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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