Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (32 commits)
  regulator: twl4030 VAUX3 supports 3.0V
  regulator: Support disabling of unused regulators by machines
  regulator: Don't increment use_count for boot_on regulators
  twl4030-regulator: expose VPLL2
  regulator: refcount fixes
  regulator: Don't warn if we failed to get a regulator
  regulator: Allow boot_on regulators to be disabled by clients
  regulator: Implement list_voltage for WM835x LDOs and DCDCs
  twl4030-regulator: list more VAUX4 voltages
  regulator: Don't warn on omitted voltage constraints
  regulator: Implement list_voltage() for WM8400 DCDCs and LDOs
  MMC: regulator utilities
  regulator: twl4030 voltage enumeration (v2)
  regulator: twl4030 regulators
  regulator: get_status() grows kerneldoc
  regulator: enumerate voltages (v2)
  regulator: Fix get_mode() for WM835x DCDCs
  regulator: Allow regulators to set the initial operating mode
  regulator: Suggest use of datasheet supply or pin names for consumers
  regulator: email - update email address and regulator webpage.
  ...

Documentation/ABI/testing/sysfs-class-regulator

@@ -4,8 +4,8 @@ KernelVersion:	2.6.26
 Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Some regulator directories will contain a field called
-		state. This reports the regulator enable status, for
-		regulators which can report that value.
+		state. This reports the regulator enable control, for
+		regulators which can report that input value.
 
 		This will be one of the following strings:
 
@@ -14,16 +14,54 @@ Description:
 		'unknown'
 
 		'enabled' means the regulator output is ON and is supplying
-		power to the system.
+		power to the system (assuming no error prevents it).
 
 		'disabled' means the regulator output is OFF and is not
-		supplying power to the system..
+		supplying power to the system (unless some non-Linux
+		control has enabled it).
 
 		'unknown' means software cannot determine the state, or
 		the reported state is invalid.
 
 		NOTE: this field can be used in conjunction with microvolts
-		and microamps to determine regulator output levels.
+		or microamps to determine configured regulator output levels.
+
+
+What:		/sys/class/regulator/.../status
+Description:
+		Some regulator directories will contain a field called
+		"status". This reports the current regulator status, for
+		regulators which can report that output value.
+
+		This will be one of the following strings:
+
+			off
+			on
+			error
+			fast
+			normal
+			idle
+			standby
+
+		"off" means the regulator is not supplying power to the
+		system.
+
+		"on" means the regulator is supplying power to the system,
+		and the regulator can't report a detailed operation mode.
+
+		"error" indicates an out-of-regulation status such as being
+		disabled due to thermal shutdown, or voltage being unstable
+		because of problems with the input power supply.
+
+		"fast", "normal", "idle", and "standby" are all detailed
+		regulator operation modes (described elsewhere).  They
+		imply "on", but provide more detail.
+
+		Note that regulator status is a function of many inputs,
+		not limited to control inputs from Linux.  For example,
+		the actual load presented may trigger "error" status; or
+		a regulator may be enabled by another user, even though
+		Linux did not enable it.
 
 
 What:		/sys/class/regulator/.../type
@@ -58,7 +96,7 @@ Description:
 		Some regulator directories will contain a field called
 		microvolts. This holds the regulator output voltage setting
 		measured in microvolts (i.e. E-6 Volts), for regulators
-		which can report that voltage.
+		which can report the control input for voltage.
 
 		NOTE: This value should not be used to determine the regulator
 		output voltage level as this value is the same regardless of
@@ -73,7 +111,7 @@ Description:
 		Some regulator directories will contain a field called
 		microamps. This holds the regulator output current limit
 		setting measured in microamps (i.e. E-6 Amps), for regulators
-		which can report that current.
+		which can report the control input for a current limit.
 
 		NOTE: This value should not be used to determine the regulator
 		output current level as this value is the same regardless of
@@ -87,7 +125,7 @@ Contact:	Liam Girdwood <lrg@slimlogic.co.uk>
 Description:
 		Some regulator directories will contain a field called
 		opmode. This holds the current regulator operating mode,
-		for regulators which can report it.
+		for regulators which can report that control input value.
 
 		The opmode value can be one of the following strings:
 
@@ -101,7 +139,8 @@ Description:
 
 		NOTE: This value should not be used to determine the regulator
 		output operating mode as this value is the same regardless of
-		whether the regulator is enabled or disabled.
+		whether the regulator is enabled or disabled.  A "status"
+		attribute may be available to determine the actual mode.
 
 
 What:		/sys/class/regulator/.../min_microvolts

MAINTAINERS

@@ -4847,7 +4847,7 @@ M:	lrg@slimlogic.co.uk
 P:	Mark Brown
 M:	broonie@opensource.wolfsonmicro.com
 W:	http://opensource.wolfsonmicro.com/node/15
-W:	http://www.slimlogic.co.uk/?page_id=5
+W:	http://www.slimlogic.co.uk/?p=48
 T:	git kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6.git
 S:	Supported
 

drivers/mfd/twl4030-core.c

@@ -592,11 +592,9 @@ add_children(struct twl4030_platform_data *pdata, unsigned long features)
 
 	/* maybe add LDOs that are omitted on cost-reduced parts */
 	if (twl_has_regulator() && !(features & TPS_SUBSET)) {
-		/*
 		child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
 		if (IS_ERR(child))
 			return PTR_ERR(child);
-		*/
 
 		child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
 		if (IS_ERR(child))

drivers/mmc/core/core.c

@@ -21,6 +21,7 @@
 #include <linux/leds.h>
 #include <linux/scatterlist.h>
 #include <linux/log2.h>
+#include <linux/regulator/consumer.h>
 
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
@@ -523,6 +524,105 @@ u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max)
 }
 EXPORT_SYMBOL(mmc_vddrange_to_ocrmask);
 
+#ifdef CONFIG_REGULATOR
+
+/**
+ * mmc_regulator_get_ocrmask - return mask of supported voltages
+ * @supply: regulator to use
+ *
+ * This returns either a negative errno, or a mask of voltages that
+ * can be provided to MMC/SD/SDIO devices using the specified voltage
+ * regulator.  This would normally be called before registering the
+ * MMC host adapter.
+ */
+int mmc_regulator_get_ocrmask(struct regulator *supply)
+{
+	int			result = 0;
+	int			count;
+	int			i;
+
+	count = regulator_count_voltages(supply);
+	if (count < 0)
+		return count;
+
+	for (i = 0; i < count; i++) {
+		int		vdd_uV;
+		int		vdd_mV;
+
+		vdd_uV = regulator_list_voltage(supply, i);
+		if (vdd_uV <= 0)
+			continue;
+
+		vdd_mV = vdd_uV / 1000;
+		result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
+	}
+
+	return result;
+}
+EXPORT_SYMBOL(mmc_regulator_get_ocrmask);
+
+/**
+ * mmc_regulator_set_ocr - set regulator to match host->ios voltage
+ * @vdd_bit: zero for power off, else a bit number (host->ios.vdd)
+ * @supply: regulator to use
+ *
+ * Returns zero on success, else negative errno.
+ *
+ * MMC host drivers may use this to enable or disable a regulator using
+ * a particular supply voltage.  This would normally be called from the
+ * set_ios() method.
+ */
+int mmc_regulator_set_ocr(struct regulator *supply, unsigned short vdd_bit)
+{
+	int			result = 0;
+	int			min_uV, max_uV;
+	int			enabled;
+
+	enabled = regulator_is_enabled(supply);
+	if (enabled < 0)
+		return enabled;
+
+	if (vdd_bit) {
+		int		tmp;
+		int		voltage;
+
+		/* REVISIT mmc_vddrange_to_ocrmask() may have set some
+		 * bits this regulator doesn't quite support ... don't
+		 * be too picky, most cards and regulators are OK with
+		 * a 0.1V range goof (it's a small error percentage).
+		 */
+		tmp = vdd_bit - ilog2(MMC_VDD_165_195);
+		if (tmp == 0) {
+			min_uV = 1650 * 1000;
+			max_uV = 1950 * 1000;
+		} else {
+			min_uV = 1900 * 1000 + tmp * 100 * 1000;
+			max_uV = min_uV + 100 * 1000;
+		}
+
+		/* avoid needless changes to this voltage; the regulator
+		 * might not allow this operation
+		 */
+		voltage = regulator_get_voltage(supply);
+		if (voltage < 0)
+			result = voltage;
+		else if (voltage < min_uV || voltage > max_uV)
+			result = regulator_set_voltage(supply, min_uV, max_uV);
+		else
+			result = 0;
+
+		if (result == 0 && !enabled)
+			result = regulator_enable(supply);
+	} else if (enabled) {
+		result = regulator_disable(supply);
+	}
+
+	return result;
+}
+EXPORT_SYMBOL(mmc_regulator_set_ocr);
+
+#endif
+
 /*
  * Mask off any voltages we don't support and select
  * the lowest voltage

drivers/regulator/Kconfig

@@ -29,8 +29,12 @@ config REGULATOR_DEBUG
 	  Say yes here to enable debugging support.
 
 config REGULATOR_FIXED_VOLTAGE
-	tristate
+	tristate "Fixed voltage regulator support"
 	default n
+	help
+	  This driver provides support for fixed voltage regulators,
+	  useful for systems which use a combination of software
+	  managed regulators and simple non-configurable regulators.
 
 config REGULATOR_VIRTUAL_CONSUMER
 	tristate "Virtual regulator consumer support"
@@ -52,6 +56,13 @@ config REGULATOR_BQ24022
 	  charging select between 100 mA and 500 mA charging current
 	  limit.
 
