Avoids gpiolib assumptions on initial pin direction, allowing user to observe
power-on settings.
---
drivers/gpio/gpio-f7188x.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c
index d59cccd..ec121a3 100644
--- a/drivers/gpio/gpio-f7188x.c
+++ b/drivers/gpio/gpio-f7188x.c
@@ -147,6 +147,7 @@ static void f7188x_write8(struct f7188x_sio *data, u8 reg,
u8 val)
* GPIO chip.
*/
+static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset);
static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);
static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
static int f7188x_gpio_direction_out(struct gpio_chip *chip,
@@ -158,6 +159,7 @@ static void f7188x_gpio_set(struct gpio_chip *chip,
unsigned offset, int value);
.chip = { \
.label = DRVNAME, \
.owner = THIS_MODULE, \
+ .get_direction = f7188x_gpio_get_direction, \
.direction_input = f7188x_gpio_direction_in, \
.get = f7188x_gpio_get, \
.direction_output = f7188x_gpio_direction_out, \
@@ -215,6 +217,20 @@ static struct f7188x_gpio_bank f71889_gpio_bank[] = {
F7188X_GPIO_BANK(70, 8, 0x80),
};
+static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
+{
+ struct f7188x_gpio_bank *bank =
+ container_of(chip, struct f7188x_gpio_bank, chip);
+ struct f7188x_sio *sio = bank->data->sio;
+ u8 dir;
+
+ mutex_lock(&sio->lock);
+ dir = f7188x_read8(sio, gpio_dir(bank->regbase));
+ mutex_unlock(&sio->lock);
+
+ return !(dir & 1 << offset);
+}
+
static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
{
struct f7188x_gpio_bank *bank =
--
2.5.0
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