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Subject[PATCH/RFC 1/2] gpio: of: Extract of_gpiochip_add_hog()
Date
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>
---
drivers/gpio/gpiolib-of.c | 49 ++++++++++++++++++++++++++-------------
1 file changed, 33 insertions(+), 16 deletions(-)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index b696e4598a240ea4..dfae797846bb746b 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -625,6 +625,35 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
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
* @chip: gpio chip to act on
@@ -635,29 +664,17 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
*/
static int of_gpiochip_scan_gpios(struct gpio_chip *chip)
{
- struct gpio_desc *desc = NULL;
struct device_node *np;
- const char *name;
- unsigned long lflags;
- enum gpiod_flags dflags;
- unsigned int i;
int ret;

for_each_available_child_of_node(chip->of_node, np) {
if (!of_property_read_bool(np, "gpio-hog"))
continue;

- for (i = 0;; i++) {
- desc = of_parse_own_gpio(np, chip, i, &name, &lflags,
- &dflags);
- if (IS_ERR(desc))
- break;
-
- ret = gpiod_hog(desc, name, lflags, dflags);
- if (ret < 0) {
- of_node_put(np);
- return ret;
- }
+ ret = of_gpiochip_add_hog(chip, np);
+ if (ret < 0) {
+ of_node_put(np);
+ return ret;
}
}

--
2.17.1
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