Commit Graph

16296 Commits

Author SHA1 Message Date
AKASHI Takahiro
70a64a070e arm: qemu: fix failure in flash initialization if booting from TF-A
If U-Boot is loaded and started from TF-A (you need to change
SYS_TEXT_BASE to 0x60000000), it will hang up at flash initialization.

If secure mode is off (default, or -machine virt,secure=off) at qemu,
it will provide dtb with two flash memory banks:
	flash@0 {
		bank-width = <0x4>;
		reg = <0x0 0x0 0x0 0x4000000 0x0 0x4000000 0x0 0x4000000>;
		compatible = "cfi-flash";
	};
If secure mode is on, on the other hand, qemu provides dtb with 1 bank:
	flash@0 {
		bank-width = <0x4>;
		reg = <0x0 0x4000000 0x0 0x4000000>;
		compatible = "cfi-flash";
	};

As a result, flash_init()/flash_get_size() will eventually fail.
With this patch applied, relevant CONFIG values are modified.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-07-18 11:31:28 -04:00
AKASHI Takahiro
6324d50679 arm: move CONFIG_TFABOOT to generic Kconfig
Currently, CONFIG_TFABOOT is located in armv8/fsl-layerscape Kconfig,
but it will be also useful for other targets if some additional
configuration are necessary.
So move it to arch/arm/Kconfig.

Please note that CONFIG_TFABOOT still depends on
CONFIG_ARCH_SUPPORT_TFABOOT and so the menu won't come up
if any target doesn't need its own customization for TF-A boot.
This will maintain the compatibility.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Cc: York Sun <york.sun@nxp.com>
Cc: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Cc: Priyanka Jain <priyanka.jain@nxp.com>
Cc: Sriram Dash <sriram.dash@nxp.com>
Cc: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Cc: Peng Ma <peng.ma@nxp.com>
Cc: Yuantian Tang <andy.tang@nxp.com>
Cc: Pankit Garg <pankit.garg@nxp.com>
2019-07-18 11:31:27 -04:00
Heinrich Schuchardt
0c1456d571 ARM: correct detection of thumb mode
When a crash occurs in thumb mode the crash dump is incorrect. This is due
to the usage of a non-existing configuration variable CONFIG_ARM_THUMB in
the definition of macro thumb_mode(regs).

Use CONFIG_IS_ENABLED(SYS_THUMB_BUILD) to detect that the code has been
compiled for thumb mode. Remove ARM_THUMB from config_whitelist.txt.

With the patch crash dumps indicate thumb mode correctly.

On a system with thumb mode:

=> exception unaligned
data abort
pc : [<8f7a2b52>]          lr : [<8f7ab1ef>]
reloc pc : [<1780cb52>]    lr : [<178151ef>]
sp : 8ed8c3f8  ip : 8f7a2b4d     fp : 00000002
r10: 8f7f8228  r9 : 8ed95ea8     r8 : 8ed99488
r7 : 8f7ab141  r6 : 00000000     r5 : 8ed8c3f9  r4 : 8f7f6390
r3 : 8ed9948c  r2 : 00000001     r1 : 00000000  r0 : 8f7f6390
Flags: nzCv  IRQs off  FIQs off  Mode SVC_32 (T)
Code: 8f7e 466d f105 0501 (e9d5) 6700

The Flags line has '(T)' and in the Code line the output is in u16 groups.

On a system without thumb mode:

=> exception breakpoint
prefetch abort
pc : [<7ff5a5c8>]          lr : [<7ff675ec>]
reloc pc : [<0000e5c8>]    lr : [<0001b5ec>]
sp : 7ee0ad80  ip : 7ff5a5cc     fp : 7ff674cc
r10: 00000002  r9 : 7ef0bed8     r8 : 7ffd6214
r7 : 7ef0e080  r6 : 00000000     r5 : 7ffd4090  r4 : 00000000
r3 : 7ef0e084  r2 : 00000001     r1 : 00000000  r0 : 7ffd4090
Flags: nzCv  IRQs off  FIQs off  Mode SVC_32
Code: e1a0500d e2855001 e1c560d0 e3a00001 (e12fff1e)

The Flags line does not show '(T)' and in the Code line the output is in
u32 groups.

