2cd64ae3d5
The regulator module consists of 4 DCDCs, 8 LDOs and 2 switches. The output voltages are configurable and are meant to supply power to the main processor and other components Signed-off-by: Chris Zhong <zyw@rock-chips.com> Signed-off-by: Mark Brown <broonie@linaro.org>
411 lines
11 KiB
C
411 lines
11 KiB
C
/*
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* Regulator driver for Rockchip RK808
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*
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* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
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*
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* Author: Chris Zhong <zyw@rock-chips.com>
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* Author: Zhang Qing <zhangqing@rock-chips.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/rk808.h>
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#include <linux/of.h>
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#include <linux/of_device.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/regmap.h>
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#include <linux/slab.h>
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/*
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* Field Definitions.
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*/
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#define RK808_BUCK_VSEL_MASK 0x3f
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#define RK808_BUCK4_VSEL_MASK 0xf
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#define RK808_LDO_VSEL_MASK 0x1f
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static const int buck_set_vol_base_addr[] = {
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RK808_BUCK1_ON_VSEL_REG,
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RK808_BUCK2_ON_VSEL_REG,
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RK808_BUCK3_CONFIG_REG,
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RK808_BUCK4_ON_VSEL_REG,
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};
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static const int buck_contr_base_addr[] = {
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RK808_BUCK1_CONFIG_REG,
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RK808_BUCK2_CONFIG_REG,
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RK808_BUCK3_CONFIG_REG,
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RK808_BUCK4_CONFIG_REG,
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};
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#define rk808_BUCK_SET_VOL_REG(x) (buck_set_vol_base_addr[x])
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#define rk808_BUCK_CONTR_REG(x) (buck_contr_base_addr[x])
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#define rk808_LDO_SET_VOL_REG(x) (ldo_set_vol_base_addr[x])
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static const int ldo_set_vol_base_addr[] = {
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RK808_LDO1_ON_VSEL_REG,
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RK808_LDO2_ON_VSEL_REG,
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RK808_LDO3_ON_VSEL_REG,
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RK808_LDO4_ON_VSEL_REG,
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RK808_LDO5_ON_VSEL_REG,
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RK808_LDO6_ON_VSEL_REG,
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RK808_LDO7_ON_VSEL_REG,
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RK808_LDO8_ON_VSEL_REG,
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};
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/*
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* rk808 voltage number
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*/
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static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(700000, 0, 63, 12500),
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};
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static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
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};
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static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
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};
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static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
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REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
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};
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static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
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};
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static struct regulator_ops rk808_reg_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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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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static struct regulator_ops rk808_switch_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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static const struct regulator_desc rk808_reg[] = {
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{
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.name = "DCDC_REG1",
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.id = RK808_ID_DCDC1,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 64,
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.linear_ranges = rk808_buck_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
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.vsel_reg = RK808_BUCK1_ON_VSEL_REG,
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.vsel_mask = RK808_BUCK_VSEL_MASK,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(0),
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.owner = THIS_MODULE,
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}, {
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.name = "DCDC_REG2",
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.id = RK808_ID_DCDC2,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 64,
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.linear_ranges = rk808_buck_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
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.vsel_reg = RK808_BUCK2_ON_VSEL_REG,
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.vsel_mask = RK808_BUCK_VSEL_MASK,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(1),
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.owner = THIS_MODULE,
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}, {
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.name = "DCDC_REG3",
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.id = RK808_ID_DCDC3,
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.ops = &rk808_switch_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 1,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(2),
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.owner = THIS_MODULE,
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}, {
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.name = "DCDC_REG4",
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.id = RK808_ID_DCDC4,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_buck4_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
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.vsel_reg = RK808_BUCK4_ON_VSEL_REG,
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.vsel_mask = RK808_BUCK4_VSEL_MASK,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(3),
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG1",
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.id = RK808_ID_LDO1,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_ldo_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
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.vsel_reg = RK808_LDO1_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(0),
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG2",
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.id = RK808_ID_LDO2,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_ldo_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
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.vsel_reg = RK808_LDO2_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(1),
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG3",
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.id = RK808_ID_LDO3,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 16,
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.linear_ranges = rk808_ldo3_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
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.vsel_reg = RK808_LDO3_ON_VSEL_REG,
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.vsel_mask = RK808_BUCK4_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(2),
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG4",
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.id = RK808_ID_LDO4,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_ldo_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
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.vsel_reg = RK808_LDO4_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(3),
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG5",
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.id = RK808_ID_LDO5,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_ldo_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
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.vsel_reg = RK808_LDO5_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(4),
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG6",
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.id = RK808_ID_LDO6,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 18,
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.linear_ranges = rk808_ldo6_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
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.vsel_reg = RK808_LDO6_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(5),
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG7",
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.id = RK808_ID_LDO7,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 18,
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.linear_ranges = rk808_ldo6_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
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.vsel_reg = RK808_LDO7_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(6),
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.owner = THIS_MODULE,
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}, {
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.name = "LDO_REG8",