+config REGULATOR_TWL4030
+	bool "TI TWL4030/TWL5030/TPS695x0 PMIC"
+	depends on TWL4030_CORE
+	help
+	  This driver supports the voltage regulators provided by
+	  this family of companion chips.
+
 config REGULATOR_WM8350
 	tristate "Wolfson Microelectroncis WM8350 AudioPlus PMIC"
 	depends on MFD_WM8350

drivers/regulator/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
 obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
 
 obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
+obj-$(CONFIG_REGULATOR_TWL4030) += twl4030-regulator.o
 obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
 obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
 obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o

drivers/regulator/bq24022.c

@@ -105,7 +105,8 @@ static int __init bq24022_probe(struct platform_device *pdev)
 	ret = gpio_direction_output(pdata->gpio_iset2, 0);
 	ret = gpio_direction_output(pdata->gpio_nce, 1);
 
-	bq24022 = regulator_register(&bq24022_desc, &pdev->dev, pdata);
+	bq24022 = regulator_register(&bq24022_desc, &pdev->dev,
+				     pdata->init_data, pdata);
 	if (IS_ERR(bq24022)) {
 		dev_dbg(&pdev->dev, "couldn't register regulator\n");
 		ret = PTR_ERR(bq24022);

drivers/regulator/core.c

@@ -28,33 +28,7 @@
 static DEFINE_MUTEX(regulator_list_mutex);
 static LIST_HEAD(regulator_list);
 static LIST_HEAD(regulator_map_list);
-
-/*
- * struct regulator_dev
- *
- * Voltage / Current regulator class device. One for each regulator.
- */
-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 */
-};
+static int has_full_constraints;
 
 /*
  * struct regulator_map
@@ -79,7 +53,6 @@ struct regulator {
 	int uA_load;
 	int min_uV;
 	int max_uV;
-	int enabled; /* count of client enables */
 	char *supply_name;
 	struct device_attribute dev_attr;
 	struct regulator_dev *rdev;
@@ -312,6 +285,47 @@ static ssize_t regulator_state_show(struct device *dev,
 }
 static DEVICE_ATTR(state, 0444, regulator_state_show, NULL);
 
+static ssize_t regulator_status_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct regulator_dev *rdev = dev_get_drvdata(dev);
+	int status;
+	char *label;
+
+	status = rdev->desc->ops->get_status(rdev);
+	if (status < 0)
+		return status;
+
+	switch (status) {
+	case REGULATOR_STATUS_OFF:
+		label = "off";
+		break;
+	case REGULATOR_STATUS_ON:
+		label = "on";
+		break;
+	case REGULATOR_STATUS_ERROR:
+		label = "error";
+		break;
+	case REGULATOR_STATUS_FAST:
+		label = "fast";
+		break;
+	case REGULATOR_STATUS_NORMAL:
+		label = "normal";
+		break;
+	case REGULATOR_STATUS_IDLE:
+		label = "idle";
+		break;
+	case REGULATOR_STATUS_STANDBY:
+		label = "standby";
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	return sprintf(buf, "%s\n", label);
+}
+static DEVICE_ATTR(status, 0444, regulator_status_show, NULL);
+
 static ssize_t regulator_min_uA_show(struct device *dev,
 				    struct device_attribute *attr, char *buf)
 {
@@ -678,6 +692,73 @@ static int set_machine_constraints(struct regulator_dev *rdev,
 	else
 		name = "regulator";
 
+	/* constrain machine-level voltage specs to fit
+	 * the actual range supported by this regulator.
+	 */
+	if (ops->list_voltage && rdev->desc->n_voltages) {
+		int	count = rdev->desc->n_voltages;
+		int	i;
+		int	min_uV = INT_MAX;
+		int	max_uV = INT_MIN;
+		int	cmin = constraints->min_uV;
+		int	cmax = constraints->max_uV;
+
+		/* it's safe to autoconfigure fixed-voltage supplies */
+		if (count == 1 && !cmin) {
+			cmin = INT_MIN;
+			cmax = INT_MAX;
+		}
+
+		/* voltage constraints are optional */
+		if ((cmin == 0) && (cmax == 0))
+			goto out;
+
+		/* else require explicit machine-level constraints */
+		if (cmin <= 0 || cmax <= 0 || cmax < cmin) {
+			pr_err("%s: %s '%s' voltage constraints\n",
+				       __func__, "invalid", name);
+			ret = -EINVAL;
+			goto out;
+		}
+
+		/* initial: [cmin..cmax] valid, [min_uV..max_uV] not */
+		for (i = 0; i < count; i++) {
+			int	value;
+
+			value = ops->list_voltage(rdev, i);
+			if (value <= 0)
+				continue;
+
+			/* maybe adjust [min_uV..max_uV] */
+			if (value >= cmin && value < min_uV)
+				min_uV = value;
+			if (value <= cmax && value > max_uV)
+				max_uV = value;
+		}
+
+		/* final: [min_uV..max_uV] valid iff constraints valid */
+		if (max_uV < min_uV) {
+			pr_err("%s: %s '%s' voltage constraints\n",
+				       __func__, "unsupportable", name);
+			ret = -EINVAL;
+			goto out;
+		}
+
+		/* use regulator's subset of machine constraints */
+		if (constraints->min_uV < min_uV) {
+			pr_debug("%s: override '%s' %s, %d -> %d\n",
+				       __func__, name, "min_uV",
+					constraints->min_uV, min_uV);
+			constraints->min_uV = min_uV;
+		}
+		if (constraints->max_uV > max_uV) {
+			pr_debug("%s: override '%s' %s, %d -> %d\n",
+				       __func__, name, "max_uV",
+					constraints->max_uV, max_uV);
+			constraints->max_uV = max_uV;
+		}
+	}
+
 	rdev->constraints = constraints;
 
 	/* do we need to apply the constraint voltage */
@@ -695,10 +776,6 @@ static int set_machine_constraints(struct regulator_dev *rdev,
 			}
 	}
 
-	/* are we enabled at boot time by firmware / bootloader */
-	if (rdev->constraints->boot_on)
-		rdev->use_count = 1;
-
 	/* do we need to setup our suspend state */
 	if (constraints->initial_state) {
 		ret = suspend_prepare(rdev, constraints->initial_state);
@@ -710,11 +787,27 @@ static int set_machine_constraints(struct regulator_dev *rdev,
 		}
 	}
 
-	/* if always_on is set then turn the regulator on if it's not
-	 * already on. */
-	if (constraints->always_on && ops->enable &&
-	    ((ops->is_enabled && !ops->is_enabled(rdev)) ||
-	     (!ops->is_enabled && !constraints->boot_on))) {
+	if (constraints->initial_mode) {
+		if (!ops->set_mode) {
+			printk(KERN_ERR "%s: no set_mode operation for %s\n",
+			       __func__, name);
+			ret = -EINVAL;
+			goto out;
+		}
+
+		ret = ops->set_mode(rdev, constraints->initial_mode);
+		if (ret < 0) {
+			printk(KERN_ERR
+			       "%s: failed to set initial mode for %s: %d\n",
+			       __func__, name, ret);
+			goto out;
+		}
+	}
+
+	/* If the constraints say the regulator should be on at this point
+	 * and we have control then make sure it is enabled.
+	 */
+	if ((constraints->always_on || constraints->boot_on) && ops->enable) {
 		ret = ops->enable(rdev);
 		if (ret < 0) {
 			printk(KERN_ERR "%s: failed to enable %s\n",
@@ -817,6 +910,19 @@ static void unset_consumer_device_supply(struct regulator_dev *rdev,
 	}
 }
 
