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-rw-r--r--drivers/gpio/gpio-wm831x.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-wm831x.c b/drivers/gpio/gpio-wm831x.c
index 18cb0f534b91..41ec7834059a 100644
--- a/drivers/gpio/gpio-wm831x.c
+++ b/drivers/gpio/gpio-wm831x.c
@@ -132,6 +132,28 @@ static int wm831x_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
return wm831x_set_bits(wm831x, reg, WM831X_GPN_FN_MASK, fn);
}
+static int wm831x_set_single_ended(struct gpio_chip *chip,
+ unsigned int offset,
+ enum single_ended_mode mode)
+{
+ struct wm831x_gpio *wm831x_gpio = gpiochip_get_data(chip);
+ struct wm831x *wm831x = wm831x_gpio->wm831x;
+ int reg = WM831X_GPIO1_CONTROL + offset;
+
+ switch (mode) {
+ case LINE_MODE_OPEN_DRAIN:
+ return wm831x_set_bits(wm831x, reg,
+ WM831X_GPN_OD_MASK, WM831X_GPN_OD);
+ case LINE_MODE_PUSH_PULL:
+ return wm831x_set_bits(wm831x, reg,
+ WM831X_GPN_OD_MASK, 0);
+ default:
+ break;
+ }
+
+ return -ENOTSUPP;
+}
+
#ifdef CONFIG_DEBUG_FS
static void wm831x_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
@@ -216,7 +238,7 @@ static void wm831x_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
pull,
powerdomain,
reg & WM831X_GPN_POL ? "" : " inverted",
- reg & WM831X_GPN_OD ? "open-drain" : "CMOS",
+ reg & WM831X_GPN_OD ? "open-drain" : "push-pull",
tristated ? " tristated" : "",
reg);
}
@@ -234,6 +256,7 @@ static struct gpio_chip template_chip = {
.set = wm831x_gpio_set,
.to_irq = wm831x_gpio_to_irq,
.set_debounce = wm831x_gpio_set_debounce,
+ .set_single_ended = wm831x_set_single_ended,
.dbg_show = wm831x_gpio_dbg_show,
.can_sleep = true,
};