mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-20 19:23:57 +08:00
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
This commit is contained in:
Linus Torvalds
commit
9aca0e7c8c
@ -100,6 +100,14 @@ config REGULATOR_MAX8925
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help
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Say y here to support the voltage regulaltor of Maxim MAX8925 PMIC.
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config REGULATOR_MAX8952
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tristate "Maxim MAX8952 Power Management IC"
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depends on I2C
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help
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This driver controls a Maxim 8952 voltage output regulator
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via I2C bus. Maxim 8952 has one voltage output and supports 4 DVS
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modes ranging from 0.77V to 1.40V by 0.01V steps.
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config REGULATOR_MAX8998
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tristate "Maxim 8998 voltage regulator"
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depends on MFD_MAX8998
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@ -164,6 +172,13 @@ config REGULATOR_LP3971
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Say Y here to support the voltage regulators and convertors
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on National Semiconductors LP3971 PMIC
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config REGULATOR_LP3972
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tristate "National Semiconductors LP3972 PMIC regulator driver"
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depends on I2C
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help
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Say Y here to support the voltage regulators and convertors
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on National Semiconductors LP3972 PMIC
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config REGULATOR_PCAP
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tristate "PCAP2 regulator driver"
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depends on EZX_PCAP
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@ -3,20 +3,21 @@
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#
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obj-$(CONFIG_REGULATOR) += core.o
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obj-$(CONFIG_REGULATOR) += core.o dummy.o
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obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
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obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
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obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o
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obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o
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obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
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obj-$(CONFIG_REGULATOR_DUMMY) += dummy.o
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obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
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obj-$(CONFIG_REGULATOR_LP3972) += lp3972.o
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obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
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obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o
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obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o
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obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
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obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o
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obj-$(CONFIG_REGULATOR_MAX8952) += max8952.o
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obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o
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obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
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obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
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@ -33,6 +33,7 @@ static DEFINE_MUTEX(regulator_list_mutex);
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static LIST_HEAD(regulator_list);
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static LIST_HEAD(regulator_map_list);
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static int has_full_constraints;
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static bool board_wants_dummy_regulator;
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/*
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* struct regulator_map
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@ -63,7 +64,8 @@ struct regulator {
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};
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static int _regulator_is_enabled(struct regulator_dev *rdev);
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static int _regulator_disable(struct regulator_dev *rdev);
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static int _regulator_disable(struct regulator_dev *rdev,
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struct regulator_dev **supply_rdev_ptr);
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static int _regulator_get_voltage(struct regulator_dev *rdev);
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static int _regulator_get_current_limit(struct regulator_dev *rdev);
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static unsigned int _regulator_get_mode(struct regulator_dev *rdev);
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@ -1108,6 +1110,11 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
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}
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}
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if (board_wants_dummy_regulator) {
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rdev = dummy_regulator_rdev;
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goto found;
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}
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#ifdef CONFIG_REGULATOR_DUMMY
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if (!devname)
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devname = "deviceless";
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@ -1348,7 +1355,8 @@ int regulator_enable(struct regulator *regulator)
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EXPORT_SYMBOL_GPL(regulator_enable);
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/* locks held by regulator_disable() */
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static int _regulator_disable(struct regulator_dev *rdev)
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static int _regulator_disable(struct regulator_dev *rdev,
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struct regulator_dev **supply_rdev_ptr)
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{
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int ret = 0;
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@ -1376,8 +1384,7 @@ static int _regulator_disable(struct regulator_dev *rdev)
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}
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/* decrease our supplies ref count and disable if required */
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if (rdev->supply)
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_regulator_disable(rdev->supply);
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*supply_rdev_ptr = rdev->supply;
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rdev->use_count = 0;
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} else if (rdev->use_count > 1) {
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@ -1407,17 +1414,29 @@ static int _regulator_disable(struct regulator_dev *rdev)
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int regulator_disable(struct regulator *regulator)
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{
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struct regulator_dev *rdev = regulator->rdev;
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struct regulator_dev *supply_rdev = NULL;
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int ret = 0;
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mutex_lock(&rdev->mutex);
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ret = _regulator_disable(rdev);
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ret = _regulator_disable(rdev, &supply_rdev);
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mutex_unlock(&rdev->mutex);
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/* decrease our supplies ref count and disable if required */
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while (supply_rdev != NULL) {
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rdev = supply_rdev;
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mutex_lock(&rdev->mutex);
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_regulator_disable(rdev, &supply_rdev);
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mutex_unlock(&rdev->mutex);
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_disable);
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/* locks held by regulator_force_disable() */
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static int _regulator_force_disable(struct regulator_dev *rdev)
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static int _regulator_force_disable(struct regulator_dev *rdev,
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struct regulator_dev **supply_rdev_ptr)
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{
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int ret = 0;
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@ -1436,8 +1455,7 @@ static int _regulator_force_disable(struct regulator_dev *rdev)
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}
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/* decrease our supplies ref count and disable if required */
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if (rdev->supply)
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_regulator_disable(rdev->supply);
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*supply_rdev_ptr = rdev->supply;
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rdev->use_count = 0;
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return ret;
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@ -1454,12 +1472,17 @@ static int _regulator_force_disable(struct regulator_dev *rdev)
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*/
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int regulator_force_disable(struct regulator *regulator)
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{
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struct regulator_dev *supply_rdev = NULL;
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int ret;
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mutex_lock(®ulator->rdev->mutex);
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regulator->uA_load = 0;
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ret = _regulator_force_disable(regulator->rdev);
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ret = _regulator_force_disable(regulator->rdev, &supply_rdev);
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mutex_unlock(®ulator->rdev->mutex);
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if (supply_rdev)
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regulator_disable(get_device_regulator(rdev_get_dev(supply_rdev)));
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_force_disable);
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@ -2462,6 +2485,22 @@ void regulator_has_full_constraints(void)
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}
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EXPORT_SYMBOL_GPL(regulator_has_full_constraints);
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/**
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* regulator_use_dummy_regulator - Provide a dummy regulator when none is found
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*
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* Calling this function will cause the regulator API to provide a
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* dummy regulator to consumers if no physical regulator is found,
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* allowing most consumers to proceed as though a regulator were
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* configured. This allows systems such as those with software
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* controllable regulators for the CPU core only to be brought up more
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* readily.
