6 files changed, 127 insertions, 12 deletions

diff --git a/include/linux/of.h b/include/linux/of.h
index fa7fb1d97458..2ec1083af7ff 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -193,6 +193,17 @@ extern struct device_node *of_get_next_child(const struct device_node *node,
         for (child = of_get_next_child(parent, NULL); child != NULL; \
              child = of_get_next_child(parent, child))
 
+static inline int of_get_child_count(const struct device_node *np)
+{
+        struct device_node *child;
+        int num = 0;
+
+        for_each_child_of_node(np, child)
+                num++;
+
+        return num;
+}
+
 extern struct device_node *of_find_node_with_property(
         struct device_node *from, const char *prop_name);
 #define for_each_node_with_property(dn, prop_name) \
@@ -259,6 +270,37 @@ extern void of_detach_node(struct device_node *);
 #endif
 
 #define of_match_ptr(_ptr)      (_ptr)
+
+/*
+ * struct property *prop;
+ * const __be32 *p;
+ * u32 u;
+ *
+ * of_property_for_each_u32(np, "propname", prop, p, u)
+ *         printk("U32 value: %x\n", u);
+ */
+const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
+                               u32 *pu);
+#define of_property_for_each_u32(np, propname, prop, p, u)      \
+        for (prop = of_find_property(np, propname, NULL),       \
+                p = of_prop_next_u32(prop, NULL, &u);           \
+                p;                                              \
+                p = of_prop_next_u32(prop, p, &u))
+
+/*
+ * struct property *prop;
+ * const char *s;
+ *
+ * of_property_for_each_string(np, "propname", prop, s)
+ *         printk("String value: %s\n", s);
+ */
+const char *of_prop_next_string(struct property *prop, const char *cur);
+#define of_property_for_each_string(np, propname, prop, s)      \
+        for (prop = of_find_property(np, propname, NULL),       \
+                s = of_prop_next_string(prop, NULL);            \
+                s;                                              \
+                s = of_prop_next_string(prop, s))
+
 #else /* CONFIG_OF */
 
 static inline bool of_have_populated_dt(void)
@@ -269,6 +311,11 @@ static inline bool of_have_populated_dt(void)
 #define for_each_child_of_node(parent, child) \
         while (0)
 
+static inline int of_get_child_count(const struct device_node *np)
+{
+        return 0;
+}
+
 static inline int of_device_is_compatible(const struct device_node *device,
                                           const char *name)
 {
@@ -349,6 +396,10 @@ static inline int of_machine_is_compatible(const char *compat)
 
 #define of_match_ptr(_ptr)      NULL
 #define of_match_node(_matches, _node)  NULL
+#define of_property_for_each_u32(np, propname, prop, p, u) \
+        while (0)
+#define of_property_for_each_string(np, propname, prop, s) \
+        while (0)
 #endif /* CONFIG_OF */
 
 /**
diff --git a/include/linux/pinctrl/consumer.h b/include/linux/pinctrl/consumer.h
index 191e72688481..6dd96fb45482 100644
--- a/include/linux/pinctrl/consumer.h
+++ b/include/linux/pinctrl/consumer.h
@@ -36,6 +36,9 @@ extern struct pinctrl_state * __must_check pinctrl_lookup_state(
                                                         const char *name);
 extern int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *s);
 
+extern struct pinctrl * __must_check devm_pinctrl_get(struct device *dev);
+extern void devm_pinctrl_put(struct pinctrl *p);
+
 #else /* !CONFIG_PINCTRL */
 
 static inline int pinctrl_request_gpio(unsigned gpio)
@@ -79,6 +82,15 @@ static inline int pinctrl_select_state(struct pinctrl *p,
         return 0;
 }
 
+static inline struct pinctrl * __must_check devm_pinctrl_get(struct device *dev)
+{
+        return NULL;
+}
+
+static inline void devm_pinctrl_put(struct pinctrl *p)
+{
+}
+
 #endif /* CONFIG_PINCTRL */
 
 static inline struct pinctrl * __must_check pinctrl_get_select(
@@ -113,6 +125,38 @@ static inline struct pinctrl * __must_check pinctrl_get_select_default(
         return pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT);
 }
 
