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path: root/drivers/gpio/gpio-xgene.c
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Diffstat (limited to 'drivers/gpio/gpio-xgene.c')
-rw-r--r--drivers/gpio/gpio-xgene.c30
1 files changed, 22 insertions, 8 deletions
diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c
index 0dc916191689..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);
@@ -189,6 +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;
@@ -216,19 +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);