
73845350b6 dm: i2c: Add a compatbility layer
For boards which use multiple I2C devices, or for SOCs which support
multiple boards, we might want to convert these to driver model at different
times. At present this is difficult because we need to either use
CONFIG_DM_I2C for a board or not.

Add a compatibility layer which implements the old API, thus allowing a
board to move to driver model for I2C without requiring that everything it
uses is moved in the same commit.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-01-29 17:09:53 -07:00
Simon Glass
f9a4c2da72 dm: i2c: Rename driver model I2C functions to permit compatibility
Add a dm_ prefix to driver model I2C functions so that we can keep the old
ones around.

This is a little unfortunate, but on reflection it is too difficult to
change the API. We can undo this rename when most boards and drivers are
converted to use driver model for I2C.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-01-29 17:09:53 -07:00
Masahiro Yamada
238bd0b8ce i2c: UniPhier: add driver for UniPhier FIFO-builtin i2c controller
This commit adds on-chip I2C driver used on newer SoCs of Panasonic
UniPhier platform.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-01-29 17:09:49 -07:00
Masahiro Yamada
26f820f3f1 i2c: UniPhier: add driver for UniPhier i2c controller
This commit adds on-chip I2C driver used on some old Panasonic
UniPhier SoCs.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-01-29 17:09:49 -07:00
Masahiro Yamada
b6036bcd2a i2c: add CONFIG_DM_I2C to Kconfig
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-01-29 17:09:48 -07:00
Peng Fan
c36ecf3abf i2c:mxc fix array size of i2c_data
We should not hardcode array size of i2c_data to 3. To CONFIG_FSL_LSCH3,
there are 4 i2c interface, but not 3. So the size of i2c_data array should
be calculated using "ARRAY_SIZE(i2c_bases)".

To avoid compile error, move i2c_bases before sram_data structure which
contains i2c_data array.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
2015-01-08 11:00:45 -05:00
Simon Glass
b0e6ef4640 dm: i2c: tegra: Convert to driver model
This converts all Tegra boards over to use driver model for I2C. The driver
is adjusted to use driver model and the following obsolete CONFIGs are
removed:

   - CONFIG_SYS_I2C_INIT_BOARD
   - CONFIG_I2C_MULTI_BUS
   - CONFIG_SYS_MAX_I2C_BUS
   - CONFIG_SYS_I2C_SPEED
   - CONFIG_SYS_I2C

This has been tested on:
- trimslice (no I2C)
- beaver
- Jetson-TK1

It has not been tested on Tegra 114 as I don't have that board.

Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-12-11 13:18:44 -07:00
Simon Glass
d19de0d314 dm: i2c: Add a sandbox I2C driver
This driver includes some test features such as only supporting certain
bus speeds. It passes its I2C traffic through to an emulator.

Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-12-11 13:18:42 -07:00
Simon Glass
c70c71d833 dm: i2c: Add I2C emulation driver for sandbox
In order to test I2C we need some sort of emulation interface. Add hooks
to allow a driver to emulate an I2C device for sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-12-11 13:18:42 -07:00
Simon Glass
c6202d857e dm: i2c: Add a uclass for I2C
The uclass implements the same operations as the current I2C framework but
makes some changes to make it fit driver model better:

- Remove the chip address from API calls
- Remove the address length from API calls
- Remove concept of 'current' I2C bus
- Drop all existing init functions

Acked-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-12-11 13:18:42 -07:00
Mark Tomlinson
f4ed36964a i2c: Correct spelling error
"diconnect" and "disconnet" should both be "disconnect".

Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
2014-12-08 07:27:22 +01:00
Mark Tomlinson
2fe50ef403 i2c: Fix deselection of muxes
Due to an uninitialised variable, when muxes were deselected, any value
could be written to the mux control register. On the PCA9548, this could
result in multiple channels being selected, thus enabling multiple
pull-up resistors, and much bus capacitance.

The fix is simply to initialise the written value to zero.

Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
2014-12-08 07:27:06 +01:00
Masahiro Yamada
b41411954d linux/kernel.h: sync min, max, min3, max3 macros with Linux
U-Boot has never cared about the type when we get max/min of two
values, but Linux Kernel does.  This commit gets min, max, min3, max3
macros synced with the kernel introducing type checks.

Many of references of those macros must be fixed to suppress warnings.
We have two options:
 - Use min, max, min3, max3 only when the arguments have the same type
   (or add casts to the arguments)
 - Use min_t/max_t instead with the appropriate type for the first
   argument

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Pavel Machek <pavel@denx.de>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
[trini: Fixup arch/blackfin/lib/string.c]
Signed-off-by: Tom Rini <trini@ti.com>
2014-11-23 06:48:30 -05:00