+static void unset_regulator_supplies(struct regulator_dev *rdev)
+{
+	struct regulator_map *node, *n;
+
+	list_for_each_entry_safe(node, n, &regulator_map_list, list) {
+		if (rdev == node->regulator) {
+			list_del(&node->list);
+			kfree(node);
+			return;
+		}
+	}
+}
+
 #define REG_STR_SIZE	32
 
 static struct regulator *create_regulator(struct regulator_dev *rdev,
@@ -898,9 +1004,12 @@ overflow_err:
  * @id: Supply name or regulator ID.
  *
  * Returns a struct regulator corresponding to the regulator producer,
- * or IS_ERR() condition containing errno.  Use of supply names
- * configured via regulator_set_device_supply() is strongly
- * encouraged.
+ * or IS_ERR() condition containing errno.
+ *
+ * Use of supply names configured via regulator_set_device_supply() is
+ * strongly encouraged.  It is recommended that the supply name used
+ * should match the name used for the supply and/or the relevant
+ * device pins in the datasheet.
  */
 struct regulator *regulator_get(struct device *dev, const char *id)
 {
@@ -922,8 +1031,6 @@ struct regulator *regulator_get(struct device *dev, const char *id)
 			goto found;
 		}
 	}
-	printk(KERN_ERR "regulator: Unable to get requested regulator: %s\n",
-	       id);
 	mutex_unlock(&regulator_list_mutex);
 	return regulator;
 
@@ -961,10 +1068,6 @@ void regulator_put(struct regulator *regulator)
 	mutex_lock(&regulator_list_mutex);
 	rdev = regulator->rdev;
 
-	if (WARN(regulator->enabled, "Releasing supply %s while enabled\n",
-			       regulator->supply_name))
-		_regulator_disable(rdev);
-
 	/* remove any sysfs entries */
 	if (regulator->dev) {
 		sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name);
@@ -1039,12 +1142,7 @@ int regulator_enable(struct regulator *regulator)
 	int ret = 0;
 
 	mutex_lock(&rdev->mutex);
-	if (regulator->enabled == 0)
-		ret = _regulator_enable(rdev);
-	else if (regulator->enabled < 0)
-		ret = -EIO;
-	if (ret == 0)
-		regulator->enabled++;
+	ret = _regulator_enable(rdev);
 	mutex_unlock(&rdev->mutex);
 	return ret;
 }
@@ -1055,6 +1153,11 @@ static int _regulator_disable(struct regulator_dev *rdev)
 {
 	int ret = 0;
 
+	if (WARN(rdev->use_count <= 0,
+			"unbalanced disables for %s\n",
+			rdev->desc->name))
+		return -EIO;
+
 	/* are we the last user and permitted to disable ? */
 	if (rdev->use_count == 1 && !rdev->constraints->always_on) {
 
@@ -1103,16 +1206,7 @@ int regulator_disable(struct regulator *regulator)
 	int ret = 0;
 
 	mutex_lock(&rdev->mutex);
-	if (regulator->enabled == 1) {
-		ret = _regulator_disable(rdev);
-		if (ret == 0)
-			regulator->uA_load = 0;
-	} else if (WARN(regulator->enabled <= 0,
-			"unbalanced disables for supply %s\n",
-			regulator->supply_name))
-		ret = -EIO;
-	if (ret == 0)
-		regulator->enabled--;
+	ret = _regulator_disable(rdev);
 	mutex_unlock(&rdev->mutex);
 	return ret;
 }
@@ -1159,7 +1253,6 @@ int regulator_force_disable(struct regulator *regulator)
 	int ret;
 
 	mutex_lock(&regulator->rdev->mutex);
-	regulator->enabled = 0;
 	regulator->uA_load = 0;
 	ret = _regulator_force_disable(regulator->rdev);
 	mutex_unlock(&regulator->rdev->mutex);
@@ -1203,6 +1296,56 @@ int regulator_is_enabled(struct regulator *regulator)
 }
 EXPORT_SYMBOL_GPL(regulator_is_enabled);
 
+/**
+ * regulator_count_voltages - count regulator_list_voltage() selectors
+ * @regulator: regulator source
+ *
+ * Returns number of selectors, or negative errno.  Selectors are
+ * numbered starting at zero, and typically correspond to bitfields
+ * in hardware registers.
+ */
+int regulator_count_voltages(struct regulator *regulator)
+{
+	struct regulator_dev	*rdev = regulator->rdev;
+
+	return rdev->desc->n_voltages ? : -EINVAL;
+}
+EXPORT_SYMBOL_GPL(regulator_count_voltages);
+
+/**
+ * regulator_list_voltage - enumerate supported voltages
+ * @regulator: regulator source
+ * @selector: identify voltage to list
+ * Context: can sleep
+ *
+ * Returns a voltage that can be passed to @regulator_set_voltage(),
+ * zero if this selector code can't be used on this sytem, or a
+ * negative errno.
+ */
+int regulator_list_voltage(struct regulator *regulator, unsigned selector)
+{
+	struct regulator_dev	*rdev = regulator->rdev;
+	struct regulator_ops	*ops = rdev->desc->ops;
+	int			ret;
+
+	if (!ops->list_voltage || selector >= rdev->desc->n_voltages)
+		return -EINVAL;
+
+	mutex_lock(&rdev->mutex);
+	ret = ops->list_voltage(rdev, selector);
+	mutex_unlock(&rdev->mutex);
+
+	if (ret > 0) {
+		if (ret < rdev->constraints->min_uV)
+			ret = 0;
+		else if (ret > rdev->constraints->max_uV)
+			ret = 0;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(regulator_list_voltage);
+
 /**
  * regulator_set_voltage - set regulator output voltage
  * @regulator: regulator source
@@ -1243,6 +1386,7 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
 	ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV);
 
 out:
+	_notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, NULL);
 	mutex_unlock(&rdev->mutex);
 	return ret;
 }
@@ -1543,20 +1687,23 @@ int regulator_unregister_notifier(struct regulator *regulator,
 }
 EXPORT_SYMBOL_GPL(regulator_unregister_notifier);
 
-/* notify regulator consumers and downstream regulator consumers */
+/* notify regulator consumers and downstream regulator consumers.
+ * Note mutex must be held by caller.
+ */
 static void _notifier_call_chain(struct regulator_dev *rdev,
 				  unsigned long event, void *data)
 {
 	struct regulator_dev *_rdev;
 
 	/* call rdev chain first */
-	mutex_lock(&rdev->mutex);
 	blocking_notifier_call_chain(&rdev->notifier, event, NULL);
-	mutex_unlock(&rdev->mutex);
 
 	/* now notify regulator we supply */
-	list_for_each_entry(_rdev, &rdev->supply_list, slist)
-		_notifier_call_chain(_rdev, event, data);
+	list_for_each_entry(_rdev, &rdev->supply_list, slist) {
+	  mutex_lock(&_rdev->mutex);
+	  _notifier_call_chain(_rdev, event, data);
+	  mutex_unlock(&_rdev->mutex);
+	}
 }
 
 /**
@@ -1703,6 +1850,7 @@ EXPORT_SYMBOL_GPL(regulator_bulk_free);
  *
  * Called by regulator drivers to notify clients a regulator event has
  * occurred. We also notify regulator clients downstream.
+ * Note lock must be held by caller.
  */
 int regulator_notifier_call_chain(struct regulator_dev *rdev,
 				  unsigned long event, void *data)
@@ -1744,6 +1892,11 @@ static int add_regulator_attributes(struct regulator_dev *rdev)
 		if (status < 0)
 			return status;
 	}
+	if (ops->get_status) {
+		status = device_create_file(dev, &dev_attr_status);
+		if (status < 0)
+			return status;
+	}
 
