384 lines
12 KiB
C
384 lines
12 KiB
C
/*
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* Regulators driver for Marvell 88PM800
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*
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* Copyright (C) 2012 Marvell International Ltd.
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* Joseph(Yossi) Hanin <yhanin@marvell.com>
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* Yi Zhang <yizhang@marvell.com>
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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/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/regmap.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/mfd/88pm80x.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/regulator/of_regulator.h>
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/* LDO1 with DVC[0..3] */
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#define PM800_LDO1_VOUT (0x08) /* VOUT1 */
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#define PM800_LDO1_VOUT_2 (0x09)
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#define PM800_LDO1_VOUT_3 (0x0A)
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#define PM800_LDO2_VOUT (0x0B)
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#define PM800_LDO3_VOUT (0x0C)
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#define PM800_LDO4_VOUT (0x0D)
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#define PM800_LDO5_VOUT (0x0E)
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#define PM800_LDO6_VOUT (0x0F)
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#define PM800_LDO7_VOUT (0x10)
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#define PM800_LDO8_VOUT (0x11)
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#define PM800_LDO9_VOUT (0x12)
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#define PM800_LDO10_VOUT (0x13)
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#define PM800_LDO11_VOUT (0x14)
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#define PM800_LDO12_VOUT (0x15)
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#define PM800_LDO13_VOUT (0x16)
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#define PM800_LDO14_VOUT (0x17)
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#define PM800_LDO15_VOUT (0x18)
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#define PM800_LDO16_VOUT (0x19)
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#define PM800_LDO17_VOUT (0x1A)
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#define PM800_LDO18_VOUT (0x1B)
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#define PM800_LDO19_VOUT (0x1C)
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/* BUCK1 with DVC[0..3] */
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#define PM800_BUCK1 (0x3C)
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#define PM800_BUCK1_1 (0x3D)
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#define PM800_BUCK1_2 (0x3E)
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#define PM800_BUCK1_3 (0x3F)
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#define PM800_BUCK2 (0x40)
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#define PM800_BUCK3 (0x41)
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#define PM800_BUCK3 (0x41)
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#define PM800_BUCK4 (0x42)
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#define PM800_BUCK4_1 (0x43)
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#define PM800_BUCK4_2 (0x44)
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#define PM800_BUCK4_3 (0x45)
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#define PM800_BUCK5 (0x46)
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#define PM800_BUCK_ENA (0x50)
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#define PM800_LDO_ENA1_1 (0x51)
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#define PM800_LDO_ENA1_2 (0x52)
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#define PM800_LDO_ENA1_3 (0x53)
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#define PM800_LDO_ENA2_1 (0x56)
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#define PM800_LDO_ENA2_2 (0x57)
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#define PM800_LDO_ENA2_3 (0x58)
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#define PM800_BUCK1_MISC1 (0x78)
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#define PM800_BUCK3_MISC1 (0x7E)
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#define PM800_BUCK4_MISC1 (0x81)
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#define PM800_BUCK5_MISC1 (0x84)
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struct pm800_regulator_info {
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struct regulator_desc desc;
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int max_ua;
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};
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struct pm800_regulators {
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struct regulator_dev *regulators[PM800_ID_RG_MAX];
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struct pm80x_chip *chip;
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struct regmap *map;
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};
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/*
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* vreg - the buck regs string.
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* ereg - the string for the enable register.
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* ebit - the bit number in the enable register.
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* amax - the current
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* Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
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* not the constant voltage table.
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* n_volt - Number of available selectors
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*/
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#define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges, n_volt) \
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{ \
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.desc = { \
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.name = #vreg, \
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.ops = &pm800_volt_range_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = PM800_ID_##vreg, \
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.owner = THIS_MODULE, \
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.n_voltages = n_volt, \
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.linear_ranges = volt_ranges, \
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.n_linear_ranges = ARRAY_SIZE(volt_ranges), \
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.vsel_reg = PM800_##vreg, \
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.vsel_mask = 0x7f, \
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.enable_reg = PM800_##ereg, \
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.enable_mask = 1 << (ebit), \
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}, \
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.max_ua = (amax), \
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}
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/*
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* vreg - the LDO regs string
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* ereg - the string for the enable register.