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*/
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void regulator_use_dummy_regulator(void)
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{
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board_wants_dummy_regulator = true;
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}
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EXPORT_SYMBOL_GPL(regulator_use_dummy_regulator);
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/**
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* rdev_get_drvdata - get rdev regulator driver data
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* @rdev: regulator
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@ -22,10 +22,6 @@ struct regulator_dev;
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extern struct regulator_dev *dummy_regulator_rdev;
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#ifdef CONFIG_REGULATOR_DUMMY
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void __init regulator_dummy_init(void);
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#else
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static inline void regulator_dummy_init(void) { }
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#endif
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#endif
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660
drivers/regulator/lp3972.c
Normal file
660
drivers/regulator/lp3972.c
Normal file
@ -0,0 +1,660 @@
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/*
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* Regulator driver for National Semiconductors LP3972 PMIC chip
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*
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* Based on lp3971.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/bug.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/kernel.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/lp3972.h>
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#include <linux/slab.h>
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struct lp3972 {
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struct device *dev;
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struct mutex io_lock;
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struct i2c_client *i2c;
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int num_regulators;
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struct regulator_dev **rdev;
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};
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/* LP3972 Control Registers */
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#define LP3972_SCR_REG 0x07
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#define LP3972_OVER1_REG 0x10
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#define LP3972_OVSR1_REG 0x11
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#define LP3972_OVER2_REG 0x12
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#define LP3972_OVSR2_REG 0x13
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#define LP3972_VCC1_REG 0x20
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#define LP3972_ADTV1_REG 0x23
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#define LP3972_ADTV2_REG 0x24
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#define LP3972_AVRC_REG 0x25
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#define LP3972_CDTC1_REG 0x26
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#define LP3972_CDTC2_REG 0x27
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#define LP3972_SDTV1_REG 0x29
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#define LP3972_SDTV2_REG 0x2A
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#define LP3972_MDTV1_REG 0x32
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#define LP3972_MDTV2_REG 0x33
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#define LP3972_L2VCR_REG 0x39
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#define LP3972_L34VCR_REG 0x3A
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#define LP3972_SCR1_REG 0x80
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#define LP3972_SCR2_REG 0x81
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#define LP3972_OEN3_REG 0x82
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#define LP3972_OSR3_REG 0x83
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#define LP3972_LOER4_REG 0x84
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#define LP3972_B2TV_REG 0x85
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#define LP3972_B3TV_REG 0x86
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#define LP3972_B32RC_REG 0x87
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#define LP3972_ISRA_REG 0x88
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#define LP3972_BCCR_REG 0x89
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#define LP3972_II1RR_REG 0x8E
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#define LP3972_II2RR_REG 0x8F
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#define LP3972_SYS_CONTROL1_REG LP3972_SCR1_REG
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/* System control register 1 initial value,
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* bits 5, 6 and 7 are EPROM programmable */
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#define SYS_CONTROL1_INIT_VAL 0x02
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#define SYS_CONTROL1_INIT_MASK 0x1F
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#define LP3972_VOL_CHANGE_REG LP3972_VCC1_REG
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#define LP3972_VOL_CHANGE_FLAG_GO 0x01
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#define LP3972_VOL_CHANGE_FLAG_MASK 0x03
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/* LDO output enable mask */
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#define LP3972_OEN3_L1EN BIT(0)
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#define LP3972_OVER2_LDO2_EN BIT(2)
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#define LP3972_OVER2_LDO3_EN BIT(3)
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#define LP3972_OVER2_LDO4_EN BIT(4)
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#define LP3972_OVER1_S_EN BIT(2)
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static const int ldo1_voltage_map[] = {
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1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875,
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1900, 1925, 1950, 1975, 2000,
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};
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static const int ldo23_voltage_map[] = {
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1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500,
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2600, 2700, 2800, 2900, 3000, 3100, 3200, 3300,
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};
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static const int ldo4_voltage_map[] = {
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1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350,
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1400, 1500, 1800, 1900, 2500, 2800, 3000, 3300,
|
||||
};
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||||
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||||
