| /* |
| * Regulator driver for Rockchip RK808 |
| * |
| * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd |
| * |
| * Author: Chris Zhong <zyw@rock-chips.com> |
| * Author: Zhang Qing <zhangqing@rock-chips.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/i2c.h> |
| #include <linux/mfd/rk808.h> |
| #include <linux/of_device.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/of_regulator.h> |
| |
| /* Field Definitions */ |
| #define RK808_BUCK_VSEL_MASK 0x3f |
| #define RK808_BUCK4_VSEL_MASK 0xf |
| #define RK808_LDO_VSEL_MASK 0x1f |
| |
| /* Ramp rate definitions for buck1 / buck2 only */ |
| #define RK808_RAMP_RATE_OFFSET 3 |
| #define RK808_RAMP_RATE_MASK (3 << RK808_RAMP_RATE_OFFSET) |
| #define RK808_RAMP_RATE_2MV_PER_US (0 << RK808_RAMP_RATE_OFFSET) |
| #define RK808_RAMP_RATE_4MV_PER_US (1 << RK808_RAMP_RATE_OFFSET) |
| #define RK808_RAMP_RATE_6MV_PER_US (2 << RK808_RAMP_RATE_OFFSET) |
| #define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET) |
| |
| /* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */ |
| #define RK808_SLP_REG_OFFSET 1 |
| |
| /* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */ |
| #define RK808_SLP_SET_OFF_REG_OFFSET 2 |
| |
| static const int rk808_buck_config_regs[] = { |
| RK808_BUCK1_CONFIG_REG, |
| RK808_BUCK2_CONFIG_REG, |
| RK808_BUCK3_CONFIG_REG, |
| RK808_BUCK4_CONFIG_REG, |
| }; |
| |
| static const struct regulator_linear_range rk808_buck_voltage_ranges[] = { |
| REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500), |
| }; |
| |
| static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = { |
| REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000), |
| }; |
| |
| static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = { |
| REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000), |
| }; |
| |
| static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = { |
| REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000), |
| REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0), |
| }; |
| |
| static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = { |
| REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000), |
| }; |
| |
| static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) |
| { |
| unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US; |
| unsigned int reg = rk808_buck_config_regs[rdev->desc->id - |
| RK808_ID_DCDC1]; |
| |
| switch (ramp_delay) { |
| case 1 ... 2000: |
| ramp_value = RK808_RAMP_RATE_2MV_PER_US; |
| break; |
| case 2001 ... 4000: |
| ramp_value = RK808_RAMP_RATE_4MV_PER_US; |
| break; |
| case 4001 ... 6000: |
| ramp_value = RK808_RAMP_RATE_6MV_PER_US; |
| break; |
| case 6001 ... 10000: |
| break; |
| default: |
| pr_warn("%s ramp_delay: %d not supported, setting 10000\n", |
| rdev->desc->name, ramp_delay); |
| } |
| |
| return regmap_update_bits(rdev->regmap, reg, |
| RK808_RAMP_RATE_MASK, ramp_value); |
| } |
| |
| static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv) |
| { |
| unsigned int reg; |
| int sel = regulator_map_voltage_linear_range(rdev, uv, uv); |
| |
| if (sel < 0) |
| return -EINVAL; |
| |
| reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET; |
| |
| return regmap_update_bits(rdev->regmap, reg, |
| rdev->desc->vsel_mask, |
| sel); |
| } |
| |
| static int rk808_set_suspend_enable(struct regulator_dev *rdev) |
| { |
| unsigned int reg; |
| |
| reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; |
| |
| return regmap_update_bits(rdev->regmap, reg, |
| rdev->desc->enable_mask, |
| 0); |
| } |
| |
| static int rk808_set_suspend_disable(struct regulator_dev *rdev) |
| { |
| unsigned int reg; |
| |
| reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET; |
| |
| return regmap_update_bits(rdev->regmap, reg, |
| rdev->desc->enable_mask, |
| rdev->desc->enable_mask); |
| } |
| |
| static struct regulator_ops rk808_buck1_2_ops = { |
| .list_voltage = regulator_list_voltage_linear_range, |
| .map_voltage = regulator_map_voltage_linear_range, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .set_ramp_delay = rk808_set_ramp_delay, |
| .set_suspend_voltage = rk808_set_suspend_voltage, |
| .set_suspend_enable = rk808_set_suspend_enable, |
| .set_suspend_disable = rk808_set_suspend_disable, |
| }; |
| |
| static struct regulator_ops rk808_reg_ops = { |
