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gpio: fixes for gpio-hog support

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recently added gpio hog patch was "in discussion"
state with Simon Glass. This patch now adds most
of comments from Simon Glass.

Signed-off-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Heiko Schocher
2019-07-17 06:59:51 +02:00
committed by Tom Rini
parent 5917d0b877
commit 49b10cb492
5 changed files with 95 additions and 41 deletions
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12
include/asm-generic/gpio.h
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@@ -352,9 +352,10 @@ 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
* @desc: Returns GPIO description, on success, else NULL
* @return: Returns 0 if OK, else -ENODEV
*/
struct gpio_desc *gpio_hog_lookup_name(const char *name);
int gpio_hog_lookup_name(const char *name, struct gpio_desc **desc);
/**
* gpio_hog_probe_all() - probe all gpio devices with
@@ -523,12 +524,13 @@ int gpio_request_list_by_name_nodev(ofnode node, const char *list_name,
* gpio_dev_request_index() - request single GPIO from gpio device
*
* @dev: GPIO device
* @nodename: Name of node
* @nodename: Name of node for which gpio gets requested, used
* for the gpio label name
* @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
* @dtflags: GPIO flags read from DT defined see GPIOD_*
* @desc: returns GPIO descriptor filled from this function
* @return: return value from gpio_request_tail()
*/
int gpio_dev_request_index(struct udevice *dev, const char *nodename,