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authorMika Westerberg <mika.westerberg@linux.intel.com>2013-10-10 11:01:09 +0300
committerLinus Walleij <linus.walleij@linaro.org>2013-10-19 23:31:37 +0200
commit81f59e9d138c3ba0bd0f97d4e14f856d987e3f1d (patch)
tree5f7eaefa918749407da0958a97096eba56a42500 /drivers/gpio
parent936e15dd2128eb5aa71251766f1176552b45f43c (diff)
downloadlinux-81f59e9d138c3ba0bd0f97d4e14f856d987e3f1d.tar.bz2
gpiolib / ACPI: add ACPI support for gpiod_get_index()
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@linux.intel.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpiolib.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 9263c7b359b7..bee93c8c2361 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>
@@ -2260,6 +2261,12 @@ static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_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)
{
@@ -2361,6 +2368,9 @@ 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);