Add get_pin_muxing() allows to display the muxing of a given pin belonging to a pin-controller
Signed-off-by: Patrice Chotard patrice.chotard@st.com ---
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 | 13 +++++++++++++ include/dm/pinctrl.h | 17 +++++++++++++++++ 2 files changed, 30 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c index c38bb212ed74..7671f1b551cb 100644 --- a/drivers/pinctrl/pinctrl-uclass.c +++ b/drivers/pinctrl/pinctrl-uclass.c @@ -249,6 +249,19 @@ 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, const char **buf) + +{ + struct pinctrl_ops *ops = pinctrl_get_ops(dev); + + if (!ops->get_pin_muxing) + return -ENOSYS; + + *buf = ops->get_pin_muxing(dev, selector); + + return 0; +} + /** * 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..34afdbb02238 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 +130,22 @@ 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 + * @return a string wich contains the muxing description + */ + const char *(*get_pin_muxing)(struct udevice *dev, + unsigned int selector); };
#define pinctrl_get_ops(dev) ((struct pinctrl_ops *)(dev)->driver->ops)