pinctrl: refactor struct pinctrl handling in core.c vs pinmux.c

This change separates two aspects of struct pinctrl:

a) The data representation of the parsed mapping table, into:

   1) The top-level struct pinctrl object, a single entity returned
      by pinctrl_get().

   2) The parsed version of each mapping table entry, struct
      pinctrl_setting, of which there is one per mapping table entry.

b) The code that handles this; the code for (1) above is in core.c, and
   the code to parse/execute each entry in (2) above is in pinmux.c, while
   the iteration over multiple settings is lifted to core.c.

This will allow the following future changes:

1) pinctrl_get() API rework, so that struct pinctrl represents all states
   for the device, and the device can select between them without calling
   put()/get() again.

2) To support that, a struct pinctrl_state object will be inserted into
   the data model between the struct pinctrl and struct pinctrl_setting.

3) The mapping table will be extended to allow specification of pin config
   settings too. To support this, struct pinctrl_setting will be enhanced
   to store either mux settings or config settings, and functions will be
   added to pinconf.c to parse/execute pin configuration settings.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 16 insertions, 25 deletions

diff --git a/drivers/pinctrl/pinmux.h b/drivers/pinctrl/pinmux.h
index 822febb2d968..1500ae88f87c 100644
--- a/drivers/pinctrl/pinmux.h
+++ b/drivers/pinctrl/pinmux.h
@@ -13,6 +13,7 @@
 #ifdef CONFIG_PINMUX
 
 int pinmux_check_ops(struct pinctrl_dev *pctldev);
+
 int pinmux_request_gpio(struct pinctrl_dev *pctldev,
                         struct pinctrl_gpio_range *range,
                         unsigned pin, unsigned gpio);
@@ -21,21 +22,16 @@ void pinmux_free_gpio(struct pinctrl_dev *pctldev, unsigned pin,
 int pinmux_gpio_direction(struct pinctrl_dev *pctldev,
                           struct pinctrl_gpio_range *range,
                           unsigned pin, bool input);
-static inline void pinmux_init_pinctrl_handle(struct pinctrl *p)
-{
-        INIT_LIST_HEAD(&p->groups);
-}
-int pinmux_apply_muxmap(struct pinctrl_dev *pctldev,
-                        struct pinctrl *p,
-                        struct device *dev,
-                        const char *devname,
-                        struct pinctrl_map const *map);
-void pinmux_put(struct pinctrl *p);
-int pinmux_enable(struct pinctrl *p);
-void pinmux_disable(struct pinctrl *p);
+
+int pinmux_map_to_setting(struct pinctrl_map const *map,
+                          struct pinctrl_setting *setting);
+void pinmux_free_setting(struct pinctrl_setting const *setting);
+int pinmux_enable_setting(struct pinctrl_setting const *setting);
+void pinmux_disable_setting(struct pinctrl_setting const *setting);
+
+void pinmux_dbg_show(struct seq_file *s, struct pinctrl_setting const *setting);
 void pinmux_init_device_debugfs(struct dentry *devroot,
                                 struct pinctrl_dev *pctldev);
-void pinmux_dbg_show(struct seq_file *s, struct pinctrl *p);
 
 #else
 
@@ -64,28 +60,23 @@ static inline int pinmux_gpio_direction(struct pinctrl_dev *pctldev,
         return 0;
 }
 
-static inline void pinmux_init_pinctrl_handle(struct pinctrl *p)
-{
-}
-
-static inline int pinmux_apply_muxmap(struct pinctrl_dev *pctldev,
-                                      struct pinctrl *p,
-                                      struct device *dev,
-                                      const char *devname,
-                                      struct pinctrl_map const *map)
+static inline int pinmux_map_to_setting(struct pinctrl_map const *map,
+                          struct pinctrl_setting *setting)
 {
         return 0;
 }
 
-static inline void pinmux_put(struct pinctrl *p)
+static inline void pinmux_free_setting(struct pinctrl_setting const *setting)
 {
 }
 
-static inline int pinmux_enable(struct pinctrl *p)
+static inline int pinmux_enable_setting(struct pinctrl_setting const *setting)
 {
+        return 0;
 }
 
-static inline void pinmux_disable(struct pinctrl *p)
+static inline void pinmux_disable_setting(
+                        struct pinctrl_setting const *setting)
 {
 }