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e71b6f6622
u-boot-brain/drivers/i2c
History
Simon Glass e71b6f6622 i2c: designware_i2c: Rewrite timing calculation 
At present the driver can end up with timing parameters which are slightly
faster than those expected. It is possible to optimise the parameters to
get the best possible result.

Create a new function to handle the timing calculation. This uses a table
of defaults for each speed mode rather than writing it in code.

The function works by calculating the 'period' of each bit on the bus in
terms of the input clock to the controller (IC_CLK). It makes sure that
the constraints are met and that the different components of that period
add up correctly.

This code was taken from coreboot which has ended up with this same
driver, but now in a much-different form.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27 07:21:51 +01:00
..
muxes dm: gpio: Allow control of GPIO uclass in SPL 2019-12-15 08:52:29 +08:00
ast_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
ast_i2c.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
at91_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
at91_i2c.h i2c: atmel: add i2c driver 2016-08-15 22:12:00 +02:00
cros_ec_ldo.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
cros_ec_tunnel.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
davinci_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
davinci_i2c.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
designware_i2c_pci.c i2c: designware_i2c: Read device-tree properties 2020-01-27 07:21:05 +01:00
designware_i2c.c i2c: designware_i2c: Rewrite timing calculation 2020-01-27 07:21:51 +01:00
designware_i2c.h i2c: designware_i2c: Read device-tree properties 2020-01-27 07:21:05 +01:00
exynos_hs_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
fsl_i2c.c common: Move some time functions out of common.h 2019-12-02 18:23:11 -05:00
i2c_core.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
i2c-cdns.c i2c: i2c_cdns: fix write timeout on fifo boundary 2019-12-11 06:25:13 +01:00
i2c-emul-uclass.c dm: sandbox: i2c: Add a new 'emulation parent' uclass 2018-11-29 09:30:05 -07:00
i2c-gpio.c treewide: replace with error() with pr_err() 2017-10-04 11:59:44 -04:00
i2c-uclass.c Merge branch 'next' of https://gitlab.denx.de/u-boot/custodians/u-boot-x86 into next 2019-12-18 07:20:19 -05:00
i2c-uniphier-f.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
i2c-uniphier.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
i2c-versatile.c i2c: Add support for the Arm's Versatile Express I2C controller. 2018-10-03 06:08:06 +02:00
ihs_i2c.c i2c: ihs: Improve error handling 2019-05-21 07:52:34 +02:00
imx_lpi2c.c i2c: imx_lpi2c: add ipg clk 2019-10-14 09:31:41 +02:00
intel_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
Kconfig i2c: remove i2c driver-model compatibility layer 2019-07-29 17:58:52 -04:00
kona_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
lpc32xx_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
Makefile i2c: designware: Tidy up PCI support 2019-12-15 11:44:08 +08:00
meson_i2c.c i2c: meson: add configurable divider factors 2019-04-10 16:50:02 +02:00
mv_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
mv_i2c.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
mvtwsi.c i2c: mvtwsi: fix reading status register after interrupt 2019-05-03 08:14:39 +02:00
mxc_i2c.c i2c: mxc: add CONFIG_CLK support 2019-09-02 06:35:08 +02:00
omap24xx_i2c.c i2c: omap24xx_i2c: Use platdata to probe the device 2018-12-10 06:11:18 +01:00
omap24xx_i2c.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
rcar_i2c.c i2c: rcar_i2c: Move FSDA check to rcar_i2c_recover 2019-03-08 05:53:40 +01:00
rcar_iic.c i2c: rcar_iic: Read ICSR only once 2019-03-07 06:20:09 +01:00
rk_i2c.c rockchip: i2c: don't sent stop bit after each message 2019-11-23 22:29:49 +08:00
s3c24x0_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
s3c24x0_i2c.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
sandbox_i2c.c dm: sandbox: i2c: Use new emulator parent uclass 2018-11-29 09:30:05 -07:00
sh_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
soft_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
stm32f7_i2c.c i2c: stm32f7_i2c: Fix warnings when compiling with W=1 2019-07-12 11:50:55 +02:00
tegra186_bpmp_i2c.c i2c: tegra: Fix regression by implementing a dummy probe_chip() callback 2018-12-12 06:06:14 +01:00
tegra_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
xilinx_xiic.c xilinx_xiic: Fix transfer initialisation 2019-07-09 07:02:11 +02:00