Add support of the Fairchild's FXL6408 i2c gpio expander and enable this driver for Toradex Colibri iMX8QXP SoM.
Changes in v4: - fix misuse of MF_ID_x instead of FW_REV_x in fxl6408_probe(). - fix kernel doc formatting. - sort headers. - fix hex numbers style. - explicitly claim values of enum io_direction. - simplify fxl6408_get_function(). - make variable naming better in fxl6408_probe().
Changes in v3: - fix a warning: "drivers/gpio/gpio-fxl6408.c:348:15: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘int’ [-Wformat=]" - add Tested-by record.
Changes in v2: - Kconfig: add better description for the config option. - gpio-fxl6408.c: -- improve registers' naming. -- fix code style (comments, etc.). -- reimplement fxl6408_read() reducing number of parameters. -- change return value of fxl6408_is_output() to bool. -- replace IS_ERR_VALUE() macros with simple x < 0 where it's possible. -- fxl6408_set_direction(): fix type of parameter "dir". -- fix return error codes to avoid using the predefined in the driver model ones. -- removed extra debug code. -- expand TODO list.
Oleksandr Suvorov (2): GPIO: fxl6408: Add support for FXL6408 GPIO expander colibri-imx8x: add on-module gpio expander fxl6408
arch/arm/dts/fsl-imx8qxp-colibri.dts | 27 ++ configs/colibri-imx8x_defconfig | 1 + drivers/gpio/Kconfig | 7 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-fxl6408.c | 380 +++++++++++++++++++++++++++ 5 files changed, 416 insertions(+) create mode 100644 drivers/gpio/gpio-fxl6408.c