Merge tag 'regulator-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator updates from Mark Brown:
 - Support for putting regulators into bypass mode where they simply
   switch their input to the output (mainly used for low power
   retention).
 - A new API for setting voltages based on a voltage plus tolerance
   rather than an explicit voltage range.
 - Lots of cleanups and API updates from Axel Lin.
 - New driver for MAX8907.

* tag 'regulator-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (71 commits)
  regulator: arizona-ldo: Remove top voltage
  regulator: tps6586x: remove regulator-compatible from DT docs
  regulator: tps65217.txt: remove regulator-compatible from DT docs
  regulator: deprecate regulator-compatible DT property
  regulator: fan53555: remove vsel_max not used
  regulator: aat2870: Don't explicitly initialise the first field
  extcon: arizona: Use bypass mode for MICVDD
  regulator: wm831x-ldo: Add bypass support
  regulator: arizona-micsupp: Support get/set bypass
  regulator: arizona-ldo: Support get/set bypass
  regulator: core: Provide regmap get/set bypass operations
  regulator: core: Support bypass mode
  regulator: Fairchild fan53555 support
  regulator: twl: Remove another unused variable warning
  regulator: core: Try using the parent device for the default regmap
  regulator: core: Fast path non-deferred disables
  regulator: core: Report microvolts in sysfs even with only list_voltage()
  regulator: tps6586x: add support for SYS rail
  regulator: lp872x: remove unnecessary function
  regulator: lp872x: fix NULL pointer access problem
  ...

6 files changed, 96 insertions, 1 deletions

diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
index 3d7ae4d7fd3..46c0f320ed7 100644
--- a/include/linux/mfd/max77686.h
+++ b/include/linux/mfd/max77686.h
@@ -74,6 +74,7 @@ enum max77686_regulators {
 struct max77686_regulator_data {
 	int id;
 	struct regulator_init_data *initdata;
+	struct device_node *of_node;
 };
 
 enum max77686_opmode {
diff --git a/include/linux/mfd/tps6586x.h b/include/linux/mfd/tps6586x.h
index f350fd0ba1d..94514710a03 100644
--- a/include/linux/mfd/tps6586x.h
+++ b/include/linux/mfd/tps6586x.h
@@ -14,6 +14,7 @@
 #define TPS6586X_SLEW_RATE_MASK         0x07
 
 enum {
+	TPS6586X_ID_SYS,
 	TPS6586X_ID_SM_0,
 	TPS6586X_ID_SM_1,
 	TPS6586X_ID_SM_2,
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index da339fd8c75..c43cd3556b1 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -177,6 +177,8 @@ int regulator_set_mode(struct regulator *regulator, unsigned int mode);
 unsigned int regulator_get_mode(struct regulator *regulator);
 int regulator_set_optimum_mode(struct regulator *regulator, int load_uA);
 
+int regulator_allow_bypass(struct regulator *regulator, bool allow);
+
 /* regulator notifier block */
 int regulator_register_notifier(struct regulator *regulator,
 			      struct notifier_block *nb);
@@ -328,6 +330,12 @@ static inline int regulator_set_optimum_mode(struct regulator *regulator,
 	return REGULATOR_MODE_NORMAL;
 }
 
+static inline int regulator_allow_bypass(struct regulator *regulator,
+					 bool allow)
+{
+	return 0;
+}
+
 static inline int regulator_register_notifier(struct regulator *regulator,
 			      struct notifier_block *nb)
 {
@@ -352,4 +360,11 @@ static inline void regulator_set_drvdata(struct regulator *regulator,
 
 #endif
 
+static inline int regulator_set_voltage_tol(struct regulator *regulator,
+					    int new_uV, int tol_uV)
+{
+	return regulator_set_voltage(regulator,
+				     new_uV - tol_uV, new_uV + tol_uV);
+}
+
 #endif
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index bac4c871f3b..7932a3bf21b 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -32,6 +32,8 @@ enum regulator_status {
 	REGULATOR_STATUS_NORMAL,
 	REGULATOR_STATUS_IDLE,
 	REGULATOR_STATUS_STANDBY,
+	/* The regulator is enabled but not regulating */
+	REGULATOR_STATUS_BYPASS,
 	/* in case that any other status doesn't apply */
 	REGULATOR_STATUS_UNDEFINED,
 };
@@ -58,6 +60,7 @@ enum regulator_status {
  *	regulator_desc.n_voltages.  Voltages may be reported in any order.
  *
  * @set_current_limit: Configure a limit for a current-limited regulator.
+ *                     The driver should select the current closest to max_uA.
  * @get_current_limit: Get the configured limit for a current-limited regulator.
  *
  * @set_mode: Set the configured operating mode for the regulator.
@@ -67,6 +70,9 @@ enum regulator_status {
  * @get_optimum_mode: Get the most efficient operating mode for the regulator
  *                    when running with the specified parameters.
  *
+ * @set_bypass: Set the regulator in bypass mode.
+ * @get_bypass: Get the regulator bypass mode state.
+ *
  * @enable_time: Time taken for the regulator voltage output voltage to
  *               stabilise after being enabled, in microseconds.
  * @set_ramp_delay: Set the ramp delay for the regulator. The driver should
@@ -133,6 +139,10 @@ struct regulator_ops {
 	unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
 					  int output_uV, int load_uA);
 
