PM / devfreq: rk3399_dmc: rename driver and internals to rockchip

[firefly-linux-kernel-4.4.55.git] / drivers / gpio / gpiolib.c

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 2a91f3287e3b7e52f2f6e16d108af07d4343be0b..06d345b087f878a67d2352b85ddb7454e2c6167b 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -927,14 +927,6 @@ static int __gpiod_request(struct gpio_desc *desc, const char *label)
                spin_lock_irqsave(&gpio_lock, flags);
        }
 done:
-       if (status < 0) {
-               /* Clear flags that might have been set by the caller before
-                * requesting the GPIO.
-                */
-               clear_bit(FLAG_ACTIVE_LOW, &desc->flags);
-               clear_bit(FLAG_OPEN_DRAIN, &desc->flags);
-               clear_bit(FLAG_OPEN_SOURCE, &desc->flags);
-       }
        spin_unlock_irqrestore(&gpio_lock, flags);
        return status;
 }
@@ -1279,7 +1271,13 @@ static int _gpiod_get_raw_value(const struct gpio_desc *desc)
        chip = desc->chip;
        offset = gpio_chip_hwgpio(desc);
        value = chip->get ? chip->get(chip, offset) : -EIO;
-       value = value < 0 ? value : !!value;
+       /*
+        * FIXME: fix all drivers to clamp to [0,1] or return negative,
+        * then change this to:
+        * value = value < 0 ? value : !!value;
+        * so we can properly propagate error codes.
+        */
+       value = !!value;
        trace_gpio_value(desc_to_gpio(desc), 1, value);
        return value;
 }
@@ -2056,28 +2054,13 @@ struct gpio_desc *__must_check gpiod_get_optional(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(gpiod_get_optional);
 
-/**
- * gpiod_parse_flags - helper function to parse GPIO lookup flags
- * @desc:      gpio to be setup
- * @lflags:    gpio_lookup_flags - returned from of_find_gpio() or
- *             of_get_gpio_hog()
- *
- * Set the GPIO descriptor flags based on the given GPIO lookup flags.
- */
-static void gpiod_parse_flags(struct gpio_desc *desc, unsigned long lflags)
-{
-       if (lflags & GPIO_ACTIVE_LOW)
-               set_bit(FLAG_ACTIVE_LOW, &desc->flags);
-       if (lflags & GPIO_OPEN_DRAIN)
-               set_bit(FLAG_OPEN_DRAIN, &desc->flags);
-       if (lflags & GPIO_OPEN_SOURCE)
-               set_bit(FLAG_OPEN_SOURCE, &desc->flags);
-}
 
 /**
  * gpiod_configure_flags - helper function to configure a given GPIO
  * @desc:      gpio whose value will be assigned
  * @con_id:    function within the GPIO consumer
+ * @lflags:    gpio_lookup_flags - returned from of_find_gpio() or
+ *             of_get_gpio_hog()
  * @dflags:    gpiod_flags - optional GPIO initialization flags
  *
  * Return 0 on success, -ENOENT if no GPIO has been assigned to the
@@ -2085,10 +2068,17 @@ static void gpiod_parse_flags(struct gpio_desc *desc, unsigned long lflags)
  * occurred while trying to acquire the GPIO.
  */
 static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
-                                enum gpiod_flags dflags)
+               unsigned long lflags, enum gpiod_flags dflags)
 {
        int status;
 
+       if (lflags & GPIO_ACTIVE_LOW)
+               set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+       if (lflags & GPIO_OPEN_DRAIN)
+               set_bit(FLAG_OPEN_DRAIN, &desc->flags);
+       if (lflags & GPIO_OPEN_SOURCE)
+               set_bit(FLAG_OPEN_SOURCE, &desc->flags);
+
        /* No particular flag request, return here... */
        if (!(dflags & GPIOD_FLAGS_BIT_DIR_SET)) {
                pr_debug("no flags found for %s\n", con_id);
@@ -2155,13 +2145,11 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
                return desc;
        }
 
-       gpiod_parse_flags(desc, lookupflags);
-
        status = gpiod_request(desc, con_id);
        if (status < 0)
                return ERR_PTR(status);
 
-       status = gpiod_configure_flags(desc, con_id, flags);
+       status = gpiod_configure_flags(desc, con_id, lookupflags, flags);
        if (status < 0) {
                dev_dbg(dev, "setup of GPIO %s failed\n", con_id);
                gpiod_put(desc);
@@ -2217,6 +2205,10 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
        if (IS_ERR(desc))
                return desc;
 
+       ret = gpiod_request(desc, NULL);
+       if (ret)
+               return ERR_PTR(ret);
+
        if (active_low)
                set_bit(FLAG_ACTIVE_LOW, &desc->flags);
 
@@ -2227,10 +2219,6 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
                        set_bit(FLAG_OPEN_SOURCE, &desc->flags);
        }
 
-       ret = gpiod_request(desc, NULL);
-       if (ret)
-               return ERR_PTR(ret);
-
        return desc;
 }
 EXPORT_SYMBOL_GPL(fwnode_get_named_gpiod);
@@ -2283,8 +2271,6 @@ int gpiod_hog(struct gpio_desc *desc, const char *name,
        chip = gpiod_to_chip(desc);
        hwnum = gpio_chip_hwgpio(desc);
 
-       gpiod_parse_flags(desc, lflags);
-
        local_desc = gpiochip_request_own_desc(chip, hwnum, name);
        if (IS_ERR(local_desc)) {
                pr_err("requesting hog GPIO %s (chip %s, offset %d) failed\n",
@@ -2292,7 +2278,7 @@ int gpiod_hog(struct gpio_desc *desc, const char *name,
                return PTR_ERR(local_desc);
        }
 
-       status = gpiod_configure_flags(desc, name, dflags);
+       status = gpiod_configure_flags(desc, name, lflags, dflags);
        if (status < 0) {
                pr_err("setup of hog GPIO %s (chip %s, offset %d) failed\n",
                       name, chip->label, hwnum);