From d4b388244abfb7580a00967147fc5e45baf2f41f Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel@sholland.org>
Date: Tue, 17 Aug 2021 00:52:00 -0500
Subject: [PATCH] sunxi: pinctrl: Implement get_pin_muxing function
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>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
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 fe6c46cdd5..789cfbacbb 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -92,6 +92,32 @@ 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,
@@ -99,6 +125,7 @@ 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)
--
2.39.5