/* * 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 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");