diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2016-04-09 22:53:39 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-04-14 15:03:27 +0300 |
| commit | 811a1882b12bbbcbd447ad8c4d16d170e196c58f (patch) | |
| tree | 28d67527a578012c121f32edc79ab9e10750b95a /drivers/gpio/gpio-menz127.c | |
| parent | f90c6bdb690bb12f3dbe8eaa5650a9ce952d0290 (diff) | |
| download | linux-811a1882b12bbbcbd447ad8c4d16d170e196c58f.tar.xz | |
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>
Diffstat (limited to 'drivers/gpio/gpio-menz127.c')
| -rw-r--r-- | drivers/gpio/gpio-menz127.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/gpio/gpio-menz127.c b/drivers/gpio/gpio-menz127.c index 8c1ab8e1974f..334fe270dcf1 100644 --- a/drivers/gpio/gpio-menz127.c +++ b/drivers/gpio/gpio-menz127.c @@ -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) { |