regulator: add MAX8907 driver
The MAX8907 is an I2C-based power-management IC containing voltage regulators, a reset controller, a real-time clock, and a touch-screen controller. The original driver was written by: * Gyungoh Yoo <jack.yoo@maxim-ic.com> Various fixes and enhancements by: * Jin Park <jinyoungp@nvidia.com> * Tom Cherry <tcherry@nvidia.com> * Prashant Gaikwad <pgaikwad@nvidia.com> * Dan Willemsen <dwillemsen@nvidia.com> * Laxman Dewangan <ldewangan@nvidia.com> During upstreaming, I (swarren): * Converted to regmap. * Allowed probing from device tree. * Reworked the regulator driver to be represented as a single device that provides multiple regulators, rather than as a device per regulator. * Replaced many regulator ops with standard functions. * Added ability to specify supplies for each regulator. * Removed the WLED regulator. If/when we expose this in the driver, it should be a backlight object not a regulator object. * Renamed from max8907c->max8907, since the driver covers at least the C and B revisions. * General cleanup. Signed-off-by: Gyungoh Yoo <jack.yoo@maxim-ic.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Gyungoh Yoo
Mark Brown
parent
0ffff5a60f
commit
ffee19091a
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@ -172,6 +172,14 @@ config REGULATOR_MAX8660
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This driver controls a Maxim 8660/8661 voltage output
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regulator via I2C bus.
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config REGULATOR_MAX8907
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tristate "Maxim 8907 voltage regulator"
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depends on MFD_MAX8907
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help
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This driver controls a Maxim 8907 voltage output regulator
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via I2C bus. The provided regulator is suitable for Tegra
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chip to control Step-Down DC-DC and LDOs.
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config REGULATOR_MAX8925
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tristate "Maxim MAX8925 Power Management IC"
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depends on MFD_MAX8925
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@ -30,6 +30,7 @@ obj-$(CONFIG_REGULATOR_LP8788) += lp8788-ldo.o
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obj-$(CONFIG_REGULATOR_MAX1586) += max1586.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-$(CONFIG_REGULATOR_MAX8907) += max8907-regulator.o
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obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o
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obj-$(CONFIG_REGULATOR_MAX8952) += max8952.o
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obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o
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@ -0,0 +1,383 @@
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/*
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* max8907-regulator.c -- support regulators in max8907
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*
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* Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
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* Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
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*
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* Portions based on drivers/regulator/tps65910-regulator.c,
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* Copyright 2010 Texas Instruments Inc.
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* Author: Graeme Gregory <gg@slimlogic.co.uk>
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* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
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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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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/max8907.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#define MAX8907_II2RR_VERSION_MASK 0xF0
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#define MAX8907_II2RR_VERSION_REV_A 0x00
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#define MAX8907_II2RR_VERSION_REV_B 0x10
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#define MAX8907_II2RR_VERSION_REV_C 0x30
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struct max8907_regulator {
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struct regulator_desc desc[MAX8907_NUM_REGULATORS];
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struct regulator_dev *rdev[MAX8907_NUM_REGULATORS];
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};
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#define REG_MBATT() \
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[MAX8907_MBATT] = { \
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.name = "MBATT", \
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.supply_name = "mbatt", \
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.id = MAX8907_MBATT, \
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.ops = &max8907_mbatt_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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}
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#define REG_LDO(ids, supply, base, min, max, step) \
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[MAX8907_##ids] = { \
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.name = #ids, \
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.supply_name = supply, \
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.id = MAX8907_##ids, \
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.n_voltages = ((max) - (min)) / (step) + 1, \
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.ops = &max8907_ldo_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = (min), \
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.uV_step = (step), \
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.vsel_reg = (base) + MAX8907_VOUT, \
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.vsel_mask = 0x3f, \
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.enable_reg = (base) + MAX8907_CTL, \
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.enable_mask = MAX8907_MASK_LDO_EN, \
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}
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#define REG_FIXED(ids, supply, voltage) \
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[MAX8907_##ids] = { \
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.name = #ids, \
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.supply_name = supply, \
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.id = MAX8907_##ids, \
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.n_voltages = 1, \
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.ops = &max8907_fixed_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = (voltage), \
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}
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#define REG_OUT5V(ids, supply, base, voltage) \
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[MAX8907_##ids] = { \
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.name = #ids, \
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.supply_name = supply, \
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.id = MAX8907_##ids, \
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.n_voltages = 1, \
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.ops = &max8907_out5v_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = (voltage), \
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.enable_reg = (base), \
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.enable_mask = MAX8907_MASK_OUT5V_EN, \
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}
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#define REG_BBAT(ids, supply, base, min, max, step) \
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[MAX8907_##ids] = { \
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.name = #ids, \
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.supply_name = supply, \
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.id = MAX8907_##ids, \
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.n_voltages = ((max) - (min)) / (step) + 1, \
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.ops = &max8907_bbat_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = (min), \
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.uV_step = (step), \
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.vsel_reg = (base), \
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.vsel_mask = MAX8907_MASK_VBBATTCV, \
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}