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.id = RK808_ID_LDO8,
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.ops = &rk808_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 17,
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.linear_ranges = rk808_ldo_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
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.vsel_reg = RK808_LDO8_ON_VSEL_REG,
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.vsel_mask = RK808_LDO_VSEL_MASK,
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.enable_reg = RK808_LDO_EN_REG,
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.enable_mask = BIT(7),
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.owner = THIS_MODULE,
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}, {
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.name = "SWITCH_REG1",
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.id = RK808_ID_SWITCH1,
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.ops = &rk808_switch_ops,
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.type = REGULATOR_VOLTAGE,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(5),
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.owner = THIS_MODULE,
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}, {
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.name = "SWITCH_REG2",
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.id = RK808_ID_SWITCH2,
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.ops = &rk808_switch_ops,
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.type = REGULATOR_VOLTAGE,
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.enable_reg = RK808_DCDC_EN_REG,
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.enable_mask = BIT(6),
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.owner = THIS_MODULE,
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},
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};
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static struct of_regulator_match rk808_reg_matches[] = {
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[RK808_ID_DCDC1] = { .name = "DCDC_REG1" },
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[RK808_ID_DCDC2] = { .name = "DCDC_REG2" },
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[RK808_ID_DCDC3] = { .name = "DCDC_REG3" },
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[RK808_ID_DCDC4] = { .name = "DCDC_REG4" },
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[RK808_ID_LDO1] = { .name = "LDO_REG1" },
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[RK808_ID_LDO2] = { .name = "LDO_REG2" },
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[RK808_ID_LDO3] = { .name = "LDO_REG3" },
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[RK808_ID_LDO4] = { .name = "LDO_REG4" },
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[RK808_ID_LDO5] = { .name = "LDO_REG5" },
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[RK808_ID_LDO6] = { .name = "LDO_REG6" },
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[RK808_ID_LDO7] = { .name = "LDO_REG7" },
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[RK808_ID_LDO8] = { .name = "LDO_REG8" },
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[RK808_ID_SWITCH1] = { .name = "SWITCH_REG1" },
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[RK808_ID_SWITCH2] = { .name = "SWITCH_REG2" },
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};
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static int rk808_regulator_dts(struct rk808 *rk808)
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{
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struct rk808_board *pdata = rk808->pdata;
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struct device_node *np, *reg_np;
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int i, ret;
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np = rk808->dev->of_node;
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if (!np) {
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dev_err(rk808->dev, "could not find pmic sub-node\n");
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return -ENXIO;
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}
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reg_np = of_get_child_by_name(np, "regulators");
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if (!reg_np)
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return -ENXIO;
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ret = of_regulator_match(rk808->dev, reg_np, rk808_reg_matches,
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RK808_NUM_REGULATORS);
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if (ret < 0) {
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dev_err(rk808->dev,
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"failed to parse regulator data: %d\n", ret);
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return ret;
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}
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for (i = 0; i < RK808_NUM_REGULATORS; i++) {
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if (!rk808_reg_matches[i].init_data ||
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!rk808_reg_matches[i].of_node)
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continue;
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pdata->rk808_init_data[i] = rk808_reg_matches[i].init_data;
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pdata->of_node[i] = rk808_reg_matches[i].of_node;
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}
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return 0;
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}
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static int rk808_regulator_probe(struct platform_device *pdev)
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{
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struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
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struct rk808_board *pdata;
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struct regulator_config config;
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struct regulator_dev *rk808_rdev;
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struct regulator_init_data *reg_data;
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int i = 0;
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int ret = 0;
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dev_dbg(rk808->dev, "%s\n", __func__);
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if (!rk808) {
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dev_err(rk808->dev, "%s no rk808\n", __func__);
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return -ENODEV;
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}
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pdata = rk808->pdata;
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if (!pdata) {
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dev_warn(rk808->dev, "%s no pdata, create it\n", __func__);
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pdata = devm_kzalloc(rk808->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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}
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ret = rk808_regulator_dts(rk808);
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if (ret)
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return ret;
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rk808->num_regulators = RK808_NUM_REGULATORS;
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rk808->rdev = devm_kzalloc(&pdev->dev, RK808_NUM_REGULATORS *
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sizeof(struct regulator_dev *), GFP_KERNEL);
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if (!rk808->rdev)
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return -ENOMEM;
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/* Instantiate the regulators */
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for (i = 0; i < RK808_NUM_REGULATORS; i++) {
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reg_data = pdata->rk808_init_data[i];
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if (!reg_data)
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continue;
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config.dev = rk808->dev;
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config.driver_data = rk808;
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config.regmap = rk808->regmap;
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if (rk808->dev->of_node)
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config.of_node = pdata->of_node[i];
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reg_data->supply_regulator = rk808_reg[i].name;
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config.init_data = reg_data;
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rk808_rdev = devm_regulator_register(&pdev->dev,
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&rk808_reg[i], &config);
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if (IS_ERR(rk808_rdev)) {
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dev_err(rk808->dev,
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"failed to register %d regulator\n", i);
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return PTR_ERR(rk808_rdev);
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}
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rk808->rdev[i] = rk808_rdev;
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}
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return 0;
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}
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static struct platform_driver rk808_regulator_driver = {
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.probe = rk808_regulator_probe,
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.driver = {
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.name = "rk808-regulator",
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.owner = THIS_MODULE,
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},
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};
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module_platform_driver(rk808_regulator_driver);
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MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
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MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
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MODULE_AUTHOR("Zhang Qing<zhanqging@rock-chips.com>");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:rk808-regulator");
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