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dd3c1602cf
u-boot-brain/drivers/i2c
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Simon Glass dd3c1602cf i2c: designware_i2c: Use an accurate bus clock instead of MHz 
At present the driver uses an approximation for the bus clock, e.g. 166MHz
instead of 166 2/3 MHz.

This can result in small errors in the resulting I2C speed, perhaps 0.5%
or so.

Adjust the existing code to start from the accurate figure, even if later
rounding reduces this accuracy.

Update the bus speed code to work in KHz instead of MHz, which removes
most of the error.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27 07:20:27 +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: Add Apollo Lake support 2019-12-15 11:44:27 +08:00
designware_i2c.c i2c: designware_i2c: Use an accurate bus clock instead of MHz 2020-01-27 07:20:27 +01:00
designware_i2c.h i2c: designware_i2c: Use an accurate bus clock instead of MHz 2020-01-27 07:20:27 +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