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#define LDO_750_50(id, supply, base) REG_LDO(id, supply, (base), \
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750000, 3900000, 50000)
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#define LDO_650_25(id, supply, base) REG_LDO(id, supply, (base), \
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650000, 2225000, 25000)
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static struct regulator_ops max8907_mbatt_ops = {
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};
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static struct regulator_ops max8907_ldo_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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static struct regulator_ops max8907_ldo_hwctl_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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};
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static struct regulator_ops max8907_fixed_ops = {
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.list_voltage = regulator_list_voltage_linear,
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};
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static struct regulator_ops max8907_out5v_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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static struct regulator_ops max8907_out5v_hwctl_ops = {
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.list_voltage = regulator_list_voltage_linear,
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};
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static struct regulator_ops max8907_bbat_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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};
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static struct regulator_desc max8907_regulators[] = {
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REG_MBATT(),
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REG_LDO(SD1, "in-v1", MAX8907_REG_SDCTL1, 650000, 2225000, 25000),
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REG_LDO(SD2, "in-v2", MAX8907_REG_SDCTL2, 637500, 1425000, 12500),
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REG_LDO(SD3, "in-v3", MAX8907_REG_SDCTL3, 750000, 3900000, 50000),
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LDO_750_50(LDO1, "in1", MAX8907_REG_LDOCTL1),
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LDO_650_25(LDO2, "in2", MAX8907_REG_LDOCTL2),
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LDO_650_25(LDO3, "in3", MAX8907_REG_LDOCTL3),
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LDO_750_50(LDO4, "in4", MAX8907_REG_LDOCTL4),
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LDO_750_50(LDO5, "in5", MAX8907_REG_LDOCTL5),
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LDO_750_50(LDO6, "in6", MAX8907_REG_LDOCTL6),
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LDO_750_50(LDO7, "in7", MAX8907_REG_LDOCTL7),
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LDO_750_50(LDO8, "in8", MAX8907_REG_LDOCTL8),
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LDO_750_50(LDO9, "in9", MAX8907_REG_LDOCTL9),
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LDO_750_50(LDO10, "in10", MAX8907_REG_LDOCTL10),
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LDO_750_50(LDO11, "in11", MAX8907_REG_LDOCTL11),
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LDO_750_50(LDO12, "in12", MAX8907_REG_LDOCTL12),
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LDO_750_50(LDO13, "in13", MAX8907_REG_LDOCTL13),
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LDO_750_50(LDO14, "in14", MAX8907_REG_LDOCTL14),
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LDO_750_50(LDO15, "in15", MAX8907_REG_LDOCTL15),
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LDO_750_50(LDO16, "in16", MAX8907_REG_LDOCTL16),
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LDO_650_25(LDO17, "in17", MAX8907_REG_LDOCTL17),
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LDO_650_25(LDO18, "in18", MAX8907_REG_LDOCTL18),
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LDO_750_50(LDO19, "in19", MAX8907_REG_LDOCTL19),
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LDO_750_50(LDO20, "in20", MAX8907_REG_LDOCTL20),
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REG_OUT5V(OUT5V, "mbatt", MAX8907_REG_OUT5VEN, 5000000),
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REG_OUT5V(OUT33V, "mbatt", MAX8907_REG_OUT33VEN, 3300000),
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REG_BBAT(BBAT, "MBATT", MAX8907_REG_BBAT_CNFG,
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2400000, 3000000, 200000),
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REG_FIXED(SDBY, "MBATT", 1200000),
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REG_FIXED(VRTC, "MBATT", 3300000),
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};
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#ifdef CONFIG_OF
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#define MATCH(_name, _id) \
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[MAX8907_##_id] = { \
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.name = #_name, \
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.driver_data = (void *)&max8907_regulators[MAX8907_##_id], \
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}
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static struct of_regulator_match max8907_matches[] = {
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MATCH(mbatt, MBATT),
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MATCH(sd1, SD1),
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MATCH(sd2, SD2),
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MATCH(sd3, SD3),
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MATCH(ldo1, LDO1),
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MATCH(ldo2, LDO2),
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MATCH(ldo3, LDO3),
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MATCH(ldo4, LDO4),
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MATCH(ldo5, LDO5),
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MATCH(ldo6, LDO6),
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MATCH(ldo7, LDO7),
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MATCH(ldo8, LDO8),
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MATCH(ldo9, LDO9),
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MATCH(ldo10, LDO10),
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MATCH(ldo11, LDO11),
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MATCH(ldo12, LDO12),
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MATCH(ldo13, LDO13),
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MATCH(ldo14, LDO14),
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MATCH(ldo15, LDO15),
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MATCH(ldo16, LDO16),
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MATCH(ldo17, LDO17),
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MATCH(ldo18, LDO18),
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MATCH(ldo19, LDO19),
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MATCH(ldo20, LDO20),
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MATCH(out5v, OUT5V),
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MATCH(out33v, OUT33V),
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MATCH(bbat, BBAT),
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MATCH(sdby, SDBY),
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MATCH(vrtc, VRTC),
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};
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static int max8907_regulator_parse_dt(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.parent->of_node;
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struct device_node *regulators;
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int ret;
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if (!pdev->dev.parent->of_node)
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return 0;
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regulators = of_find_node_by_name(np, "regulators");
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if (!regulators) {
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dev_err(&pdev->dev, "regulators node not found\n");
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return -EINVAL;
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}
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ret = of_regulator_match(pdev->dev.parent, regulators,
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max8907_matches,
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ARRAY_SIZE(max8907_matches));
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if (ret < 0) {
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dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
