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a40fe217d1
u-boot-brain/drivers/i2c
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Lukasz Majewski a40fe217d1 DM: I2C: Introduce 'u-boot, i2c-transaction-bytes' property 
The 'u-boot,i2c-transaction-bytes' device tree property provides
information regarding number of bytes transferred by a device in a
single transaction.

This change is necessary to avoid hanging devices after soft reset.
One notable example is communication with MC34708 device:

1. Reset when communicating with MC34708 via I2C.

2. The u-boot (after reboot -f) tries to setup the I2C and then calls
force_idle_bus. In the same time MC34708 still has some data to be sent
(as it transfers data in 24 bits chunks).

3. The force_idle_bus() is not able to make the bus idle as 8 SCL
clocks may be not enough to have the full transmission.

4. We end up with I2C inconsistency with MC34708.

This PMIC device requires 24+ SCL cycles to make finish any pending I2C
transmission.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-04-11 15:21:33 +02:00
..
muxes i2c: mux: Generate longer i2c mux name 2019-02-11 09:38:23 +01:00
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.c i2c: designware: Add error checking on init 2019-02-20 15:21:44 +08:00
designware_i2c.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
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 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
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 below warnings with checker tool 2019-03-21 08:21:43 +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-compat.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
i2c-uclass.c DM: I2C: Introduce 'u-boot, i2c-transaction-bytes' property 2019-04-11 15:21:33 +02:00
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 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
imx_lpi2c.c i2c: imx_lpi2c: fix typo and register base address format 2018-10-22 14:35:57 +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 Kconfig: tegra: Migrate SYS_I2C_TEGRA 2019-02-20 09:01:44 -07:00
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: Remove ancient zynq_i2c driver 2019-02-14 14:31:10 +01:00
meson_i2c.c meson: use the clock driver 2018-06-19 07:31:47 -04:00
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: disable i2c slave on Armada 38x 2018-06-07 14:19:55 +02:00
mxc_i2c.c DM: I2C: Introduce 'u-boot, i2c-transaction-bytes' property 2019-04-11 15:21:33 +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: enable i2c controller for rk3066 and rk3188 2018-07-21 01:55:25 +02:00
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: change setup struct to const 2018-11-16 16:51:58 -05:00
tegra_i2c.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
tegra186_bpmp_i2c.c i2c: tegra: Fix regression by implementing a dummy probe_chip() callback 2018-12-12 06:06:14 +01:00
xilinx_xiic.c i2c: xiic: Add Xilinx AXI I2C driver 2019-01-15 09:04:49 +01:00