gpio: Add helpers for optional GPIOs

[platform/adaptation/renesas_rcar/renesas_kernel.git] / include / linux / gpio / consumer.h

diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 7a8144f..6a37ef0 100644 (file)
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -5,7 +5,6 @@
 #include <linux/kernel.h>
 
 struct device;
-struct gpio_chip;
 
 /**
  * Opaque descriptor for a GPIO. These are obtained using gpiod_get() and are
@@ -24,6 +23,12 @@ struct gpio_desc *__must_check gpiod_get(struct device *dev,
 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,
+                                                       const char *con_id,
+                                                       unsigned int index);
+
 void gpiod_put(struct gpio_desc *desc);
 
 struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,
@@ -31,11 +36,18 @@ struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,
 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);
+struct gpio_desc *__must_check
+devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
+                             unsigned int index);
+
 void devm_gpiod_put(struct device *dev, struct gpio_desc *desc);
 
 int gpiod_get_direction(const struct gpio_desc *desc);
 int gpiod_direction_input(struct gpio_desc *desc);
 int gpiod_direction_output(struct gpio_desc *desc, int value);
+int gpiod_direction_output_raw(struct gpio_desc *desc, int value);
 
 /* Value get/set from non-sleeping context */
 int gpiod_get_value(const struct gpio_desc *desc);
@@ -59,7 +71,6 @@ int gpiod_to_irq(const struct gpio_desc *desc);
 /* Convert between the old gpio_ and new gpiod_ interfaces */
 struct gpio_desc *gpio_to_desc(unsigned gpio);
 int desc_to_gpio(const struct gpio_desc *desc);
-struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);
 
 #else /* CONFIG_GPIOLIB */
 
@@ -74,6 +85,20 @@ static inline struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
 {
        return ERR_PTR(-ENOSYS);
 }
+
+static inline struct gpio_desc *__must_check
+gpiod_get_optional(struct device *dev, const char *con_id)
+{
+       return ERR_PTR(-ENOSYS);
+}
+
+static inline struct gpio_desc *__must_check
+gpiod_get_index_optional(struct device *dev, const char *con_id,
+                        unsigned int index)
+{
+       return ERR_PTR(-ENOSYS);
+}
+
 static inline void gpiod_put(struct gpio_desc *desc)
 {
        might_sleep();
@@ -94,6 +119,20 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
 {
        return ERR_PTR(-ENOSYS);
 }
+
+static inline struct gpio_desc *__must_check
+devm_gpiod_get_optional(struct device *dev, const char *con_id)
+{
+       return ERR_PTR(-ENOSYS);
+}
+
+static inline struct gpio_desc *__must_check
+devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
+                             unsigned int index)
+{
+       return ERR_PTR(-ENOSYS);
+}
+
 static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc)
 {
        might_sleep();
@@ -121,6 +160,12 @@ static inline int gpiod_direction_output(struct gpio_desc *desc, int value)
        WARN_ON(1);
        return -ENOSYS;
 }
+static inline int gpiod_direction_output_raw(struct gpio_desc *desc, int value)
+{
+       /* GPIO can never have been requested */
+       WARN_ON(1);
+       return -ENOSYS;
+}
 
 
 static inline int gpiod_get_value(const struct gpio_desc *desc)
@@ -207,12 +252,6 @@ static inline int desc_to_gpio(const struct gpio_desc *desc)
        WARN_ON(1);
        return -EINVAL;
 }
-static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)
-{
-       /* GPIO can never have been requested */
-       WARN_ON(1);
-       return ERR_PTR(-ENODEV);
-}
 
 
 #endif /* CONFIG_GPIOLIB */