From 54d371cf73d9029a6adade3ec9423653d7790ef0 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 19 Nov 2019 17:36:48 +0200 Subject: 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 Signed-off-by: Andy Shevchenko Acked-by: Mika Westerberg --- drivers/pinctrl/intel/pinctrl-lynxpoint.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/pinctrl') 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; -- cgit v1.2.3