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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:
  regulator: max8952 - fix max8952_set_voltage
  regulator: max8952 - fix max8952_pmic_probe error path
  regulator: fix build when CONFIG_REGULATOR_DUMMY=n
  regulator: avoid deadlock when disabling regulator with supply
  regulator: Add option for machine drivers to enable the dummy regulator
  Regulator: lp3972 cleanup
  Regulator: LP3972 PMIC regulator driver
  MAX8952 PMIC Driver Initial Release
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2 parents a0e3390 + ec10b0e commit 9aca0e7c8c3a8f1fa6e3058abc5465b0509f0f8e @torvalds torvalds committed Oct 28, 2010
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@@ -100,6 +100,14 @@ config REGULATOR_MAX8925
help
Say y here to support the voltage regulaltor of Maxim MAX8925 PMIC.
+config REGULATOR_MAX8952
+ tristate "Maxim MAX8952 Power Management IC"
+ depends on I2C
+ help
+ This driver controls a Maxim 8952 voltage output regulator
+ via I2C bus. Maxim 8952 has one voltage output and supports 4 DVS
+ modes ranging from 0.77V to 1.40V by 0.01V steps.
+
config REGULATOR_MAX8998
tristate "Maxim 8998 voltage regulator"
depends on MFD_MAX8998
@@ -164,6 +172,13 @@ config REGULATOR_LP3971
Say Y here to support the voltage regulators and convertors
on National Semiconductors LP3971 PMIC
+config REGULATOR_LP3972
+ tristate "National Semiconductors LP3972 PMIC regulator driver"
+ depends on I2C
+ help
+ Say Y here to support the voltage regulators and convertors
+ on National Semiconductors LP3972 PMIC
+
config REGULATOR_PCAP
tristate "PCAP2 regulator driver"
depends on EZX_PCAP
@@ -3,20 +3,21 @@
#
-obj-$(CONFIG_REGULATOR) += core.o
+obj-$(CONFIG_REGULATOR) += core.o dummy.o
obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o
obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o
obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
-obj-$(CONFIG_REGULATOR_DUMMY) += dummy.o
obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
+obj-$(CONFIG_REGULATOR_LP3972) += lp3972.o
obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o
obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o
obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o
+obj-$(CONFIG_REGULATOR_MAX8952) += max8952.o
obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o
obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
View
@@ -33,6 +33,7 @@ static DEFINE_MUTEX(regulator_list_mutex);
static LIST_HEAD(regulator_list);
static LIST_HEAD(regulator_map_list);
static int has_full_constraints;
+static bool board_wants_dummy_regulator;
/*
* struct regulator_map
@@ -63,7 +64,8 @@ struct regulator {
};
static int _regulator_is_enabled(struct regulator_dev *rdev);
-static int _regulator_disable(struct regulator_dev *rdev);
+static int _regulator_disable(struct regulator_dev *rdev,
+ struct regulator_dev **supply_rdev_ptr);
static int _regulator_get_voltage(struct regulator_dev *rdev);
static int _regulator_get_current_limit(struct regulator_dev *rdev);
static unsigned int _regulator_get_mode(struct regulator_dev *rdev);
@@ -1108,6 +1110,11 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
}
}
+ if (board_wants_dummy_regulator) {
+ rdev = dummy_regulator_rdev;
+ goto found;
+ }
+
#ifdef CONFIG_REGULATOR_DUMMY
if (!devname)
devname = "deviceless";
@@ -1348,7 +1355,8 @@ int regulator_enable(struct regulator *regulator)
EXPORT_SYMBOL_GPL(regulator_enable);
/* locks held by regulator_disable() */
-static int _regulator_disable(struct regulator_dev *rdev)
+static int _regulator_disable(struct regulator_dev *rdev,
+ struct regulator_dev **supply_rdev_ptr)
{
int ret = 0;
@@ -1376,8 +1384,7 @@ static int _regulator_disable(struct regulator_dev *rdev)
}
/* decrease our supplies ref count and disable if required */
- if (rdev->supply)
- _regulator_disable(rdev->supply);
+ *supply_rdev_ptr = rdev->supply;
rdev->use_count = 0;
} else if (rdev->use_count > 1) {
@@ -1407,17 +1414,29 @@ static int _regulator_disable(struct regulator_dev *rdev)
int regulator_disable(struct regulator *regulator)
{
struct regulator_dev *rdev = regulator->rdev;
+ struct regulator_dev *supply_rdev = NULL;
int ret = 0;
mutex_lock(&rdev->mutex);
- ret = _regulator_disable(rdev);
+ ret = _regulator_disable(rdev, &supply_rdev);
mutex_unlock(&rdev->mutex);
+
+ /* decrease our supplies ref count and disable if required */
+ while (supply_rdev != NULL) {
+ rdev = supply_rdev;
+
+ mutex_lock(&rdev->mutex);
+ _regulator_disable(rdev, &supply_rdev);
+ mutex_unlock(&rdev->mutex);
+ }
+
return ret;
}
EXPORT_SYMBOL_GPL(regulator_disable);
/* locks held by regulator_force_disable() */
-static int _regulator_force_disable(struct regulator_dev *rdev)
+static int _regulator_force_disable(struct regulator_dev *rdev,
+ struct regulator_dev **supply_rdev_ptr)
{
int ret = 0;
@@ -1436,8 +1455,7 @@ static int _regulator_force_disable(struct regulator_dev *rdev)
}
/* decrease our supplies ref count and disable if required */
- if (rdev->supply)
- _regulator_disable(rdev->supply);
+ *supply_rdev_ptr = rdev->supply;
rdev->use_count = 0;
return ret;
@@ -1454,12 +1472,17 @@ static int _regulator_force_disable(struct regulator_dev *rdev)
*/
int regulator_force_disable(struct regulator *regulator)
{
+ struct regulator_dev *supply_rdev = NULL;
int ret;
mutex_lock(&regulator->rdev->mutex);
regulator->uA_load = 0;
- ret = _regulator_force_disable(regulator->rdev);
+ ret = _regulator_force_disable(regulator->rdev, &supply_rdev);
mutex_unlock(&regulator->rdev->mutex);
+
+ if (supply_rdev)
+ regulator_disable(get_device_regulator(rdev_get_dev(supply_rdev)));
+
return ret;
}
EXPORT_SYMBOL_GPL(regulator_force_disable);
@@ -2463,6 +2486,22 @@ void regulator_has_full_constraints(void)
EXPORT_SYMBOL_GPL(regulator_has_full_constraints);
/**
+ * regulator_use_dummy_regulator - Provide a dummy regulator when none is found
+ *
+ * Calling this function will cause the regulator API to provide a
+ * dummy regulator to consumers if no physical regulator is found,
+ * allowing most consumers to proceed as though a regulator were
+ * configured. This allows systems such as those with software
+ * controllable regulators for the CPU core only to be brought up more
+ * readily.
+ */
+void regulator_use_dummy_regulator(void)
+{
+ board_wants_dummy_regulator = true;
+}
+EXPORT_SYMBOL_GPL(regulator_use_dummy_regulator);
+
+/**
* rdev_get_drvdata - get rdev regulator driver data
* @rdev: regulator
*
@@ -22,10 +22,6 @@ struct regulator_dev;
extern struct regulator_dev *dummy_regulator_rdev;
-#ifdef CONFIG_REGULATOR_DUMMY
void __init regulator_dummy_init(void);
-#else
-static inline void regulator_dummy_init(void) { }
-#endif
#endif
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