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9234c636c5
The SD, ALDO, and DLDO vlotage tables are composed of linear ranges. This patch converts as3711 to use newly introduced helpers for multiple linear ranges. Below is the voltage table on datasheet: SD: 00h: DC/DC powered down 01h-40h: Volt = 0.6V + sdx_vsel * 12.5mV 41h-70h: Volt = 1.4V + (sdx_vsel - 40h) * 25mV 71h-7Fh: Volt = 2.6V + (sdx_vsel - 70h) * 50mV ALDO: 0h-0Fh: 1.2V + ldox_vsel * 50mV 10h-1Fh: 1.8V + (ldox_vsel - 10h) * 100mV DLDO: 00h-10h: Volt = 0.9V + ldox_vsel * 50mV 11h-1fh: Do not use 20h-3fh: Volt = 1.75V + (ldox_vsel - 20h) * 50mV Note, when convert to use linear ranges APIs, the equation for SD needs below adjustment because the linear ranges APIs wiil substract range->min_sel when apply the equation. SD ( the equation to be used with linear ranges APIs ) 01h-40h: Volt = 0.6125V + (sdx_vsel - 1h) * 12.5mV 41h-70h: Volt = 1.425V + (sdx_vsel - 41h) * 25mV 71h-7Fh: Volt = 2.650V + (sdx_vsel - 71h) * 50mV Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
330 lines
9.8 KiB
C
330 lines
9.8 KiB
C
/*
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* AS3711 PMIC regulator driver, using DCDC Step Down and LDO supplies
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*
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* Copyright (C) 2012 Renesas Electronics Corporation
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* Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
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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 version 2 of the GNU General Public License 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/as3711.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/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/slab.h>
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struct as3711_regulator_info {
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struct regulator_desc desc;
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unsigned int max_uV;
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};
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struct as3711_regulator {
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struct as3711_regulator_info *reg_info;
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struct regulator_dev *rdev;
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};
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/*
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* The regulator API supports 4 modes of operataion: FAST, NORMAL, IDLE and
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* STANDBY. We map them in the following way to AS3711 SD1-4 DCDC modes:
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* FAST: sdX_fast=1
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* NORMAL: low_noise=1
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* IDLE: low_noise=0
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*/
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static int as3711_set_mode_sd(struct regulator_dev *rdev, unsigned int mode)
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{
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unsigned int fast_bit = rdev->desc->enable_mask,
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low_noise_bit = fast_bit << 4;
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u8 val;
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switch (mode) {
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case REGULATOR_MODE_FAST:
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val = fast_bit | low_noise_bit;
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break;
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case REGULATOR_MODE_NORMAL:
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val = low_noise_bit;
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break;
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case REGULATOR_MODE_IDLE:
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val = 0;
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break;
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default:
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return -EINVAL;
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}
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return regmap_update_bits(rdev->regmap, AS3711_SD_CONTROL_1,
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low_noise_bit | fast_bit, val);
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}
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static unsigned int as3711_get_mode_sd(struct regulator_dev *rdev)
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{
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unsigned int fast_bit = rdev->desc->enable_mask,
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low_noise_bit = fast_bit << 4, mask = fast_bit | low_noise_bit;
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unsigned int val;
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int ret = regmap_read(rdev->regmap, AS3711_SD_CONTROL_1, &val);
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if (ret < 0)
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return ret;
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if ((val & mask) == mask)
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return REGULATOR_MODE_FAST;
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if ((val & mask) == low_noise_bit)
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return REGULATOR_MODE_NORMAL;
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if (!(val & mask))
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return REGULATOR_MODE_IDLE;
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return -EINVAL;
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}
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static struct regulator_ops as3711_sd_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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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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.get_mode = as3711_get_mode_sd,
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.set_mode = as3711_set_mode_sd,
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};
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static struct regulator_ops as3711_aldo_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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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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};
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static struct regulator_ops as3711_dldo_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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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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};
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static const struct regulator_linear_range as3711_sd_ranges[] = {
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{ .min_uV = 612500, .max_uV = 1400000,
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.min_sel = 0x1, .max_sel = 0x40, .uV_step = 12500 },
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{ .min_uV = 1425000, .max_uV = 2600000,
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.min_sel = 0x41, .max_sel = 0x70, .uV_step = 25000 },
