diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-11-19 16:36:48 +0100 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-12-13 15:48:48 +0100 |
| commit | 54d371cf73d9029a6adade3ec9423653d7790ef0 (patch) | |
| tree | 2989d81ca80feb1d48a4afd38d92e0a4ff3a3f28 /drivers/pinctrl | |
| parent | pinctrl: lynxpoint: Implement ->irq_ack() callback (diff) | |
| download | linux-54d371cf73d9029a6adade3ec9423653d7790ef0.tar.xz linux-54d371cf73d9029a6adade3ec9423653d7790ef0.zip | |
pinctrl: lynxpoint: Implement intel_gpio_get_direction callback
Allows querying GPIO direction from the pad config register.
If the pad is not in GPIO mode, return an error.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-lynxpoint.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-lynxpoint.c b/drivers/pinctrl/intel/pinctrl-lynxpoint.c index 3b0dfe9a51ba..3c1b71204bbe 100644 --- a/drivers/pinctrl/intel/pinctrl-lynxpoint.c +++ b/drivers/pinctrl/intel/pinctrl-lynxpoint.c @@ -197,6 +197,16 @@ static int lp_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, return 0; } +static int lp_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + void __iomem *reg = lp_gpio_reg(chip, offset, LP_CONFIG1); + + if (ioread32(reg) & DIR_BIT) + return GPIO_LINE_DIRECTION_IN; + + return GPIO_LINE_DIRECTION_OUT; +} + static void lp_gpio_irq_handler(struct irq_desc *desc) { struct irq_data *data = irq_desc_get_irq_data(desc); @@ -391,6 +401,7 @@ static int lp_gpio_probe(struct platform_device *pdev) gc->direction_output = lp_gpio_direction_output; gc->get = lp_gpio_get; gc->set = lp_gpio_set; + gc->get_direction = lp_gpio_get_direction; gc->base = -1; gc->ngpio = LP_NUM_GPIO; gc->can_sleep = false; |