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gpio: of: Extract of_gpiochip_add_hog() 

Extract the code to add all GPIO hogs of a gpio-hog node into its own
function, so it can be reused.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200220130149.26283-2-geert+renesas@glider.be
Reviewed-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Geert Uytterhoeven 2020-02-20 14:01:48 +01:00 committed by Linus Walleij
parent f8850206e1
commit bc21077e08
1 changed files with 33 additions and 16 deletions
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49
drivers/gpio/gpiolib-of.c
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@ -604,6 +604,35 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
return desc; return desc;
} }
/**
* of_gpiochip_add_hog - Add all hogs in a hog device node
* @chip: gpio chip to act on
* @hog: device node describing the hogs
*
* Returns error if it fails otherwise 0 on success.
*/
static int of_gpiochip_add_hog(struct gpio_chip *chip, struct device_node *hog)
{
enum gpiod_flags dflags;
struct gpio_desc *desc;
unsigned long lflags;
const char *name;
unsigned int i;
int ret;
for (i = 0;; i++) {
desc = of_parse_own_gpio(hog, chip, i, &name, &lflags, &dflags);
if (IS_ERR(desc))
break;
ret = gpiod_hog(desc, name, lflags, dflags);
if (ret < 0)
return ret;
}
return 0;
}
/** /**
* of_gpiochip_scan_gpios - Scan gpio-controller for gpio definitions * of_gpiochip_scan_gpios - Scan gpio-controller for gpio definitions
* @chip: gpio chip to act on * @chip: gpio chip to act on
@ -614,29 +643,17 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
*/ */
static int of_gpiochip_scan_gpios(struct gpio_chip *chip) static int of_gpiochip_scan_gpios(struct gpio_chip *chip)
{ {
struct gpio_desc *desc = NULL;
struct device_node *np; struct device_node *np;
const char *name;
unsigned long lflags;
enum gpiod_flags dflags;
unsigned int i;
int ret; int ret;
for_each_available_child_of_node(chip->of_node, np) { for_each_available_child_of_node(chip->of_node, np) {
if (!of_property_read_bool(np, "gpio-hog")) if (!of_property_read_bool(np, "gpio-hog"))
continue; continue;
for (i = 0;; i++) { ret = of_gpiochip_add_hog(chip, np);
desc = of_parse_own_gpio(np, chip, i, &name, &lflags, if (ret < 0) {
&dflags); of_node_put(np);
if (IS_ERR(desc)) return ret;
break;
ret = gpiod_hog(desc, name, lflags, dflags);
if (ret < 0) {
of_node_put(np);
return ret;
}
} }
} }