1 files changed, 72 insertions, 10 deletions

diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 2dae05705f13..225f733e7533 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
  *
- * Author: Liam Girdwood <lg@opensource.wolfsonmicro.com>
+ * Author: Liam Girdwood <lrg@slimlogic.co.uk>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -21,25 +21,39 @@
 struct regulator_dev;
 struct regulator_init_data;
 
+enum regulator_status {
+        REGULATOR_STATUS_OFF,
+        REGULATOR_STATUS_ON,
+        REGULATOR_STATUS_ERROR,
+        /* fast/normal/idle/standby are flavors of "on" */
+        REGULATOR_STATUS_FAST,
+        REGULATOR_STATUS_NORMAL,
+        REGULATOR_STATUS_IDLE,
+        REGULATOR_STATUS_STANDBY,
+};
+
 /**
  * struct regulator_ops - regulator operations.
  *
- * This struct describes regulator operations which can be implemented by
- * regulator chip drivers.
- *
- * @enable: Enable the regulator.
- * @disable: Disable the regulator.
+ * @enable: Configure the regulator as enabled.
+ * @disable: Configure the regulator as disabled.
  * @is_enabled: Return 1 if the regulator is enabled, 0 otherwise.
  *
  * @set_voltage: Set the voltage for the regulator within the range specified.
  *               The driver should select the voltage closest to min_uV.
  * @get_voltage: Return the currently configured voltage for the regulator.
+ * @list_voltage: Return one of the supported voltages, in microvolts; zero
+ *      if the selector indicates a voltage that is unusable on this system;
+ *      or negative errno.  Selectors range from zero to one less than
+ *      regulator_desc.n_voltages.  Voltages may be reported in any order.
  *
  * @set_current_limit: Configure a limit for a current-limited regulator.
- * @get_current_limit: Get the limit for a current-limited regulator.
+ * @get_current_limit: Get the configured limit for a current-limited regulator.
  *
- * @set_mode: Set the operating mode for the regulator.
- * @get_mode: Get the current operating mode for the regulator.
+ * @set_mode: Set the configured operating mode for the regulator.
+ * @get_mode: Get the configured operating mode for the regulator.
+ * @get_status: Return actual (not as-configured) status of regulator, as a
+ *      REGULATOR_STATUS value (or negative errno)
  * @get_optimum_mode: Get the most efficient operating mode for the regulator
  *                    when running with the specified parameters.
  *
@@ -51,9 +65,15 @@ struct regulator_init_data;
  *                       suspended.
  * @set_suspend_mode: Set the operating mode for the regulator when the
  *                    system is suspended.
+ *
+ * This struct describes regulator operations which can be implemented by
+ * regulator chip drivers.
  */
 struct regulator_ops {
 
+        /* enumerate supported voltages */
+        int (*list_voltage) (struct regulator_dev *, unsigned selector);
+
         /* get/set regulator voltage */
         int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV);
         int (*get_voltage) (struct regulator_dev *);
@@ -72,6 +92,13 @@ struct regulator_ops {
         int (*set_mode) (struct regulator_dev *, unsigned int mode);
         unsigned int (*get_mode) (struct regulator_dev *);
 
+        /* report regulator status ... most other accessors report
+         * control inputs, this reports results of combining inputs
+         * from Linux (and other sources) with the actual load.
+         * returns REGULATOR_STATUS_* or negative errno.
+         */
+        int (*get_status)(struct regulator_dev *);
+
         /* get most efficient regulator operating mode for load */
         unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
                                           int output_uV, int load_uA);
@@ -106,6 +133,7 @@ enum regulator_type {
  *
  * @name: Identifying name for the regulator.
  * @id: Numerical identifier for the regulator.
+ * @n_voltages: Number of selectors available for ops.list_voltage().
  * @ops: Regulator operations table.
  * @irq: Interrupt number for the regulator.
  * @type: Indicates if the regulator is a voltage or current regulator.
@@ -114,14 +142,48 @@ enum regulator_type {
 struct regulator_desc {
         const char *name;
         int id;
+        unsigned n_voltages;
         struct regulator_ops *ops;
         int irq;
         enum regulator_type type;
         struct module *owner;
 };
 
+/*
+ * struct regulator_dev
+ *
+ * Voltage / Current regulator class device. One for each
+ * regulator.
+ *
+ * This should *not* be used directly by anything except the regulator
+ * core and notification injection (which should take the mutex and do
+ * no other direct access).
+ */
+struct regulator_dev {
+        struct regulator_desc *desc;
+        int use_count;
+
+        /* lists we belong to */
+        struct list_head list; /* list of all regulators */
+        struct list_head slist; /* list of supplied regulators */
+
+        /* lists we own */
+        struct list_head consumer_list; /* consumers we supply */
+        struct list_head supply_list; /* regulators we supply */
+
+        struct blocking_notifier_head notifier;
+        struct mutex mutex; /* consumer lock */
+        struct module *owner;
+        struct device dev;
+        struct regulation_constraints *constraints;
+        struct regulator_dev *supply;   /* for tree */
+
+        void *reg_data;         /* regulator_dev data */
+};
+
 struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
-        struct device *dev, void *driver_data);
+        struct device *dev, struct regulator_init_data *init_data,
+        void *driver_data);
 void regulator_unregister(struct regulator_dev *rdev);
 
 int regulator_notifier_call_chain(struct regulator_dev *rdev,