diff options
| author | Marek Vasut <marek.vasut+renesas@gmail.com> | 2019-04-21 23:57:23 +0200 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2019-05-04 19:26:49 +0200 |
| commit | ae59d7ca59dbfc770531f51c717dc6f5d9a18f78 (patch) | |
| tree | 085d88b860d48e92aa9ed290a80e391cb9044162 /include/dm | |
| parent | 175f5027345c7feaa41e8f4201778814bf72fe37 (diff) | |
pinctrl: gpio: Add callback for configuring pin as GPIO
Add callback to configure, and de-configure, pin as a GPIO on the
pin controller side. This matches similar functionality in Linux
and aims to replace the ad-hoc implementations present in U-Boot.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Alex Kiernan <alex.kiernan@gmail.com>
Cc: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Cc: Eugeniu Rosca <roscaeugeniu@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick DELAUNAY <patrick.delaunay@st.com>
Cc: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Cc: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/dm')
| -rw-r--r-- | include/dm/pinctrl.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/include/dm/pinctrl.h b/include/dm/pinctrl.h index 63a7d55b88..e7b8ad9078 100644 --- a/include/dm/pinctrl.h +++ b/include/dm/pinctrl.h @@ -70,6 +70,13 @@ struct pinconf_param { * @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. + * @gpio_request_enable: requests and enables GPIO on a certain pin. + * Implement this only if you can mux every pin individually as GPIO. The + * affected GPIO range is passed along with an offset(pin number) into that + * specific GPIO range - function selectors and pin groups are orthogonal + * to this, the core will however make sure the pins do not collide. + * @gpio_disable_free: free up GPIO muxing on a certain pin, the reverse of + * @gpio_request_enable */ struct pinctrl_ops { int (*get_pins_count)(struct udevice *dev); @@ -151,6 +158,24 @@ struct pinctrl_ops { */ int (*get_pin_muxing)(struct udevice *dev, unsigned int selector, char *buf, int size); + + /** + * gpio_request_enable: requests and enables GPIO on a certain pin. + * + * @dev: Pinctrl device to use + * @selector: Pin selector + * return 0 if OK, -ve on error + */ + int (*gpio_request_enable)(struct udevice *dev, unsigned int selector); + + /** + * gpio_disable_free: free up GPIO muxing on a certain pin. + * + * @dev: Pinctrl device to use + * @selector: Pin selector + * return 0 if OK, -ve on error + */ + int (*gpio_disable_free)(struct udevice *dev, unsigned int selector); }; #define pinctrl_get_ops(dev) ((struct pinctrl_ops *)(dev)->driver->ops) @@ -407,4 +432,23 @@ int pinctrl_get_pins_count(struct udevice *dev); */ int pinctrl_get_pin_name(struct udevice *dev, int selector, char *buf, int size); + +/** + * pinctrl_gpio_request() - request a single pin to be used as GPIO + * + * @dev: GPIO peripheral device + * @offset: the GPIO pin offset from the GPIO controller + * @return: 0 on success, or negative error code on failure + */ +int pinctrl_gpio_request(struct udevice *dev, unsigned offset); + +/** + * pinctrl_gpio_free() - free a single pin used as GPIO + * + * @dev: GPIO peripheral device + * @offset: the GPIO pin offset from the GPIO controller + * @return: 0 on success, or negative error code on failure + */ +int pinctrl_gpio_free(struct udevice *dev, unsigned offset); + #endif /* __PINCTRL_H */ |