382 lines
11 KiB
C
382 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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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/mfd/rk808.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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/* Field Definitions */
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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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/* Ramp rate definitions for buck1 / buck2 only */
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#define RK808_RAMP_RATE_OFFSET 3
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#define RK808_RAMP_RATE_MASK (3 << RK808_RAMP_RATE_OFFSET)
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#define RK808_RAMP_RATE_2MV_PER_US (0 << RK808_RAMP_RATE_OFFSET)
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#define RK808_RAMP_RATE_4MV_PER_US (1 << RK808_RAMP_RATE_OFFSET)
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#define RK808_RAMP_RATE_6MV_PER_US (2 << RK808_RAMP_RATE_OFFSET)
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#define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET)
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static const int rk808_buck_config_regs[] = {
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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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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 int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
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{
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unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
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unsigned int reg = rk808_buck_config_regs[rdev->desc->id -
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RK808_ID_DCDC1];
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switch (ramp_delay) {
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case 1 ... 2000:
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ramp_value = RK808_RAMP_RATE_2MV_PER_US;
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break;
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case 2001 ... 4000:
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ramp_value = RK808_RAMP_RATE_4MV_PER_US;
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break;
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case 4001 ... 6000:
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ramp_value = RK808_RAMP_RATE_6MV_PER_US;
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break;
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case 6001 ... 10000:
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break;
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default:
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pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
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rdev->desc->name, ramp_delay);
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}
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return regmap_update_bits(rdev->regmap, reg,
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RK808_RAMP_RATE_MASK, ramp_value);
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}
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static struct regulator_ops rk808_buck1_2_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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.set_ramp_delay = rk808_set_ramp_delay,
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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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.supply_name = "vcc1",
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.id = RK808_ID_DCDC1,
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.ops = &rk808_buck1_2_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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.supply_name = "vcc2",
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.id = RK808_ID_DCDC2,
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.ops = &rk808_buck1_2_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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.supply_name = "vcc3",
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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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.supply_name = "vcc4",
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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 = 16,
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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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.supply_name = "vcc6",
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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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.supply_name = "vcc6",
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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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.supply_name = "vcc7",
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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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.supply_name = "vcc9",
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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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.supply_name = "vcc9",
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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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.supply_name = "vcc10",
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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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.supply_name = "vcc7",
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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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.supply_name = "vcc11",
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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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.supply_name = "vcc8",
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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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.supply_name = "vcc12",
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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_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 i2c_client *client = rk808->i2c;
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struct device_node *reg_np;
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struct regulator_config config = {};
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struct regulator_dev *rk808_rdev;
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int ret, i;
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reg_np = of_get_child_by_name(client->dev.of_node, "regulators");
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if (!reg_np)
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return -ENXIO;
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ret = of_regulator_match(&pdev->dev, reg_np, rk808_reg_matches,
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RK808_NUM_REGULATORS);
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of_node_put(reg_np);
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if (ret < 0)
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return ret;
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/* Instantiate the regulators */
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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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config.dev = &client->dev;
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config.driver_data = rk808;
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config.regmap = rk808->regmap;
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config.of_node = rk808_reg_matches[i].of_node;
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config.init_data = rk808_reg_matches[i].init_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(&client->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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}
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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<zhangqing@rock-chips.com>");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:rk808-regulator");
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