From c54473cb25968be53e6b47527d5970b03a3cf41d Mon Sep 17 00:00:00 2001 From: Przemyslaw Marczak Date: Tue, 31 Mar 2015 18:57:18 +0200 Subject: 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 Acked-by: Simon Glass Added braces in i2c_gpio_xfer() to fix style nit: Signed-off-by: Simon Glass --- drivers/i2c/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/i2c/Kconfig') diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig index c83a984..739badc 100644 --- a/drivers/i2c/Kconfig +++ b/drivers/i2c/Kconfig @@ -19,6 +19,15 @@ config DM_I2C_COMPAT to convert all code for a board in a single commit. It should not be enabled for any board in an official release. +config DM_I2C_GPIO + bool "Enable Driver Model for software emulated I2C bus driver" + depends on DM_I2C && DM_GPIO + help + Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO + configuration is given by the device tree. Kernel-style device tree + bindings are supported. + Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt + config SYS_I2C_UNIPHIER bool "UniPhier I2C driver" depends on ARCH_UNIPHIER && DM_I2C -- cgit v1.1