 	/* some attributes are type-specific */
 	if (rdev->desc->type == REGULATOR_CURRENT) {
@@ -1828,17 +1981,18 @@ static int add_regulator_attributes(struct regulator_dev *rdev)
  * regulator_register - register regulator
  * @regulator_desc: regulator to register
  * @dev: struct device for the regulator
+ * @init_data: platform provided init data, passed through by driver
  * @driver_data: private regulator data
  *
  * Called by regulator drivers to register a regulator.
  * Returns 0 on success.
  */
 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)
 {
 	static atomic_t regulator_no = ATOMIC_INIT(0);
 	struct regulator_dev *rdev;
-	struct regulator_init_data *init_data = dev->platform_data;
 	int ret, i;
 
 	if (regulator_desc == NULL)
@@ -1945,6 +2099,7 @@ void regulator_unregister(struct regulator_dev *rdev)
 		return;
 
 	mutex_lock(&regulator_list_mutex);
+	unset_regulator_supplies(rdev);
 	list_del(&rdev->list);
 	if (rdev->supply)
 		sysfs_remove_link(&rdev->dev.kobj, "supply");
@@ -1988,6 +2143,23 @@ out:
 }
 EXPORT_SYMBOL_GPL(regulator_suspend_prepare);
 
+/**
+ * regulator_has_full_constraints - the system has fully specified constraints
+ *
+ * Calling this function will cause the regulator API to disable all
+ * regulators which have a zero use count and don't have an always_on
+ * constraint in a late_initcall.
+ *
+ * The intention is that this will become the default behaviour in a
+ * future kernel release so users are encouraged to use this facility
+ * now.
+ */
+void regulator_has_full_constraints(void)
+{
+	has_full_constraints = 1;
+}
+EXPORT_SYMBOL_GPL(regulator_has_full_constraints);
+
 /**
  * rdev_get_drvdata - get rdev regulator driver data
  * @rdev: regulator
@@ -2055,3 +2227,77 @@ static int __init regulator_init(void)
 
 /* init early to allow our consumers to complete system booting */
 core_initcall(regulator_init);
+
+static int __init regulator_init_complete(void)
+{
+	struct regulator_dev *rdev;
+	struct regulator_ops *ops;
+	struct regulation_constraints *c;
+	int enabled, ret;
+	const char *name;
+
+	mutex_lock(&regulator_list_mutex);
+
+	/* If we have a full configuration then disable any regulators
+	 * which are not in use or always_on.  This will become the
+	 * default behaviour in the future.
+	 */
+	list_for_each_entry(rdev, &regulator_list, list) {
+		ops = rdev->desc->ops;
+		c = rdev->constraints;
+
+		if (c->name)
+			name = c->name;
+		else if (rdev->desc->name)
+			name = rdev->desc->name;
+		else
+			name = "regulator";
+
+		if (!ops->disable || c->always_on)
+			continue;
+
+		mutex_lock(&rdev->mutex);
+
+		if (rdev->use_count)
+			goto unlock;
+
+		/* If we can't read the status assume it's on. */
+		if (ops->is_enabled)
+			enabled = ops->is_enabled(rdev);
+		else
+			enabled = 1;
+
+		if (!enabled)
+			goto unlock;
+
+		if (has_full_constraints) {
+			/* We log since this may kill the system if it
+			 * goes wrong. */
+			printk(KERN_INFO "%s: disabling %s\n",
+			       __func__, name);
+			ret = ops->disable(rdev);
+			if (ret != 0) {
+				printk(KERN_ERR
+				       "%s: couldn't disable %s: %d\n",
+				       __func__, name, ret);
+			}
+		} else {
+			/* The intention is that in future we will
+			 * assume that full constraints are provided
+			 * so warn even if we aren't going to do
+			 * anything here.
+			 */
+			printk(KERN_WARNING
+			       "%s: incomplete constraints, leaving %s on\n",
+			       __func__, name);
+		}
+
+unlock:
+		mutex_unlock(&rdev->mutex);
+	}
+
+	mutex_unlock(&regulator_list_mutex);
+
+	return 0;
+}
+late_initcall(regulator_init_complete);

drivers/regulator/da903x.c

@@ -471,7 +471,8 @@ static int __devinit da903x_regulator_probe(struct platform_device *pdev)
 	if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
 		ri->desc.ops = &da9030_regulator_ldo1_15_ops;
 
-	rdev = regulator_register(&ri->desc, &pdev->dev, ri);
+	rdev = regulator_register(&ri->desc, &pdev->dev,
+				  pdev->dev.platform_data, ri);
 	if (IS_ERR(rdev)) {
 		dev_err(&pdev->dev, "failed to register regulator %s\n",
 				ri->desc.name);

drivers/regulator/fixed.c

@@ -73,7 +73,8 @@ static int regulator_fixed_voltage_probe(struct platform_device *pdev)
 
 	drvdata->microvolts = config->microvolts;
 
-	drvdata->dev = regulator_register(&drvdata->desc, drvdata);
+	drvdata->dev = regulator_register(&drvdata->desc, &pdev->dev,
+					  config->init_data, drvdata);
 	if (IS_ERR(drvdata->dev)) {
 		ret = PTR_ERR(drvdata->dev);
 		goto err_name;

drivers/regulator/pcf50633-regulator.c

@@ -284,7 +284,8 @@ static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
 	/* Already set by core driver */
 	pcf = platform_get_drvdata(pdev);
 
-	rdev = regulator_register(&regulators[pdev->id], &pdev->dev, pcf);
+	rdev = regulator_register(&regulators[pdev->id], &pdev->dev,
+				  pdev->dev.platform_data, pcf);
 	if (IS_ERR(rdev))
 		return PTR_ERR(rdev);
 