Reported-by: Marek Vasut <marex@denx.de>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
2019-07-18 11:31:24 -04:00
Tom Rini
0e80dda32c Merge branch 'master' of https://gitlab.denx.de/u-boot/custodians/u-boot-sunxi
- Beelink-x2 STB support (Marcus)
- H6 DDR3, LPDDR3 changes (Andre, Jernej)
- H6 pin controller, USB PHY (Andre)
2019-07-16 11:19:31 -04:00
Andre Przywara
f96238e253 sunxi: H6: Enable USB for existing boards
So far USB was not enabled for the Allwinner H6 boards, as the PHY
driver was not ready and the clock gates were missing. Since this is now
fixed, let's add the PHY and the OHCI/EHCI drivers to the build, for
all existing H6 boards.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com> # Pine-H64
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2019-07-16 17:13:15 +05:30
Andre Przywara
10cfbaabc1 sunxi: move SUNXI_GPIO to Kconfig
Probably for no particular reason SUNXI_GPIO was still defined the "old
way", in header files only.

Introduce SUNXI_GPIO to the Kconfig file in drivers/gpio to remove
another line from our dreadful config_whitelist.txt.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com> # Pine-H64
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2019-07-16 17:13:15 +05:30
Jernej Skrabec
0824384bfb sunxi: H6: Add DDR3 DRAM delay values
Add some basic line delay values to be used with DDR3 DRAM chips on
some H6 TV boxes.
Taken from a register dump after boot0 initialised the DRAM.
Put them as the default delay values for DDR3 DRAM until we know better.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2019-07-16 17:13:14 +05:30
Andre Przywara
7656d3982a sunxi: H6: Add DDR3-1333 timings
Add a routine to program the timing parameters for DDR3-1333 DRAM chips
connected to the H6 DRAM controller.

The values were gathered from doing back-calculations from a register
dump, trying to match them up with the official JEDEC DDDR3 spec.
If in doubt, the register dump values were taken for now, but the JEDEC
recommendation were added as a comment.

Many thanks to Jernej for contributing fixes!

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2019-07-16 17:13:04 +05:30
Andre Przywara
75a8a641f3 sunxi: H6: Add DDR3 support to DRAM controller driver
At the moment the H6 DRAM driver only supports LPDDR3 DRAM.

Extend the driver to cover DDR3 DRAM as well.

The changes are partly motivated by looking at the ZynqMP register
documentation, partly by looking at register dumps after boot0/libdram
has initialised the controller.

Many thanks to Jernej for contributing some fixes!

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2019-07-16 17:09:41 +05:30
Andre Przywara
770b85a418 sunxi: H6: move LPDDR3 timing definition into separate file
Currently the H6 DRAM driver only supports one kind of LPDDR3 DRAM.
Split the timing parameters for this LPDDR3 configuration  into a
separate file, to allow selecting an alternative later at compile time
(as the sunxi-dw driver does).

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2019-07-16 17:09:31 +05:30
Andre Przywara
65f80f5804 sunxi: H6: DRAM: follow recommended PHY init algorithm
The DRAM controller manual suggests to first program the PHY
initialisation parameters to the PHY_PIR register, and then set bit 0 to
trigger the initialisation. This is also used in boot0.

Follow this recommendation by setting bit 0 in a separate step.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2019-07-16 17:09:19 +05:30
Andre Przywara
1a1d1df384 sunxi: H6: DRAM: avoid memcpy() on MMIO registers
Using memcpy() is, however tempting, not a good idea: It depends on the
specific implementation of memcpy, also lacks barriers. In this
particular case the first registers were written using 64-bit writes,
and the last register using four separate single-byte writes.

Replace the memcpy with a proper loop using the writel() accessor.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2019-07-16 17:09:06 +05:30
Grygorii Strashko
6f2929d8b7 arm64: dts: k3-am654-base-board: add mcu cpsw nuss pinmux and phy defs
Add mcu cpsw nuss pinmux and phy defs required by cpsw.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
2019-07-15 13:32:26 -05:00
Grygorii Strashko
5195c10fbb arm64: dts: ti: k3-am65: add mcu cpsw node
Add mcu cpsw and its components along with scm_conf node
to have ethernet functional.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
2019-07-15 13:32:25 -05:00
Alex Marginean
ec9594a50f test: dm: add MDIO test
A very simple test for DM_MDIO, mimicks a register write/read through the
sandbox bus to a dummy PHY.

Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
2019-07-15 13:32:25 -05:00
Marcus Cooper
a9e19b8ff7 sun8i: h3: Add support for the Beelink-x2 STB
The Beelink X2 is an STB based on the Allwinner H3 SoC with a uSD slot,
2 USB ports( 1 * USB-2 Host, 1 USB OTG), a 10/100M ethernet port using the
SoC's integrated PHY, Wifi via an sdio wifi chip, HDMI, an IR receiver, a
dual colour LED and an optical S/PDIF connector.

