dm: pinctrl: Add pinctrl_get_pin_name and pinctrl_get_pins_count

Add pinctrl_get_pin_name() and pinctrl_get_pins_count() methods
to obtain pin's name and pin's muxing given a pin reference.

This will be used by the new pinmux command.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/dm/pinctrl.h b/include/dm/pinctrl.h
index e88438d..5a7c5f1 100644
--- a/include/dm/pinctrl.h
+++ b/include/dm/pinctrl.h
@@ -382,4 +382,26 @@
 int pinctrl_get_pin_muxing(struct udevice *dev, int selector, char *buf,
 			   int size);
 
+/**
+ * pinctrl_get_pins_count() - display pin-controller pins number
+ *
+ * This allows to know the number of pins owned by a given pin-controller
+ *
+ * @dev:	Pinctrl device to use
+ * @return pins number if OK, -ve on error
+ */
+int pinctrl_get_pins_count(struct udevice *dev);
+
+/**
+ * pinctrl_get_pin_name() - Returns the pin's name
+ *
+ * This allows to display the pin's name for debug purpose
+ *
+ * @dev:	Pinctrl device to use
+ * @selector	Pin index within pin-controller
+ * @buf		Pin's name
+ * @return 0 if OK, -ve on error
+ */
+int pinctrl_get_pin_name(struct udevice *dev, int selector, char *buf,
+			 int size);
 #endif /* __PINCTRL_H */