diff options
Diffstat (limited to 'drivers/gpio/gpio-xgene.c')
| -rw-r--r-- | drivers/gpio/gpio-xgene.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c index c0aa387664bf..40a8881c2ce8 100644 --- a/drivers/gpio/gpio-xgene.c +++ b/drivers/gpio/gpio-xgene.c @@ -17,7 +17,7 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ -#include <linux/module.h> +#include <linux/acpi.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/io.h> @@ -85,6 +85,17 @@ static void xgene_gpio_set(struct gpio_chip *gc, unsigned int offset, int val) spin_unlock_irqrestore(&chip->lock, flags); } +static int xgene_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) +{ + struct xgene_gpio *chip = gpiochip_get_data(gc); + unsigned long bank_offset, bit_offset; + + bank_offset = GPIO_SET_DR_OFFSET + GPIO_BANK_OFFSET(offset); + bit_offset = GPIO_BIT_OFFSET(offset); + + return !!(ioread32(chip->base + bank_offset) & BIT(bit_offset)); +} + static int xgene_gpio_dir_in(struct gpio_chip *gc, unsigned int offset) { struct xgene_gpio *chip = gpiochip_get_data(gc); @@ -173,6 +184,11 @@ static int xgene_gpio_probe(struct platform_device *pdev) } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + err = -EINVAL; + goto err; + } + gpio->base = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res)); if (!gpio->base) { @@ -184,6 +200,7 @@ static int xgene_gpio_probe(struct platform_device *pdev) spin_lock_init(&gpio->lock); gpio->chip.parent = &pdev->dev; + gpio->chip.get_direction = xgene_gpio_get_direction; gpio->chip.direction_input = xgene_gpio_dir_in; gpio->chip.direction_output = xgene_gpio_dir_out; gpio->chip.get = xgene_gpio_get; @@ -211,19 +228,21 @@ static const struct of_device_id xgene_gpio_of_match[] = { { .compatible = "apm,xgene-gpio", }, {}, }; -MODULE_DEVICE_TABLE(of, xgene_gpio_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id xgene_gpio_acpi_match[] = { + { "APMC0D14", 0 }, + { }, +}; +#endif static struct platform_driver xgene_gpio_driver = { .driver = { .name = "xgene-gpio", .of_match_table = xgene_gpio_of_match, + .acpi_match_table = ACPI_PTR(xgene_gpio_acpi_match), .pm = XGENE_GPIO_PM_OPS, }, .probe = xgene_gpio_probe, }; - -module_platform_driver(xgene_gpio_driver); - -MODULE_AUTHOR("Feng Kan <fkan@apm.com>"); -MODULE_DESCRIPTION("APM X-Gene GPIO driver"); -MODULE_LICENSE("GPL"); +builtin_platform_driver(xgene_gpio_driver); |