+	/* control and report on bypass mode */
+	int (*set_bypass)(struct regulator_dev *dev, bool enable);
+	int (*get_bypass)(struct regulator_dev *dev, bool *enable);
+
 	/* the operations below are for configuration of regulator state when
 	 * its parent PMIC enters a global STANDBY/HIBERNATE state */
 
@@ -205,6 +215,8 @@ struct regulator_desc {
 	unsigned int vsel_mask;
 	unsigned int enable_reg;
 	unsigned int enable_mask;
+	unsigned int bypass_reg;
+	unsigned int bypass_mask;
 
 	unsigned int enable_time;
 };
@@ -221,7 +233,8 @@ struct regulator_desc {
  * @driver_data: private regulator data
  * @of_node: OpenFirmware node to parse for device tree bindings (may be
  *           NULL).
- * @regmap: regmap to use for core regmap helpers
+ * @regmap: regmap to use for core regmap helpers if dev_get_regulator() is
+ *          insufficient.
  * @ena_gpio: GPIO controlling regulator enable.
  * @ena_gpio_invert: Sense for GPIO enable control.
  * @ena_gpio_flags: Flags to use when calling gpio_request_one()
@@ -253,6 +266,7 @@ struct regulator_dev {
 	int exclusive;
 	u32 use_count;
 	u32 open_count;
+	u32 bypass_count;
 
 	/* lists we belong to */
 	struct list_head list; /* list of all regulators */
@@ -310,6 +324,8 @@ int regulator_disable_regmap(struct regulator_dev *rdev);
 int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
 				   unsigned int old_selector,
 				   unsigned int new_selector);
+int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable);
+int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable);
 
 void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);
 
diff --git a/include/linux/regulator/fan53555.h b/include/linux/regulator/fan53555.h
new file mode 100644
index 00000000000..5c45c85d52c
--- /dev/null
+++ b/include/linux/regulator/fan53555.h
@@ -0,0 +1,60 @@
+/*
+ * fan53555.h - Fairchild Regulator FAN53555 Driver
+ *
+ * Copyright (C) 2012 Marvell Technology Ltd.
+ * Yunfan Zhang <yfzhang@marvell.com>
+ *
+ * This package is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef __FAN53555_H__
+
+/* VSEL ID */
+enum {
+	FAN53555_VSEL_ID_0 = 0,
+	FAN53555_VSEL_ID_1,
+};
+
+/* Transition slew rate limiting from a low to high voltage.
+ * -----------------------
+ *   Bin |Slew Rate(mV/uS)
+ * ------|----------------
+ *   000 |    64.00
+ * ------|----------------
+ *   001 |    32.00
+ * ------|----------------
+ *   010 |    16.00
+ * ------|----------------
+ *   011 |     8.00
+ * ------|----------------
+ *   100 |     4.00
+ * ------|----------------
+ *   101 |     2.00
+ * ------|----------------
+ *   110 |     1.00
+ * ------|----------------
+ *   111 |     0.50
+ * -----------------------
+ */
+enum {
+	FAN53555_SLEW_RATE_64MV = 0,
+	FAN53555_SLEW_RATE_32MV,
+	FAN53555_SLEW_RATE_16MV,
+	FAN53555_SLEW_RATE_8MV,
+	FAN53555_SLEW_RATE_4MV,
+	FAN53555_SLEW_RATE_2MV,
+	FAN53555_SLEW_RATE_1MV,
+	FAN53555_SLEW_RATE_0_5MV,
+};
+
+struct fan53555_platform_data {
+	struct regulator_init_data *regulator;
+	unsigned int slew_rate;
+	/* Sleep VSEL ID */
+	unsigned int sleep_vsel_id;
+};
+
+#endif /* __FAN53555_H__ */
diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h
index 40dd0a394cf..36adbc82de6 100644
--- a/include/linux/regulator/machine.h
+++ b/include/linux/regulator/machine.h
@@ -32,6 +32,7 @@ struct regulator;
  *           board/machine.
  * STATUS:   Regulator can be enabled and disabled.
  * DRMS:     Dynamic Regulator Mode Switching is enabled for this regulator.
+ * BYPASS:   Regulator can be put into bypass mode
  */
 
 #define REGULATOR_CHANGE_VOLTAGE	0x1
@@ -39,6 +40,7 @@ struct regulator;
 #define REGULATOR_CHANGE_MODE		0x4
 #define REGULATOR_CHANGE_STATUS		0x8
 #define REGULATOR_CHANGE_DRMS		0x10
+#define REGULATOR_CHANGE_BYPASS		0x20
 
 /**
  * struct regulator_state - regulator state during low power system states