static const int ldo5_voltage_map[] = {
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||||
0, 0, 0, 0, 0, 850, 875, 900,
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||||
925, 950, 975, 1000, 1025, 1050, 1075, 1100,
|
||||
1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
|
||||
1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
|
||||
};
|
||||
|
||||
static const int buck1_voltage_map[] = {
|
||||
725, 750, 775, 800, 825, 850, 875, 900,
|
||||
925, 950, 975, 1000, 1025, 1050, 1075, 1100,
|
||||
1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
|
||||
1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
|
||||
};
|
||||
|
||||
static const int buck23_voltage_map[] = {
|
||||
0, 800, 850, 900, 950, 1000, 1050, 1100,
|
||||
1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500,
|
||||
1550, 1600, 1650, 1700, 1800, 1900, 2500, 2800,
|
||||
3000, 3300,
|
||||
};
|
||||
|
||||
static const int *ldo_voltage_map[] = {
|
||||
ldo1_voltage_map,
|
||||
ldo23_voltage_map,
|
||||
ldo23_voltage_map,
|
||||
ldo4_voltage_map,
|
||||
ldo5_voltage_map,
|
||||
};
|
||||
|
||||
static const int *buck_voltage_map[] = {
|
||||
buck1_voltage_map,
|
||||
buck23_voltage_map,
|
||||
buck23_voltage_map,
|
||||
};
|
||||
|
||||
static const int ldo_output_enable_mask[] = {
|
||||
LP3972_OEN3_L1EN,
|
||||
LP3972_OVER2_LDO2_EN,
|
||||
LP3972_OVER2_LDO3_EN,
|
||||
LP3972_OVER2_LDO4_EN,
|
||||
LP3972_OVER1_S_EN,
|
||||
};
|
||||
|
||||
static const int ldo_output_enable_addr[] = {
|
||||
LP3972_OEN3_REG,
|
||||
LP3972_OVER2_REG,
|
||||
LP3972_OVER2_REG,
|
||||
LP3972_OVER2_REG,
|
||||
LP3972_OVER1_REG,
|
||||
};
|
||||
|
||||
static const int ldo_vol_ctl_addr[] = {
|
||||
LP3972_MDTV1_REG,
|
||||
LP3972_L2VCR_REG,
|
||||
LP3972_L34VCR_REG,
|
||||
LP3972_L34VCR_REG,
|
||||
LP3972_SDTV1_REG,
|
||||
};
|
||||
|
||||
static const int buck_vol_enable_addr[] = {
|
||||
LP3972_OVER1_REG,
|
||||
LP3972_OEN3_REG,
|
||||
LP3972_OEN3_REG,
|
||||
};
|
||||
|
||||
static const int buck_base_addr[] = {
|
||||
LP3972_ADTV1_REG,
|
||||
LP3972_B2TV_REG,
|
||||
LP3972_B3TV_REG,
|
||||
};
|
||||
|
||||
#define LP3972_LDO_VOL_VALUE_MAP(x) (ldo_voltage_map[x])
|
||||
#define LP3972_LDO_OUTPUT_ENABLE_MASK(x) (ldo_output_enable_mask[x])
|
||||
#define LP3972_LDO_OUTPUT_ENABLE_REG(x) (ldo_output_enable_addr[x])
|
||||
|
||||
/* LDO voltage control registers shift:
|
||||
LP3972_LDO1 -> 0, LP3972_LDO2 -> 4
|
||||
LP3972_LDO3 -> 0, LP3972_LDO4 -> 4
|
||||
LP3972_LDO5 -> 0
|
||||
*/
|
||||
#define LP3972_LDO_VOL_CONTR_SHIFT(x) (((x) & 1) << 2)
|
||||
#define LP3972_LDO_VOL_CONTR_REG(x) (ldo_vol_ctl_addr[x])
|
||||
#define LP3972_LDO_VOL_CHANGE_SHIFT(x) ((x) ? 4 : 6)
|
||||
|
||||
#define LP3972_LDO_VOL_MASK(x) (((x) % 4) ? 0x0f : 0x1f)
|
||||
#define LP3972_LDO_VOL_MIN_IDX(x) (((x) == 4) ? 0x05 : 0x00)
|
||||
#define LP3972_LDO_VOL_MAX_IDX(x) ((x) ? (((x) == 4) ? 0x1f : 0x0f) : 0x0c)
|
||||
|
||||
#define LP3972_BUCK_VOL_VALUE_MAP(x) (buck_voltage_map[x])
|
||||
#define LP3972_BUCK_VOL_ENABLE_REG(x) (buck_vol_enable_addr[x])
|
||||
#define LP3972_BUCK_VOL1_REG(x) (buck_base_addr[x])
|
||||
#define LP3972_BUCK_VOL_MASK 0x1f
|
||||
#define LP3972_BUCK_VOL_MIN_IDX(x) ((x) ? 0x01 : 0x00)
|
||||
#define LP3972_BUCK_VOL_MAX_IDX(x) ((x) ? 0x19 : 0x1f)
|
||||
|
||||
static int lp3972_i2c_read(struct i2c_client *i2c, char reg, int count,
|
||||
u16 *dest)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (count != 1)
|
||||
return -EIO;
|
||||
ret = i2c_smbus_read_byte_data(i2c, reg);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
*dest = ret;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int lp3972_i2c_write(struct i2c_client *i2c, char reg, int count,
|
||||
const u16 *src)
|
||||
{
|
||||
if (count != 1)
|
||||
return -EIO;
|
||||
return i2c_smbus_write_byte_data(i2c, reg, *src);
|
||||
}
|
||||
|
||||
static u8 lp3972_reg_read(struct lp3972 *lp3972, u8 reg)
|
||||
{
|
||||
u16 val = 0;
|
||||
|
||||
mutex_lock(&lp3972->io_lock);
|
||||
|
||||
lp3972_i2c_read(lp3972->i2c, reg, 1, &val);
|
||||
|
||||
dev_dbg(lp3972->dev, "reg read 0x%02x -> 0x%02x\n", (int)reg,
|
||||
(unsigned)val & 0xff);
|
||||
|
||||
mutex_unlock(&lp3972->io_lock);
|
||||
|
||||
return val & 0xff;
|
||||
}
|
||||
|
||||
static int lp3972_set_bits(struct lp3972 *lp3972, u8 reg, u16 mask, u16 val)
|
||||
{
|
||||
u16 tmp;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&lp3972->io_lock);
|
||||
|
||||
ret = lp3972_i2c_read(lp3972->i2c, reg, 1, &tmp);
|
||||
tmp = (tmp & ~mask) | val;
|
||||
if (ret == 0) {
|
||||
ret = lp3972_i2c_write(lp3972->i2c, reg, 1, &tmp);
|
||||
dev_dbg(lp3972->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
|
||||
(unsigned)val & 0xff);
|
||||
}
|
||||
mutex_unlock(&lp3972->io_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lp3972_ldo_list_voltage(struct regulator_dev *dev, unsigned index)
|
||||
{
|
||||
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
||||
return 1000 * LP3972_LDO_VOL_VALUE_MAP(ldo)[index];
|
||||
}
|
||||
|
||||
static int lp3972_ldo_is_enabled(struct regulator_dev *dev)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
||||
u16 mask = LP3972_LDO_OUTPUT_ENABLE_MASK(ldo);
|
||||
u16 val;
|
||||
|
||||
val = lp3972_reg_read(lp3972, LP3972_LDO_OUTPUT_ENABLE_REG(ldo));
|
||||
return !!(val & mask);
|
||||
}
|
||||
|
||||
static int lp3972_ldo_enable(struct regulator_dev *dev)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
||||
u16 mask = LP3972_LDO_OUTPUT_ENABLE_MASK(ldo);
|
||||
|
||||
return lp3972_set_bits(lp3972, LP3972_LDO_OUTPUT_ENABLE_REG(ldo),
|
||||
mask, mask);
|
||||
}
|
||||
|
||||
static int lp3972_ldo_disable(struct regulator_dev *dev)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
||||
u16 mask = LP3972_LDO_OUTPUT_ENABLE_MASK(ldo);
|
||||
|
||||
return lp3972_set_bits(lp3972, LP3972_LDO_OUTPUT_ENABLE_REG(ldo),
|
||||
mask, 0);
|
||||
}
|
||||
|
||||
static int lp3972_ldo_get_voltage(struct regulator_dev *dev)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
||||
u16 mask = LP3972_LDO_VOL_MASK(ldo);
|
||||
u16 val, reg;
|
||||
|
||||
reg = lp3972_reg_read(lp3972, LP3972_LDO_VOL_CONTR_REG(ldo));
|
||||
val = (reg >> LP3972_LDO_VOL_CONTR_SHIFT(ldo)) & mask;
|
||||
|
||||
return 1000 * LP3972_LDO_VOL_VALUE_MAP(ldo)[val];
|
||||
}
|
||||
|
||||
static int lp3972_ldo_set_voltage(struct regulator_dev *dev,
|
||||
int min_uV, int max_uV)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int ldo = rdev_get_id(dev) - LP3972_LDO1;
|
||||
int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
|
||||
const int *vol_map = LP3972_LDO_VOL_VALUE_MAP(ldo);
|
||||
u16 val;
|
||||
int shift, ret;
|
||||
|
||||
if (min_vol < vol_map[LP3972_LDO_VOL_MIN_IDX(ldo)] ||
|
||||
min_vol > vol_map[LP3972_LDO_VOL_MAX_IDX(ldo)])
|
||||
return -EINVAL;
|
||||
|
||||
for (val = LP3972_LDO_VOL_MIN_IDX(ldo);
|
||||
val <= LP3972_LDO_VOL_MAX_IDX(ldo); val++)
|
||||
if (vol_map[val] >= min_vol)
|
||||
break;
|
||||
|
||||
if (val > LP3972_LDO_VOL_MAX_IDX(ldo) || vol_map[val] > max_vol)
|
||||
return -EINVAL;
|
||||
|
||||
shift = LP3972_LDO_VOL_CONTR_SHIFT(ldo);
|
||||
ret = lp3972_set_bits(lp3972, LP3972_LDO_VOL_CONTR_REG(ldo),
|
||||
LP3972_LDO_VOL_MASK(ldo) << shift, val << shift);
|
||||
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* LDO1 and LDO5 support voltage control by either target voltage1
|
||||
* or target voltage2 register.
