gpio: menz127: use the new open drain callback
The menz127 driver tries to support open drain by detecting it
at request time. However: without the new callbacks from the
gpiolib it is not really working: the core will still just emulate
the open drain mode by switching the line to an input.
By adding a hook into the new .set_single_ended() call rather than
trying to autodetect at request() time, proper open drain can be
supported.
Cc: Andreas Werner <andy@wernerandy.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-menz127.c b/drivers/gpio/gpio-menz127.c
index 8c1ab8e..334fe27 100644
--- a/drivers/gpio/gpio-menz127.c
+++ b/drivers/gpio/gpio-menz127.c
@@ -88,21 +88,25 @@
return 0;
}
-static int men_z127_request(struct gpio_chip *gc, unsigned gpio_pin)
+static int men_z127_set_single_ended(struct gpio_chip *gc,
+ unsigned offset,
+ enum single_ended_mode mode)
{
struct men_z127_gpio *priv = gpiochip_get_data(gc);
u32 od_en;
- if (gpio_pin >= gc->ngpio)
- return -EINVAL;
+ if (mode != LINE_MODE_OPEN_DRAIN &&
+ mode != LINE_MODE_PUSH_PULL)
+ return -ENOTSUPP;
spin_lock(&priv->lock);
od_en = readl(priv->reg_base + MEN_Z127_ODER);
- if (gpiochip_line_is_open_drain(gc, gpio_pin))
- od_en |= BIT(gpio_pin);
+ if (mode == LINE_MODE_OPEN_DRAIN)
+ od_en |= BIT(offset);
else
- od_en &= ~BIT(gpio_pin);
+ /* Implicitly LINE_MODE_PUSH_PULL */
+ od_en &= ~BIT(offset);
writel(od_en, priv->reg_base + MEN_Z127_ODER);
spin_unlock(&priv->lock);
@@ -147,7 +151,7 @@
goto err_unmap;
men_z127_gpio->gc.set_debounce = men_z127_debounce;
- men_z127_gpio->gc.request = men_z127_request;
+ men_z127_gpio->gc.set_single_ended = men_z127_set_single_ended;
ret = gpiochip_add_data(&men_z127_gpio->gc, men_z127_gpio);
if (ret) {