regulator: core - Rework machine API to remove string based functions.

This improves the machine level API in order to configure
regulator constraints and consumers as platform data and removes the
old string based API that required several calls to set up each regulator.

The intention is to create a struct regulator_init_data, populate
it's fields with constraints, consumers devices, etc and then register
the regulator device from board.c in the standard Linux way.

e.g. regulator LDO2 (supplying codec and sim) platform data.

/* regulator LDO2 consumer devices */
static struct regulator_consumer_supply ldo2_consumers[] = {
{
	.dev	= &platform_audio_device.dev,
	.supply	= "codec_avdd",
},
{
	.dev	= &platform_sim_device.dev,
	.supply	= "sim_vcc",
}
};

/* regulator LDO2 constraints  */
static struct regulator_init_data ldo2_data = {
	.constraints = {
		.min_uV = 3300000,
		.max_uV = 3300000,
		.valid_modes_mask = REGULATOR_MODE_NORMAL,
		.apply_uV = 1,
	},
	.num_consumer_supplies = ARRAY_SIZE(ldo2_consumers),
	.consumer_supplies = ldo2_consumers,
};

/* machine regulator devices with thier consumers and constraints */
static struct platform_device wm8350_regulator_devices[] = {
{
	.name = "wm8350-regulator",
	.id = WM8350_LDO_2,
	.dev = {
		.platform_data = &ldo2_data,
	},
},
};

Changes in detail:-

  o Removed all const char* regulator config functions in machine API.
  o Created new struct regulator_init_data to contain regulator
    machine configuration constraints and consmuers.
  o Changed set_supply(), set_machine_constraints(),
    set_consumer_device_supply() to remove their string identifier
    parameters. Also made them static and moved functions nearer top of
    core.c.
  o Removed no longer used inline func to_rdev()
  o Added regulator_get_init_drvdata() to retrieve init data.
  o Added struct device* as parameter to regulator_register().
  o Changed my email address.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

2 files changed, 29 insertions, 9 deletions

diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 1d712c7172a2..bc01b42a8583 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -18,8 +18,8 @@
 #include <linux/device.h>
 #include <linux/regulator/consumer.h>
 
-struct regulator_constraints;
 struct regulator_dev;
+struct regulator_init_data;
 
 /**
  * struct regulator_ops - regulator operations.
@@ -85,15 +85,17 @@ struct regulator_desc {
         struct module *owner;
 };
 
-
 struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
-                                          void *reg_data);
+        struct device *dev, void *driver_data);
 void regulator_unregister(struct regulator_dev *rdev);
 
 int regulator_notifier_call_chain(struct regulator_dev *rdev,
                                   unsigned long event, void *data);
 
 void *rdev_get_drvdata(struct regulator_dev *rdev);
+struct device *rdev_get_dev(struct regulator_dev *rdev);
 int rdev_get_id(struct regulator_dev *rdev);
 
+void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);
+
 #endif
diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h
index 11e737dbfcf2..c6d69331a81e 100644
--- a/include/linux/regulator/machine.h
+++ b/include/linux/regulator/machine.h
@@ -89,15 +89,33 @@ struct regulation_constraints {
         unsigned apply_uV:1;    /* apply uV constraint iff min == max */
 };
 
-int regulator_set_supply(const char *regulator, const char *regulator_supply);
+/**
+ * struct regulator_consumer_supply - supply -> device mapping
+ *
+ * This maps a supply name to a device.
+ */
+struct regulator_consumer_supply {
+        struct device *dev;     /* consumer */
+        const char *supply;     /* consumer supply - e.g. "vcc" */
+};
 
-const char *regulator_get_supply(const char *regulator);
+/**
+ * struct regulator_init_data - regulator platform initialisation data.
+ *
+ * Initialisation constraints, our supply and consumers supplies.
+ */
+struct regulator_init_data {
+        struct device *supply_regulator_dev; /* or NULL for LINE */
 
-int regulator_set_machine_constraints(const char *regulator,
-        struct regulation_constraints *constraints);
+        struct regulation_constraints constraints;
 
-int regulator_set_device_supply(const char *regulator, struct device *dev,
-                                const char *supply);
+        int num_consumer_supplies;
+        struct regulator_consumer_supply *consumer_supplies;
+
+        /* optional regulator machine specific init */
+        int (*regulator_init)(void *driver_data);
+        void *driver_data;      /* core does not touch this */
+};
 
 int regulator_suspend_prepare(suspend_state_t state);