| .list_voltage = regulator_list_voltage_linear_range, |
| .map_voltage = regulator_map_voltage_linear_range, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .set_suspend_voltage = rk808_set_suspend_voltage, |
| .set_suspend_enable = rk808_set_suspend_enable, |
| .set_suspend_disable = rk808_set_suspend_disable, |
| }; |
| |
| static struct regulator_ops rk808_switch_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .set_suspend_enable = rk808_set_suspend_enable, |
| .set_suspend_disable = rk808_set_suspend_disable, |
| }; |
| |
| static const struct regulator_desc rk808_reg[] = { |
| { |
| .name = "DCDC_REG1", |
| .supply_name = "vcc1", |
| .id = RK808_ID_DCDC1, |
| .ops = &rk808_buck1_2_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 64, |
| .linear_ranges = rk808_buck_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges), |
| .vsel_reg = RK808_BUCK1_ON_VSEL_REG, |
| .vsel_mask = RK808_BUCK_VSEL_MASK, |
| .enable_reg = RK808_DCDC_EN_REG, |
| .enable_mask = BIT(0), |
| .owner = THIS_MODULE, |
| }, { |
| .name = "DCDC_REG2", |
| .supply_name = "vcc2", |
| .id = RK808_ID_DCDC2, |
| .ops = &rk808_buck1_2_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 64, |
| .linear_ranges = rk808_buck_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges), |
| .vsel_reg = RK808_BUCK2_ON_VSEL_REG, |
| .vsel_mask = RK808_BUCK_VSEL_MASK, |
| .enable_reg = RK808_DCDC_EN_REG, |
| .enable_mask = BIT(1), |
| .owner = THIS_MODULE, |
| }, { |
| .name = "DCDC_REG3", |
| .supply_name = "vcc3", |
| .id = RK808_ID_DCDC3, |
| .ops = &rk808_switch_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 1, |
| .enable_reg = RK808_DCDC_EN_REG, |
| .enable_mask = BIT(2), |
| .owner = THIS_MODULE, |
| }, { |
| .name = "DCDC_REG4", |
| .supply_name = "vcc4", |
| .id = RK808_ID_DCDC4, |
| .ops = &rk808_reg_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 16, |
| .linear_ranges = rk808_buck4_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges), |
| .vsel_reg = RK808_BUCK4_ON_VSEL_REG, |
| .vsel_mask = RK808_BUCK4_VSEL_MASK, |
| .enable_reg = RK808_DCDC_EN_REG, |
| .enable_mask = BIT(3), |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO_REG1", |
| .supply_name = "vcc6", |
| .id = RK808_ID_LDO1, |
| .ops = &rk808_reg_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 17, |
| .linear_ranges = rk808_ldo_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), |
| .vsel_reg = RK808_LDO1_ON_VSEL_REG, |
| .vsel_mask = RK808_LDO_VSEL_MASK, |
| .enable_reg = RK808_LDO_EN_REG, |
| .enable_mask = BIT(0), |
| .enable_time = 400, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO_REG2", |
| .supply_name = "vcc6", |
| .id = RK808_ID_LDO2, |
| .ops = &rk808_reg_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 17, |
| .linear_ranges = rk808_ldo_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), |
| .vsel_reg = RK808_LDO2_ON_VSEL_REG, |
| .vsel_mask = RK808_LDO_VSEL_MASK, |
| .enable_reg = RK808_LDO_EN_REG, |
| .enable_mask = BIT(1), |
| .enable_time = 400, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO_REG3", |
| .supply_name = "vcc7", |
| .id = RK808_ID_LDO3, |
| .ops = &rk808_reg_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 16, |
| .linear_ranges = rk808_ldo3_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges), |
| .vsel_reg = RK808_LDO3_ON_VSEL_REG, |
| .vsel_mask = RK808_BUCK4_VSEL_MASK, |
| .enable_reg = RK808_LDO_EN_REG, |
| .enable_mask = BIT(2), |
| .enable_time = 400, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO_REG4", |
| .supply_name = "vcc9", |
| .id = RK808_ID_LDO4, |
| .ops = &rk808_reg_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 17, |
| .linear_ranges = rk808_ldo_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), |
| .vsel_reg = RK808_LDO4_ON_VSEL_REG, |
| .vsel_mask = RK808_LDO_VSEL_MASK, |
| .enable_reg = RK808_LDO_EN_REG, |
| .enable_mask = BIT(3), |
| .enable_time = 400, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO_REG5", |
| .supply_name = "vcc9", |
| .id = RK808_ID_LDO5, |
| .ops = &rk808_reg_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 17, |
| .linear_ranges = rk808_ldo_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), |
| .vsel_reg = RK808_LDO5_ON_VSEL_REG, |
| .vsel_mask = RK808_LDO_VSEL_MASK, |
| .enable_reg = RK808_LDO_EN_REG, |
| .enable_mask = BIT(4), |