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* ebit - the bit number in the enable register.
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* amax - the current
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* volt_table - the LDO voltage table
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* For all the LDOes, there are too many ranges. Using volt_table will be
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* simpler and faster.
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*/
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#define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table) \
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{ \
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.desc = { \
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.name = #vreg, \
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.ops = &pm800_volt_table_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = PM800_ID_##vreg, \
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.owner = THIS_MODULE, \
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.n_voltages = ARRAY_SIZE(ldo_volt_table), \
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.vsel_reg = PM800_##vreg##_VOUT, \
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.vsel_mask = 0x1f, \
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.enable_reg = PM800_##ereg, \
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.enable_mask = 1 << (ebit), \
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.volt_table = ldo_volt_table, \
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}, \
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.max_ua = (amax), \
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}
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/* Ranges are sorted in ascending order. */
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static const struct regulator_linear_range buck1_volt_range[] = {
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{ .min_uV = 600000, .max_uV = 1587500, .min_sel = 0, .max_sel = 0x4f,
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.uV_step = 12500 },
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{ .min_uV = 1600000, .max_uV = 1800000, .min_sel = 0x50,
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.max_sel = 0x54, .uV_step = 50000 },
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};
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/* BUCK 2~5 have same ranges. */
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static const struct regulator_linear_range buck2_5_volt_range[] = {
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{ .min_uV = 600000, .max_uV = 1587500, .min_sel = 0, .max_sel = 0x4f,
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.uV_step = 12500 },
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{ .min_uV = 1600000, .max_uV = 3300000, .min_sel = 0x50,
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.max_sel = 0x72, .uV_step = 50000 },
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};
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static const unsigned int ldo1_volt_table[] = {
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600000, 650000, 700000, 750000, 800000, 850000, 900000, 950000,
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1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
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};
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static const unsigned int ldo2_volt_table[] = {
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1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
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};
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/* LDO 3~17 have same voltage table. */
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static const unsigned int ldo3_17_volt_table[] = {
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1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
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2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
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};
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/* LDO 18~19 have same voltage table. */
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static const unsigned int ldo18_19_volt_table[] = {
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1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
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};
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static int pm800_get_current_limit(struct regulator_dev *rdev)
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{
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struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
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return info->max_ua;
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}
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static struct regulator_ops pm800_volt_range_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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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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.get_current_limit = pm800_get_current_limit,
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};
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static struct regulator_ops pm800_volt_table_ops = {
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_iterate,
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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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.get_current_limit = pm800_get_current_limit,
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};
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/* The array is indexed by id(PM800_ID_XXX) */
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static struct pm800_regulator_info pm800_regulator_info[] = {
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PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
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PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
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PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
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PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
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PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
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PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
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PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
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PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
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PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
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PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
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};
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#define PM800_REGULATOR_OF_MATCH(_name, _id) \
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[PM800_ID_##_id] = { \
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.name = #_name, \
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.driver_data = &pm800_regulator_info[PM800_ID_##_id], \
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}
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static struct of_regulator_match pm800_regulator_matches[] = {
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PM800_REGULATOR_OF_MATCH(buck1, BUCK1),
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PM800_REGULATOR_OF_MATCH(buck2, BUCK2),
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PM800_REGULATOR_OF_MATCH(buck3, BUCK3),
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PM800_REGULATOR_OF_MATCH(buck4, BUCK4),
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PM800_REGULATOR_OF_MATCH(buck5, BUCK5),
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PM800_REGULATOR_OF_MATCH(ldo1, LDO1),
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PM800_REGULATOR_OF_MATCH(ldo2, LDO2),
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PM800_REGULATOR_OF_MATCH(ldo3, LDO3),
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PM800_REGULATOR_OF_MATCH(ldo4, LDO4),
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PM800_REGULATOR_OF_MATCH(ldo5, LDO5),
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PM800_REGULATOR_OF_MATCH(ldo6, LDO6),
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PM800_REGULATOR_OF_MATCH(ldo7, LDO7),