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{ .min_uV = 2650000, .max_uV = 3350000,
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.min_sel = 0x71, .max_sel = 0x7f, .uV_step = 50000 },
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};
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static const struct regulator_linear_range as3711_aldo_ranges[] = {
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{ .min_uV = 1200000, .max_uV = 1950000,
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.min_sel = 0, .max_sel = 0xf, .uV_step = 50000 },
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{ .min_uV = 1800000, .max_uV = 3300000,
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.min_sel = 0x10, .max_sel = 0x1f, .uV_step = 100000 },
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};
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static const struct regulator_linear_range as3711_dldo_ranges[] = {
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{ .min_uV = 900000, .max_uV = 1700000,
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.min_sel = 0, .max_sel = 0x10, .uV_step = 50000 },
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{ .min_uV = 1750000, .max_uV = 3300000,
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.min_sel = 0x20, .max_sel = 0x3f, .uV_step = 50000 },
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};
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#define AS3711_REG(_id, _en_reg, _en_bit, _vmask, _vshift, _min_uV, _max_uV, _sfx) \
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[AS3711_REGULATOR_ ## _id] = { \
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.desc = { \
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.name = "as3711-regulator-" # _id, \
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.id = AS3711_REGULATOR_ ## _id, \
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.n_voltages = (_vmask + 1), \
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.ops = &as3711_ ## _sfx ## _ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.vsel_reg = AS3711_ ## _id ## _VOLTAGE, \
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.vsel_mask = _vmask << _vshift, \
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.enable_reg = AS3711_ ## _en_reg, \
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.enable_mask = BIT(_en_bit), \
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.min_uV = _min_uV, \
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.linear_ranges = as3711_ ## _sfx ## _ranges, \
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.n_linear_ranges = ARRAY_SIZE(as3711_ ## _sfx ## _ranges), \
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}, \
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.max_uV = _max_uV, \
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}
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static struct as3711_regulator_info as3711_reg_info[] = {
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AS3711_REG(SD_1, SD_CONTROL, 0, 0x7f, 0, 612500, 3350000, sd),
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AS3711_REG(SD_2, SD_CONTROL, 1, 0x7f, 0, 612500, 3350000, sd),
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AS3711_REG(SD_3, SD_CONTROL, 2, 0x7f, 0, 612500, 3350000, sd),
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AS3711_REG(SD_4, SD_CONTROL, 3, 0x7f, 0, 612500, 3350000, sd),
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AS3711_REG(LDO_1, LDO_1_VOLTAGE, 7, 0x1f, 0, 1200000, 3300000, aldo),
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AS3711_REG(LDO_2, LDO_2_VOLTAGE, 7, 0x1f, 0, 1200000, 3300000, aldo),
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AS3711_REG(LDO_3, LDO_3_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_4, LDO_4_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_5, LDO_5_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_6, LDO_6_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_7, LDO_7_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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AS3711_REG(LDO_8, LDO_8_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
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/* StepUp output voltage depends on supplying regulator */
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};
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#define AS3711_REGULATOR_NUM ARRAY_SIZE(as3711_reg_info)
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static struct of_regulator_match
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as3711_regulator_matches[AS3711_REGULATOR_NUM] = {
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[AS3711_REGULATOR_SD_1] = { .name = "sd1" },
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[AS3711_REGULATOR_SD_2] = { .name = "sd2" },
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[AS3711_REGULATOR_SD_3] = { .name = "sd3" },
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[AS3711_REGULATOR_SD_4] = { .name = "sd4" },
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[AS3711_REGULATOR_LDO_1] = { .name = "ldo1" },
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[AS3711_REGULATOR_LDO_2] = { .name = "ldo2" },
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[AS3711_REGULATOR_LDO_3] = { .name = "ldo3" },
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[AS3711_REGULATOR_LDO_4] = { .name = "ldo4" },
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[AS3711_REGULATOR_LDO_5] = { .name = "ldo5" },
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[AS3711_REGULATOR_LDO_6] = { .name = "ldo6" },
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[AS3711_REGULATOR_LDO_7] = { .name = "ldo7" },
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[AS3711_REGULATOR_LDO_8] = { .name = "ldo8" },
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};
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static int as3711_regulator_parse_dt(struct device *dev,
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struct device_node **of_node, const int count)
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{
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struct as3711_regulator_pdata *pdata = dev_get_platdata(dev);
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struct device_node *regulators =
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of_find_node_by_name(dev->parent->of_node, "regulators");
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struct of_regulator_match *match;
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int ret, i;
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if (!regulators) {
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dev_err(dev, "regulator node not found\n");
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return -ENODEV;
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}
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ret = of_regulator_match(dev->parent, regulators,
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as3711_regulator_matches, count);
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of_node_put(regulators);
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if (ret < 0) {
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dev_err(dev, "Error parsing regulator init data: %d\n", ret);
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return ret;
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}
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for (i = 0, match = as3711_regulator_matches; i < count; i++, match++)