drivers/regulator/twl4030-regulator.c

+/*
+ * twl4030-regulator.c -- support regulators in twl4030 family chips
+ *
+ * Copyright (C) 2008 David Brownell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/i2c/twl4030.h>
+
+
+/*
+ * The TWL4030/TW5030/TPS659x0 family chips include power management, a
+ * USB OTG transceiver, an RTC, ADC, PWM, and lots more.  Some versions
+ * include an audio codec, battery charger, and more voltage regulators.
+ * These chips are often used in OMAP-based systems.
+ *
+ * This driver implements software-based resource control for various
+ * voltage regulators.  This is usually augmented with state machine
+ * based control.
+ */
+
+struct twlreg_info {
+	/* start of regulator's PM_RECEIVER control register bank */
+	u8			base;
+
+	/* twl4030 resource ID, for resource control state machine */
+	u8			id;
+
+	/* voltage in mV = table[VSEL]; table_len must be a power-of-two */
+	u8			table_len;
+	const u16		*table;
+
+	/* chip constraints on regulator behavior */
+	u16			min_mV;
+
+	/* used by regulator core */
+	struct regulator_desc	desc;
+};
+
+
+/* LDO control registers ... offset is from the base of its register bank.
+ * The first three registers of all power resource banks help hardware to
+ * manage the various resource groups.
+ */
+#define VREG_GRP		0
+#define VREG_TYPE		1
+#define VREG_REMAP		2
+#define VREG_DEDICATED		3	/* LDO control */
+
+
+static inline int
+twl4030reg_read(struct twlreg_info *info, unsigned offset)
+{
+	u8 value;
+	int status;
+
+	status = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER,
+			&value, info->base + offset);
+	return (status < 0) ? status : value;
+}
+
+static inline int
+twl4030reg_write(struct twlreg_info *info, unsigned offset, u8 value)
+{
+	return twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+			value, info->base + offset);
+}
+
+/*----------------------------------------------------------------------*/
+
+/* generic power resource operations, which work on all regulators */
+
+static int twl4030reg_grp(struct regulator_dev *rdev)
+{
+	return twl4030reg_read(rdev_get_drvdata(rdev), VREG_GRP);
+}
+
+/*
+ * Enable/disable regulators by joining/leaving the P1 (processor) group.
+ * We assume nobody else is updating the DEV_GRP registers.
+ */
+
+#define P3_GRP		BIT(7)		/* "peripherals" */
+#define P2_GRP		BIT(6)		/* secondary processor, modem, etc */
+#define P1_GRP		BIT(5)		/* CPU/Linux */
+
+static int twl4030reg_is_enabled(struct regulator_dev *rdev)
+{
+	int	state = twl4030reg_grp(rdev);
+
+	if (state < 0)
+		return state;
+
+	return (state & P1_GRP) != 0;
+}
+
+static int twl4030reg_enable(struct regulator_dev *rdev)
+{
+	struct twlreg_info	*info = rdev_get_drvdata(rdev);
+	int			grp;
+
+	grp = twl4030reg_read(info, VREG_GRP);
+	if (grp < 0)
+		return grp;
+
+	grp |= P1_GRP;
+	return twl4030reg_write(info, VREG_GRP, grp);
+}
+
+static int twl4030reg_disable(struct regulator_dev *rdev)
+{
+	struct twlreg_info	*info = rdev_get_drvdata(rdev);
+	int			grp;
+
+	grp = twl4030reg_read(info, VREG_GRP);
+	if (grp < 0)
+		return grp;
+
+	grp &= ~P1_GRP;
+	return twl4030reg_write(info, VREG_GRP, grp);
+}
+
+static int twl4030reg_get_status(struct regulator_dev *rdev)
+{
+	int	state = twl4030reg_grp(rdev);
+
+	if (state < 0)
+		return state;
+	state &= 0x0f;
+
+	/* assume state != WARM_RESET; we'd not be running...  */
+	if (!state)
+		return REGULATOR_STATUS_OFF;
+	return (state & BIT(3))
+		? REGULATOR_STATUS_NORMAL
+		: REGULATOR_STATUS_STANDBY;
+}
+
+static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
+{
+	struct twlreg_info	*info = rdev_get_drvdata(rdev);
+	unsigned		message;
+	int			status;
+
+	/* We can only set the mode through state machine commands... */
+	switch (mode) {
+	case REGULATOR_MODE_NORMAL:
+		message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
+		break;
+	case REGULATOR_MODE_STANDBY:
+		message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Ensure the resource is associated with some group */
+	status = twl4030reg_grp(rdev);
+	if (status < 0)
+		return status;
+	if (!(status & (P3_GRP | P2_GRP | P1_GRP)))
+		return -EACCES;
+
+	status = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
+			message >> 8, 0x15 /* PB_WORD_MSB */ );
+	if (status >= 0)
+		return status;
+
+	return twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
+			message, 0x16 /* PB_WORD_LSB */ );
+}
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
+ * select field in its control register.   We use tables indexed by VSEL
+ * to record voltages in milliVolts.  (Accuracy is about three percent.)
+ *
+ * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
+ * currently handled by listing two slightly different VAUX2 regulators,
+ * only one of which will be configured.
+ *
+ * VSEL values documented as "TI cannot support these values" are flagged
+ * in these tables as UNSUP() values; we normally won't assign them.
+ *
+ * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
+ * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
+ */
+#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
+#define UNSUP_MASK	0x0000
+#else
+#define UNSUP_MASK	0x8000
+#endif
+
+#define UNSUP(x)	(UNSUP_MASK | (x))
+#define IS_UNSUP(x)	(UNSUP_MASK & (x))
+#define LDO_MV(x)	(~UNSUP_MASK & (x))
+
+
+static const u16 VAUX1_VSEL_table[] = {
+	UNSUP(1500), UNSUP(1800), 2500, 2800,
+	3000, 3000, 3000, 3000,
+};
+static const u16 VAUX2_4030_VSEL_table[] = {
+	UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
+	1500, 1800, UNSUP(1850), 2500,
+	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
+	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
+};
+static const u16 VAUX2_VSEL_table[] = {
+	1700, 1700, 1900, 1300,
+	1500, 1800, 2000, 2500,
+	2100, 2800, 2200, 2300,
+	2400, 2400, 2400, 2400,
+};
+static const u16 VAUX3_VSEL_table[] = {
+	1500, 1800, 2500, 2800,
+	3000, 3000, 3000, 3000,
+};
+static const u16 VAUX4_VSEL_table[] = {
+	700, 1000, 1200, UNSUP(1300),
+	1500, 1800, UNSUP(1850), 2500,
+	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
+	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
+};
+static const u16 VMMC1_VSEL_table[] = {
+	1850, 2850, 3000, 3150,
+};
+static const u16 VMMC2_VSEL_table[] = {
+	UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
+	UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
+	2600, 2800, 2850, 3000,
+	3150, 3150, 3150, 3150,
+};
+static const u16 VPLL1_VSEL_table[] = {
+	1000, 1200, 1300, 1800,
+	UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
+};
+static const u16 VPLL2_VSEL_table[] = {
+	700, 1000, 1200, 1300,
+	UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
+	UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
+	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
+};
+static const u16 VSIM_VSEL_table[] = {
+	UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
+	2800, 3000, 3000, 3000,
+};
+static const u16 VDAC_VSEL_table[] = {
+	1200, 1300, 1800, 1800,
+};
+
+
+static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
+{
+	struct twlreg_info	*info = rdev_get_drvdata(rdev);
+	int			mV = info->table[index];
+
+	return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
+}
+
+static int
+twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
+{
+	struct twlreg_info	*info = rdev_get_drvdata(rdev);
+	int			vsel;
+
+	for (vsel = 0; vsel < info->table_len; vsel++) {
+		int mV = info->table[vsel];
+		int uV;
+
+		if (IS_UNSUP(mV))
+			continue;
+		uV = LDO_MV(mV) * 1000;
+
+		/* REVISIT for VAUX2, first match may not be best/lowest */
+
+		/* use the first in-range value */
+		if (min_uV <= uV && uV <= max_uV)
+			return twl4030reg_write(info, VREG_DEDICATED, vsel);
+	}
+
+	return -EDOM;
+}
+
+static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
+{
+	struct twlreg_info	*info = rdev_get_drvdata(rdev);
+	int			vsel = twl4030reg_read(info, VREG_DEDICATED);
+
+	if (vsel < 0)
+		return vsel;
+
+	vsel &= info->table_len - 1;
+	return LDO_MV(info->table[vsel]) * 1000;
+}
+
+static struct regulator_ops twl4030ldo_ops = {
+	.list_voltage	= twl4030ldo_list_voltage,
+
+	.set_voltage	= twl4030ldo_set_voltage,
+	.get_voltage	= twl4030ldo_get_voltage,
+
+	.enable		= twl4030reg_enable,
+	.disable	= twl4030reg_disable,
+	.is_enabled	= twl4030reg_is_enabled,
+
+	.set_mode	= twl4030reg_set_mode,
+
+	.get_status	= twl4030reg_get_status,
+};
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * Fixed voltage LDOs don't have a VSEL field to update.
+ */
+static int twl4030fixed_list_voltage(struct regulator_dev *rdev, unsigned index)
+{
+	struct twlreg_info	*info = rdev_get_drvdata(rdev);
+
+	return info->min_mV * 1000;
+}
+
+static int twl4030fixed_get_voltage(struct regulator_dev *rdev)
+{
+	struct twlreg_info	*info = rdev_get_drvdata(rdev);
+
+	return info->min_mV * 1000;
+}
+
+static struct regulator_ops twl4030fixed_ops = {
+	.list_voltage	= twl4030fixed_list_voltage,
+
+	.get_voltage	= twl4030fixed_get_voltage,
+
+	.enable		= twl4030reg_enable,
+	.disable	= twl4030reg_disable,
+	.is_enabled	= twl4030reg_is_enabled,
+
+	.set_mode	= twl4030reg_set_mode,
+
+	.get_status	= twl4030reg_get_status,
+};
+
+/*----------------------------------------------------------------------*/
+
+#define TWL_ADJUSTABLE_LDO(label, offset, num) { \
+	.base = offset, \
+	.id = num, \
+	.table_len = ARRAY_SIZE(label##_VSEL_table), \
+	.table = label##_VSEL_table, \
+	.desc = { \
+		.name = #label, \
+		.id = TWL4030_REG_##label, \
+		.n_voltages = ARRAY_SIZE(label##_VSEL_table), \
+		.ops = &twl4030ldo_ops, \
+		.type = REGULATOR_VOLTAGE, \
+		.owner = THIS_MODULE, \
+		}, \
+	}
+
+#define TWL_FIXED_LDO(label, offset, mVolts, num) { \
+	.base = offset, \
+	.id = num, \
+	.min_mV = mVolts, \
+	.desc = { \
+		.name = #label, \
+		.id = TWL4030_REG_##label, \
+		.n_voltages = 1, \
+		.ops = &twl4030fixed_ops, \
+		.type = REGULATOR_VOLTAGE, \
+		.owner = THIS_MODULE, \
+		}, \
+	}
+
+/*
+ * We list regulators here if systems need some level of
+ * software control over them after boot.
+ */
+static struct twlreg_info twl4030_regs[] = {
+	TWL_ADJUSTABLE_LDO(VAUX1, 0x17, 1),
+	TWL_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2),
+	TWL_ADJUSTABLE_LDO(VAUX2, 0x1b, 2),
+	TWL_ADJUSTABLE_LDO(VAUX3, 0x1f, 3),
+	TWL_ADJUSTABLE_LDO(VAUX4, 0x23, 4),
+	TWL_ADJUSTABLE_LDO(VMMC1, 0x27, 5),
+	TWL_ADJUSTABLE_LDO(VMMC2, 0x2b, 6),
+	/*
+	TWL_ADJUSTABLE_LDO(VPLL1, 0x2f, 7),
+	*/
+	TWL_ADJUSTABLE_LDO(VPLL2, 0x33, 8),
+	TWL_ADJUSTABLE_LDO(VSIM, 0x37, 9),
+	TWL_ADJUSTABLE_LDO(VDAC, 0x3b, 10),
+	/*
+	TWL_ADJUSTABLE_LDO(VINTANA1, 0x3f, 11),
+	TWL_ADJUSTABLE_LDO(VINTANA2, 0x43, 12),
+	TWL_ADJUSTABLE_LDO(VINTDIG, 0x47, 13),
+	TWL_SMPS(VIO, 0x4b, 14),
+	TWL_SMPS(VDD1, 0x55, 15),
+	TWL_SMPS(VDD2, 0x63, 16),
+	 */
+	TWL_FIXED_LDO(VUSB1V5, 0x71, 1500, 17),
+	TWL_FIXED_LDO(VUSB1V8, 0x74, 1800, 18),
+	TWL_FIXED_LDO(VUSB3V1, 0x77, 3100, 19),
+	/* VUSBCP is managed *only* by the USB subchip */
+};
+
+static int twl4030reg_probe(struct platform_device *pdev)
+{
+	int				i;
+	struct twlreg_info		*info;
+	struct regulator_init_data	*initdata;
+	struct regulation_constraints	*c;
+	struct regulator_dev		*rdev;
+
+	for (i = 0, info = NULL; i < ARRAY_SIZE(twl4030_regs); i++) {
+		if (twl4030_regs[i].desc.id != pdev->id)
+			continue;
+		info = twl4030_regs + i;
+		break;
+	}
+	if (!info)
+		return -ENODEV;
+
+	initdata = pdev->dev.platform_data;
+	if (!initdata)
+		return -EINVAL;
+
+	/* Constrain board-specific capabilities according to what
+	 * this driver and the chip itself can actually do.
+	 */
+	c = &initdata->constraints;
+	c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
+	c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
+				| REGULATOR_CHANGE_MODE
+				| REGULATOR_CHANGE_STATUS;
+
+	rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
+	if (IS_ERR(rdev)) {
+		dev_err(&pdev->dev, "can't register %s, %ld\n",
+				info->desc.name, PTR_ERR(rdev));
+		return PTR_ERR(rdev);
+	}
+	platform_set_drvdata(pdev, rdev);
+
+	/* NOTE:  many regulators support short-circuit IRQs (presentable
+	 * as REGULATOR_OVER_CURRENT notifications?) configured via:
+	 *  - SC_CONFIG
+	 *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
+	 *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
+	 *  - IT_CONFIG
+	 */
+
+	return 0;
+}
+
+static int __devexit twl4030reg_remove(struct platform_device *pdev)
+{
+	regulator_unregister(platform_get_drvdata(pdev));
+	return 0;
+}
+
+MODULE_ALIAS("platform:twl4030_reg");
+
+static struct platform_driver twl4030reg_driver = {
+	.probe		= twl4030reg_probe,
+	.remove		= __devexit_p(twl4030reg_remove),
+	/* NOTE: short name, to work around driver model truncation of
+	 * "twl4030_regulator.12" (and friends) to "twl4030_regulator.1".
+	 */
+	.driver.name	= "twl4030_reg",
+	.driver.owner	= THIS_MODULE,
+};
+
+static int __init twl4030reg_init(void)
+{
+	return platform_driver_register(&twl4030reg_driver);
+}
+subsys_initcall(twl4030reg_init);
+
+static void __exit twl4030reg_exit(void)
+{
+	platform_driver_unregister(&twl4030reg_driver);
+}
+module_exit(twl4030reg_exit)
+
+MODULE_DESCRIPTION("TWL4030 regulator driver");
+MODULE_LICENSE("GPL");

