I have added the following to the am335x-boneblack.dts:
&am33xx_pinmux {
pinctrl-names = "default";
pinctrl-0 = <&gpio_pins>;
status = "okay";
};
Now it works as expected.
2020. június 25., csütörtök 15:26:00 UTC+2 időpontban droland a következőt
írta:
>
> Hello,
>
> I have a linux 5.4 custom build (by BuildRoot) for BeagleBone Black. There
> is no device-tree overlay and cape manager...
> I need some inputs and outputs so I should create a patch for the
> am335x-boneblack-common.dtsi
> <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/am335x-boneblack-common.dtsi?h=v5.4>
>
> file (and probably for am335x-boneblack.dts
> <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/am335x-boneblack.dts?h=v5.4>
>
> too) that's way I have added some lines to am335x-boneblack-commom.dtsi
> into the "&am33xx_pinmux" section:
>
> &am33xx_pinmux {
>
>
> ...
>
>
> gpio_pins: pinmux_gpio_pins {
> pinctrl-single,pins = <
> AM33XX_PADCONF(AM335X_PIN_MCASP0_FSR, PIN_OUTPUT, MUX_MODE7) /*
> control pin1 */
> AM33XX_PADCONF(AM335X_PIN_GPMC_A1, PIN_OUTPUT, MUX_MODE7) /*
> control pin2 */
>
> AM33XX_PADCONF(AM335X_PIN_GPMC_OEN_REN, PIN_INPUT_PULLUP,
> MUX_MODE7) /* SW1 */
> AM33XX_PADCONF(AM335X_PIN_GPMC_ADVN_ALE, PIN_INPUT_PULLUP,
> MUX_MODE7) /* SW2 */
> AM33XX_PADCONF(AM335X_PIN_GPMC_WEN, PIN_INPUT_PULLUP,
> MUX_MODE7) /* SW3 */
> AM33XX_PADCONF(AM335X_PIN_GPMC_BEN0_CLE, PIN_INPUT_PULLUP,
> MUX_MODE7) /* SW4 */
>
> AM33XX_PADCONF(AM335X_PIN_GPMC_CSN0, PIN_INPUT_PULLUP,
> MUX_MODE7) /* Rev0 */
> AM33XX_PADCONF(AM335X_PIN_GPMC_CLK, PIN_INPUT_PULLUP,
> MUX_MODE7) /* Rev1 */
>
> AM33XX_PADCONF(AM335X_PIN_GPMC_AD10, PIN_INPUT_PULLUP,
> MUX_MODE7) /* input1 */
> AM33XX_PADCONF(AM335X_PIN_GPMC_AD15, PIN_INPUT_PULLUP,
> MUX_MODE7) /* input2 */
> AM33XX_PADCONF(AM335X_PIN_GPMC_AD14, PIN_INPUT_PULLUP,
> MUX_MODE7) /* input3 */
> AM33XX_PADCONF(AM335X_PIN_GPMC_AD11, PIN_INPUT_PULLUP,
> MUX_MODE7) /* input4 */
> >;
> };
>
> };
>
>
> It has no effect. The "input pull up" does not work. I have read a lot of
> articles and projects, but I don't know how I should do it.I have stucked
> here.
>
> Please help me with an example or any other way to make those inputs and
> outputs work .
>
> Thank you in advance.
>
>
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