+static inline struct pinctrl * __must_check devm_pinctrl_get_select(
+                                        struct device *dev, const char *name)
+{
+        struct pinctrl *p;
+        struct pinctrl_state *s;
+        int ret;
+
+        p = devm_pinctrl_get(dev);
+        if (IS_ERR(p))
+                return p;
+
+        s = pinctrl_lookup_state(p, name);
+        if (IS_ERR(s)) {
+                devm_pinctrl_put(p);
+                return ERR_PTR(PTR_ERR(s));
+        }
+
+        ret = pinctrl_select_state(p, s);
+        if (ret < 0) {
+                devm_pinctrl_put(p);
+                return ERR_PTR(ret);
+        }
+
+        return p;
+}
+
+static inline struct pinctrl * __must_check devm_pinctrl_get_select_default(
+                                        struct device *dev)
+{
+        return devm_pinctrl_get_select(dev, PINCTRL_STATE_DEFAULT);
+}
+
 #ifdef CONFIG_PINCONF
 
 extern int pin_config_get(const char *dev_name, const char *name,
diff --git a/include/linux/pinctrl/machine.h b/include/linux/pinctrl/machine.h
index e4d1de742502..7d22ab00343f 100644
--- a/include/linux/pinctrl/machine.h
+++ b/include/linux/pinctrl/machine.h
@@ -154,7 +154,7 @@ struct pinctrl_map {
 
 extern int pinctrl_register_mappings(struct pinctrl_map const *map,
                                 unsigned num_maps);
-
+extern void pinctrl_provide_dummies(void);
 #else
 
 static inline int pinctrl_register_mappings(struct pinctrl_map const *map,
@@ -163,5 +163,8 @@ static inline int pinctrl_register_mappings(struct pinctrl_map const *map,
         return 0;
 }
 
-#endif /* !CONFIG_PINMUX */
+static inline void pinctrl_provide_dummies(void)
+{
+}
+#endif /* !CONFIG_PINCTRL */
 #endif
diff --git a/include/linux/pinctrl/pinconf.h b/include/linux/pinctrl/pinconf.h
index ec431f03362d..e7a720104a47 100644
--- a/include/linux/pinctrl/pinconf.h
+++ b/include/linux/pinctrl/pinconf.h
@@ -25,7 +25,6 @@ struct seq_file;
  * @pin_config_get: get the config of a certain pin, if the requested config
  *      is not available on this controller this should return -ENOTSUPP
  *      and if it is available but disabled it should return -EINVAL
- * @pin_config_get: get the config of a certain pin
  * @pin_config_set: configure an individual pin
  * @pin_config_group_get: get configurations for an entire pin group
  * @pin_config_group_set: configure all pins in a group
@@ -33,6 +32,8 @@ struct seq_file;
  *      per-device info for a certain pin in debugfs
  * @pin_config_group_dbg_show: optional debugfs display hook that will provide
  *      per-device info for a certain group in debugfs
+ * @pin_config_config_dbg_show: optional debugfs display hook that will decode
+ *      and display a driver's pin configuration parameter
  */
 struct pinconf_ops {
 #ifdef CONFIG_GENERIC_PINCONF
@@ -56,6 +57,9 @@ struct pinconf_ops {
         void (*pin_config_group_dbg_show) (struct pinctrl_dev *pctldev,
                                            struct seq_file *s,
                                            unsigned selector);
+        void (*pin_config_config_dbg_show) (struct pinctrl_dev *pctldev,
+                                            struct seq_file *s,
+                                            unsigned long config);
 };
 
 #endif
diff --git a/include/linux/pinctrl/pinctrl.h b/include/linux/pinctrl/pinctrl.h
index 4e9f0788c221..3b894a668d32 100644
--- a/include/linux/pinctrl/pinctrl.h
+++ b/include/linux/pinctrl/pinctrl.h
@@ -21,9 +21,11 @@
 
 struct device;
 struct pinctrl_dev;
+struct pinctrl_map;
 struct pinmux_ops;
 struct pinconf_ops;
 struct gpio_chip;
+struct device_node;
 
