pinmux_show() allows to display the muxing of all pins
belonging to a pin-controller
Signed-off-by: Patrice Chotard <patrice.chot...@st.com>
---
drivers/pinctrl/pinctrl-uclass.c | 10 ++++++++++
include/dm/pinctrl.h | 29 +++++++++++++++++++++++++++++
2 files changed, 39 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c
index c38bb212ed74..24de7cc09d63 100644
--- a/drivers/pinctrl/pinctrl-uclass.c
+++ b/drivers/pinctrl/pinctrl-uclass.c
@@ -249,6 +249,16 @@ int pinctrl_get_gpio_mux(struct udevice *dev, int banknum,
int index)
return ops->get_gpio_mux(dev, banknum, index);
}
+int pinctrl_pinmux_show(struct udevice *dev)
+{
+ struct pinctrl_ops *ops = pinctrl_get_ops(dev);
+
+ if (!ops->pinmux_show)
+ return -ENOSYS;
+
+ return ops->pinmux_show(dev);
+}
+
/**
* pinconfig_post_bind() - post binding for PINCTRL uclass
* Recursively bind child nodes as pinconfig devices in case of full pinctrl.
diff --git a/include/dm/pinctrl.h b/include/dm/pinctrl.h
index 80de3f3fed2b..cbae7e1a640b 100644
--- a/include/dm/pinctrl.h
+++ b/include/dm/pinctrl.h
@@ -66,6 +66,7 @@ struct pinconf_param {
* pointing a config node. (necessary for pinctrl_full)
* @set_state_simple: do needed pinctrl operations for a peripherl @periph.
* (necessary for pinctrl_simple)
+ * @pinmux_show: display pin-controller's pin muxing.
*/
struct pinctrl_ops {
int (*get_pins_count)(struct udevice *dev);
@@ -129,6 +130,20 @@ struct pinctrl_ops {
* @return mux value (SoC-specific, e.g. 0 for input, 1 for output)
*/
int (*get_gpio_mux)(struct udevice *dev, int banknum, int index);
+
+ /**
+ * pinmux_show() - show pin-controller's pins muxing
+ *
+ * This allows to display all pin muxing configuration of a
+ * pin-controller. It's useful for debug purpose to know if a pin is
+ * configured as GPIO or as an alternate function and which one.
+ * Typically it is used by a PINCTRL driver with knowledge of the SoC
+ * pinctrl setup.
+ *
+ * @dev: Pinctrl device to use
+ * @return 0 if OK, -ve on error
+ */
+ int (*pinmux_show)(struct udevice *dev);
};
#define pinctrl_get_ops(dev) ((struct pinctrl_ops *)(dev)->driver->ops)
@@ -348,4 +363,18 @@ int pinctrl_decode_pin_config(const void *blob, int node);
*/
int pinctrl_get_gpio_mux(struct udevice *dev, int banknum, int index);
+/**
+ * pinctrl_pinmux_show() - display pin-controller pins muxing
+ *
+ * This allows the raw mux value for a GPIO to be obtained. It is
+ * useful for displaying the function being used by that GPIO, such
+ * as with the 'gpio' command. This function is internal to the GPIO
+ * subsystem and should not be used by generic code. Typically it is
+ * used by a GPIO driver with knowledge of the SoC pinctrl setup.
+ *
+ * @dev: Pinctrl device to use
+ * @return 0 if OK, -ve on error
+ */
+int pinctrl_pinmux_show(struct udevice *dev);
+
#endif /* __PINCTRL_H */
--
1.9.1
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