drivers/regulator/virtual.c

@@ -226,13 +226,17 @@ static ssize_t set_mode(struct device *dev, struct device_attribute *attr,
 	unsigned int mode;
 	int ret;
 
-	if (strncmp(buf, "fast", strlen("fast")) == 0)
+	/*
+	 * sysfs_streq() doesn't need the \n's, but we add them so the strings
+	 * will be shared with show_mode(), above.
+	 */
+	if (sysfs_streq(buf, "fast\n") == 0)
 		mode = REGULATOR_MODE_FAST;
-	else if (strncmp(buf, "normal", strlen("normal")) == 0)
+	else if (sysfs_streq(buf, "normal\n") == 0)
 		mode = REGULATOR_MODE_NORMAL;
-	else if (strncmp(buf, "idle", strlen("idle")) == 0)
+	else if (sysfs_streq(buf, "idle\n") == 0)
 		mode = REGULATOR_MODE_IDLE;
-	else if (strncmp(buf, "standby", strlen("standby")) == 0)
+	else if (sysfs_streq(buf, "standby\n") == 0)
 		mode = REGULATOR_MODE_STANDBY;
 	else {
 		dev_err(dev, "Configuring invalid mode\n");
@@ -256,7 +260,7 @@ static DEVICE_ATTR(min_microamps, 0666, show_min_uA, set_min_uA);
 static DEVICE_ATTR(max_microamps, 0666, show_max_uA, set_max_uA);
 static DEVICE_ATTR(mode, 0666, show_mode, set_mode);
 
-struct device_attribute *attributes[] = {
+static struct device_attribute *attributes[] = {
 	&dev_attr_min_microvolts,
 	&dev_attr_max_microvolts,
 	&dev_attr_min_microamps,

drivers/regulator/wm8350-regulator.c

@@ -24,6 +24,9 @@
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 
+/* Maximum value possible for VSEL */
+#define WM8350_DCDC_MAX_VSEL 0x66
+
 /* Microamps */
 static const int isink_cur[] = {
 	4,
@@ -385,6 +388,14 @@ static int wm8350_dcdc_get_voltage(struct regulator_dev *rdev)
 	return wm8350_dcdc_val_to_mvolts(val) * 1000;
 }
 
+static int wm8350_dcdc_list_voltage(struct regulator_dev *rdev,
+				    unsigned selector)
+{
+	if (selector > WM8350_DCDC_MAX_VSEL)
+		return -EINVAL;
+	return wm8350_dcdc_val_to_mvolts(selector) * 1000;
+}
+
 static int wm8350_dcdc_set_suspend_voltage(struct regulator_dev *rdev, int uV)
 {
 	struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
@@ -775,6 +786,14 @@ static int wm8350_ldo_get_voltage(struct regulator_dev *rdev)
 	return wm8350_ldo_val_to_mvolts(val) * 1000;
 }
 
+static int wm8350_ldo_list_voltage(struct regulator_dev *rdev,
+				    unsigned selector)
+{
+	if (selector > WM8350_LDO1_VSEL_MASK)
+		return -EINVAL;
+	return wm8350_ldo_val_to_mvolts(selector) * 1000;
+}
+
 int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start,
 			 u16 stop, u16 fault)
 {
@@ -1031,18 +1050,30 @@ static unsigned int wm8350_dcdc_get_mode(struct regulator_dev *rdev)
 	int dcdc = rdev_get_id(rdev);
 	u16 mask, sleep, active, force;
 	int mode = REGULATOR_MODE_NORMAL;
+	int reg;
 
-	if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6)
-		return -EINVAL;
-
-	if (dcdc == WM8350_DCDC_2 || dcdc == WM8350_DCDC_5)
+	switch (dcdc) {
+	case WM8350_DCDC_1:
+		reg = WM8350_DCDC1_FORCE_PWM;
+		break;
+	case WM8350_DCDC_3:
+		reg = WM8350_DCDC3_FORCE_PWM;
+		break;
+	case WM8350_DCDC_4:
+		reg = WM8350_DCDC4_FORCE_PWM;
+		break;
+	case WM8350_DCDC_6:
+		reg = WM8350_DCDC6_FORCE_PWM;
+		break;
+	default:
 		return -EINVAL;
+	}
 
 	mask = 1 << (dcdc - WM8350_DCDC_1);
 	active = wm8350_reg_read(wm8350, WM8350_DCDC_ACTIVE_OPTIONS) & mask;
+	force = wm8350_reg_read(wm8350, reg) & WM8350_DCDC1_FORCE_PWM_ENA;
 	sleep = wm8350_reg_read(wm8350, WM8350_DCDC_SLEEP_OPTIONS) & mask;
-	force = wm8350_reg_read(wm8350, WM8350_DCDC1_FORCE_PWM)
-	    & WM8350_DCDC1_FORCE_PWM_ENA;
+
 	dev_dbg(wm8350->dev, "mask %x active %x sleep %x force %x",
 		mask, active, sleep, force);
 
