diff options
Diffstat (limited to 'drivers/gpio/gpio-sch311x.c')
| -rw-r--r-- | drivers/gpio/gpio-sch311x.c | 29 |
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; |