|
||||
* We use target voltage1 register for LDO1 and LDO5 in this driver.
|
||||
* We need to update voltage change control register(0x20) to enable
|
||||
* LDO1 and LDO5 to change to their programmed target values.
|
||||
*/
|
||||
switch (ldo) {
|
||||
case LP3972_LDO1:
|
||||
case LP3972_LDO5:
|
||||
shift = LP3972_LDO_VOL_CHANGE_SHIFT(ldo);
|
||||
ret = lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
|
||||
LP3972_VOL_CHANGE_FLAG_MASK << shift,
|
||||
LP3972_VOL_CHANGE_FLAG_GO << shift);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
|
||||
LP3972_VOL_CHANGE_FLAG_MASK << shift, 0);
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct regulator_ops lp3972_ldo_ops = {
|
||||
.list_voltage = lp3972_ldo_list_voltage,
|
||||
.is_enabled = lp3972_ldo_is_enabled,
|
||||
.enable = lp3972_ldo_enable,
|
||||
.disable = lp3972_ldo_disable,
|
||||
.get_voltage = lp3972_ldo_get_voltage,
|
||||
.set_voltage = lp3972_ldo_set_voltage,
|
||||
};
|
||||
|
||||
static int lp3972_dcdc_list_voltage(struct regulator_dev *dev, unsigned index)
|
||||
{
|
||||
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
||||
return 1000 * buck_voltage_map[buck][index];
|
||||
}
|
||||
|
||||
static int lp3972_dcdc_is_enabled(struct regulator_dev *dev)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
||||
u16 mask = 1 << (buck * 2);
|
||||
u16 val;
|
||||
|
||||
val = lp3972_reg_read(lp3972, LP3972_BUCK_VOL_ENABLE_REG(buck));
|
||||
return !!(val & mask);
|
||||
}
|
||||
|
||||
static int lp3972_dcdc_enable(struct regulator_dev *dev)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
||||
u16 mask = 1 << (buck * 2);
|
||||
u16 val;
|
||||
|
||||
val = lp3972_set_bits(lp3972, LP3972_BUCK_VOL_ENABLE_REG(buck),
|
||||
mask, mask);
|
||||
return val;
|
||||
}
|
||||
|
||||
static int lp3972_dcdc_disable(struct regulator_dev *dev)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
||||
u16 mask = 1 << (buck * 2);
|
||||
u16 val;
|
||||
|
||||
val = lp3972_set_bits(lp3972, LP3972_BUCK_VOL_ENABLE_REG(buck),
|
||||
mask, 0);
|
||||
return val;
|
||||
}
|
||||
|
||||
static int lp3972_dcdc_get_voltage(struct regulator_dev *dev)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
||||
u16 reg;
|
||||
int val;
|
||||
|
||||
reg = lp3972_reg_read(lp3972, LP3972_BUCK_VOL1_REG(buck));
|
||||
reg &= LP3972_BUCK_VOL_MASK;
|
||||
if (reg <= LP3972_BUCK_VOL_MAX_IDX(buck))
|
||||
val = 1000 * buck_voltage_map[buck][reg];
|
||||
else {
|
||||
val = 0;
|
||||
dev_warn(&dev->dev, "chip reported incorrect voltage value."
|
||||
" reg = %d\n", reg);
|
||||
}
|
||||
|
||||
return val;
|
||||
}
|
||||
|
||||
static int lp3972_dcdc_set_voltage(struct regulator_dev *dev,
|
||||
int min_uV, int max_uV)
|
||||
{
|
||||
struct lp3972 *lp3972 = rdev_get_drvdata(dev);
|
||||
int buck = rdev_get_id(dev) - LP3972_DCDC1;
|
||||
int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
|
||||
const int *vol_map = buck_voltage_map[buck];
|
||||
u16 val;
|
||||
int ret;
|
||||
|
||||
if (min_vol < vol_map[LP3972_BUCK_VOL_MIN_IDX(buck)] ||
|
||||
min_vol > vol_map[LP3972_BUCK_VOL_MAX_IDX(buck)])
|
||||
return -EINVAL;
|
||||
|
||||
for (val = LP3972_BUCK_VOL_MIN_IDX(buck);
|
||||
val <= LP3972_BUCK_VOL_MAX_IDX(buck); val++)
|
||||
if (vol_map[val] >= min_vol)
|
||||
break;
|
||||
|
||||
if (val > LP3972_BUCK_VOL_MAX_IDX(buck) ||
|
||||
vol_map[val] > max_vol)
|
||||
return -EINVAL;
|
||||
|
||||
ret = lp3972_set_bits(lp3972, LP3972_BUCK_VOL1_REG(buck),
|
||||
LP3972_BUCK_VOL_MASK, val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (buck != 0)
|
||||
return ret;
|
||||
|
||||
ret = lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
|
||||
LP3972_VOL_CHANGE_FLAG_MASK, LP3972_VOL_CHANGE_FLAG_GO);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
|
||||
LP3972_VOL_CHANGE_FLAG_MASK, 0);
|
||||
}
|
||||
|
||||
static struct regulator_ops lp3972_dcdc_ops = {
|
||||
.list_voltage = lp3972_dcdc_list_voltage,
|
||||
.is_enabled = lp3972_dcdc_is_enabled,
|
||||
.enable = lp3972_dcdc_enable,
|
||||
.disable = lp3972_dcdc_disable,
|
||||
.get_voltage = lp3972_dcdc_get_voltage,
|
||||
.set_voltage = lp3972_dcdc_set_voltage,
|
||||
};
|
||||
|
||||
static struct regulator_desc regulators[] = {
|
||||
{
|
||||
.name = "LDO1",
|
||||
.id = LP3972_LDO1,
|
||||
.ops = &lp3972_ldo_ops,
|
||||
.n_voltages = ARRAY_SIZE(ldo1_voltage_map),
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
{
|
||||
.name = "LDO2",
|
||||
.id = LP3972_LDO2,
|
||||
.ops = &lp3972_ldo_ops,
|
||||
.n_voltages = ARRAY_SIZE(ldo23_voltage_map),
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
{
|
||||
.name = "LDO3",
|
||||
.id = LP3972_LDO3,
|
||||
.ops = &lp3972_ldo_ops,
|
||||
.n_voltages = ARRAY_SIZE(ldo23_voltage_map),
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
{
|
||||
.name = "LDO4",
|
||||
.id = LP3972_LDO4,
|
