| /* |
| * Copyright (c) 2013 Samsung Electronics Co., Ltd |
| * http://www.samsung.com |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| */ |
| |
| #include <linux/bug.h> |
| #include <linux/err.h> |
| #include <linux/gpio.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/regmap.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/regulator/of_regulator.h> |
| #include <linux/mfd/samsung/core.h> |
| #include <linux/mfd/samsung/s2mpa01.h> |
| |
| #define S2MPA01_REGULATOR_CNT ARRAY_SIZE(regulators) |
| |
| struct s2mpa01_info { |
| int ramp_delay24; |
| int ramp_delay3; |
| int ramp_delay5; |
| int ramp_delay16; |
| int ramp_delay7; |
| int ramp_delay8910; |
| }; |
| |
| static int get_ramp_delay(int ramp_delay) |
| { |
| unsigned char cnt = 0; |
| |
| ramp_delay /= 6250; |
| |
| while (true) { |
| ramp_delay = ramp_delay >> 1; |
| if (ramp_delay == 0) |
| break; |
| cnt++; |
| } |
| |
| if (cnt > 3) |
| cnt = 3; |
| |
| return cnt; |
| } |
| |
| static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev, |
| unsigned int old_selector, |
| unsigned int new_selector) |
| { |
| struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev); |
| unsigned int ramp_delay = 0; |
| int old_volt, new_volt; |
| |
| switch (rdev_get_id(rdev)) { |
| case S2MPA01_BUCK2: |
| case S2MPA01_BUCK4: |
| ramp_delay = s2mpa01->ramp_delay24; |
| break; |
| case S2MPA01_BUCK3: |
| ramp_delay = s2mpa01->ramp_delay3; |
| break; |
| case S2MPA01_BUCK5: |
| ramp_delay = s2mpa01->ramp_delay5; |
| break; |
| case S2MPA01_BUCK1: |
| case S2MPA01_BUCK6: |
| ramp_delay = s2mpa01->ramp_delay16; |
| break; |
| case S2MPA01_BUCK7: |
| ramp_delay = s2mpa01->ramp_delay7; |
| break; |
| case S2MPA01_BUCK8: |
| case S2MPA01_BUCK9: |
| case S2MPA01_BUCK10: |
| ramp_delay = s2mpa01->ramp_delay8910; |
| break; |
| } |
| |
| if (ramp_delay == 0) |
| ramp_delay = rdev->desc->ramp_delay; |
| |
| old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector); |
| new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector); |
| |
| return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay); |
| } |
| |
| static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) |
| { |
| struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev); |
| unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2; |
| unsigned int ramp_enable = 1, enable_shift = 0; |
| int ret; |
| |
| switch (rdev_get_id(rdev)) { |
| case S2MPA01_BUCK1: |
| enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT; |
| if (!ramp_delay) { |
| ramp_enable = 0; |
| break; |
| } |
| |
| if (ramp_delay > s2mpa01->ramp_delay16) |
| s2mpa01->ramp_delay16 = ramp_delay; |
| else |
| ramp_delay = s2mpa01->ramp_delay16; |
| |
| ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT; |
| break; |
| case S2MPA01_BUCK2: |
| enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT; |
| if (!ramp_delay) { |
| ramp_enable = 0; |
| break; |
| } |
| |
| if (ramp_delay > s2mpa01->ramp_delay24) |
| s2mpa01->ramp_delay24 = ramp_delay; |
| else |
| ramp_delay = s2mpa01->ramp_delay24; |
| |
| ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT; |
| ramp_reg = S2MPA01_REG_RAMP1; |
| break; |
| case S2MPA01_BUCK3: |
| enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT; |
| if (!ramp_delay) { |
| ramp_enable = 0; |
| break; |
| } |
| |
| s2mpa01->ramp_delay3 = ramp_delay; |
| ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT; |
| ramp_reg = S2MPA01_REG_RAMP1; |
| break; |
| case S2MPA01_BUCK4: |
| enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT; |
| if (!ramp_delay) { |
| ramp_enable = 0; |
| break; |
| } |
| |
| if (ramp_delay > s2mpa01->ramp_delay24) |
| s2mpa01->ramp_delay24 = ramp_delay; |
| else |
| ramp_delay = s2mpa01->ramp_delay24; |
| |
| ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT; |
| ramp_reg = S2MPA01_REG_RAMP1; |
| break; |
| case S2MPA01_BUCK5: |
| s2mpa01->ramp_delay5 = ramp_delay; |
| ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT; |
