Commit 85b02bc0 authored by Stefan Wahren's avatar Stefan Wahren Committed by Linus Walleij
Browse files

pinctrl: bcm2835: Implement bcm2835_pinconf_get 



Even the driver already has implemented pin_dbg_show, it could
be helpful to implement pin_conf_get for a more generic behavior.
Contrary to the BCM2711, the BCM2835 SOC doesn't allow to read
the bias config, so the implementation is limited to the basics.

Keep ENOTSUPP here, because it's only used internally.

Signed-off-by: default avatarStefan Wahren <wahrenst@gmx.net>
Reviewed-by: default avatarChen-Yu Tsai <wens@csie.org>
Message-ID: <20240307070113.4888-2-wahrenst@gmx.net>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 76c22f09

drivers/pinctrl/bcm/pinctrl-bcm2835.c

+21 −2
Original line number Diff line number Diff line
@@ -1003,10 +1003,29 @@ static const struct pinmux_ops bcm2835_pmx_ops = { 
static int bcm2835_pinconf_get(struct pinctrl_dev *pctldev,

			unsigned pin, unsigned long *config)

{

	/* No way to read back config in HW */

	enum pin_config_param param = pinconf_to_config_param(*config);

	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);

	enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, pin);

	u32 val;



	/* No way to read back bias config in HW */



	switch (param) {

	case PIN_CONFIG_OUTPUT:

		if (fsel != BCM2835_FSEL_GPIO_OUT)

			return -EINVAL;



		val = bcm2835_gpio_get_bit(pc, GPLEV0, pin);

		*config = pinconf_to_config_packed(param, val);

		break;



	default:

		return -ENOTSUPP;

	}



	return 0;

}



static void bcm2835_pull_config_set(struct bcm2835_pinctrl *pc,

		unsigned int pin, unsigned int arg)

{