@@ -1150,6 +1181,7 @@ static int wm8350_ldo_is_enabled(struct regulator_dev *rdev)
 static struct regulator_ops wm8350_dcdc_ops = {
 	.set_voltage = wm8350_dcdc_set_voltage,
 	.get_voltage = wm8350_dcdc_get_voltage,
+	.list_voltage = wm8350_dcdc_list_voltage,
 	.enable = wm8350_dcdc_enable,
 	.disable = wm8350_dcdc_disable,
 	.get_mode = wm8350_dcdc_get_mode,
@@ -1173,6 +1205,7 @@ static struct regulator_ops wm8350_dcdc2_5_ops = {
 static struct regulator_ops wm8350_ldo_ops = {
 	.set_voltage = wm8350_ldo_set_voltage,
 	.get_voltage = wm8350_ldo_get_voltage,
+	.list_voltage = wm8350_ldo_list_voltage,
 	.enable = wm8350_ldo_enable,
 	.disable = wm8350_ldo_disable,
 	.is_enabled = wm8350_ldo_is_enabled,
@@ -1197,6 +1230,7 @@ static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
 		.ops = &wm8350_dcdc_ops,
 		.irq = WM8350_IRQ_UV_DC1,
 		.type = REGULATOR_VOLTAGE,
+		.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
 		.owner = THIS_MODULE,
 	},
 	{
@@ -1213,6 +1247,7 @@ static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
 		.ops = &wm8350_dcdc_ops,
 		.irq = WM8350_IRQ_UV_DC3,
 		.type = REGULATOR_VOLTAGE,
+		.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
 		.owner = THIS_MODULE,
 	},
 	{
@@ -1221,6 +1256,7 @@ static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
 		.ops = &wm8350_dcdc_ops,
 		.irq = WM8350_IRQ_UV_DC4,
 		.type = REGULATOR_VOLTAGE,
+		.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
 		.owner = THIS_MODULE,
 	},
 	{
@@ -1237,6 +1273,7 @@ static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
 		.ops = &wm8350_dcdc_ops,
 		.irq = WM8350_IRQ_UV_DC6,
 		.type = REGULATOR_VOLTAGE,
+		.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
 		.owner = THIS_MODULE,
 	},
 	{
@@ -1245,6 +1282,7 @@ static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
 		.ops = &wm8350_ldo_ops,
 		.irq = WM8350_IRQ_UV_LDO1,
 		.type = REGULATOR_VOLTAGE,
+		.n_voltages = WM8350_LDO1_VSEL_MASK + 1,
 		.owner = THIS_MODULE,
 	},
 	{
@@ -1253,6 +1291,7 @@ static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
 		.ops = &wm8350_ldo_ops,
 		.irq = WM8350_IRQ_UV_LDO2,
 		.type = REGULATOR_VOLTAGE,
+		.n_voltages = WM8350_LDO2_VSEL_MASK + 1,
 		.owner = THIS_MODULE,
 	},
 	{
@@ -1261,6 +1300,7 @@ static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
 		.ops = &wm8350_ldo_ops,
 		.irq = WM8350_IRQ_UV_LDO3,
 		.type = REGULATOR_VOLTAGE,
+		.n_voltages = WM8350_LDO3_VSEL_MASK + 1,
 		.owner = THIS_MODULE,
 	},
 	{
@@ -1269,6 +1309,7 @@ static struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
 		.ops = &wm8350_ldo_ops,
 		.irq = WM8350_IRQ_UV_LDO4,
 		.type = REGULATOR_VOLTAGE,
+		.n_voltages = WM8350_LDO4_VSEL_MASK + 1,
 		.owner = THIS_MODULE,
 	},
 	{
@@ -1293,6 +1334,7 @@ static void pmic_uv_handler(struct wm8350 *wm8350, int irq, void *data)
 {
 	struct regulator_dev *rdev = (struct regulator_dev *)data;
 
+	mutex_lock(&rdev->mutex);
 	if (irq == WM8350_IRQ_CS1 || irq == WM8350_IRQ_CS2)
 		regulator_notifier_call_chain(rdev,
 					      REGULATOR_EVENT_REGULATION_OUT,
@@ -1301,6 +1343,7 @@ static void pmic_uv_handler(struct wm8350 *wm8350, int irq, void *data)
 		regulator_notifier_call_chain(rdev,
 					      REGULATOR_EVENT_UNDER_VOLTAGE,
 					      wm8350);
+	mutex_unlock(&rdev->mutex);
 }
 
 static int wm8350_regulator_probe(struct platform_device *pdev)
@@ -1333,9 +1376,9 @@ static int wm8350_regulator_probe(struct platform_device *pdev)
 		break;
 	}
 
-
 	/* register regulator */
 	rdev = regulator_register(&wm8350_reg[pdev->id], &pdev->dev,
+				  pdev->dev.platform_data,
 				  dev_get_drvdata(&pdev->dev));
 	if (IS_ERR(rdev)) {
 		dev_err(&pdev->dev, "failed to register %s\n",

drivers/regulator/wm8400-regulator.c

@@ -43,6 +43,18 @@ static int wm8400_ldo_disable(struct regulator_dev *dev)
 			       WM8400_LDO1_ENA, 0);
 }
 
+static int wm8400_ldo_list_voltage(struct regulator_dev *dev,
+				   unsigned selector)
+{
+	if (selector > WM8400_LDO1_VSEL_MASK)
+		return -EINVAL;
+
+	if (selector < 15)
+		return 900000 + (selector * 50000);
+	else
+		return 1600000 + ((selector - 14) * 100000);
+}
+
 static int wm8400_ldo_get_voltage(struct regulator_dev *dev)
 {
 	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
@@ -51,10 +63,7 @@ static int wm8400_ldo_get_voltage(struct regulator_dev *dev)
 	val = wm8400_reg_read(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev));
 	val &= WM8400_LDO1_VSEL_MASK;
 
-	if (val < 15)
-		return 900000 + (val * 50000);
-	else
-		return 1600000 + ((val - 14) * 100000);
+	return wm8400_ldo_list_voltage(dev, val);
 }
 
 static int wm8400_ldo_set_voltage(struct regulator_dev *dev,
@@ -92,6 +101,7 @@ static struct regulator_ops wm8400_ldo_ops = {
 	.is_enabled = wm8400_ldo_is_enabled,
 	.enable = wm8400_ldo_enable,
 	.disable = wm8400_ldo_disable,
+	.list_voltage = wm8400_ldo_list_voltage,
 	.get_voltage = wm8400_ldo_get_voltage,
 	.set_voltage = wm8400_ldo_set_voltage,
 };
@@ -124,6 +134,15 @@ static int wm8400_dcdc_disable(struct regulator_dev *dev)
 			       WM8400_DC1_ENA, 0);
 }
 
