summaryrefslogtreecommitdiff
path: root/drivers/gpio/gpiolib-of.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpio/gpiolib-of.c')
-rw-r--r--drivers/gpio/gpiolib-of.c34
1 files changed, 20 insertions, 14 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 9a0ec48a4..fa6e3c882 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -136,7 +136,6 @@ static struct gpio_desc *of_get_gpio_hog(struct device_node *np,
{
struct device_node *chip_np;
enum of_gpio_flags xlate_flags;
- struct gpio_desc *desc;
struct gg_data gg_data = {
.flags = &xlate_flags,
};
@@ -193,9 +192,7 @@ static struct gpio_desc *of_get_gpio_hog(struct device_node *np,
if (name && of_property_read_string(np, "line-name", name))
*name = np->name;
- desc = gg_data.out_gpio;
-
- return desc;
+ return gg_data.out_gpio;
}
/**
@@ -338,7 +335,7 @@ void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc)
EXPORT_SYMBOL(of_mm_gpiochip_remove);
#ifdef CONFIG_PINCTRL
-static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
+static int of_gpiochip_add_pin_range(struct gpio_chip *chip)
{
struct device_node *np = chip->of_node;
struct of_phandle_args pinspec;
@@ -349,7 +346,7 @@ static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
struct property *group_names;
if (!np)
- return;
+ return 0;
group_names = of_find_property(np, group_names_propname, NULL);
@@ -361,11 +358,11 @@ static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
pctldev = of_pinctrl_get(pinspec.np);
if (!pctldev)
- break;
+ return -EPROBE_DEFER;
if (pinspec.args[2]) {
if (group_names) {
- ret = of_property_read_string_index(np,
+ of_property_read_string_index(np,
group_names_propname,
index, &name);
if (strlen(name)) {
@@ -381,7 +378,7 @@ static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
pinspec.args[1],
pinspec.args[2]);
if (ret)
- break;
+ return ret;
} else {
/* npins == 0: special range */
if (pinspec.args[1]) {
@@ -411,32 +408,41 @@ static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
ret = gpiochip_add_pingroup_range(chip, pctldev,
pinspec.args[0], name);
if (ret)
- break;
+ return ret;
}
}
+
+ return 0;
}
#else
-static void of_gpiochip_add_pin_range(struct gpio_chip *chip) {}
+static int of_gpiochip_add_pin_range(struct gpio_chip *chip) { return 0; }
#endif
-void of_gpiochip_add(struct gpio_chip *chip)
+int of_gpiochip_add(struct gpio_chip *chip)
{
+ int status;
+
if ((!chip->of_node) && (chip->dev))
chip->of_node = chip->dev->of_node;
if (!chip->of_node)
- return;
+ return 0;
if (!chip->of_xlate) {
chip->of_gpio_n_cells = 2;
chip->of_xlate = of_gpio_simple_xlate;
}
- of_gpiochip_add_pin_range(chip);
+ status = of_gpiochip_add_pin_range(chip);
+ if (status)
+ return status;
+
of_node_get(chip->of_node);
of_gpiochip_scan_hogs(chip);
+
+ return 0;
}
void of_gpiochip_remove(struct gpio_chip *chip)