 /**
  * struct pinctrl_pin_desc - boards/machines provide information on their
@@ -64,17 +66,24 @@ struct pinctrl_gpio_range {
 /**
  * struct pinctrl_ops - global pin control operations, to be implemented by
  * pin controller drivers.
- * @list_groups: list the number of selectable named groups available
- *      in this pinmux driver, the core will begin on 0 and call this
- *      repeatedly as long as it returns >= 0 to enumerate the groups
+ * @get_groups_count: Returns the count of total number of groups registered.
  * @get_group_name: return the group name of the pin group
  * @get_group_pins: return an array of pins corresponding to a certain
  *      group selector @pins, and the size of the array in @num_pins
  * @pin_dbg_show: optional debugfs display hook that will provide per-device
  *      info for a certain pin in debugfs
+ * @dt_node_to_map: parse a device tree "pin configuration node", and create
+ *      mapping table entries for it. These are returned through the @map and
+ *      @num_maps output parameters. This function is optional, and may be
+ *      omitted for pinctrl drivers that do not support device tree.
+ * @dt_free_map: free mapping table entries created via @dt_node_to_map. The
+ *      top-level @map pointer must be freed, along with any dynamically
+ *      allocated members of the mapping table entries themselves. This
+ *      function is optional, and may be omitted for pinctrl drivers that do
+ *      not support device tree.
  */
 struct pinctrl_ops {
-        int (*list_groups) (struct pinctrl_dev *pctldev, unsigned selector);
+        int (*get_groups_count) (struct pinctrl_dev *pctldev);
         const char *(*get_group_name) (struct pinctrl_dev *pctldev,
                                        unsigned selector);
         int (*get_group_pins) (struct pinctrl_dev *pctldev,
@@ -83,6 +92,11 @@ struct pinctrl_ops {
                                unsigned *num_pins);
         void (*pin_dbg_show) (struct pinctrl_dev *pctldev, struct seq_file *s,
                           unsigned offset);
+        int (*dt_node_to_map) (struct pinctrl_dev *pctldev,
+                               struct device_node *np_config,
+                               struct pinctrl_map **map, unsigned *num_maps);
+        void (*dt_free_map) (struct pinctrl_dev *pctldev,
+                             struct pinctrl_map *map, unsigned num_maps);
 };
 
 /**
diff --git a/include/linux/pinctrl/pinmux.h b/include/linux/pinctrl/pinmux.h
index 47e9237edd47..1818dcbdd9ab 100644
--- a/include/linux/pinctrl/pinmux.h
+++ b/include/linux/pinctrl/pinmux.h
@@ -23,15 +23,14 @@ struct pinctrl_dev;
 /**
  * struct pinmux_ops - pinmux operations, to be implemented by pin controller
  * drivers that support pinmuxing
- * @request: called by the core to see if a certain pin can be made available
+ * @request: called by the core to see if a certain pin can be made
  *      available for muxing. This is called by the core to acquire the pins
  *      before selecting any actual mux setting across a function. The driver
  *      is allowed to answer "no" by returning a negative error code
  * @free: the reverse function of the request() callback, frees a pin after
  *      being requested
- * @list_functions: list the number of selectable named functions available
- *      in this pinmux driver, the core will begin on 0 and call this
- *      repeatedly as long as it returns >= 0 to enumerate mux settings
+ * @get_functions_count: returns number of selectable named functions available
+ *      in this pinmux driver
  * @get_function_name: return the function name of the muxing selector,
  *      called by the core to figure out which mux setting it shall map a
  *      certain device to
@@ -62,7 +61,7 @@ struct pinctrl_dev;
 struct pinmux_ops {
         int (*request) (struct pinctrl_dev *pctldev, unsigned offset);
         int (*free) (struct pinctrl_dev *pctldev, unsigned offset);
-        int (*list_functions) (struct pinctrl_dev *pctldev, unsigned selector);
+        int (*get_functions_count) (struct pinctrl_dev *pctldev);
         const char *(*get_function_name) (struct pinctrl_dev *pctldev,
                                           unsigned selector);
         int (*get_function_groups) (struct pinctrl_dev *pctldev,