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| author | Heiko Schocher <hs@denx.de> | 2019-06-12 06:11:46 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2019-07-13 11:11:30 -0400 |
| commit | 5fc7cf8c8e268590f3b0037eecea7f6798209f78 (patch) | |
| tree | 73ec4655db11a32f1fe7a8495b9c42d81093de76 /include | |
| parent | 42f15397275c6341abbdbb7a2d1188992274c5bb (diff) | |
| download | u-boot-5fc7cf8c8e268590f3b0037eecea7f6798209f78.tar.gz u-boot-5fc7cf8c8e268590f3b0037eecea7f6798209f78.tar.xz u-boot-5fc7cf8c8e268590f3b0037eecea7f6798209f78.zip | |
gpio: add gpio-hog support
add gpio-hog support. GPIO hogging is a mechanism
providing automatic GPIO request and configuration
as part of the gpio-controller's driver probe function.
for more infos see:
doc/device-tree-bindings/gpio/gpio.txt
Signed-off-by: Heiko Schocher <hs@denx.de>
Tested-by: Michal Simek <michal.simek@xilinx.com> (zcu102)
Tested-by: Patrick Delaunay <patrick.delaunay@st.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/gpio.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index d03602696f..37f71e5708 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -349,6 +349,22 @@ const char *gpio_get_bank_info(struct udevice *dev, int *offset_count); int dm_gpio_lookup_name(const char *name, struct gpio_desc *desc); /** + * gpio_hog_lookup_name() - Look up a named GPIO and return the gpio descr. + * + * @name: Name to look up + * @return: Returns gpio_desc for gpio + */ +struct gpio_desc *gpio_hog_lookup_name(const char *name); + +/** + * gpio_hog_probe_all() - probe all gpio devices with + * gpio-hog subnodes. + * + * @return: Returns return value from device_probe() + */ +int gpio_hog_probe_all(void); + +/** * gpio_lookup_name - Look up a GPIO name and return its details * * This is used to convert a named GPIO into a device, offset and GPIO @@ -504,6 +520,22 @@ int gpio_request_list_by_name_nodev(ofnode node, const char *list_name, int flags); /** + * gpio_dev_request_index() - request single GPIO from gpio device + * + * @dev: GPIO device + * @nodename: Name of node + * @list_name: Name of GPIO list (e.g. "board-id-gpios") + * @index: Index number of the GPIO in that list use request (0=first) + * @flags: GPIOD_* flags + * @dtflags: GPIO flags read from DT + * @desc: GPIO descriotor filled from this function + * @return: return value from gpio_request_tail() + */ +int gpio_dev_request_index(struct udevice *dev, const char *nodename, + char *list_name, int index, int flags, + int dtflags, struct gpio_desc *desc); + +/** * dm_gpio_free() - Free a single GPIO * * This frees a single GPIOs previously returned from gpio_request_by_name(). |