1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-sch311x.c b/drivers/gpio/gpio-sch311x.c
index faf44178f97b..1d2af9f97a91 100644
--- a/drivers/gpio/gpio-sch311x.c
+++ b/drivers/gpio/gpio-sch311x.c
@@ -235,6 +235,34 @@ static int sch311x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
         return !!(data & SCH311X_GPIO_CONF_DIR);
 }
 
+static int sch311x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
+                                   unsigned long config)
+{
+        struct sch311x_gpio_block *block = gpiochip_get_data(chip);
+        enum pin_config_param param = pinconf_to_config_param(config);
+        unsigned char data;
+
+        switch (param) {
+        case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+                spin_lock(&block->lock);
+                data = inb(block->runtime_reg + block->config_regs[offset]);
+                data |= SCH311X_GPIO_CONF_OPEN_DRAIN;
+                outb(data, block->runtime_reg + block->config_regs[offset]);
+                spin_unlock(&block->lock);
+                return 0;
+        case PIN_CONFIG_DRIVE_PUSH_PULL:
+                spin_lock(&block->lock);
+                data = inb(block->runtime_reg + block->config_regs[offset]);
+                data &= ~SCH311X_GPIO_CONF_OPEN_DRAIN;
+                outb(data, block->runtime_reg + block->config_regs[offset]);
+                spin_unlock(&block->lock);
+                return 0;
+        default:
+                break;
+        }
+        return -ENOTSUPP;
+}
+
 static int sch311x_gpio_probe(struct platform_device *pdev)
 {
         struct sch311x_pdev_data *pdata = dev_get_platdata(&pdev->dev);
@@ -268,6 +296,7 @@ static int sch311x_gpio_probe(struct platform_device *pdev)
                 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.set_config = sch311x_gpio_set_config;
                 block->chip.get = sch311x_gpio_get;
                 block->chip.set = sch311x_gpio_set;
                 block->chip.ngpio = 8;