regulator: AB3100 support
This adds support for the regulators found in the AB3100 Mixed-Signal IC. It further also defines platform data for the ST-Ericsson U300 platform and extends the AB3100 MFD driver so that platform/board data with regulation constraints and an init function can be passed down all the way from the board to the regulators. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Linus Walleij
Samuel Ortiz
Родитель
bd207cfb00
Коммит
d619bc143e
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@ -837,6 +837,8 @@ static int __init ab3100_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct ab3100 *ab3100;
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struct ab3100_platform_data *ab3100_plf_data =
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client->dev.platform_data;
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int err;
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int i;
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@ -920,6 +922,8 @@ static int __init ab3100_probe(struct i2c_client *client,
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for (i = 0; i < ARRAY_SIZE(ab3100_platform_devs); i++) {
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ab3100_platform_devs[i]->dev.parent =
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&client->dev;
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ab3100_platform_devs[i]->dev.platform_data =
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ab3100_plf_data;
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platform_set_drvdata(ab3100_platform_devs[i], ab3100);
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}
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@ -138,5 +138,14 @@ config REGULATOR_MC13783
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Say y here to support the regulators found on the Freescale MC13783
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PMIC.
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config REGULATOR_AB3100
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tristate "ST-Ericsson AB3100 Regulator functions"
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depends on AB3100_CORE
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default y if AB3100_CORE
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help
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These regulators correspond to functionality in the
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AB3100 analog baseband dealing with power regulators
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for the system.
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endif
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@ -21,5 +21,6 @@ obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
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obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
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obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
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obj-$(CONFIG_REGULATOR_MC13783) += mc13783.o
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obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o
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ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
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@ -0,0 +1,694 @@
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/*
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* drivers/regulator/ab3100.c
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*
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* Copyright (C) 2008-2009 ST-Ericsson AB
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* License terms: GNU General Public License (GPL) version 2
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* Low-level control of the AB3100 IC Low Dropout (LDO)
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* regulators, external regulator and buck converter
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* Author: Mattias Wallin <mattias.wallin@stericsson.com>
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* Author: Linus Walleij <linus.walleij@stericsson.com>
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/delay.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/mfd/ab3100.h>
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/* LDO registers and some handy masking definitions for AB3100 */
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#define AB3100_LDO_A 0x40
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#define AB3100_LDO_C 0x41
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#define AB3100_LDO_D 0x42
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#define AB3100_LDO_E 0x43
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#define AB3100_LDO_E_SLEEP 0x44
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#define AB3100_LDO_F 0x45
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#define AB3100_LDO_G 0x46
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#define AB3100_LDO_H 0x47
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#define AB3100_LDO_H_SLEEP_MODE 0
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#define AB3100_LDO_H_SLEEP_EN 2
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#define AB3100_LDO_ON 4
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#define AB3100_LDO_H_VSEL_AC 5
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#define AB3100_LDO_K 0x48
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#define AB3100_LDO_EXT 0x49
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#define AB3100_BUCK 0x4A
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#define AB3100_BUCK_SLEEP 0x4B
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#define AB3100_REG_ON_MASK 0x10
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/**
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* struct ab3100_regulator
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* A struct passed around the individual regulator functions
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* @platform_device: platform device holding this regulator
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* @ab3100: handle to the AB3100 parent chip
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* @plfdata: AB3100 platform data passed in at probe time
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* @regreg: regulator register number in the AB3100
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* @fixed_voltage: a fixed voltage for this regulator, if this
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* 0 the voltages array is used instead.
