@@ -88,21 +88,25 @@ static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
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 @@ static int men_z127_probe(struct mcb_device *mdev,
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) {
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> --- drivers/gpio/gpio-menz127.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html