[08/18] gpio: sch311x: Implement .get_direction()

Message ID 20180629063544.3826-8-linus.walleij@linaro.org
State New
Headers show
Series
  • [01/18] gpio: rc5t583: Include the right header
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Commit Message

Linus Walleij June 29, 2018, 6:35 a.m.
It's pretty simple to implement the .get_direction() for this
chip, so let's just do it.

Cc: Bruno Randolf <br1@einfach.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpio/gpio-sch311x.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Patch

diff --git a/drivers/gpio/gpio-sch311x.c b/drivers/gpio/gpio-sch311x.c
index 8bc2bf45e5da..ed64f7fa23b1 100644
--- a/drivers/gpio/gpio-sch311x.c
+++ b/drivers/gpio/gpio-sch311x.c
@@ -221,6 +221,18 @@  static int sch311x_gpio_direction_out(struct gpio_chip *chip, unsigned offset,
 	return 0;
 }
 
+static int sch311x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
+{
+	struct sch311x_gpio_block *block = gpiochip_get_data(chip);
+	unsigned char data;
+
+	spin_lock(&block->lock);
+	data = inb(block->runtime_reg + block->config_regs[offset]);
+	spin_unlock(&block->lock);
+
+	return !!(data & SCH311X_GPIO_CONF_IN);
+}
+
 static int sch311x_gpio_probe(struct platform_device *pdev)
 {
 	struct sch311x_pdev_data *pdata = dev_get_platdata(&pdev->dev);
@@ -253,6 +265,7 @@  static int sch311x_gpio_probe(struct platform_device *pdev)
 		block->chip.free = sch311x_gpio_free;
 		block->chip.direction_input = sch311x_gpio_direction_in;
 		block->chip.direction_output = sch311x_gpio_direction_out;
+		block->chip.get_direction = sch311x_gpio_get_direction;
 		block->chip.get = sch311x_gpio_get;
 		block->chip.set = sch311x_gpio_set;
 		block->chip.ngpio = 8;