Linux commit details about the sun8i-h3-beelink-x2.dts sync:
"ARM: dts: sun8i: h3: Add ethernet0 alias to Beelink X2"
(sha1: cc4bddade114b696ab27c1a77cfc7040151306da)

Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
2019-07-15 12:25:32 +05:30
Tom Rini
a9a3a37f92 - syscon: add support for power off
- stm32mp1: add op-tee config
 - stm32mp1: add specific commands: stboard and stm32key
 - add stm32 mailbox driver
 - solve many stm32 warnings when building with W=1
 - update stm32 gpio driver
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Merge tag 'u-boot-stm32-20190712' of https://gitlab.denx.de/u-boot/custodians/u-boot-stm

- syscon: add support for power off
- stm32mp1: add op-tee config
- stm32mp1: add specific commands: stboard and stm32key
- add stm32 mailbox driver
- solve many stm32 warnings when building with W=1
- update stm32 gpio driver
2019-07-14 09:09:49 -04:00
Adam Ford
550eebcfb4 ARM: dts: logicpd som-lvs and torpedos: Shrink SPL DTB
Since we have limited resources in SPL, it is the best interest
to keep the SPL as small as possible and that includes the DTB.
There are a few items in the device tree that can be removed,
because these boards don't use them.

Signed-off-by: Adam Ford <aford173@gmail.com>
2019-07-13 11:11:31 -04:00
Adam Ford
42f1539727 ARM: dts: logicpd-som-lv: Resync with Kernel 5.1.9
The MMC card-detect pin was incorrectly defined which was fixed.
This patch resync's the dts and removes the u-boot specific fix.

Signed-off-by: Adam Ford <aford173@gmail.com>
2019-07-13 11:11:30 -04:00
Adam Ford
4972a2a83f ARM: dts: da850: Resync with Linux 5.1.9
The da850.dtsi file had some changes.  This patch pulls in the
changes from Kernel 5.1.9

Signed-off-by: Adam Ford <aford173@gmail.com>
2019-07-13 11:11:30 -04:00
Tom Rini
2a51e16bd5 configs: Make USE_TINY_PRINTF depend on SPL||TPL and be default
The USE_TINY_PRINTF symbol only changes things within SPL and TPL
builds, so make it depend on that support.  Next, make it default as
within these cases we should rarely have need of more advanced print
formats outside of the debug context.

To do this, in a few cases we need to correct our Kconfig dependencies
as we had cases of non-SPL targets select'ing this symbol.  Finally, in
the case of a few boards we really do need the full printf
functionality.

Signed-off-by: Tom Rini <trini@konsulko.com>
2019-07-13 11:11:29 -04:00
Niel Fourie
6e171b661e ARM: am335x: Add phyCORE AM335x R2 support
Support for Phytech phyCORE AM335x R2 SOM (PCL060) on the Phytec
phyBOARD-Wega AM335x.

CPU  : AM335X-GP rev 2.1
Model: Phytec AM335x phyBOARD-WEGA
DRAM:  256 MiB
NAND:  256 MiB
MMC:   OMAP SD/MMC: 0
eth0: ethernet@4a100000

Working:
 - Eth0
 - i2C
 - MMC/SD
 - NAND
 - UART
 - USB (host)

Device trees were taken from Linux mainline:
commit 37624b58542f ("Linux 5.1-rc7")

Signed-off-by: Niel Fourie <lusus@denx.de>
Signed-off-by: Parthiban Nallathambi <pn@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Marek Vasut <marex@denx.de>
2019-07-13 11:11:28 -04:00
David Lechner
1d259e4d68 ARM: legoev3: convert to driver model
This converts LEGO MINDSTORMS EV3 to the driver model. MMC, SERIAL, SPI
and SPI_FLASH are converted.

The device tree contains only the minimal nodes required by U-Boot
since the size of U-Boot is limited to 256K on this device.