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* @typ_voltages: an array of available typical voltages for
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* this regulator
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* @voltages_len: length of the array of available voltages
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*/
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struct ab3100_regulator {
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struct regulator_dev *rdev;
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struct ab3100 *ab3100;
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struct ab3100_platform_data *plfdata;
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u8 regreg;
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int fixed_voltage;
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int const *typ_voltages;
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u8 voltages_len;
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};
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/* The order in which registers are initialized */
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static const u8 ab3100_reg_init_order[AB3100_NUM_REGULATORS+2] = {
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AB3100_LDO_A,
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AB3100_LDO_C,
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AB3100_LDO_E,
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AB3100_LDO_E_SLEEP,
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AB3100_LDO_F,
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AB3100_LDO_G,
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AB3100_LDO_H,
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AB3100_LDO_K,
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AB3100_LDO_EXT,
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AB3100_BUCK,
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AB3100_BUCK_SLEEP,
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AB3100_LDO_D,
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};
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/* Preset (hardware defined) voltages for these regulators */
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#define LDO_A_VOLTAGE 2750000
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#define LDO_C_VOLTAGE 2650000
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#define LDO_D_VOLTAGE 2650000
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static const int const ldo_e_buck_typ_voltages[] = {
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1800000,
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1400000,
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1300000,
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1200000,
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1100000,
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1050000,
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900000,
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};
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static const int const ldo_f_typ_voltages[] = {
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1800000,
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1400000,
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1300000,
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1200000,
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1100000,
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1050000,
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2500000,
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2650000,
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};
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static const int const ldo_g_typ_voltages[] = {
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2850000,
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2750000,
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1800000,
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1500000,
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};
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static const int const ldo_h_typ_voltages[] = {
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2750000,
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1800000,
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1500000,
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1200000,
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};
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static const int const ldo_k_typ_voltages[] = {
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2750000,
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1800000,
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};
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/* The regulator devices */
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static struct ab3100_regulator
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ab3100_regulators[AB3100_NUM_REGULATORS] = {
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{
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.regreg = AB3100_LDO_A,
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.fixed_voltage = LDO_A_VOLTAGE,
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},
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{
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.regreg = AB3100_LDO_C,
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.fixed_voltage = LDO_C_VOLTAGE,
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},
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{
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.regreg = AB3100_LDO_D,
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.fixed_voltage = LDO_D_VOLTAGE,
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},
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{
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.regreg = AB3100_LDO_E,
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.typ_voltages = ldo_e_buck_typ_voltages,
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.voltages_len = ARRAY_SIZE(ldo_e_buck_typ_voltages),
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},
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{
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.regreg = AB3100_LDO_F,
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.typ_voltages = ldo_f_typ_voltages,
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.voltages_len = ARRAY_SIZE(ldo_f_typ_voltages),
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},
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{
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.regreg = AB3100_LDO_G,
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.typ_voltages = ldo_g_typ_voltages,
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.voltages_len = ARRAY_SIZE(ldo_g_typ_voltages),
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},
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{
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.regreg = AB3100_LDO_H,
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.typ_voltages = ldo_h_typ_voltages,
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.voltages_len = ARRAY_SIZE(ldo_h_typ_voltages),
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},
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{
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.regreg = AB3100_LDO_K,
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.typ_voltages = ldo_k_typ_voltages,
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.voltages_len = ARRAY_SIZE(ldo_k_typ_voltages),
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},
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{
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.regreg = AB3100_LDO_EXT,
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/* No voltages for the external regulator */
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},
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{
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.regreg = AB3100_BUCK,
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.typ_voltages = ldo_e_buck_typ_voltages,
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.voltages_len = ARRAY_SIZE(ldo_e_buck_typ_voltages),
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},
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};
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/*
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* General functions for enable, disable and is_enabled used for
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* LDO: A,C,E,F,G,H,K,EXT and BUCK
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*/
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static int ab3100_enable_regulator(struct regulator_dev *reg)
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{
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struct ab3100_regulator *abreg = reg->reg_data;
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int err;
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u8 regval;
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err = ab3100_get_register_interruptible(abreg->ab3100, abreg->regreg,
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®val);
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if (err) {
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dev_warn(®->dev, "failed to get regid %d value\n",
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abreg->regreg);
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return err;
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}
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/* The regulator is already on, no reason to go further */
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if (regval & AB3100_REG_ON_MASK)
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return 0;
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regval |= AB3100_REG_ON_MASK;
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err = ab3100_set_register_interruptible(abreg->ab3100, abreg->regreg,
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regval);
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if (err) {
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dev_warn(®->dev, "failed to set regid %d value\n",
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abreg->regreg);
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return err;
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}
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/* Per-regulator power on delay from spec */
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switch (abreg->regreg) {
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case AB3100_LDO_A: /* Fallthrough */
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case AB3100_LDO_C: /* Fallthrough */
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case AB3100_LDO_D: /* Fallthrough */
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case AB3100_LDO_E: /* Fallthrough */
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case AB3100_LDO_H: /* Fallthrough */
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case AB3100_LDO_K:
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udelay(200);
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break;
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case AB3100_LDO_F:
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udelay(600);
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break;
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case AB3100_LDO_G:
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udelay(400);
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break;
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case AB3100_BUCK:
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mdelay(1);
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break;
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default:
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break;
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}
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return 0;
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}
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static int ab3100_disable_regulator(struct regulator_dev *reg)
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{
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struct ab3100_regulator *abreg = reg->reg_data;
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int err;
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u8 regval;
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/*
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* LDO D is a special regulator. When it is disabled, the entire
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* system is shut down. So this is handled specially.