| break; |
| case S2MPA01_BUCK6: |
| if (ramp_delay > s2mpa01->ramp_delay16) |
| s2mpa01->ramp_delay16 = ramp_delay; |
| else |
| ramp_delay = s2mpa01->ramp_delay16; |
| |
| ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT; |
| break; |
| case S2MPA01_BUCK7: |
| s2mpa01->ramp_delay7 = ramp_delay; |
| ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT; |
| break; |
| case S2MPA01_BUCK8: |
| case S2MPA01_BUCK9: |
| case S2MPA01_BUCK10: |
| if (ramp_delay > s2mpa01->ramp_delay8910) |
| s2mpa01->ramp_delay8910 = ramp_delay; |
| else |
| ramp_delay = s2mpa01->ramp_delay8910; |
| |
| ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT; |
| break; |
| default: |
| return 0; |
| } |
| |
| if (!ramp_enable) |
| goto ramp_disable; |
| |
| /* Ramp delay can be enabled/disabled only for buck[1234] */ |
| if (rdev_get_id(rdev) >= S2MPA01_BUCK1 && |
| rdev_get_id(rdev) <= S2MPA01_BUCK4) { |
| ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, |
| 1 << enable_shift, 1 << enable_shift); |
| if (ret) { |
| dev_err(&rdev->dev, "failed to enable ramp rate\n"); |
| return ret; |
| } |
| } |
| |
| ramp_val = get_ramp_delay(ramp_delay); |
| |
| return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift, |
| ramp_val << ramp_shift); |
| |
| ramp_disable: |
| return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1, |
| 1 << enable_shift, 0); |
| } |
| |
| static struct regulator_ops s2mpa01_ldo_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| .map_voltage = regulator_map_voltage_linear, |
| .is_enabled = regulator_is_enabled_regmap, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .set_voltage_time_sel = regulator_set_voltage_time_sel, |
| }; |
| |
| static struct regulator_ops s2mpa01_buck_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| .map_voltage = regulator_map_voltage_linear, |
| .is_enabled = regulator_is_enabled_regmap, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel, |
| .set_ramp_delay = s2mpa01_set_ramp_delay, |
| }; |
| |
| #define regulator_desc_ldo(num, step) { \ |
| .name = "LDO"#num, \ |
| .id = S2MPA01_LDO##num, \ |
| .ops = &s2mpa01_ldo_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = MIN_800_MV, \ |
| .uV_step = step, \ |
| .n_voltages = S2MPA01_LDO_N_VOLTAGES, \ |
| .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \ |
| .vsel_mask = S2MPA01_LDO_VSEL_MASK, \ |
| .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \ |
| .enable_mask = S2MPA01_ENABLE_MASK \ |
| } |
| |
| #define regulator_desc_buck1_4(num) { \ |
| .name = "BUCK"#num, \ |
| .id = S2MPA01_BUCK##num, \ |
| .ops = &s2mpa01_buck_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = MIN_600_MV, \ |
| .uV_step = STEP_6_25_MV, \ |
| .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
| .ramp_delay = S2MPA01_RAMP_DELAY, \ |
| .vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \ |
| .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ |
| .enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \ |
| .enable_mask = S2MPA01_ENABLE_MASK \ |
| } |
| |
| #define regulator_desc_buck5 { \ |
| .name = "BUCK5", \ |
| .id = S2MPA01_BUCK5, \ |
| .ops = &s2mpa01_buck_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = MIN_800_MV, \ |
| .uV_step = STEP_6_25_MV, \ |
| .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
| .ramp_delay = S2MPA01_RAMP_DELAY, \ |
| .vsel_reg = S2MPA01_REG_B5CTRL2, \ |
| .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ |
| .enable_reg = S2MPA01_REG_B5CTRL1, \ |
| .enable_mask = S2MPA01_ENABLE_MASK \ |
| } |
| |
| #define regulator_desc_buck6_10(num, min, step) { \ |
| .name = "BUCK"#num, \ |
| .id = S2MPA01_BUCK##num, \ |
| .ops = &s2mpa01_buck_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = min, \ |
| .uV_step = step, \ |
| .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \ |
| .ramp_delay = S2MPA01_RAMP_DELAY, \ |
| .vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \ |
| .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \ |
| .enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \ |
| .enable_mask = S2MPA01_ENABLE_MASK \ |
| } |
| |
| static const struct regulator_desc regulators[] = { |
| regulator_desc_ldo(1, STEP_25_MV), |
| regulator_desc_ldo(2, STEP_50_MV), |
| regulator_desc_ldo(3, STEP_50_MV), |
| regulator_desc_ldo(4, STEP_50_MV), |
| regulator_desc_ldo(5, STEP_50_MV), |
| regulator_desc_ldo(6, STEP_25_MV), |
| regulator_desc_ldo(7, STEP_50_MV), |
| regulator_desc_ldo(8, STEP_50_MV), |
| regulator_desc_ldo(9, STEP_50_MV), |
| regulator_desc_ldo(10, STEP_50_MV), |
| regulator_desc_ldo(11, STEP_25_MV), |
| regulator_desc_ldo(12, STEP_50_MV), |
| regulator_desc_ldo(13, STEP_50_MV), |
| regulator_desc_ldo(14, STEP_50_MV), |
| regulator_desc_ldo(15, STEP_50_MV), |
| regulator_desc_ldo(16, STEP_50_MV), |
| regulator_desc_ldo(17, STEP_50_MV), |
| regulator_desc_ldo(18, STEP_50_MV), |
| regulator_desc_ldo(19, STEP_50_MV), |
| regulator_desc_ldo(20, STEP_50_MV), |
| regulator_desc_ldo(21, STEP_50_MV), |
| regulator_desc_ldo(22, STEP_25_MV), |
| regulator_desc_ldo(23, STEP_25_MV), |
| regulator_desc_ldo(24, STEP_50_MV), |
| regulator_desc_ldo(25, STEP_50_MV), |
| regulator_desc_ldo(26, STEP_50_MV), |
| regulator_desc_buck1_4(1), |
| regulator_desc_buck1_4(2), |
| regulator_desc_buck1_4(3), |
| regulator_desc_buck1_4(4), |
| regulator_desc_buck5, |
| regulator_desc_buck6_10(6, MIN_600_MV, STEP_6_25_MV), |
| regulator_desc_buck6_10(7, MIN_600_MV, STEP_6_25_MV), |
| regulator_desc_buck6_10(8, MIN_800_MV, STEP_12_5_MV), |
| regulator_desc_buck6_10(9, MIN_1500_MV, STEP_12_5_MV), |
| regulator_desc_buck6_10(10, MIN_1000_MV, STEP_12_5_MV), |
| }; |
| |
| static int s2mpa01_pmic_probe(struct platform_device *pdev) |
| { |
| struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
| struct sec_platform_data *pdata = dev_get_platdata(iodev->dev); |
| struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX] = { }; |
| struct device_node *reg_np = NULL; |
| struct regulator_config config = { }; |
| struct s2mpa01_info *s2mpa01; |
| int i; |
| |
| s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL); |
| if (!s2mpa01) |
| return -ENOMEM; |
| |
| for (i = 0; i < S2MPA01_REGULATOR_CNT; i++) |
| rdata[i].name = regulators[i].name; |
| |
| if (iodev->dev->of_node) { |
| reg_np = of_get_child_by_name(iodev->dev->of_node, |
| "regulators"); |
| if (!reg_np) { |
| dev_err(&pdev->dev, |
| "could not find regulators sub-node\n"); |
| return -EINVAL; |
| } |
| |
| of_regulator_match(&pdev->dev, reg_np, rdata, |
| S2MPA01_REGULATOR_MAX); |
| of_node_put(reg_np); |
| } |
| |
| platform_set_drvdata(pdev, s2mpa01); |
| |
| config.dev = &pdev->dev; |
| config.regmap = iodev->regmap_pmic; |
| config.driver_data = s2mpa01; |
| |
| for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) { |
| struct regulator_dev *rdev; |
| if (pdata) |
| config.init_data = pdata->regulators[i].initdata; |
| else |
| config.init_data = rdata[i].init_data; |
| |
| if (reg_np) |
| config.of_node = rdata[i].of_node; |
| |
| rdev = devm_regulator_register(&pdev->dev, |
| ®ulators[i], &config); |
| if (IS_ERR(rdev)) { |
| dev_err(&pdev->dev, "regulator init failed for %d\n", |
| i); |
| return PTR_ERR(rdev); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const struct platform_device_id s2mpa01_pmic_id[] = { |
| { "s2mpa01-pmic", 0}, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id); |
| |
| static struct platform_driver s2mpa01_pmic_driver = { |
| .driver = { |
| .name = "s2mpa01-pmic", |
| .owner = THIS_MODULE, |
| }, |
| .probe = s2mpa01_pmic_probe, |
| .id_table = s2mpa01_pmic_id, |
| }; |
| |
| module_platform_driver(s2mpa01_pmic_driver); |
| |
| /* Module information */ |
| MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); |
| MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>"); |
| MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver"); |
| MODULE_LICENSE("GPL"); |