||||
.ops = &lp3972_ldo_ops,
|
||||
.n_voltages = ARRAY_SIZE(ldo4_voltage_map),
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
{
|
||||
.name = "LDO5",
|
||||
.id = LP3972_LDO5,
|
||||
.ops = &lp3972_ldo_ops,
|
||||
.n_voltages = ARRAY_SIZE(ldo5_voltage_map),
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
{
|
||||
.name = "DCDC1",
|
||||
.id = LP3972_DCDC1,
|
||||
.ops = &lp3972_dcdc_ops,
|
||||
.n_voltages = ARRAY_SIZE(buck1_voltage_map),
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
{
|
||||
.name = "DCDC2",
|
||||
.id = LP3972_DCDC2,
|
||||
.ops = &lp3972_dcdc_ops,
|
||||
.n_voltages = ARRAY_SIZE(buck23_voltage_map),
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
{
|
||||
.name = "DCDC3",
|
||||
.id = LP3972_DCDC3,
|
||||
.ops = &lp3972_dcdc_ops,
|
||||
.n_voltages = ARRAY_SIZE(buck23_voltage_map),
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
static int __devinit setup_regulators(struct lp3972 *lp3972,
|
||||
struct lp3972_platform_data *pdata)
|
||||
{
|
||||
int i, err;
|
||||
|
||||
lp3972->num_regulators = pdata->num_regulators;
|
||||
lp3972->rdev = kcalloc(pdata->num_regulators,
|
||||
sizeof(struct regulator_dev *), GFP_KERNEL);
|
||||
if (!lp3972->rdev) {
|
||||
err = -ENOMEM;
|
||||
goto err_nomem;
|
||||
}
|
||||
|
||||
/* Instantiate the regulators */
|
||||
for (i = 0; i < pdata->num_regulators; i++) {
|
||||
struct lp3972_regulator_subdev *reg = &pdata->regulators[i];
|
||||
lp3972->rdev[i] = regulator_register(®ulators[reg->id],
|
||||
lp3972->dev, reg->initdata, lp3972);
|
||||
|
||||
if (IS_ERR(lp3972->rdev[i])) {
|
||||
err = PTR_ERR(lp3972->rdev[i]);
|
||||
dev_err(lp3972->dev, "regulator init failed: %d\n",
|
||||
err);
|
||||
goto error;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
error:
|
||||
while (--i >= 0)
|
||||
regulator_unregister(lp3972->rdev[i]);
|
||||
kfree(lp3972->rdev);
|
||||
lp3972->rdev = NULL;
|
||||
err_nomem:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __devinit lp3972_i2c_probe(struct i2c_client *i2c,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct lp3972 *lp3972;
|
||||
struct lp3972_platform_data *pdata = i2c->dev.platform_data;
|
||||
int ret;
|
||||
u16 val;
|
||||
|
||||
if (!pdata) {
|
||||
dev_dbg(&i2c->dev, "No platform init data supplied\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
lp3972 = kzalloc(sizeof(struct lp3972), GFP_KERNEL);
|
||||
if (!lp3972)
|
||||
return -ENOMEM;
|
||||
|
||||
lp3972->i2c = i2c;
|
||||
lp3972->dev = &i2c->dev;
|
||||
|
||||
mutex_init(&lp3972->io_lock);
|
||||
|
||||
/* Detect LP3972 */
|
||||
ret = lp3972_i2c_read(i2c, LP3972_SYS_CONTROL1_REG, 1, &val);
|
||||
if (ret == 0 &&
|
||||
(val & SYS_CONTROL1_INIT_MASK) != SYS_CONTROL1_INIT_VAL) {
|
||||
ret = -ENODEV;
|
||||
dev_err(&i2c->dev, "chip reported: val = 0x%x\n", val);
|
||||
}
|
||||
if (ret < 0) {
|
||||
dev_err(&i2c->dev, "failed to detect device. ret = %d\n", ret);
|
||||
goto err_detect;
|
||||
}
|
||||
|
||||
ret = setup_regulators(lp3972, pdata);
|
||||
if (ret < 0)
|
||||
goto err_detect;
|
||||
|
||||
i2c_set_clientdata(i2c, lp3972);
|
||||
return 0;
|
||||
|
||||
err_detect:
|
||||
kfree(lp3972);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit lp3972_i2c_remove(struct i2c_client *i2c)
|
||||
{
|
||||
struct lp3972 *lp3972 = i2c_get_clientdata(i2c);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < lp3972->num_regulators; i++)
|
||||
regulator_unregister(lp3972->rdev[i]);
|
||||
kfree(lp3972->rdev);
|
||||
kfree(lp3972);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id lp3972_i2c_id[] = {
|
||||
{ "lp3972", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, lp3972_i2c_id);
|
||||
|
||||
static struct i2c_driver lp3972_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "lp3972",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = lp3972_i2c_probe,
|
||||
.remove = __devexit_p(lp3972_i2c_remove),
|
||||
.id_table = lp3972_i2c_id,
|
||||
};
|
||||
|
||||
static int __init lp3972_module_init(void)
|
||||
{
|
||||
return i2c_add_driver(&lp3972_i2c_driver);
|
||||
}
|
||||
subsys_initcall(lp3972_module_init);
|
||||
|
||||
static void __exit lp3972_module_exit(void)
|
||||
{
|
||||
i2c_del_driver(&lp3972_i2c_driver);
|
||||
}
|
||||
module_exit(lp3972_module_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Axel Lin <axel.lin@gmail.com>");
|
||||
MODULE_DESCRIPTION("LP3972 PMIC driver");
|
||||
366
drivers/regulator/max8952.c
Normal file
366
drivers/regulator/max8952.c
Normal file
@ -0,0 +1,366 @@
|
||||
/*
|
||||
* max8952.c - Voltage and current regulation for the Maxim 8952
|
||||
*
|
||||
* Copyright (C) 2010 Samsung Electronics
|
||||
* MyungJoo Ham <myungjoo.ham@samsung.com>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/regulator/driver.h>
|
||||