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*/
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if (abreg->regreg == AB3100_LDO_D) {
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int i;
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dev_info(®->dev, "disabling LDO D - shut down system\n");
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/*
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* Set regulators to default values, ignore any errors,
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* we're going DOWN
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*/
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for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) {
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(void) ab3100_set_register_interruptible(abreg->ab3100,
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ab3100_reg_init_order[i],
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abreg->plfdata->reg_initvals[i]);
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}
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/* Setting LDO D to 0x00 cuts the power to the SoC */
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return ab3100_set_register_interruptible(abreg->ab3100,
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AB3100_LDO_D, 0x00U);
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}
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/*
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* All other regulators are handled here
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*/
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err = ab3100_get_register_interruptible(abreg->ab3100, abreg->regreg,
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®val);
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if (err) {
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dev_err(®->dev, "unable to get register 0x%x\n",
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abreg->regreg);
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return err;
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}
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regval &= ~AB3100_REG_ON_MASK;
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return ab3100_set_register_interruptible(abreg->ab3100, abreg->regreg,
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regval);
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}
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static int ab3100_is_enabled_regulator(struct regulator_dev *reg)
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{
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struct ab3100_regulator *abreg = reg->reg_data;
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u8 regval;
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int err;
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err = ab3100_get_register_interruptible(abreg->ab3100, abreg->regreg,
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®val);
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if (err) {
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dev_err(®->dev, "unable to get register 0x%x\n",
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abreg->regreg);
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return err;
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}
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return regval & AB3100_REG_ON_MASK;
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}
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static int ab3100_list_voltage_regulator(struct regulator_dev *reg,
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unsigned selector)
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{
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struct ab3100_regulator *abreg = reg->reg_data;
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if (selector > abreg->voltages_len)
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return -EINVAL;
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return abreg->typ_voltages[selector];
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}
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static int ab3100_get_voltage_regulator(struct regulator_dev *reg)
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{
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struct ab3100_regulator *abreg = reg->reg_data;
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u8 regval;
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int err;
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/* Return the voltage for fixed regulators immediately */
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if (abreg->fixed_voltage)
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return abreg->fixed_voltage;
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/*
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* For variable types, read out setting and index into
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* supplied voltage list.
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*/
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err = ab3100_get_register_interruptible(abreg->ab3100,
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abreg->regreg, ®val);
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if (err) {
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dev_warn(®->dev,
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"failed to get regulator value in register %02x\n",
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abreg->regreg);
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return err;
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}
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/* The 3 highest bits index voltages */
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regval &= 0xE0;
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regval >>= 5;
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if (regval > abreg->voltages_len) {
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dev_err(®->dev,
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"regulator register %02x contains an illegal voltage setting\n",
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abreg->regreg);
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return -EINVAL;
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}
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return abreg->typ_voltages[regval];
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}
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static int ab3100_get_best_voltage_index(struct regulator_dev *reg,
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int min_uV, int max_uV)
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{
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struct ab3100_regulator *abreg = reg->reg_data;
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int i;
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int bestmatch;
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int bestindex;
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/*
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* Locate the minimum voltage fitting the criteria on
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* this regulator. The switchable voltages are not
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* in strict falling order so we need to check them
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* all for the best match.