| .enable_time = 400, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO_REG6", |
| .supply_name = "vcc10", |
| .id = RK808_ID_LDO6, |
| .ops = &rk808_reg_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 18, |
| .linear_ranges = rk808_ldo6_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges), |
| .vsel_reg = RK808_LDO6_ON_VSEL_REG, |
| .vsel_mask = RK808_LDO_VSEL_MASK, |
| .enable_reg = RK808_LDO_EN_REG, |
| .enable_mask = BIT(5), |
| .enable_time = 400, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO_REG7", |
| .supply_name = "vcc7", |
| .id = RK808_ID_LDO7, |
| .ops = &rk808_reg_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 18, |
| .linear_ranges = rk808_ldo6_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges), |
| .vsel_reg = RK808_LDO7_ON_VSEL_REG, |
| .vsel_mask = RK808_LDO_VSEL_MASK, |
| .enable_reg = RK808_LDO_EN_REG, |
| .enable_mask = BIT(6), |
| .enable_time = 400, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "LDO_REG8", |
| .supply_name = "vcc11", |
| .id = RK808_ID_LDO8, |
| .ops = &rk808_reg_ops, |
| .type = REGULATOR_VOLTAGE, |
| .n_voltages = 17, |
| .linear_ranges = rk808_ldo_voltage_ranges, |
| .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), |
| .vsel_reg = RK808_LDO8_ON_VSEL_REG, |
| .vsel_mask = RK808_LDO_VSEL_MASK, |
| .enable_reg = RK808_LDO_EN_REG, |
| .enable_mask = BIT(7), |
| .enable_time = 400, |
| .owner = THIS_MODULE, |
| }, { |
| .name = "SWITCH_REG1", |
| .supply_name = "vcc8", |
| .id = RK808_ID_SWITCH1, |
| .ops = &rk808_switch_ops, |
| .type = REGULATOR_VOLTAGE, |
| .enable_reg = RK808_DCDC_EN_REG, |
| .enable_mask = BIT(5), |
| .owner = THIS_MODULE, |
| }, { |
| .name = "SWITCH_REG2", |
| .supply_name = "vcc12", |
| .id = RK808_ID_SWITCH2, |
| .ops = &rk808_switch_ops, |
| .type = REGULATOR_VOLTAGE, |
| .enable_reg = RK808_DCDC_EN_REG, |
| .enable_mask = BIT(6), |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static struct of_regulator_match rk808_reg_matches[] = { |
| [RK808_ID_DCDC1] = { .name = "DCDC_REG1" }, |
| [RK808_ID_DCDC2] = { .name = "DCDC_REG2" }, |
| [RK808_ID_DCDC3] = { .name = "DCDC_REG3" }, |
| [RK808_ID_DCDC4] = { .name = "DCDC_REG4" }, |
| [RK808_ID_LDO1] = { .name = "LDO_REG1" }, |
| [RK808_ID_LDO2] = { .name = "LDO_REG2" }, |
| [RK808_ID_LDO3] = { .name = "LDO_REG3" }, |
| [RK808_ID_LDO4] = { .name = "LDO_REG4" }, |
| [RK808_ID_LDO5] = { .name = "LDO_REG5" }, |
| [RK808_ID_LDO6] = { .name = "LDO_REG6" }, |
| [RK808_ID_LDO7] = { .name = "LDO_REG7" }, |
| [RK808_ID_LDO8] = { .name = "LDO_REG8" }, |
| [RK808_ID_SWITCH1] = { .name = "SWITCH_REG1" }, |
| [RK808_ID_SWITCH2] = { .name = "SWITCH_REG2" }, |
| }; |
| |
| static int rk808_regulator_probe(struct platform_device *pdev) |
| { |
| struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent); |
| struct i2c_client *client = rk808->i2c; |
| struct device_node *reg_np; |
| struct regulator_config config = {}; |
| struct regulator_dev *rk808_rdev; |
| int ret, i; |
| |
| reg_np = of_get_child_by_name(client->dev.of_node, "regulators"); |
| if (!reg_np) |
| return -ENXIO; |
| |
| ret = of_regulator_match(&pdev->dev, reg_np, rk808_reg_matches, |
| RK808_NUM_REGULATORS); |
| of_node_put(reg_np); |
| if (ret < 0) |
| return ret; |
| |
| /* Instantiate the regulators */ |
| for (i = 0; i < RK808_NUM_REGULATORS; i++) { |
| if (!rk808_reg_matches[i].init_data || |
| !rk808_reg_matches[i].of_node) |
| continue; |
| |
| config.dev = &client->dev; |
| config.driver_data = rk808; |
| config.regmap = rk808->regmap; |
| config.of_node = rk808_reg_matches[i].of_node; |
| config.init_data = rk808_reg_matches[i].init_data; |
| |
| rk808_rdev = devm_regulator_register(&pdev->dev, |
| &rk808_reg[i], &config); |
| if (IS_ERR(rk808_rdev)) { |
| dev_err(&client->dev, |
| "failed to register %d regulator\n", i); |
| return PTR_ERR(rk808_rdev); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static struct platform_driver rk808_regulator_driver = { |
| .probe = rk808_regulator_probe, |
| .driver = { |
| .name = "rk808-regulator", |
| }, |
| }; |
| |
| module_platform_driver(rk808_regulator_driver); |
| |
| MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs"); |
| MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>"); |
| MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:rk808-regulator"); |
