gpiolib: use dedicated flags for GPIO properties

GPIO mapping properties were defined using the GPIOF_* flags, which are
declared in linux/gpio.h. This file is not included when using the
GPIO descriptor interface.

This patch declares the flags that can be used as GPIO mappings
properties in linux/gpio/driver.h, and uses them in gpiolib, so that no
deprecated declarations are used by the GPIO descriptor interface.

This patch also allows GPIO_OPEN_DRAIN and GPIO_OPEN_SOURCE to be
specified as GPIO mapping properties.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index d8938b9b794aeab2a0b717691aae864da47b7941..490198365ce47810ae75c558cb753acb8cc2a7e8 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -14,6 +14,7 @@
 #include <linux/idr.h>
 #include <linux/slab.h>
 #include <linux/acpi.h>
+#include <linux/gpio/driver.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/gpio.h>
@@ -2274,7 +2275,8 @@ void gpiod_add_table(struct gpiod_lookup *table, size_t size)
 
 #ifdef CONFIG_OF
 static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
-                                     unsigned int idx, unsigned long *flags)
+                                     unsigned int idx,
+                                     enum gpio_lookup_flags *flags)
 {
        char prop_name[32]; /* 32 is max size of property name */
        enum of_gpio_flags of_flags;
@@ -2292,7 +2294,7 @@ static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
                return desc;
 
        if (of_flags & OF_GPIO_ACTIVE_LOW)
-               *flags |= GPIOF_ACTIVE_LOW;
+               *flags |= GPIO_ACTIVE_LOW;
 
        return desc;
 }
@@ -2305,7 +2307,8 @@ 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)
+                                       unsigned int idx,
+                                       enum gpio_lookup_flags *flags)
 {
        struct acpi_gpio_info info;
        struct gpio_desc *desc;
@@ -2315,13 +2318,14 @@ static struct gpio_desc *acpi_find_gpio(struct device *dev, const char *con_id,
                return desc;
 
        if (info.gpioint && info.active_low)
-               *flags |= GPIOF_ACTIVE_LOW;
+               *flags |= GPIO_ACTIVE_LOW;
 
        return desc;
 }
 
 static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id,
-                                   unsigned int idx, unsigned long *flags)
+                                   unsigned int idx,
+                                   enum gpio_lookup_flags *flags)
 {
        const char *dev_id = dev ? dev_name(dev) : NULL;
        struct gpio_desc *desc = ERR_PTR(-ENODEV);
@@ -2413,7 +2417,7 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
 {
        struct gpio_desc *desc;
        int status;
-       unsigned long flags = 0;
+       enum gpio_lookup_flags flags = 0;
 
        dev_dbg(dev, "GPIO lookup for consumer %s\n", con_id);
 
@@ -2439,8 +2443,12 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
        if (status < 0)
                return ERR_PTR(status);
 
-       if (flags & GPIOF_ACTIVE_LOW)
+       if (flags & GPIO_ACTIVE_LOW)
                set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+       if (flags & GPIO_OPEN_DRAIN)
+               set_bit(FLAG_OPEN_DRAIN, &desc->flags);
+       if (flags & GPIO_OPEN_SOURCE)
+               set_bit(FLAG_OPEN_SOURCE, &desc->flags);
 
        return desc;
 }

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 656a27efb2c8cdd755cd78e20a36e5dd028e5310..82eac610ce1a77ba944ee99d4afe6c921690b3c5 100644 (file)
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -125,6 +125,13 @@ extern struct gpio_chip *gpiochip_find(void *data,
 int gpiod_lock_as_irq(struct gpio_desc *desc);
 void gpiod_unlock_as_irq(struct gpio_desc *desc);
 
+enum gpio_lookup_flags {
+       GPIO_ACTIVE_HIGH = (0 << 0),
+       GPIO_ACTIVE_LOW = (1 << 0),
+       GPIO_OPEN_DRAIN = (1 << 1),
+       GPIO_OPEN_SOURCE = (1 << 2),
+};
+
 /**
  * Lookup table for associating GPIOs to specific devices and functions using
  * platform data.
@@ -152,9 +159,9 @@ struct gpiod_lookup {
         */
        unsigned int idx;
        /*
-        * mask of GPIOF_* values
+        * mask of GPIO_* values
         */
-       unsigned long flags;
+       enum gpio_lookup_flags flags;
 };
 
 /*