Signed-off-by: David Lechner <david@lechnology.com>
2019-07-13 11:11:28 -04:00
Derald D. Woods
5579e73c8c ARM: dts: omap3-evm: Sync dts(i) files from Linux 5.1.5
Signed-off-by: Derald D. Woods <woods.technical@gmail.com>
2019-07-13 11:11:27 -04:00
Patrice Chotard
6084e96b99 ARM: dts: stm32: Remove useless "st, stm32-gpio" compatible string
Since pinctrl_stm32 driver update, each gpio bank is now binded
by pinctrl driver. The compatible string "st,stm32-gpio" becomes
useless, remove it.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:50:58 +02:00
Patrick Delaunay
745b676d00 stm32mp1: bsec: Fix warnings when compiling with W=1
This patch solves the following warnings:

arch/arm/mach-stm32mp/bsec.c: In function 'stm32mp_bsec_read':
warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (offset >= STM32_BSEC_OTP_OFFSET) {
             ^~
arch/arm/mach-stm32mp/bsec.c: In function 'stm32mp_bsec_write':
warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (offset >= STM32_BSEC_OTP_OFFSET) {
             ^~
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:50:54 +02:00
Patrick Delaunay
e609e131c1 stm32mp1: Fix warnings when compiling with W=1
This patch solves the following warnings:

arch/arm/mach-stm32mp/cpu.c:378:16: warning: comparison between signed
and unsigned integer expressions [-Wsign-compare]
   if (instance > ARRAY_SIZE(serial_addr))
                ^

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:50:54 +02:00
Patrick Delaunay
e81f8d16e2 stm32mp1: activate OF_BOARD_SETUP and FDT_FIXUP_PARTITIONS
Update kernel MTD partition in device tree with U-Boot information.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:50:53 +02:00
Patrick Delaunay
152c84bce9 stm32mp1: add configuration op-tee
Add support of Trusted boot chain with OP-TEE
- reserved 32MB at the end of the DDR for OP-TEE

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:50:52 +02:00
Patrick Delaunay
35a54d41d9 ARM: dts: stm32mp1: sync device tree with v5.2-rc4
Synchronize device tree with v5.2-rc4 label and
update the associated u-boot dtsi.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Tested-by: Pierre-Jean Texier <pjtexier@koncepto.io>
2019-07-12 11:18:53 +02:00
Patrick Delaunay
f4cb5d69c2 stm32mp1: key: add stm32key command
Add dedicated command to register in fuse a public hash
key provided by keygen tool.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:18:53 +02:00
Patrick Delaunay
c60f3b3589 stm32mp1: update device tree with ETZPC status
U-Boot should disable nodes in device tree if needed according
ETZPC status in ft_system_setup().

ETZPC itself use an array on addresses to do the match between the status
bits and the node.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:18:53 +02:00
Patrick Delaunay
05d3693688 stm32mp1: update package information in device tree
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:18:53 +02:00
Patrick Delaunay
24cb4587f4 stm32mp1: export get_cpu_package function
Prepare update of package information update
in Linux device tree.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:18:53 +02:00
Patrick Delaunay
dfda7d4c83 stm32mp1: syscon: remove stgen
Reduce difference with kernel Linux device tree.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:18:53 +02:00
Patrick Delaunay
72d18583a1 stm32mp1: syscon: remove etzpc support
Support for ETZPC is removed as this device is not present
in Linux kernel device tree.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-07-12 11:18:53 +02:00
Fabien Dessenne
1958dae4f3 ARM: dts: stm32: Add ipcc mailbox support on stm32mp1
Add IPCC mailbox support on stm32mp157 eval and disco boards.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
2019-07-12 11:18:53 +02:00
Tom Rini
a9758ece08 - Sandbox improvements including .dts refactor
- Minor tracing and PCI improvements
 - Various other minor fixes
 - Conversion of patman, dtoc and binman to support Python 3
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Merge tag 'dm-pull-9jul19-take2' of https://gitlab.denx.de/u-boot/custodians/u-boot-dm

- Sandbox improvements including .dts refactor
- Minor tracing and PCI improvements
- Various other minor fixes
- Conversion of patman, dtoc and binman to support Python 3
2019-07-11 18:10:11 -04:00
Tom Rini
68deea2308 Merge https://gitlab.denx.de/u-boot/custodians/u-boot-marvell
- SPL SATA enhancements to allow booting from RAW SATA device
  needed for Clearfog (Baruch)
- Enable SATA booting on Clearfog (Baruch)
- Misc changes to Turris Omnia (Marek)
- Enable CMD_BOOTZ and increase SYS_BOOTM_LEN on crs305-1g-4s
  (Luka)
- Enable FIT support for db-xc3-24g4xg (Chris)
- Enable DM_SPI on Keymile Kirkwood board with necessary changes
  for this (Pascal)
- Set 38x and 39x AVS on lower frequency (Baruch)
2019-07-11 18:09:38 -04:00
Tom Rini
79b8d3c285 UniPhier SoC updates for v2019.10
- import DT updates from Linux
 
