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Diffstat (limited to 'include/linux/gpio/consumer.h')
-rw-r--r--include/linux/gpio/consumer.h81
1 files changed, 65 insertions, 16 deletions
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 05e53ccb708b..b7ce0c64c6f3 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -18,30 +18,79 @@ struct gpio_desc;
#ifdef CONFIG_GPIOLIB
+#define GPIOD_FLAGS_BIT_DIR_SET BIT(0)
+#define GPIOD_FLAGS_BIT_DIR_OUT BIT(1)
+#define GPIOD_FLAGS_BIT_DIR_VAL BIT(2)
+
+/**
+ * Optional flags that can be passed to one of gpiod_* to configure direction
+ * and output value. These values cannot be OR'd.
+ */
+enum gpiod_flags {
+ GPIOD_ASIS = 0,
+ GPIOD_IN = GPIOD_FLAGS_BIT_DIR_SET,
+ GPIOD_OUT_LOW = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT,
+ GPIOD_OUT_HIGH = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
+ GPIOD_FLAGS_BIT_DIR_VAL,
+};
+
/* Acquire and dispose GPIOs */
-struct gpio_desc *__must_check gpiod_get(struct device *dev,
- const char *con_id);
-struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check __gpiod_get(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+#define __gpiod_get(dev, con_id, flags, ...) __gpiod_get(dev, con_id, flags)
+#define gpiod_get(varargs...) __gpiod_get(varargs, 0)
+struct gpio_desc *__must_check __gpiod_get_index(struct device *dev,
const char *con_id,
- unsigned int idx);
-struct gpio_desc *__must_check gpiod_get_optional(struct device *dev,
- const char *con_id);
-struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev,
+ unsigned int idx,
+ enum gpiod_flags flags);
+#define __gpiod_get_index(dev, con_id, index, flags, ...) \
+ __gpiod_get_index(dev, con_id, index, flags)
+#define gpiod_get_index(varargs...) __gpiod_get_index(varargs, 0)
+struct gpio_desc *__must_check __gpiod_get_optional(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+#define __gpiod_get_optional(dev, con_id, flags, ...) \
+ __gpiod_get_optional(dev, con_id, flags)
+#define gpiod_get_optional(varargs...) __gpiod_get_optional(varargs, 0)
+struct gpio_desc *__must_check __gpiod_get_index_optional(struct device *dev,
const char *con_id,
- unsigned int index);
+ unsigned int index,
+ enum gpiod_flags flags);
+#define __gpiod_get_index_optional(dev, con_id, index, flags, ...) \
+ __gpiod_get_index_optional(dev, con_id, index, flags)
+#define gpiod_get_index_optional(varargs...) \
+ __gpiod_get_index_optional(varargs, 0)
void gpiod_put(struct gpio_desc *desc);
-struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,
- const char *con_id);
-struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check __devm_gpiod_get(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+#define __devm_gpiod_get(dev, con_id, flags, ...) \
+ __devm_gpiod_get(dev, con_id, flags)
+#define devm_gpiod_get(varargs...) __devm_gpiod_get(varargs, 0)
+struct gpio_desc *__must_check __devm_gpiod_get_index(struct device *dev,
const char *con_id,
- unsigned int idx);
-struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev,
- const char *con_id);
+ unsigned int idx,
+ enum gpiod_flags flags);
+#define __devm_gpiod_get_index(dev, con_id, index, flags, ...) \
+ __devm_gpiod_get_index(dev, con_id, index, flags)
+#define devm_gpiod_get_index(varargs...) __devm_gpiod_get_index(varargs, 0)
+struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+#define __devm_gpiod_get_optional(dev, con_id, flags, ...) \
+ __devm_gpiod_get_optional(dev, con_id, flags)
+#define devm_gpiod_get_optional(varargs...) \
+ __devm_gpiod_get_optional(varargs, 0)
struct gpio_desc *__must_check
-devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
- unsigned int index);
+__devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
+ unsigned int index, enum gpiod_flags flags);
+#define __devm_gpiod_get_index_optional(dev, con_id, index, flags, ...) \
+ __devm_gpiod_get_index_optional(dev, con_id, index, flags)
+#define devm_gpiod_get_index_optional(varargs...) \
+ __devm_gpiod_get_index_optional(varargs, 0)
void devm_gpiod_put(struct device *dev, struct gpio_desc *desc);