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*/
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bestmatch = INT_MAX;
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bestindex = -1;
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for (i = 0; i < abreg->voltages_len; i++) {
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if (abreg->typ_voltages[i] <= max_uV &&
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abreg->typ_voltages[i] >= min_uV &&
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abreg->typ_voltages[i] < bestmatch) {
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bestmatch = abreg->typ_voltages[i];
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bestindex = i;
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}
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}
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if (bestindex < 0) {
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dev_warn(®->dev, "requested %d<=x<=%d uV, out of range!\n",
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min_uV, max_uV);
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return -EINVAL;
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}
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return bestindex;
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}
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static int ab3100_set_voltage_regulator(struct regulator_dev *reg,
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int min_uV, int max_uV)
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{
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struct ab3100_regulator *abreg = reg->reg_data;
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u8 regval;
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int err;
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int bestindex;
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bestindex = ab3100_get_best_voltage_index(reg, min_uV, max_uV);
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if (bestindex < 0)
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return bestindex;
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err = ab3100_get_register_interruptible(abreg->ab3100,
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abreg->regreg, ®val);
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if (err) {
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dev_warn(®->dev,
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"failed to get regulator register %02x\n",
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abreg->regreg);
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return err;
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}
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/* The highest three bits control the variable regulators */
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regval &= ~0xE0;
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regval |= (bestindex << 5);
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err = ab3100_set_register_interruptible(abreg->ab3100,
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abreg->regreg, regval);
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if (err)
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dev_warn(®->dev, "failed to set regulator register %02x\n",
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abreg->regreg);
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return err;
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}
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static int ab3100_set_suspend_voltage_regulator(struct regulator_dev *reg,
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int uV)
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{
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struct ab3100_regulator *abreg = reg->reg_data;
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u8 regval;
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int err;
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int bestindex;
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u8 targetreg;
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if (abreg->regreg == AB3100_LDO_E)
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targetreg = AB3100_LDO_E_SLEEP;
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else if (abreg->regreg == AB3100_BUCK)
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targetreg = AB3100_BUCK_SLEEP;
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else
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return -EINVAL;
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/* LDO E and BUCK have special suspend voltages you can set */
|
||||
bestindex = ab3100_get_best_voltage_index(reg, uV, uV);
|
||||
|
||||
err = ab3100_get_register_interruptible(abreg->ab3100,
|
||||
targetreg, ®val);
|
||||
if (err) {
|
||||
dev_warn(®->dev,
|
||||
"failed to get regulator register %02x\n",
|
||||
targetreg);
|
||||
return err;
|
||||
}
|
||||
|
||||
/* The highest three bits control the variable regulators */
|
||||
regval &= ~0xE0;
|
||||
regval |= (bestindex << 5);
|
||||
|
||||
err = ab3100_set_register_interruptible(abreg->ab3100,
|
||||
targetreg, regval);
|
||||
if (err)
|
||||
dev_warn(®->dev, "failed to set regulator register %02x\n",
|
||||
abreg->regreg);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/*
|
||||
* The external regulator can just define a fixed voltage.
|
||||
*/
|
||||
static int ab3100_get_voltage_regulator_external(struct regulator_dev *reg)
|
||||
{
|
||||
struct ab3100_regulator *abreg = reg->reg_data;
|
||||
|
||||
return abreg->plfdata->external_voltage;
|
||||
}
|
||||
|
||||
static struct regulator_ops regulator_ops_fixed = {
|
||||
.enable = ab3100_enable_regulator,
|
||||
.disable = ab3100_disable_regulator,
|
||||
.is_enabled = ab3100_is_enabled_regulator,
|
||||
.get_voltage = ab3100_get_voltage_regulator,
|
||||
};
|
||||
|
||||
static struct regulator_ops regulator_ops_variable = {
|
||||
.enable = ab3100_enable_regulator,
|
||||
.disable = ab3100_disable_regulator,
|
||||
.is_enabled = ab3100_is_enabled_regulator,
|
||||
.get_voltage = ab3100_get_voltage_regulator,
|
||||
.set_voltage = ab3100_set_voltage_regulator,
|
||||
.list_voltage = ab3100_list_voltage_regulator,
|
||||
};
|
||||
|
||||
static struct regulator_ops regulator_ops_variable_sleepable = {
|
||||
.enable = ab3100_enable_regulator,
|
||||
.disable = ab3100_disable_regulator,
|
||||
.is_enabled = ab3100_is_enabled_regulator,
|
||||
.get_voltage = ab3100_get_voltage_regulator,
|
||||
.set_voltage = ab3100_set_voltage_regulator,
|
||||
.set_suspend_voltage = ab3100_set_suspend_voltage_regulator,
|
||||
.list_voltage = ab3100_list_voltage_regulator,
|
||||
};
|
||||
|
||||
/*
|
||||
* LDO EXT is an external regulator so it is really
|
||||
* not possible to set any voltage locally here, AB3100
|
||||
* is an on/off switch plain an simple. The external
|
||||
* voltage is defined in the board set-up if any.
