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gpiolib: Convert fwnode_get_named_gpiod() to configure GPIO

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Make fwnode_get_named_gpiod() consistent with the rest of
gpiod_get() like API, i.e. configure GPIO pin immediately after
request.

Besides obvious clean up it will help to configure pins based
on firmware provided resources.

Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko
2017-01-09 16:02:28 +02:00
committed by Linus Walleij
parent 7ce7d89f48
commit a264d10ff4
7 changed files with 45 additions and 40 deletions
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20
drivers/gpio/gpiolib.c
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@@ -3309,6 +3309,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_index);
* fwnode_get_named_gpiod - obtain a GPIO from firmware node
* @fwnode: handle of the firmware node
* @propname: name of the firmware property representing the GPIO
* @dflags: GPIO initialization flags
*
* This function can be used for drivers that get their configuration
* from firmware.
@@ -3317,12 +3318,17 @@ EXPORT_SYMBOL_GPL(gpiod_get_index);
* underlying firmware interface and then makes sure that the GPIO
* descriptor is requested before it is returned to the caller.
*
* On successfull request the GPIO pin is configured in accordance with
* provided @dflags.
*
* In case of error an ERR_PTR() is returned.
*/
struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
const char *propname)
const char *propname,
enum gpiod_flags dflags)
{
struct gpio_desc *desc = ERR_PTR(-ENODEV);
unsigned long lflags = 0;
bool active_low = false;
bool single_ended = false;
int ret;
@@ -3355,13 +3361,19 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
return ERR_PTR(ret);
if (active_low)
set_bit(FLAG_ACTIVE_LOW, &desc->flags);
lflags |= GPIO_ACTIVE_LOW;
if (single_ended) {
if (active_low)
set_bit(FLAG_OPEN_DRAIN, &desc->flags);
lflags |= GPIO_OPEN_DRAIN;
else
set_bit(FLAG_OPEN_SOURCE, &desc->flags);
lflags |= GPIO_OPEN_SOURCE;
}
ret = gpiod_configure_flags(desc, propname, lflags, dflags);
if (ret < 0) {
gpiod_put(desc);
return ERR_PTR(ret);
}
return desc;