Add get_pin_muxing() which allows to display the muxing
of a given pin belonging to a pin-controller.
Signed-off-by: Patrice Chotard <patrice.chot...@st.com>
---
Changes in v4:
- Update get_pin_muxing() prototype by adding buffer and buffer's size
parameters.
Changes in v3:
- Replace const char **buf parameter by char *buf, int size parameters
for pinctrl_get_pin_muxing()
Changes in v2:
- Replace pinmux_show ops which displayed the complete pin-controller
muxing by get_pin_muxing ops which displays the muxing of one pin
drivers/pinctrl/pinctrl-uclass.c | 11 +++++++++++
include/dm/pinctrl.h | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 45 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c
index c38bb212ed74..3833dd2324f6 100644
--- a/drivers/pinctrl/pinctrl-uclass.c
+++ b/drivers/pinctrl/pinctrl-uclass.c
@@ -249,6 +249,17 @@ int pinctrl_get_gpio_mux(struct udevice *dev, int banknum,
int index)
return ops->get_gpio_mux(dev, banknum, index);
}
+int pinctrl_get_pin_muxing(struct udevice *dev, int selector, char *buf,
+ int size)
+{
+ struct pinctrl_ops *ops = pinctrl_get_ops(dev);
+
+ if (!ops->get_pin_muxing)
+ return -ENOSYS;
+
+ return ops->get_pin_muxing(dev, selector, buf, size);
+}
+
/**
* 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..e88438d6a5dc 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)
+ * @get_pin_muxing: display the muxing of a given pin.
*/
struct pinctrl_ops {
int (*get_pins_count)(struct udevice *dev);
@@ -129,6 +130,24 @@ 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);
+
+ /**
+ * get_pin_muxing() - show pin muxing
+ *
+ * This allows to display the muxing of a given pin. 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
+ * @selector: Pin selector
+ * @buf Pin's muxing description
+ * @size Pin's muxing description length
+ * return 0 if OK, -ve on error
+ */
+ int (*get_pin_muxing)(struct udevice *dev, unsigned int selector,
+ char *buf, int size);
};
#define pinctrl_get_ops(dev) ((struct pinctrl_ops *)(dev)->driver->ops)
@@ -348,4 +367,19 @@ int pinctrl_decode_pin_config(const void *blob, int node);
*/
int pinctrl_get_gpio_mux(struct udevice *dev, int banknum, int index);
+/**
+ * pinctrl_get_pin_muxing() - Returns the muxing description
+ *
+ * This allows to display the muxing description of the given pin for
+ * debug purpose
+ *
+ * @dev: Pinctrl device to use
+ * @selector Pin index within pin-controller
+ * @buf Pin's muxing description
+ * @size Pin's muxing description length
+ * @return 0 if OK, -ve on error
+ */
+int pinctrl_get_pin_muxing(struct udevice *dev, int selector, char *buf,
+ int size);
+
#endif /* __PINCTRL_H */
--
1.9.1
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