#include <linux/regulator/max8952.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/gpio.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
/* Registers */
|
||||
enum {
|
||||
MAX8952_REG_MODE0,
|
||||
MAX8952_REG_MODE1,
|
||||
MAX8952_REG_MODE2,
|
||||
MAX8952_REG_MODE3,
|
||||
MAX8952_REG_CONTROL,
|
||||
MAX8952_REG_SYNC,
|
||||
MAX8952_REG_RAMP,
|
||||
MAX8952_REG_CHIP_ID1,
|
||||
MAX8952_REG_CHIP_ID2,
|
||||
};
|
||||
|
||||
struct max8952_data {
|
||||
struct i2c_client *client;
|
||||
struct device *dev;
|
||||
struct mutex mutex;
|
||||
struct max8952_platform_data *pdata;
|
||||
struct regulator_dev *rdev;
|
||||
|
||||
bool vid0;
|
||||
bool vid1;
|
||||
bool en;
|
||||
};
|
||||
|
||||
static int max8952_read_reg(struct max8952_data *max8952, u8 reg)
|
||||
{
|
||||
int ret = i2c_smbus_read_byte_data(max8952->client, reg);
|
||||
if (ret > 0)
|
||||
ret &= 0xff;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int max8952_write_reg(struct max8952_data *max8952,
|
||||
u8 reg, u8 value)
|
||||
{
|
||||
return i2c_smbus_write_byte_data(max8952->client, reg, value);
|
||||
}
|
||||
|
||||
static int max8952_voltage(struct max8952_data *max8952, u8 mode)
|
||||
{
|
||||
return (max8952->pdata->dvs_mode[mode] * 10 + 770) * 1000;
|
||||
}
|
||||
|
||||
static int max8952_list_voltage(struct regulator_dev *rdev,
|
||||
unsigned int selector)
|
||||
{
|
||||
struct max8952_data *max8952 = rdev_get_drvdata(rdev);
|
||||
|
||||
if (rdev_get_id(rdev) != 0)
|
||||
return -EINVAL;
|
||||
|
||||
return max8952_voltage(max8952, selector);
|
||||
}
|
||||
|
||||
static int max8952_is_enabled(struct regulator_dev *rdev)
|
||||
{
|
||||
struct max8952_data *max8952 = rdev_get_drvdata(rdev);
|
||||
return max8952->en;
|
||||
}
|
||||
|
||||
static int max8952_enable(struct regulator_dev *rdev)
|
||||
{
|
||||
struct max8952_data *max8952 = rdev_get_drvdata(rdev);
|
||||
|
||||
/* If not valid, assume "ALWAYS_HIGH" */
|
||||
if (gpio_is_valid(max8952->pdata->gpio_en))
|
||||
gpio_set_value(max8952->pdata->gpio_en, 1);
|
||||
|
||||
max8952->en = true;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int max8952_disable(struct regulator_dev *rdev)
|
||||
{
|
||||
struct max8952_data *max8952 = rdev_get_drvdata(rdev);
|
||||
|
||||
/* If not valid, assume "ALWAYS_HIGH" -> not permitted */
|
||||
if (gpio_is_valid(max8952->pdata->gpio_en))
|
||||
gpio_set_value(max8952->pdata->gpio_en, 0);
|
||||
else
|
||||
return -EPERM;
|
||||
|
||||
max8952->en = false;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int max8952_get_voltage(struct regulator_dev *rdev)
|
||||
{
|
||||
struct max8952_data *max8952 = rdev_get_drvdata(rdev);
|
||||
u8 vid = 0;
|
||||
|
||||
if (max8952->vid0)
|
||||
vid += 1;
|
||||
if (max8952->vid1)
|
||||
vid += 2;
|
||||
|
||||
return max8952_voltage(max8952, vid);
|
||||
}
|
||||
|
||||
static int max8952_set_voltage(struct regulator_dev *rdev,
|
||||
int min_uV, int max_uV)
|
||||
{
|
||||
struct max8952_data *max8952 = rdev_get_drvdata(rdev);
|
||||
s8 vid = -1, i;
|
||||
|
||||
if (!gpio_is_valid(max8952->pdata->gpio_vid0) ||
|
||||
!gpio_is_valid(max8952->pdata->gpio_vid0)) {
|
||||
/* DVS not supported */
|
||||
return -EPERM;
|
||||
}
|
||||
|
||||
for (i = 0; i < MAX8952_NUM_DVS_MODE; i++) {
|
||||
int volt = max8952_voltage(max8952, i);
|
||||
|
||||
/* Set the voltage as low as possible within the range */
|
||||
if (volt <= max_uV && volt >= min_uV)
|
||||
if (vid == -1 || max8952_voltage(max8952, vid) > volt)
|
||||
vid = i;
|
||||
}
|
||||
|
||||
if (vid >= 0 && vid < MAX8952_NUM_DVS_MODE) {
|
||||
max8952->vid0 = (vid % 2 == 1);
|
||||
max8952->vid1 = (((vid >> 1) % 2) == 1);
|
||||
gpio_set_value(max8952->pdata->gpio_vid0, max8952->vid0);
|
||||
gpio_set_value(max8952->pdata->gpio_vid1, max8952->vid1);
|
||||
} else
|
||||
return -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct regulator_ops max8952_ops = {
|
||||
.list_voltage = max8952_list_voltage,
|
||||
.is_enabled = max8952_is_enabled,
|
||||
.enable = max8952_enable,
|
||||
.disable = max8952_disable,
|
||||
.get_voltage = max8952_get_voltage,
|
||||
.set_voltage = max8952_set_voltage,
|
||||
.set_suspend_disable = max8952_disable,
|
||||
};
|
||||
|
||||
static struct regulator_desc regulator = {
|
||||
.name = "MAX8952_VOUT",
|
||||
.id = 0,
|
||||
.n_voltages = MAX8952_NUM_DVS_MODE,
|
||||
.ops = &max8952_ops,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
static int __devinit max8952_pmic_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *i2c_id)
|
||||
{
|
||||
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
|
||||
struct max8952_platform_data *pdata = client->dev.platform_data;
|
||||
struct max8952_data *max8952;
|
||||
|
||||
int ret = 0, err = 0;
|
||||
|
||||
if (!pdata) {
|
||||
dev_err(&client->dev, "Require the platform data\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
|
||||
return -EIO;