+static int wm8400_dcdc_list_voltage(struct regulator_dev *dev,
+				    unsigned selector)
+{
+	if (selector > WM8400_DC1_VSEL_MASK)
+		return -EINVAL;
+
+	return 850000 + (selector * 25000);
+}
+
 static int wm8400_dcdc_get_voltage(struct regulator_dev *dev)
 {
 	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
@@ -237,6 +256,7 @@ static struct regulator_ops wm8400_dcdc_ops = {
 	.is_enabled = wm8400_dcdc_is_enabled,
 	.enable = wm8400_dcdc_enable,
 	.disable = wm8400_dcdc_disable,
+	.list_voltage = wm8400_dcdc_list_voltage,
 	.get_voltage = wm8400_dcdc_get_voltage,
 	.set_voltage = wm8400_dcdc_set_voltage,
 	.get_mode = wm8400_dcdc_get_mode,
@@ -249,6 +269,7 @@ static struct regulator_desc regulators[] = {
 		.name = "LDO1",
 		.id = WM8400_LDO1,
 		.ops = &wm8400_ldo_ops,
+		.n_voltages = WM8400_LDO1_VSEL_MASK + 1,
 		.type = REGULATOR_VOLTAGE,
 		.owner = THIS_MODULE,
 	},
@@ -256,6 +277,7 @@ static struct regulator_desc regulators[] = {
 		.name = "LDO2",
 		.id = WM8400_LDO2,
 		.ops = &wm8400_ldo_ops,
+		.n_voltages = WM8400_LDO2_VSEL_MASK + 1,
 		.type = REGULATOR_VOLTAGE,
 		.owner = THIS_MODULE,
 	},
@@ -263,6 +285,7 @@ static struct regulator_desc regulators[] = {
 		.name = "LDO3",
 		.id = WM8400_LDO3,
 		.ops = &wm8400_ldo_ops,
+		.n_voltages = WM8400_LDO3_VSEL_MASK + 1,
 		.type = REGULATOR_VOLTAGE,
 		.owner = THIS_MODULE,
 	},
@@ -270,6 +293,7 @@ static struct regulator_desc regulators[] = {
 		.name = "LDO4",
 		.id = WM8400_LDO4,
 		.ops = &wm8400_ldo_ops,
+		.n_voltages = WM8400_LDO4_VSEL_MASK + 1,
 		.type = REGULATOR_VOLTAGE,
 		.owner = THIS_MODULE,
 	},
@@ -277,6 +301,7 @@ static struct regulator_desc regulators[] = {
 		.name = "DCDC1",
 		.id = WM8400_DCDC1,
 		.ops = &wm8400_dcdc_ops,
+		.n_voltages = WM8400_DC1_VSEL_MASK + 1,
 		.type = REGULATOR_VOLTAGE,
 		.owner = THIS_MODULE,
 	},
@@ -284,6 +309,7 @@ static struct regulator_desc regulators[] = {
 		.name = "DCDC2",
 		.id = WM8400_DCDC2,
 		.ops = &wm8400_dcdc_ops,
+		.n_voltages = WM8400_DC2_VSEL_MASK + 1,
 		.type = REGULATOR_VOLTAGE,
 		.owner = THIS_MODULE,
 	},
@@ -294,7 +320,7 @@ static int __devinit wm8400_regulator_probe(struct platform_device *pdev)
 	struct regulator_dev *rdev;
 
 	rdev = regulator_register(&regulators[pdev->id], &pdev->dev,
-		pdev->dev.driver_data);
+		pdev->dev.platform_data, pdev->dev.driver_data);
 
 	if (IS_ERR(rdev))
 		return PTR_ERR(rdev);

include/linux/i2c/twl4030.h

@@ -218,6 +218,53 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 
 /*----------------------------------------------------------------------*/
 
+/* Power bus message definitions */
+
+#define DEV_GRP_NULL		0x0
+#define DEV_GRP_P1		0x1
+#define DEV_GRP_P2		0x2
+#define DEV_GRP_P3		0x4
+
+#define RES_GRP_RES		0x0
+#define RES_GRP_PP		0x1
+#define RES_GRP_RC		0x2
+#define RES_GRP_PP_RC		0x3
+#define RES_GRP_PR		0x4
+#define RES_GRP_PP_PR		0x5
+#define RES_GRP_RC_PR		0x6
+#define RES_GRP_ALL		0x7
+
+#define RES_TYPE2_R0		0x0
+
+#define RES_TYPE_ALL		0x7
+
+#define RES_STATE_WRST		0xF
+#define RES_STATE_ACTIVE	0xE
+#define RES_STATE_SLEEP		0x8
+#define RES_STATE_OFF		0x0
+
+/*
+ * Power Bus Message Format ... these can be sent individually by Linux,
+ * but are usually part of downloaded scripts that are run when various
+ * power events are triggered.
+ *
+ *  Broadcast Message (16 Bits):
+ *    DEV_GRP[15:13] MT[12]  RES_GRP[11:9]  RES_TYPE2[8:7] RES_TYPE[6:4]
+ *    RES_STATE[3:0]
+ *
+ *  Singular Message (16 Bits):
+ *    DEV_GRP[15:13] MT[12]  RES_ID[11:4]  RES_STATE[3:0]
+ */
+
+#define MSG_BROADCAST(devgrp, grp, type, type2, state) \
+	( (devgrp) << 13 | 1 << 12 | (grp) << 9 | (type2) << 7 \
+	| (type) << 4 | (state))
+
+#define MSG_SINGULAR(devgrp, id, state) \
+	((devgrp) << 13 | 0 << 12 | (id) << 4 | (state))
+
+/*----------------------------------------------------------------------*/
+
 struct twl4030_bci_platform_data {
 	int *battery_tmp_tbl;
 	unsigned int tblsize;

include/linux/mmc/host.h

@@ -192,5 +192,10 @@ static inline void mmc_signal_sdio_irq(struct mmc_host *host)
 	wake_up_process(host->sdio_irq_thread);
 }
 
+struct regulator;
+
+int mmc_regulator_get_ocrmask(struct regulator *supply);
+int mmc_regulator_set_ocr(struct regulator *supply, unsigned short vdd_bit);
+
 #endif
 

include/linux/regulator/bq24022.h

@@ -10,6 +10,8 @@
  *
  */
 
+struct regulator_init_data;
+
 /**
  * bq24022_mach_info - platform data for bq24022
  * @gpio_nce: GPIO line connected to the nCE pin, used to enable / disable charging
@@ -18,4 +20,5 @@
 struct bq24022_mach_info {
 	int gpio_nce;
 	int gpio_iset2;
+	struct regulator_init_data *init_data;
 };

include/linux/regulator/consumer.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
@@ -88,6 +88,7 @@
  * FAIL           Regulator output has failed.
  * OVER_TEMP      Regulator over temp.
  * FORCE_DISABLE  Regulator shut down by software.
+ * VOLTAGE_CHANGE Regulator voltage changed.
  *
  * NOTE: These events can be OR'ed together when passed into handler.
  */
@@ -98,6 +99,7 @@
 #define REGULATOR_EVENT_FAIL			0x08
 #define REGULATOR_EVENT_OVER_TEMP		0x10
 #define REGULATOR_EVENT_FORCE_DISABLE		0x20
+#define REGULATOR_EVENT_VOLTAGE_CHANGE		0x40
 
 struct regulator;
 
@@ -140,6 +142,8 @@ int regulator_bulk_disable(int num_consumers,
 void regulator_bulk_free(int num_consumers,
 			 struct regulator_bulk_data *consumers);
 
+int regulator_count_voltages(struct regulator *regulator);
+int regulator_list_voltage(struct regulator *regulator, unsigned selector);
 int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV);
 int regulator_get_voltage(struct regulator *regulator);
 int regulator_set_current_limit(struct regulator *regulator,

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 +21,38 @@
 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.
+ * @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 +64,15 @@ 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 +91,13 @@ 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 +132,7 @@ 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 +141,48 @@ 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,

include/linux/regulator/fixed.h

@@ -14,9 +14,12 @@
 #ifndef __REGULATOR_FIXED_H
 #define __REGULATOR_FIXED_H
 
+struct regulator_init_data;
+
 struct fixed_voltage_config {
 	const char *supply_name;
 	int microvolts;
+	struct regulator_init_data *init_data;
 };
 
 #endif

include/linux/regulator/machine.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
@@ -73,7 +73,9 @@ struct regulator_state {
  *
  * @always_on: Set if the regulator should never be disabled.
  * @boot_on: Set if the regulator is enabled when the system is initially
- *           started.
+ *           started.  If the regulator is not enabled by the hardware or
+ *           bootloader then it will be enabled when the constraints are
+ *           applied.
  * @apply_uV: Apply the voltage constraint when initialising.
  *
  * @input_uV: Input voltage for regulator when supplied by another regulator.
@@ -83,6 +85,7 @@ struct regulator_state {
  * @state_standby: State for regulator when system is suspended in standby
  *                 mode.
  * @initial_state: Suspend state to set by default.
+ * @initial_mode: Mode to set at startup.
  */
 struct regulation_constraints {
 
@@ -111,6 +114,9 @@ struct regulation_constraints {
 	struct regulator_state state_standby;
 	suspend_state_t initial_state; /* suspend state to set at init */
 
+	/* mode to set on startup */
+	unsigned int initial_mode;
+
 	/* constriant flags */
 	unsigned always_on:1;	/* regulator never off when system is on */
 	unsigned boot_on:1;	/* bootloader/firmware enabled regulator */
@@ -160,4 +166,6 @@ struct regulator_init_data {
 
 int regulator_suspend_prepare(suspend_state_t state);
 
+void regulator_has_full_constraints(void);
+
 #endif