[PATCH v2 03/23] sunxi: pinctrl: Implement get_pin_muxing function

Samuel Holland
2022-03-18T03:55:04Z

The pinmux command uses this function to display pinmux status.

Since the driver cannot map pin numbers to a list of supported
functions, only functions which are common across all pins can be
reported by name.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---

(no changes since v1)

drivers/pinctrl/sunxi/pinctrl-sunxi.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)

diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
index 6ea8245c8e..4e453cec54 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -82,6 +82,32 @@ static int sunxi_pinctrl_pinmux_set(struct udevice *dev, uint pin_selector,
return 0;
}

+static int sunxi_pinctrl_get_pin_muxing(struct udevice *dev, uint pin_selector,
+ char *buf, int size)
+{
+ struct sunxi_pinctrl_plat *plat = dev_get_plat(dev);
+ int bank = pin_selector / SUNXI_GPIOS_PER_BANK;
+ int pin = pin_selector % SUNXI_GPIOS_PER_BANK;
+ int mux = sunxi_gpio_get_cfgbank(plat->base + bank, pin);
+
+ switch (mux) {
+ case SUNXI_GPIO_INPUT:
+ strlcpy(buf, "gpio input", size);
+ break;
+ case SUNXI_GPIO_OUTPUT:
+ strlcpy(buf, "gpio output", size);
+ break;
+ case SUNXI_GPIO_DISABLE:
+ strlcpy(buf, "disabled", size);
+ break;
+ default:
+ snprintf(buf, size, "function %d", mux);
+ break;
+ }
+
+ return 0;
+}
+
static const struct pinctrl_ops sunxi_pinctrl_ops = {
.get_pins_count = sunxi_pinctrl_get_pins_count,
.get_pin_name = sunxi_pinctrl_get_pin_name,
@@ -89,6 +115,7 @@ static const struct pinctrl_ops sunxi_pinctrl_ops = {
.get_function_name = sunxi_pinctrl_get_function_name,
.pinmux_set = sunxi_pinctrl_pinmux_set,
.set_state = pinctrl_generic_set_state,
+ .get_pin_muxing = sunxi_pinctrl_get_pin_muxing,
};

static int sunxi_pinctrl_bind(struct udevice *dev)
--
2.33.1