|
||||
*/
|
||||
static struct regulator_ops regulator_ops_external = {
|
||||
.enable = ab3100_enable_regulator,
|
||||
.disable = ab3100_disable_regulator,
|
||||
.is_enabled = ab3100_is_enabled_regulator,
|
||||
.get_voltage = ab3100_get_voltage_regulator_external,
|
||||
};
|
||||
|
||||
static struct regulator_desc
|
||||
ab3100_regulator_desc[AB3100_NUM_REGULATORS] = {
|
||||
{
|
||||
.name = "LDO_A",
|
||||
.id = AB3100_LDO_A,
|
||||
.ops = ®ulator_ops_fixed,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
{
|
||||
.name = "LDO_C",
|
||||
.id = AB3100_LDO_C,
|
||||
.ops = ®ulator_ops_fixed,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
{
|
||||
.name = "LDO_D",
|
||||
.id = AB3100_LDO_D,
|
||||
.ops = ®ulator_ops_fixed,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
{
|
||||
.name = "LDO_E",
|
||||
.id = AB3100_LDO_E,
|
||||
.ops = ®ulator_ops_variable_sleepable,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
{
|
||||
.name = "LDO_F",
|
||||
.id = AB3100_LDO_F,
|
||||
.ops = ®ulator_ops_variable,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
{
|
||||
.name = "LDO_G",
|
||||
.id = AB3100_LDO_G,
|
||||
.ops = ®ulator_ops_variable,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
{
|
||||
.name = "LDO_H",
|
||||
.id = AB3100_LDO_H,
|
||||
.ops = ®ulator_ops_variable,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
{
|
||||
.name = "LDO_K",
|
||||
.id = AB3100_LDO_K,
|
||||
.ops = ®ulator_ops_variable,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
{
|
||||
.name = "LDO_EXT",
|
||||
.id = AB3100_LDO_EXT,
|
||||
.ops = ®ulator_ops_external,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
{
|
||||
.name = "BUCK",
|
||||
.id = AB3100_BUCK,
|
||||
.ops = ®ulator_ops_variable_sleepable,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
},
|
||||
};
|
||||
|
||||
/*
|
||||
* NOTE: the following functions are regulators pluralis - it is the
|
||||
* binding to the AB3100 core driver and the parent platform device
|
||||
* for all the different regulators.
|
||||
*/
|
||||
|
||||
static int __init ab3100_regulators_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct ab3100_platform_data *plfdata = pdev->dev.platform_data;
|
||||
struct ab3100 *ab3100 = platform_get_drvdata(pdev);
|
||||
int err = 0;
|
||||
u8 data;
|
||||
int i;
|
||||
|
||||
/* Check chip state */
|
||||
err = ab3100_get_register_interruptible(ab3100,
|
||||
AB3100_LDO_D, &data);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "could not read initial status of LDO_D\n");
|
||||
return err;
|
||||
}
|
||||
if (data & 0x10)
|
||||
dev_notice(&pdev->dev,
|
||||
"chip is already in active mode (Warm start)\n");
|
||||
else
|
||||
dev_notice(&pdev->dev,
|
||||
"chip is in inactive mode (Cold start)\n");
|
||||
|
||||
/* Set up regulators */
|
||||
for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) {
|
||||
err = ab3100_set_register_interruptible(ab3100,
|
||||
ab3100_reg_init_order[i],
|
||||
plfdata->reg_initvals[i]);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "regulator initialization failed with error %d\n",
|
||||
err);
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
if (err) {
|
||||
dev_err(&pdev->dev,
|
||||
"LDO D regulator initialization failed with error %d\n",
|
||||
err);
|
||||
return err;
|
||||
}
|
||||
|
||||
/* Register the regulators */
|
||||
for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
|
||||
struct ab3100_regulator *reg = &ab3100_regulators[i];
|
||||
struct regulator_dev *rdev;
|
||||
|
||||
/*
|
||||
* Initialize per-regulator struct.
|
||||
* Inherit platform data, this comes down from the
|
||||
* i2c boarddata, from the machine. So if you want to
|
||||
* see what it looks like for a certain machine, go
|
||||
* into the machine I2C setup.