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PM800_REGULATOR_OF_MATCH(ldo8, LDO8),
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PM800_REGULATOR_OF_MATCH(ldo9, LDO9),
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PM800_REGULATOR_OF_MATCH(ldo10, LDO10),
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PM800_REGULATOR_OF_MATCH(ldo11, LDO11),
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PM800_REGULATOR_OF_MATCH(ldo12, LDO12),
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PM800_REGULATOR_OF_MATCH(ldo13, LDO13),
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PM800_REGULATOR_OF_MATCH(ldo14, LDO14),
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PM800_REGULATOR_OF_MATCH(ldo15, LDO15),
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PM800_REGULATOR_OF_MATCH(ldo16, LDO16),
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PM800_REGULATOR_OF_MATCH(ldo17, LDO17),
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PM800_REGULATOR_OF_MATCH(ldo18, LDO18),
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PM800_REGULATOR_OF_MATCH(ldo19, LDO19),
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};
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static int pm800_regulator_dt_init(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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int ret;
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ret = of_regulator_match(&pdev->dev, np,
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pm800_regulator_matches,
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ARRAY_SIZE(pm800_regulator_matches));
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if (ret < 0)
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return ret;
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return 0;
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}
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static int pm800_regulator_probe(struct platform_device *pdev)
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{
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struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
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struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
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struct pm800_regulators *pm800_data;
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struct pm800_regulator_info *info;
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struct regulator_config config = { };
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struct regulator_init_data *init_data;
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int i, ret;
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if (!pdata || pdata->num_regulators == 0) {
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if (IS_ENABLED(CONFIG_OF)) {
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ret = pm800_regulator_dt_init(pdev);
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if (ret)
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return ret;
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} else {
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return -ENODEV;
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}
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} else if (pdata->num_regulators) {
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unsigned int count = 0;
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/* Check whether num_regulator is valid. */
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for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
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if (pdata->regulators[i])
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count++;
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}
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if (count != pdata->num_regulators)
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return -EINVAL;
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} else {
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return -EINVAL;
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}
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pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
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GFP_KERNEL);
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if (!pm800_data) {
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dev_err(&pdev->dev, "Failed to allocate pm800_regualtors");
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return -ENOMEM;
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}
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pm800_data->map = chip->subchip->regmap_power;
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pm800_data->chip = chip;
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platform_set_drvdata(pdev, pm800_data);
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for (i = 0; i < PM800_ID_RG_MAX; i++) {
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if (!pdata || pdata->num_regulators == 0)
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init_data = pm800_regulator_matches[i].init_data;
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else
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init_data = pdata->regulators[i];
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if (!init_data)
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continue;
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info = pm800_regulator_matches[i].driver_data;
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config.dev = &pdev->dev;
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config.init_data = init_data;
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config.driver_data = info;
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config.regmap = pm800_data->map;
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config.of_node = pm800_regulator_matches[i].of_node;
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pm800_data->regulators[i] =
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regulator_register(&info->desc, &config);
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if (IS_ERR(pm800_data->regulators[i])) {
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ret = PTR_ERR(pm800_data->regulators[i]);
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dev_err(&pdev->dev, "Failed to register %s\n",
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info->desc.name);
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while (--i >= 0)
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regulator_unregister(pm800_data->regulators[i]);
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return ret;
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}
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}
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return 0;
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}
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static int pm800_regulator_remove(struct platform_device *pdev)
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{
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struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
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int i;
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for (i = 0; i < PM800_ID_RG_MAX; i++)
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regulator_unregister(pm800_data->regulators[i]);
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return 0;
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}
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static struct platform_driver pm800_regulator_driver = {
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.driver = {
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.name = "88pm80x-regulator",
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.owner = THIS_MODULE,
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},
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.probe = pm800_regulator_probe,
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.remove = pm800_regulator_remove,
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};
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module_platform_driver(pm800_regulator_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
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MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
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MODULE_ALIAS("platform:88pm800-regulator");
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