|
||||
|
||||
max8952 = kzalloc(sizeof(struct max8952_data), GFP_KERNEL);
|
||||
if (!max8952)
|
||||
return -ENOMEM;
|
||||
|
||||
max8952->client = client;
|
||||
max8952->dev = &client->dev;
|
||||
max8952->pdata = pdata;
|
||||
mutex_init(&max8952->mutex);
|
||||
|
||||
max8952->rdev = regulator_register(®ulator, max8952->dev,
|
||||
&pdata->reg_data, max8952);
|
||||
|
||||
if (IS_ERR(max8952->rdev)) {
|
||||
ret = PTR_ERR(max8952->rdev);
|
||||
dev_err(max8952->dev, "regulator init failed (%d)\n", ret);
|
||||
goto err_reg;
|
||||
}
|
||||
|
||||
max8952->en = !!(pdata->reg_data.constraints.boot_on);
|
||||
max8952->vid0 = (pdata->default_mode % 2) == 1;
|
||||
max8952->vid1 = ((pdata->default_mode >> 1) % 2) == 1;
|
||||
|
||||
if (gpio_is_valid(pdata->gpio_en)) {
|
||||
if (!gpio_request(pdata->gpio_en, "MAX8952 EN"))
|
||||
gpio_direction_output(pdata->gpio_en, max8952->en);
|
||||
else
|
||||
err = 1;
|
||||
} else
|
||||
err = 2;
|
||||
|
||||
if (err) {
|
||||
dev_info(max8952->dev, "EN gpio invalid: assume that EN"
|
||||
"is always High\n");
|
||||
max8952->en = 1;
|
||||
pdata->gpio_en = -1; /* Mark invalid */
|
||||
}
|
||||
|
||||
err = 0;
|
||||
|
||||
if (gpio_is_valid(pdata->gpio_vid0) &&
|
||||
gpio_is_valid(pdata->gpio_vid1)) {
|
||||
if (!gpio_request(pdata->gpio_vid0, "MAX8952 VID0"))
|
||||
gpio_direction_output(pdata->gpio_vid0,
|
||||
(pdata->default_mode) % 2);
|
||||
else
|
||||
err = 1;
|
||||
|
||||
if (!gpio_request(pdata->gpio_vid1, "MAX8952 VID1"))
|
||||
gpio_direction_output(pdata->gpio_vid1,
|
||||
(pdata->default_mode >> 1) % 2);
|
||||
else {
|
||||
if (!err)
|
||||
gpio_free(pdata->gpio_vid0);
|
||||
err = 2;
|
||||
}
|
||||
|
||||
} else
|
||||
err = 3;
|
||||
|
||||
if (err) {
|
||||
dev_warn(max8952->dev, "VID0/1 gpio invalid: "
|
||||
"DVS not avilable.\n");
|
||||
max8952->vid0 = 0;
|
||||
max8952->vid1 = 0;
|
||||
/* Mark invalid */
|
||||
pdata->gpio_vid0 = -1;
|
||||
pdata->gpio_vid1 = -1;
|
||||
|
||||
/* Disable Pulldown of EN only */
|
||||
max8952_write_reg(max8952, MAX8952_REG_CONTROL, 0x60);
|
||||
|
||||
dev_err(max8952->dev, "DVS modes disabled because VID0 and VID1"
|
||||
" do not have proper controls.\n");
|
||||
} else {
|
||||
/*
|
||||
* Disable Pulldown on EN, VID0, VID1 to reduce
|
||||
* leakage current of MAX8952 assuming that MAX8952
|
||||
* is turned on (EN==1). Note that without having VID0/1
|
||||
* properly connected, turning pulldown off can be
|
||||
* problematic. Thus, turn this off only when they are
|
||||
* controllable by GPIO.
|
||||
*/
|
||||
max8952_write_reg(max8952, MAX8952_REG_CONTROL, 0x0);
|
||||
}
|
||||
|
||||
max8952_write_reg(max8952, MAX8952_REG_MODE0,
|
||||
(max8952_read_reg(max8952,
|
||||
MAX8952_REG_MODE0) & 0xC0) |
|
||||
(pdata->dvs_mode[0] & 0x3F));
|
||||
max8952_write_reg(max8952, MAX8952_REG_MODE1,
|
||||
(max8952_read_reg(max8952,
|
||||
MAX8952_REG_MODE1) & 0xC0) |
|
||||
(pdata->dvs_mode[1] & 0x3F));
|
||||
max8952_write_reg(max8952, MAX8952_REG_MODE2,
|
||||
(max8952_read_reg(max8952,
|
||||
MAX8952_REG_MODE2) & 0xC0) |
|
||||
(pdata->dvs_mode[2] & 0x3F));
|
||||
max8952_write_reg(max8952, MAX8952_REG_MODE3,
|
||||
(max8952_read_reg(max8952,
|
||||
MAX8952_REG_MODE3) & 0xC0) |
|
||||
(pdata->dvs_mode[3] & 0x3F));
|
||||
|
||||
max8952_write_reg(max8952, MAX8952_REG_SYNC,
|
||||
(max8952_read_reg(max8952, MAX8952_REG_SYNC) & 0x3F) |
|
||||
((pdata->sync_freq & 0x3) << 6));
|
||||
max8952_write_reg(max8952, MAX8952_REG_RAMP,
|
||||
(max8952_read_reg(max8952, MAX8952_REG_RAMP) & 0x1F) |
|
||||
((pdata->ramp_speed & 0x7) << 5));
|
||||
|
||||
i2c_set_clientdata(client, max8952);
|
||||
|
||||
return 0;
|
||||
|
||||
err_reg:
|
||||
kfree(max8952);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit max8952_pmic_remove(struct i2c_client *client)
|
||||
{
|
||||
struct max8952_data *max8952 = i2c_get_clientdata(client);
|
||||
struct max8952_platform_data *pdata = max8952->pdata;
|
||||
struct regulator_dev *rdev = max8952->rdev;
|
||||
|
||||
regulator_unregister(rdev);
|
||||
|
||||
gpio_free(pdata->gpio_vid0);
|
||||
gpio_free(pdata->gpio_vid1);
|
||||
gpio_free(pdata->gpio_en);
|
||||
|
||||
kfree(max8952);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id max8952_ids[] = {
|
||||
{ "max8952", 0 },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, max8952_ids);
|
||||
|
||||
static struct i2c_driver max8952_pmic_driver = {
|
||||
.probe = max8952_pmic_probe,
|
||||
.remove = __devexit_p(max8952_pmic_remove),
|
||||
.driver = {
|
||||
.name = "max8952",
|
||||
},
|
||||
.id_table = max8952_ids,
|
||||
};
|
||||
|
||||
static int __init max8952_pmic_init(void)
|
||||
{
|
||||
return i2c_add_driver(&max8952_pmic_driver);
|
||||
}
|
||||
subsys_initcall(max8952_pmic_init);
|
||||
|
||||
static void __exit max8952_pmic_exit(void)
|
||||
{
|
||||
