gpiod_get_index() and gpiod_get() are now the new preferred way to request
GPIOs. Add support for finding the corresponding GPIO descriptor from ACPI
namespace.
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
drivers/gpio/gpiolib.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index e2a2cdd..1e099de 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -10,6 +10,7 @@
#include <linux/seq_file.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
+#include <linux/acpi_gpio.h>
#include <linux/idr.h>
#include <linux/slab.h>
@@ -2111,6 +2112,12 @@ static struct gpio_desc *of_find_gpio(struct device *dev, const char *id,
}
#endif
+static struct gpio_desc *acpi_find_gpio(struct device *dev, const char *con_id,
+ unsigned int idx, unsigned long *flags)
+{
+ return acpi_get_gpiod_by_index(dev, idx, NULL);
+}
+
static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id,
unsigned int idx, unsigned long *flags)
{
@@ -2192,6 +2199,9 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node) {
dev_dbg(dev, "using device tree for GPIO lookup\n");
desc = of_find_gpio(dev, con_id, idx, &flags);
+ } else if (IS_ENABLED(CONFIG_ACPI) && dev && ACPI_HANDLE(dev)) {
+ dev_dbg(dev, "using ACPI for GPIO lookup\n");
+ desc = acpi_find_gpio(dev, con_id, idx, &flags);
} else {
dev_dbg(dev, "using lookup tables for GPIO lookup");
desc = gpiod_find(dev, con_id, idx, &flags);
--
1.8.4.rc3
--
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