[PATCH 09/11] pinctrl: single: add get_pin_name operation

[Dario Binacchi]

It returns the name of the requested pin.

Signed-off-by: Dario Binacchi <dariobin at libero.it>
---

 drivers/pinctrl/pinctrl-single.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index 21a3bbaaa7..04e2b00f7e 100644
--- a/drivers/pinctrl/pinctrl-single.c
+++ b/drivers/pinctrl/pinctrl-single.c
@@ -30,12 +30,14 @@ struct single_pdata {
  * struct single_priv - private data
  * @bits_per_pin: number of bits per pin
  * @npins: number of selectable pins
+ * @pin_name: temporary buffer to store the pin name
  * @read: function to read from a configuration register
  * @write: function to write to a configuration register
  */
 struct single_priv {
 	unsigned int bits_per_pin;
 	unsigned int npins;
+	char pin_name[PINNAME_SIZE];
 	unsigned int (*read)(fdt_addr_t reg);
 	void (*write)(unsigned int val, fdt_addr_t reg);
 };
@@ -207,6 +209,19 @@ static int single_set_state(struct udevice *dev,
 	return len;
 }
 
+static const char *single_get_pin_name(struct udevice *dev,
+				       unsigned int selector)
+{
+	struct single_priv *priv = dev_get_priv(dev);
+
+	if (selector >= priv->npins)
+		snprintf(priv->pin_name, PINNAME_SIZE, "Error");
+	else
+		snprintf(priv->pin_name, PINNAME_SIZE, "PIN%u", selector);
+
+	return priv->pin_name;
+}
+
 static int single_get_pins_count(struct udevice *dev)
 {
 	struct single_priv *priv = dev_get_priv(dev);
@@ -286,6 +301,7 @@ static int single_of_to_plat(struct udevice *dev)
 
 const struct pinctrl_ops single_pinctrl_ops = {
 	.get_pins_count	= single_get_pins_count,
+	.get_pin_name = single_get_pin_name,
 	.set_state = single_set_state,
 };
 
-- 
2.17.1