|
||||
*/
|
||||
reg->ab3100 = ab3100;
|
||||
reg->plfdata = plfdata;
|
||||
|
||||
/*
|
||||
* Register the regulator, pass around
|
||||
* the ab3100_regulator struct
|
||||
*/
|
||||
rdev = regulator_register(&ab3100_regulator_desc[i],
|
||||
&pdev->dev,
|
||||
&plfdata->reg_constraints[i],
|
||||
reg);
|
||||
|
||||
if (IS_ERR(rdev)) {
|
||||
err = PTR_ERR(rdev);
|
||||
dev_err(&pdev->dev,
|
||||
"%s: failed to register regulator %s err %d\n",
|
||||
__func__, ab3100_regulator_desc[i].name,
|
||||
err);
|
||||
i--;
|
||||
/* remove the already registered regulators */
|
||||
while (i > 0) {
|
||||
regulator_unregister(ab3100_regulators[i].rdev);
|
||||
i--;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
/* Then set a pointer back to the registered regulator */
|
||||
reg->rdev = rdev;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __exit ab3100_regulators_remove(struct platform_device *pdev)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
|
||||
struct ab3100_regulator *reg = &ab3100_regulators[i];
|
||||
|
||||
regulator_unregister(reg->rdev);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver ab3100_regulators_driver = {
|
||||
.driver = {
|
||||
.name = "ab3100-regulators",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = ab3100_regulators_probe,
|
||||
.remove = __exit_p(ab3100_regulators_remove),
|
||||
};
|
||||
|
||||
static __init int ab3100_regulators_init(void)
|
||||
{
|
||||
return platform_driver_register(&ab3100_regulators_driver);
|
||||
}
|
||||
|
||||
static __exit void ab3100_regulators_exit(void)
|
||||
{
|
||||
platform_driver_register(&ab3100_regulators_driver);
|
||||
}
|
||||
|
||||
subsys_initcall(ab3100_regulators_init);
|
||||
module_exit(ab3100_regulators_exit);
|
||||
|
||||
MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>");
|
||||
MODULE_DESCRIPTION("AB3100 Regulator driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:ab3100-regulators");
|
||||
|
|
@ -7,6 +7,7 @@
|
|||
|
||||
#include <linux/device.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <linux/regulator/machine.h>
|
||||
|
||||
#ifndef MFD_AB3100_H
|
||||
#define MFD_AB3100_H
|
||||
|
|
@ -57,6 +58,14 @@
|
|||
#define AB3100_STR_BATT_REMOVAL (0x40)
|
||||
#define AB3100_STR_VBUS (0x80)
|
||||
|
||||
/*
|
||||
* AB3100 contains 8 regulators, one external regulator controller
|
||||
* and a buck converter, further the LDO E and buck converter can
|
||||
* have separate settings if they are in sleep mode, this is
|
||||
* modeled as a separate regulator.
|
||||
*/
|
||||
#define AB3100_NUM_REGULATORS 10
|
||||
|
||||
/**
|
||||
* struct ab3100
|
||||
* @access_mutex: lock out concurrent accesses to the AB3100 registers
|
||||
|
|
@ -87,6 +96,25 @@ struct ab3100 {
|
|||
bool startup_events_read;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ab3100_platform_data
|
||||
* Data supplied to initialize board connections to the AB3100
|
||||
* @reg_constraints: regulator constraints for target board
|
||||
* the order of these constraints are: LDO A, C, D, E,
|
||||
* F, G, H, K, EXT and BUCK.
|
||||
* @reg_initvals: initial values for the regulator registers
|
||||
* plus two sleep settings for LDO E and the BUCK converter.
|
||||
* exactly AB3100_NUM_REGULATORS+2 values must be sent in.
|
||||
* Order: LDO A, C, E, E sleep, F, G, H, K, EXT, BUCK,
|
||||
* BUCK sleep, LDO D. (LDO D need to be initialized last.)
|
||||
* @external_voltage: voltage level of the external regulator.
|
||||
*/
|
||||
struct ab3100_platform_data {
|
||||
struct regulator_init_data reg_constraints[AB3100_NUM_REGULATORS];
|
||||
u8 reg_initvals[AB3100_NUM_REGULATORS+2];
|
||||
int external_voltage;
|
||||
};
|
||||
|
||||
int ab3100_set_register_interruptible(struct ab3100 *ab3100, u8 reg, u8 regval);
|
||||
int ab3100_get_register_interruptible(struct ab3100 *ab3100, u8 reg, u8 *regval);
|
||||
int ab3100_get_register_page_interruptible(struct ab3100 *ab3100,
|
||||
|
|
|
|||
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