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ret);
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return ret;
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}
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return 0;
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}
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#else
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static int max8907_regulator_parse_dt(struct platform_device *pdev)
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{
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return 0;
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}
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#endif
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static __devinit int max8907_regulator_probe(struct platform_device *pdev)
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{
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struct max8907 *max8907 = dev_get_drvdata(pdev->dev.parent);
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struct max8907_platform_data *pdata = dev_get_platdata(max8907->dev);
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int ret;
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struct max8907_regulator *pmic;
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unsigned int val;
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int i;
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struct regulator_config config = {};
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struct regulator_init_data *idata;
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const char *mbatt_rail_name = NULL;
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ret = max8907_regulator_parse_dt(pdev);
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if (ret)
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return ret;
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pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
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if (!pmic) {
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dev_err(&pdev->dev, "Failed to alloc pmic\n");
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return -ENOMEM;
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}
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platform_set_drvdata(pdev, pmic);
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memcpy(pmic->desc, max8907_regulators, sizeof(pmic->desc));
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/* Backwards compatibility with MAX8907B; SD1 uses different voltages */
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regmap_read(max8907->regmap_gen, MAX8907_REG_II2RR, &val);
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if ((val & MAX8907_II2RR_VERSION_MASK) ==
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MAX8907_II2RR_VERSION_REV_B) {
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pmic->desc[MAX8907_SD1].min_uV = 637500;
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pmic->desc[MAX8907_SD1].uV_step = 12500;
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pmic->desc[MAX8907_SD1].n_voltages = (1425000 - 637500) / 12500;
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}
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for (i = 0; i < MAX8907_NUM_REGULATORS; i++) {
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config.dev = pdev->dev.parent;
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if (pdata)
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idata = pdata->init_data[i];
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else
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idata = max8907_matches[i].init_data;
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config.init_data = idata;
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config.driver_data = pmic;
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config.regmap = max8907->regmap_gen;
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config.of_node = max8907_matches[i].of_node;
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switch (pmic->desc[i].id) {
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case MAX8907_MBATT:
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mbatt_rail_name = idata->constraints.name;
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break;
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case MAX8907_BBAT:
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case MAX8907_SDBY:
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case MAX8907_VRTC:
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idata->supply_regulator = mbatt_rail_name;
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break;
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}
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if (pmic->desc[i].ops == &max8907_ldo_ops) {
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regmap_read(config.regmap, pmic->desc[i].enable_reg,
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&val);
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if ((val & MAX8907_MASK_LDO_SEQ) !=
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MAX8907_MASK_LDO_SEQ)
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pmic->desc[i].ops = &max8907_ldo_hwctl_ops;
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} else if (pmic->desc[i].ops == &max8907_out5v_ops) {
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regmap_read(config.regmap, pmic->desc[i].enable_reg,
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&val);
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if ((val & (MAX8907_MASK_OUT5V_VINEN |
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MAX8907_MASK_OUT5V_ENSRC)) !=
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MAX8907_MASK_OUT5V_ENSRC)
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pmic->desc[i].ops = &max8907_out5v_hwctl_ops;
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}
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pmic->rdev[i] = regulator_register(&pmic->desc[i], &config);
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if (IS_ERR(pmic->rdev[i])) {
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dev_err(&pdev->dev,
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"failed to register %s regulator\n",
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pmic->desc[i].name);
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ret = PTR_ERR(pmic->rdev[i]);
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goto err_unregister_regulator;
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}
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}
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return 0;
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err_unregister_regulator:
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while (--i >= 0)
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regulator_unregister(pmic->rdev[i]);
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return ret;
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}
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static __devexit int max8907_regulator_remove(struct platform_device *pdev)
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{
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struct max8907_regulator *pmic;
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int i;
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for (i = 0; i < MAX8907_NUM_REGULATORS; i++)
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regulator_unregister(pmic->rdev[i]);
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return 0;
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}
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static struct platform_driver max8907_regulator_driver = {
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.driver = {
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.name = "max8907-regulator",
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.owner = THIS_MODULE,
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},
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.probe = max8907_regulator_probe,
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.remove = __devexit_p(max8907_regulator_remove),
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};
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static int __init max8907_regulator_init(void)
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{
|
||||
return platform_driver_register(&max8907_regulator_driver);
|
||||
}
|
||||
|
||||
subsys_initcall(max8907_regulator_init);
|
||||
|
||||
static void __exit max8907_reg_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&max8907_regulator_driver);
|
||||
}
|
||||
|
||||
module_exit(max8907_reg_exit);
|
||||
|
||||
MODULE_DESCRIPTION("MAX8907 regulator driver");
|
||||
MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue