pinctrl: pass name instead of device to pin_config_*

Obtaining a "struct pinctrl_dev *" is difficult for code not directly
related to the pinctrl subsystem. However, the device name of the pinctrl
device is fairly well known. So, modify pin_config_*() to take the device
name instead of the "struct pinctrl_dev *".

Signed-off-by: Stephen Warren <swarren@nvidia.com>
[rebased on top of refactoring code]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 32 insertions, 9 deletions

diff --git a/drivers/pinctrl/pinconf.c b/drivers/pinctrl/pinconf.c
index 124762b57024..57dbb4b478db 100644
--- a/drivers/pinctrl/pinconf.c
+++ b/drivers/pinctrl/pinconf.c
@@ -39,17 +39,22 @@ int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin,
 
 /**
  * pin_config_get() - get the configuration of a single pin parameter
- * @pctldev: pin controller device for this pin
+ * @dev_name: name of the pin controller device for this pin
  * @name: name of the pin to get the config for
  * @config: the config pointed to by this argument will be filled in with the
  *      current pin state, it can be used directly by drivers as a numeral, or
  *      it can be dereferenced to any struct.
  */
-int pin_config_get(struct pinctrl_dev *pctldev, const char *name,
+int pin_config_get(const char *dev_name, const char *name,
                           unsigned long *config)
 {
+        struct pinctrl_dev *pctldev;
         int pin;
 
+        pctldev = get_pinctrl_dev_from_dev(NULL, dev_name);
+        if (!pctldev)
+                return -EINVAL;
+
         pin = pin_get_from_name(pctldev, name);
         if (pin < 0)
                 return pin;
@@ -82,17 +87,22 @@ int pin_config_set_for_pin(struct pinctrl_dev *pctldev, unsigned pin,
 
 /**
  * pin_config_set() - set the configuration of a single pin parameter
- * @pctldev: pin controller device for this pin
+ * @dev_name: name of pin controller device for this pin
  * @name: name of the pin to set the config for
  * @config: the config in this argument will contain the desired pin state, it
  *      can be used directly by drivers as a numeral, or it can be dereferenced
  *      to any struct.
  */
-int pin_config_set(struct pinctrl_dev *pctldev, const char *name,
+int pin_config_set(const char *dev_name, const char *name,
                    unsigned long config)
 {
+        struct pinctrl_dev *pctldev;
         int pin;
 
+        pctldev = get_pinctrl_dev_from_dev(NULL, dev_name);
+        if (!pctldev)
+                return -EINVAL;
+
         pin = pin_get_from_name(pctldev, name);
         if (pin < 0)
                 return pin;
@@ -101,12 +111,18 @@ int pin_config_set(struct pinctrl_dev *pctldev, const char *name,
 }
 EXPORT_SYMBOL(pin_config_set);
 
-int pin_config_group_get(struct pinctrl_dev *pctldev, const char *pin_group,
+int pin_config_group_get(const char *dev_name, const char *pin_group,
                          unsigned long *config)
 {
-        const struct pinconf_ops *ops = pctldev->desc->confops;
+        struct pinctrl_dev *pctldev;
+        const struct pinconf_ops *ops;
         int selector;
 
+        pctldev = get_pinctrl_dev_from_dev(NULL, dev_name);
+        if (!pctldev)
+                return -EINVAL;
+        ops = pctldev->desc->confops;
+
         if (!ops || !ops->pin_config_group_get) {
                 dev_err(pctldev->dev, "cannot get configuration for pin "
                         "group, missing group config get function in "
@@ -123,17 +139,24 @@ int pin_config_group_get(struct pinctrl_dev *pctldev, const char *pin_group,
 EXPORT_SYMBOL(pin_config_group_get);
 
 
-int pin_config_group_set(struct pinctrl_dev *pctldev, const char *pin_group,
+int pin_config_group_set(const char *dev_name, const char *pin_group,
                          unsigned long config)
 {
-        const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
-        const struct pinconf_ops *ops = pctldev->desc->confops;
+        struct pinctrl_dev *pctldev;
+        const struct pinconf_ops *ops;
+        const struct pinctrl_ops *pctlops;
         int selector;
         const unsigned *pins;
         unsigned num_pins;
         int ret;
         int i;
 
+        pctldev = get_pinctrl_dev_from_dev(NULL, dev_name);
+        if (!pctldev)
+                return -EINVAL;
+        ops = pctldev->desc->confops;
+        pctlops = pctldev->desc->pctlops;
+
         if (!ops || (!ops->pin_config_group_set && !ops->pin_config_set)) {
                 dev_err(pctldev->dev, "cannot configure pin group, missing "
                         "config function in driver\n");