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pinctrl: stm32: Implement .get_direction gpio_chip callback 

Add .get_direction() gpiochip callback in STM32 pinctrl driver.

Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Alexandre TORGUE 2017-05-29 18:17:32 +02:00 committed by Linus Walleij
parent 9efa6d1a1e
commit acaa037970
2 changed files with 25 additions and 3 deletions
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23
drivers/pinctrl/stm32/pinctrl-stm32.c
View File

@ -209,6 +209,24 @@ static int stm32_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
return irq_create_fwspec_mapping(&fwspec);
}
static int stm32_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
{
struct stm32_gpio_bank *bank = gpiochip_get_data(chip);
int pin = stm32_gpio_pin(offset);
int ret;
u32 mode, alt;
stm32_pmx_get_mode(bank, pin, &mode, &alt);
if ((alt == 0) && (mode == 0))
ret = 1;
else if ((alt == 0) && (mode == 1))
ret = 0;
else
ret = -EINVAL;
return ret;
}
static const struct gpio_chip stm32_gpio_template = {
.request = stm32_gpio_request,
.free = stm32_gpio_free,
@ -217,6 +235,7 @@ static const struct gpio_chip stm32_gpio_template = {
.direction_input = stm32_gpio_direction_input,
.direction_output = stm32_gpio_direction_output,
.to_irq = stm32_gpio_to_irq,
.get_direction = stm32_gpio_get_direction,
};
static int stm32_gpio_irq_request_resources(struct irq_data *irq_data)
@ -577,8 +596,8 @@ static void stm32_pmx_set_mode(struct stm32_gpio_bank *bank,
clk_disable(bank->clk);
}
static void stm32_pmx_get_mode(struct stm32_gpio_bank *bank,
int pin, u32 *mode, u32 *alt)
void stm32_pmx_get_mode(struct stm32_gpio_bank *bank, int pin, u32 *mode,
u32 *alt)
{
u32 val;
int alt_shift = (pin % 8) * 4;

5
drivers/pinctrl/stm32/pinctrl-stm32.h
View File

@ -45,7 +45,10 @@ struct stm32_pinctrl_match_data {
const unsigned int npins;
};
int stm32_pctl_probe(struct platform_device *pdev);
struct stm32_gpio_bank;
int stm32_pctl_probe(struct platform_device *pdev);
void stm32_pmx_get_mode(struct stm32_gpio_bank *bank,
int pin, u32 *mode, u32 *alt);
#endif /* __PINCTRL_STM32_H */