From: Linus Walleij <linus.walleij@linaro.org>
To: linux-gpio@vger.kernel.org, Alexandre Courbot <acourbot@nvidia.com>
Cc: Linus Walleij <linus.walleij@linaro.org>,
Peter Hung <hpeter@gmail.com>,
Andreas Bofjall <andreas@gazonk.org>,
Simon Guinot <simon.guinot@sequanux.org>
Subject: [PATCH 2/2] gpio: f7188x: use the new open drain callback
Date: Sat, 9 Apr 2016 16:13:32 +0200 [thread overview]
Message-ID: <1460211212-2808-1-git-send-email-linus.walleij@linaro.org> (raw)
The F7188x chips supports setting the pins in open drain mode.
Activate the new .set_single_ended() callback.
Cc: Peter Hung <hpeter@gmail.com>
Cc: Andreas Bofjall <andreas@gazonk.org>
Cc: Simon Guinot <simon.guinot@sequanux.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpio/gpio-f7188x.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c
index 8b10fbf787f8..75667afce387 100644
--- a/drivers/gpio/gpio-f7188x.c
+++ b/drivers/gpio/gpio-f7188x.c
@@ -130,6 +130,9 @@ static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
static int f7188x_gpio_direction_out(struct gpio_chip *chip,
unsigned offset, int value);
static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
+static int f7188x_gpio_set_single_ended(struct gpio_chip *gc,
+ unsigned offset,
+ enum single_ended_mode mode);
#define F7188X_GPIO_BANK(_base, _ngpio, _regbase) \
{ \
@@ -140,6 +143,7 @@ static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
.get = f7188x_gpio_get, \
.direction_output = f7188x_gpio_direction_out, \
.set = f7188x_gpio_set, \
+ .set_single_ended = f7188x_gpio_set_single_ended, \
.base = _base, \
.ngpio = _ngpio, \
.can_sleep = true, \
@@ -301,6 +305,35 @@ static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
superio_exit(sio->addr);
}
+static int f7188x_gpio_set_single_ended(struct gpio_chip *gc,
+ unsigned offset,
+ enum single_ended_mode mode)
+{
+ int err;
+ struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
+ struct f7188x_sio *sio = bank->data->sio;
+ u8 data;
+
+ if (mode != LINE_MODE_OPEN_DRAIN &&
+ mode != LINE_MODE_PUSH_PULL)
+ return -ENOTSUPP;
+
+ err = superio_enter(sio->addr);
+ if (err)
+ return err;
+ superio_select(sio->addr, SIO_LD_GPIO);
+
+ data = superio_inb(sio->addr, gpio_out_mode(bank->regbase));
+ if (mode == LINE_MODE_OPEN_DRAIN)
+ data &= ~BIT(offset);
+ else
+ data |= BIT(offset);
+ superio_outb(sio->addr, gpio_data_mode(bank->regbase), data);
+
+ superio_exit(sio->addr);
+ return 0;
+}
+
/*
* Platform device and driver.
*/
--
2.4.3
reply other threads:[~2016-04-09 14:13 UTC|newest]
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