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pinctrl: oxnas: Add GPIO get_direction 

Implement a get_direction callback for the OXNAS GPIO driver in order
to have pin output polarity in debugfs and new userspace ABI.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Neil Armstrong 2016-05-24 12:03:24 +02:00 committed by Linus Walleij
parent 2df723d49c
commit 2f94ced704
1 changed files with 11 additions and 0 deletions
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11
drivers/pinctrl/pinctrl-oxnas.c
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@ -49,6 +49,7 @@
/* GPIO Registers */
#define INPUT_VALUE 0x00
#define OUTPUT_EN 0x04
#define IRQ_PENDING 0x0c
#define OUTPUT_SET 0x14
#define OUTPUT_CLEAR 0x18
@ -431,6 +432,15 @@ static int oxnas_gpio_request_enable(struct pinctrl_dev *pctldev,
return 0;
}
static int oxnas_gpio_get_direction(struct gpio_chip *chip,
unsigned int offset)
{
struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);
u32 mask = BIT(offset);
return !(readl_relaxed(bank->reg_base + OUTPUT_EN) & mask);
}
static int oxnas_gpio_direction_input(struct gpio_chip *chip,
unsigned int offset)
{
@ -664,6 +674,7 @@ static void oxnas_gpio_irq_handler(struct irq_desc *desc)
.label = "GPIO" #_bank, \
.request = gpiochip_generic_request, \
.free = gpiochip_generic_free, \
.get_direction = oxnas_gpio_get_direction, \
.direction_input = oxnas_gpio_direction_input, \
.direction_output = oxnas_gpio_direction_output, \
.get = oxnas_gpio_get, \