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if (match->of_node) {
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pdata->init_data[i] = match->init_data;
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of_node[i] = match->of_node;
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}
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return 0;
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}
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static int as3711_regulator_probe(struct platform_device *pdev)
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{
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struct as3711_regulator_pdata *pdata = dev_get_platdata(&pdev->dev);
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struct as3711 *as3711 = dev_get_drvdata(pdev->dev.parent);
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struct regulator_init_data *reg_data;
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struct regulator_config config = {.dev = &pdev->dev,};
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struct as3711_regulator *reg = NULL;
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struct as3711_regulator *regs;
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struct device_node *of_node[AS3711_REGULATOR_NUM] = {};
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struct regulator_dev *rdev;
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struct as3711_regulator_info *ri;
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int ret;
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int id;
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if (!pdata) {
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dev_err(&pdev->dev, "No platform data...\n");
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return -ENODEV;
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}
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if (pdev->dev.parent->of_node) {
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ret = as3711_regulator_parse_dt(&pdev->dev, of_node, AS3711_REGULATOR_NUM);
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if (ret < 0) {
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dev_err(&pdev->dev, "DT parsing failed: %d\n", ret);
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return ret;
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}
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}
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regs = devm_kzalloc(&pdev->dev, AS3711_REGULATOR_NUM *
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sizeof(struct as3711_regulator), GFP_KERNEL);
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if (!regs) {
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dev_err(&pdev->dev, "Memory allocation failed exiting..\n");
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return -ENOMEM;
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}
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for (id = 0, ri = as3711_reg_info; id < AS3711_REGULATOR_NUM; ++id, ri++) {
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reg_data = pdata->init_data[id];
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/* No need to register if there is no regulator data */
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if (!reg_data)
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continue;
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reg = ®s[id];
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reg->reg_info = ri;
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config.init_data = reg_data;
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config.driver_data = reg;
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config.regmap = as3711->regmap;
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config.of_node = of_node[id];
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rdev = regulator_register(&ri->desc, &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "Failed to register regulator %s\n",
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ri->desc.name);
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ret = PTR_ERR(rdev);
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goto eregreg;
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}
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reg->rdev = rdev;
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}
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platform_set_drvdata(pdev, regs);
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return 0;
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eregreg:
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while (--id >= 0)
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regulator_unregister(regs[id].rdev);
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return ret;
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}
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static int as3711_regulator_remove(struct platform_device *pdev)
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{
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struct as3711_regulator *regs = platform_get_drvdata(pdev);
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int id;
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for (id = 0; id < AS3711_REGULATOR_NUM; ++id)
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regulator_unregister(regs[id].rdev);
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return 0;
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}
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static struct platform_driver as3711_regulator_driver = {
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.driver = {
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.name = "as3711-regulator",
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.owner = THIS_MODULE,
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},
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.probe = as3711_regulator_probe,
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.remove = as3711_regulator_remove,
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};
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static int __init as3711_regulator_init(void)
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{
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return platform_driver_register(&as3711_regulator_driver);
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}
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subsys_initcall(as3711_regulator_init);
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static void __exit as3711_regulator_exit(void)
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{
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platform_driver_unregister(&as3711_regulator_driver);
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}
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module_exit(as3711_regulator_exit);
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MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
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MODULE_DESCRIPTION("AS3711 regulator driver");
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MODULE_ALIAS("platform:as3711-regulator");
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MODULE_LICENSE("GPL v2");
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