 - add UniPhier SPI controller driver
 
 - make U-Boot image for 64bit SoCs position independent
 
 - tidy up various init code for next generation SoCs
 
 - misc cleanups
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Merge tag 'uniphier-v2019.10' of https://gitlab.denx.de/u-boot/custodians/u-boot-uniphier

UniPhier SoC updates for v2019.10

- import DT updates from Linux

- add UniPhier SPI controller driver

- make U-Boot image for 64bit SoCs position independent

- tidy up various init code for next generation SoCs

- misc cleanups
2019-07-11 18:08:44 -04:00
Marek Vasut
b2a2bf41ac arm: mach-omap2: am33xx: Init pinmux before clock
The board_early_init_f() inits clock before initing pinmux. However,
the clock configuration code might need to adjust PMIC settings of a
PMIC on I2C bus (e.g. board/ti/am335x/board.c does that). If the I2C
bus pin muxing is not configured before attempting to communicate
with the PMIC, the communication will silently fail and the prcm_init()
may configure fast enough CPU clock that the default voltage provided
by the PMIC would be insufficient and the platform would become
unstable.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Jean-Jacques Hiblot <jjhiblot@ti.com>
Cc: Tom Rini <trini@konsulko.com>
2019-07-11 14:11:20 -04:00
Tom Rini
c76c93a3d5 configs: Rename CONFIG_IMAGE_FORMAT_LEGACY to CONFIG_LEGACY_IMAGE_FORMAT
The name CONFIG_LEGACY_IMAGE_FORMAT reads slightly better along with
allowing us to avoid a rather nasty Kbuild/Kconfig issue down the line
with CONFIG_IS_ENABLED(IMAGE_FORMAT_LEGACY).  In a few places outside of
cmd/ switch to using CONFIG_IS_ENABLED() to test what is set.

Signed-off-by: Tom Rini <trini@konsulko.com>
2019-07-11 14:11:18 -04:00
Miquel Raynal
2e8a720246 arm: spear: Return to BootROM if failing to boot from the main device
Overload the weak function board_boot_order() so that besides choosing
the main boot device, we can fallback on USB boot by returning in the
BootROM, eg. if the NOR flash is empty while it was the primary boot
medium.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2019-07-11 10:05:15 -04:00
Miquel Raynal
6d09581f78 arm: spear: Do not link the _main branch
The _main call is not supposed to return at all: don't link the
branch.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2019-07-11 10:05:15 -04:00
Miquel Raynal
f78fdee9fc arm: spear: Support returning to BootROM
Implement the weak board_return_to_bootrom() function so that when
enabling the spl_bootrom.c driver, one can make use of usbboot on
spear platforms. All necessary information to return to the BootROM
are stored in the BootROM's stack. The SPL stack pointer is reset so
we save the BootROM's stack pointer into the SPL .data section.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2019-07-11 10:05:15 -04:00
Miquel Raynal
6a9d0e275f arm: spear: Simplify start.S organization
There is no reason to do the few spear-related initialization, in a
different procedure than 'reset'. Spare one branching and get a linear
code flow by removing this indirection.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2019-07-11 10:05:15 -04:00
Miquel Raynal
08ad72ae81 arm: spear: Reference the link register with LR instead of R14
The link register is stored in R14. ARM assembly code allows to use
the 'lr' name to reference it instead of 'r14' which is not very
meaningful. Do the substitution to ease the reading.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2019-07-11 10:05:15 -04:00
Miquel Raynal
f30765b748 arm: spear: Use PUSH/POP mnemonics when relevant
Quoting ARM "RealView Compilation Tools Assembler Guide v4.0":

        PUSH and POP are synonyms for STMDB and LDM (or LDMIA), with
        the base register sp (r13), and the adjusted address written
        back to the base register.
	PUSH and POP are the preferred mnemonic in these cases.

Let's follow this recommandation to ease the reading and substitute
LDMIA/STMDB operations with PUSH/POP mnemonics.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2019-07-11 10:05:15 -04:00
Miquel Raynal
76bdaaa196 arm: spear: Purely cosmetic changes in start.S
Before cleaning a bit further the spear/start.S file, apply a few
cosmetic changes: capital letters, comment indentation and small
rewriting.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2019-07-11 10:05:15 -04:00
Miquel Raynal
10a5b3cd99 arm: spear: Fix the main comment in start.S
This comment describes the board state at the moment where we enter
the SPL. The description is entirely wrong; re-write it to fit the
reality.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Stefan Roese <sr@denx.de>
2019-07-11 10:05:15 -04:00