i2c_del_driver(&max8952_pmic_driver);
|
||||
}
|
||||
module_exit(max8952_pmic_exit);
|
||||
|
||||
MODULE_DESCRIPTION("MAXIM 8952 voltage regulator driver");
|
||||
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
48
include/linux/regulator/lp3972.h
Normal file
48
include/linux/regulator/lp3972.h
Normal file
@ -0,0 +1,48 @@
|
||||
/*
|
||||
* National Semiconductors LP3972 PMIC chip client interface
|
||||
*
|
||||
* Based on lp3971.h
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#ifndef __LINUX_REGULATOR_LP3972_H
|
||||
#define __LINUX_REGULATOR_LP3972_H
|
||||
|
||||
#include <linux/regulator/machine.h>
|
||||
|
||||
#define LP3972_LDO1 0
|
||||
#define LP3972_LDO2 1
|
||||
#define LP3972_LDO3 2
|
||||
#define LP3972_LDO4 3
|
||||
#define LP3972_LDO5 4
|
||||
|
||||
#define LP3972_DCDC1 5
|
||||
#define LP3972_DCDC2 6
|
||||
#define LP3972_DCDC3 7
|
||||
|
||||
#define LP3972_NUM_REGULATORS 8
|
||||
|
||||
struct lp3972_regulator_subdev {
|
||||
int id;
|
||||
struct regulator_init_data *initdata;
|
||||
};
|
||||
|
||||
struct lp3972_platform_data {
|
||||
int num_regulators;
|
||||
struct lp3972_regulator_subdev *regulators;
|
||||
};
|
||||
|
||||
#endif
|
||||
@ -189,10 +189,15 @@ int regulator_suspend_prepare(suspend_state_t state);
|
||||
|
||||
#ifdef CONFIG_REGULATOR
|
||||
void regulator_has_full_constraints(void);
|
||||
void regulator_use_dummy_regulator(void);
|
||||
#else
|
||||
static inline void regulator_has_full_constraints(void)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void regulator_use_dummy_regulator(void)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
135
include/linux/regulator/max8952.h
Normal file
135
include/linux/regulator/max8952.h
Normal file
@ -0,0 +1,135 @@
|
||||
/*
|
||||
* max8952.h - Voltage regulation for the Maxim 8952
|
||||
*
|
||||
* Copyright (C) 2010 Samsung Electrnoics
|
||||
* MyungJoo Ham <myungjoo.ham@samsung.com>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
#ifndef REGULATOR_MAX8952
|
||||
#define REGULATOR_MAX8952
|
||||
|
||||
#include <linux/regulator/machine.h>
|
||||
|
||||
enum {
|
||||
MAX8952_DVS_MODE0,
|
||||
MAX8952_DVS_MODE1,
|
||||
MAX8952_DVS_MODE2,
|
||||
MAX8952_DVS_MODE3,
|
||||
};
|
||||
|
||||
enum {
|
||||
MAX8952_DVS_770mV = 0,
|
||||
MAX8952_DVS_780mV,
|
||||
MAX8952_DVS_790mV,
|
||||
MAX8952_DVS_800mV,
|
||||
MAX8952_DVS_810mV,
|
||||
MAX8952_DVS_820mV,
|
||||
MAX8952_DVS_830mV,
|
||||
MAX8952_DVS_840mV,
|
||||
MAX8952_DVS_850mV,
|
||||
MAX8952_DVS_860mV,
|
||||
MAX8952_DVS_870mV,
|
||||
MAX8952_DVS_880mV,
|
||||
MAX8952_DVS_890mV,
|
||||
MAX8952_DVS_900mV,
|
||||
MAX8952_DVS_910mV,
|
||||
MAX8952_DVS_920mV,
|
||||
MAX8952_DVS_930mV,
|
||||
MAX8952_DVS_940mV,
|
||||
MAX8952_DVS_950mV,
|
||||
MAX8952_DVS_960mV,
|
||||
MAX8952_DVS_970mV,
|
||||
MAX8952_DVS_980mV,
|
||||
MAX8952_DVS_990mV,
|
||||
MAX8952_DVS_1000mV,
|
||||
MAX8952_DVS_1010mV,
|
||||
MAX8952_DVS_1020mV,
|
||||
MAX8952_DVS_1030mV,
|
||||
MAX8952_DVS_1040mV,
|
||||
MAX8952_DVS_1050mV,
|
||||
MAX8952_DVS_1060mV,
|
||||
MAX8952_DVS_1070mV,
|
||||
MAX8952_DVS_1080mV,
|
||||
MAX8952_DVS_1090mV,
|
||||
MAX8952_DVS_1100mV,
|
||||
MAX8952_DVS_1110mV,
|
||||
MAX8952_DVS_1120mV,
|
||||
MAX8952_DVS_1130mV,
|
||||
MAX8952_DVS_1140mV,
|
||||
MAX8952_DVS_1150mV,
|
||||
MAX8952_DVS_1160mV,
|
||||
MAX8952_DVS_1170mV,
|
||||
MAX8952_DVS_1180mV,
|
||||
MAX8952_DVS_1190mV,
|
||||
MAX8952_DVS_1200mV,
|
||||
MAX8952_DVS_1210mV,
|
||||
MAX8952_DVS_1220mV,
|
||||
MAX8952_DVS_1230mV,
|
||||
MAX8952_DVS_1240mV,
|
||||
MAX8952_DVS_1250mV,
|
||||
MAX8952_DVS_1260mV,
|
||||
MAX8952_DVS_1270mV,
|
||||
MAX8952_DVS_1280mV,
|
||||
MAX8952_DVS_1290mV,
|
||||
MAX8952_DVS_1300mV,
|
||||
MAX8952_DVS_1310mV,
|
||||
MAX8952_DVS_1320mV,
|
||||
MAX8952_DVS_1330mV,
|
||||
MAX8952_DVS_1340mV,
|
||||
MAX8952_DVS_1350mV,
|
||||
MAX8952_DVS_1360mV,
|
||||
MAX8952_DVS_1370mV,
|
||||
MAX8952_DVS_1380mV,
|
||||
MAX8952_DVS_1390mV,
|
||||
MAX8952_DVS_1400mV,
|
||||
};
|
||||
|
||||
enum {
|
||||
MAX8952_SYNC_FREQ_26MHZ, /* Default */
|
||||
MAX8952_SYNC_FREQ_13MHZ,
|
||||
MAX8952_SYNC_FREQ_19_2MHZ,
|
||||
};
|
||||
|
||||
enum {
|
||||
MAX8952_RAMP_32mV_us = 0, /* Default */
|
||||
MAX8952_RAMP_16mV_us,
|
||||
MAX8952_RAMP_8mV_us,
|
||||
MAX8952_RAMP_4mV_us,
|
||||
MAX8952_RAMP_2mV_us,
|
||||
MAX8952_RAMP_1mV_us,
|
||||
MAX8952_RAMP_0_5mV_us,
|
||||
MAX8952_RAMP_0_25mV_us,
|
||||
};
|
||||
|
||||
#define MAX8952_NUM_DVS_MODE 4
|
||||
|
||||
struct max8952_platform_data {
|
||||
int gpio_vid0;
|
||||
int gpio_vid1;
|
||||
int gpio_en;
|
||||
|
||||
u8 default_mode;
|
||||
u8 dvs_mode[MAX8952_NUM_DVS_MODE]; /* MAX8952_DVS_MODEx_XXXXmV */
|
||||
|
||||
u8 sync_freq;
|
||||
u8 ramp_speed;
|
||||
|
||||
struct regulator_init_data reg_data;
|
||||
};
|
||||
|
||||
|
||||
#endif /* REGULATOR_MAX8952 */
|
||||
Loading…
Reference in New Issue
Block a user