Hello Drew, On Mon, May 30, 2022 at 12:55 AM Drew Fustini <drew@xxxxxxxxxxxxxxx> wrote: > > On Fri, May 27, 2022 at 1:01 PM Yegor Yefremov > <yegorslists@xxxxxxxxxxxxxx> wrote: > > > > I have the following problem. The latest kernel version I am using for > > my devices is 5.4.x. In my DTS I don't explicitly expose the GPIOs to > > the usespace but I can read input both via sysfs as also libgpiod API. > > > > With the newest kernel like 5.17 or 5.18, I can read the same input > > pin but I always read 0. I have also tried to add my GPIOs as > > "default" into the am33xx_pinmux section (the way it is done in [1]) but > > it didn't help. > > > > [1] https://patchwork.kernel.org/project/linux-omap/patch/20200712103717.1219765-1-drew@xxxxxxxxxxxxxxx/ > > > > Regards, > > Yegor > > Hello Yegor, > > Which am335x board are you using? Is it the PocketBeagle? > > Have you tried reverting abe4e4675dfc ("ARM: dts: am335x-pocketbeagle: > set default mux for gpio pins") to see if the results change? > > Please post the dts files you created or modified so I can better > familiarize myself with your environment. > > Unfortunately, I'm currently traveling with only a BeagleBone Black, > but it might be useful for testing depending on what the issue is. This is a diff to the DTS of our board Baltos ir5221: diff --git a/arch/arm/boot/dts/am335x-baltos-ir5221.dts b/arch/arm/boot/dts/am335x-baltos-ir5221.dts index 2f3872dbf4f4..f596cc60e9c0 100644 --- a/arch/arm/boot/dts/am335x-baltos-ir5221.dts +++ b/arch/arm/boot/dts/am335x-baltos-ir5221.dts @@ -18,6 +18,19 @@ }; &am33xx_pinmux { + compatible = "pinconf-single"; + pinctrl-names = "default"; + + pinctrl-0 = < &wifi_switch>; + + wifi_switch: pinmux_wifi_switch { + pinctrl-single,pins = < + AM33XX_PADCONF(AM335X_PIN_SPI0_CS1, PIN_INPUT_PULLUP, MUX_MODE7) /* spi0_cs1.gpio0[6] wifi switch */ + >; + pinctrl-single,bias-pullup = < 0x10 0x10 0x00 0x18>; + pinctrl-single,bias-pulldown = < 0x10 0x00 0x10 0x18>; + }; + tca6416_pins: pinmux_tca6416_pins { pinctrl-single,pins = < AM33XX_PADCONF(AM335X_PIN_XDMA_EVENT_INTR1, PIN_INPUT_PULLUP, MUX_MODE7) /* xdma_event_intr1.gpio0[20] tca6416 stuff */ This is my related kernel configuration: # zcat /proc/config.gz | grep "PINCTRL\|PINCONF" CONFIG_PINCTRL=y CONFIG_GENERIC_PINCTRL_GROUPS=y CONFIG_PINCONF=y CONFIG_GENERIC_PINCONF=y CONFIG_DEBUG_PINCTRL=y # CONFIG_PINCTRL_MCP23S08 is not set # CONFIG_PINCTRL_MICROCHIP_SGPIO is not set # CONFIG_PINCTRL_OCELOT is not set # CONFIG_PINCTRL_PALMAS is not set CONFIG_PINCTRL_SINGLE=y # CONFIG_PINCTRL_STMFX is not set # CONFIG_PINCTRL_SX150X is not set CONFIG_PINCTRL_TI_IODELAY=y This command should deliver "1": # gpioget gpiochip0 6 [ 55.371155] gpio gpiochip0: Persistence not supported for GPIO 6 [ 55.377503] gpio gpiochip0: registered chardev handle for line 6 [ 55.383611] gpio gpiochip0: registered chardev handle for 1 lines 0 Regards, Yegor
