From: Oleksandr Suvorov oleksandr.suvorov@toradex.com
The FXL6408 GPIO expander manages critical devices, including on-module USB hub. Configure the expander to switch the USB hub into bypass mode, allowing to use on-carrier-board USB hub.
Signed-off-by: Oleksandr Suvorov cryosay@gmail.com Signed-off-by: Oleksandr Suvorov oleksandr.suvorov@foundries.io ---
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.
arch/arm/dts/fsl-imx8qxp-colibri.dts | 27 +++++++++++++++++++++++++++ configs/colibri-imx8x_defconfig | 1 + 2 files changed, 28 insertions(+)
diff --git a/arch/arm/dts/fsl-imx8qxp-colibri.dts b/arch/arm/dts/fsl-imx8qxp-colibri.dts index 11ece34c024..df992ac6396 100644 --- a/arch/arm/dts/fsl-imx8qxp-colibri.dts +++ b/arch/arm/dts/fsl-imx8qxp-colibri.dts @@ -129,6 +129,14 @@ >; };
+ /* On Module I2C */ + pinctrl_i2c0: i2c0grp { + fsl,pins = < + SC_P_MIPI_CSI0_GPIO0_00_ADMA_I2C0_SCL 0x06000021 + SC_P_MIPI_CSI0_GPIO0_01_ADMA_I2C0_SDA 0x06000021 + >; + }; + /* Off Module I2C */ pinctrl_i2c1: i2c1grp { fsl,pins = < @@ -298,6 +306,25 @@ }; };
+&i2c0 { + #address-cells = <1>; + #size-cells = <0>; + clock-frequency = <100000>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_i2c0>; + status = "okay"; + + /* GPIO expander */ + gpio_expander_43: gpio-expander@43 { + compatible = "fcs,fxl6408"; + gpio-controller; + #gpio-cells = <2>; + reg = <0x43>; + initial_io_dir = <0xff>; + initial_output = <0x05>; + }; +}; + &i2c1 { #address-cells = <1>; #size-cells = <0>; diff --git a/configs/colibri-imx8x_defconfig b/configs/colibri-imx8x_defconfig index 22bed95324a..a9b0f357163 100644 --- a/configs/colibri-imx8x_defconfig +++ b/configs/colibri-imx8x_defconfig @@ -41,6 +41,7 @@ CONFIG_TFTP_BLOCKSIZE=4096 CONFIG_TFTP_TSIZE=y CONFIG_CLK_IMX8=y CONFIG_CPU=y +CONFIG_FXL6408_GPIO=y CONFIG_MXC_GPIO=y CONFIG_DM_I2C=y CONFIG_SYS_I2C_IMX_LPI2C=y