/* * Regulators driver for Marvell 88PM8607 * * Copyright (C) 2009 Marvell International Ltd. * Haojian Zhuang <haojian.zhuang@marvell.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/mfd/88pm860x.h> struct pm8607_regulator_info { struct regulator_desc desc; struct pm860x_chip *chip; struct regulator_dev *regulator; struct i2c_client *i2c; int min_uV; int max_uV; int step_uV; int vol_reg; int vol_shift; int vol_nbits; int update_reg; int update_bit; int enable_reg; int enable_bit; int slope_double; }; static inline int check_range(struct pm8607_regulator_info *info, int min_uV, int max_uV) { if (max_uV < info->min_uV || min_uV > info->max_uV || min_uV > max_uV) return -EINVAL; return 0; } static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index) { struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); int ret = -EINVAL; switch (info->desc.id) { case PM8607_ID_BUCK1: ret = (index < 0x1d) ? (index * 25000 + 800000) : ((index < 0x20) ? 1500000 : ((index < 0x40) ? ((index - 0x20) * 25000) : -EINVAL)); break; case PM8607_ID_BUCK3: ret = (index < 0x3d) ? (index * 25000) : ((index < 0x40) ? 1500000 : -EINVAL); if (ret < 0) break; if (info->slope_double) ret <<= 1; break; case PM8607_ID_LDO1: ret = (index == 0) ? 1800000 : ((index == 1) ? 1200000 : ((index == 2) ? 2800000 : -EINVAL)); break; case PM8607_ID_LDO5: ret = (index == 0) ? 2900000 : ((index == 1) ? 3000000 : ((index == 2) ? 3100000 : 3300000)); break; case PM8607_ID_LDO7: case PM8607_ID_LDO8: ret = (index < 3) ? (index * 50000 + 1800000) : ((index < 8) ? (index * 50000 + 2550000) : -EINVAL); break; case PM8607_ID_LDO12: ret = (index < 2) ? (index * 100000 + 1800000) : ((index < 7) ? (index * 100000 + 2500000) : ((index == 7) ? 3300000 : 1200000)); break; case PM8607_ID_LDO2: case PM8607_ID_LDO3: case PM8607_ID_LDO9: ret = (index < 3) ? (index * 50000 + 1800000) : ((index < 7) ? (index * 50000 + 2550000) : 3300000); break; case PM8607_ID_LDO4: ret = (index < 3) ? (index * 50000 + 1800000) : ((index < 6) ? (index * 50000 + 2550000) : ((index == 6) ? 2900000 : 3300000)); break; case PM8607_ID_LDO6: ret = (index < 2) ? (index * 50000 + 1800000) : ((index < 7) ? (index * 50000 + 2500000) : 3300000); break; case PM8607_ID_LDO10: ret = (index < 3) ? (index * 50000 + 1800000) : ((index < 7) ? (index * 50000 + 2550000) : ((index == 7) ? 3300000 : 1200000)); break; case PM8607_ID_LDO14: ret = (index < 2) ? (index * 50000 + 1800000) : ((index < 7) ? (index * 50000 + 2600000) : 3300000); break; } return ret; } static int choose_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); int val = -ENOENT; int ret; switch (info->desc.id) { case PM8607_ID_BUCK1: if (min_uV >= 800000) /* 800mV ~ 1500mV / 25mV */ val = (min_uV - 775001) / 25000; else { /* 25mV ~ 775mV / 25mV */ val = (min_uV + 249999) / 25000; val += 32; } break; case PM8607_ID_BUCK3: if (info->slope_double) min_uV = min_uV >> 1; val = (min_uV + 249999) / 25000; /* 0mV ~ 1500mV / 25mV */ break; case PM8607_ID_LDO1: if (min_uV > 1800000) val = 2; else if (min_uV > 1200000) val = 0; else val = 1; break; case PM8607_ID_LDO5: if (min_uV > 3100000) val = 3; else /* 2900mV ~ 3100mV / 100mV */ val = (min_uV - 2800001) / 100000; break; case PM8607_ID_LDO7: case PM8607_ID_LDO8: if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 50mV */ if (min_uV <= 1800000) val = 0; /* 1800mv */ else if (min_uV <= 1900000) val = (min_uV - 1750001) / 50000; else val = 3; /* 2700mV */ } else { /* 2700mV ~ 2900mV / 50mV */ if (min_uV <= 2900000) { val = (min_uV - 2650001) / 50000; val += 3; } else val = -EINVAL; } break; case PM8607_ID_LDO10: if (min_uV > 2850000) val = 7; else if (min_uV <= 1200000) val = 8; else if (min_uV < 2700000) /* 1800mV ~ 1900mV / 50mV */ val = (min_uV - 1750001) / 50000; else { /* 2700mV ~ 2850mV / 50mV */ val = (min_uV - 2650001) / 50000; val += 3; } break; case PM8607_ID_LDO12: if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 100mV */ if (min_uV <= 1200000) val = 8; /* 1200mV */ else if (min_uV <= 1800000) val = 0; /* 1800mV */ else if (min_uV <= 1900000) val = (min_uV - 1700001) / 100000; else val = 2; /* 2700mV */ } else { /* 2700mV ~ 3100mV / 100mV */ if (min_uV <= 3100000) { val = (min_uV - 2600001) / 100000; val += 2; } else if (min_uV <= 3300000) val = 7; else val = -EINVAL; } break; case PM8607_ID_LDO2: case PM8607_ID_LDO3: case PM8607_ID_LDO9: if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 50mV */ if (min_uV <= 1800000) val = 0; else if (min_uV <= 1900000) val = (min_uV - 1750001) / 50000; else val = 3; /* 2700mV */ } else { /* 2700mV ~ 2850mV / 50mV */ if (min_uV <= 2850000) { val = (min_uV - 2650001) / 50000; val += 3; } else if (min_uV <= 3300000) val = 7; else val = -EINVAL; } break; case PM8607_ID_LDO4: if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 50mV */ if (min_uV <= 1800000) val = 0; else if (min_uV <= 1900000) val = (min_uV - 1750001) / 50000; else val = 3; /* 2700mV */ } else { /* 2700mV ~ 2800mV / 50mV */ if (min_uV <= 2850000) { val = (min_uV - 2650001) / 50000; val += 3; } else if (min_uV <= 2900000) val = 6; else if (min_uV <= 3300000) val = 7; else val = -EINVAL; } break; case PM8607_ID_LDO6: if (min_uV < 2600000) { /* 1800mV ~ 1850mV / 50mV */ if (min_uV <= 1800000) val = 0; else if (min_uV <= 1850000) val = (min_uV - 1750001) / 50000; else val = 2; /* 2600mV */ } else { /* 2600mV ~ 2800mV / 50mV */ if (min_uV <= 2800000) { val = (min_uV - 2550001) / 50000; val += 2; } else if (min_uV <= 3300000) val = 7; else val = -EINVAL; } break; case PM8607_ID_LDO14: if (min_uV < 2700000) { /* 1800mV ~ 1850mV / 50mV */ if (min_uV <= 1800000) val = 0; else if (min_uV <= 1850000) val = (min_uV - 1750001) / 50000; else val = 2; /* 2700mV */ } else { /* 2700mV ~ 2900mV / 50mV */ if (min_uV <= 2900000) { val = (min_uV - 2650001) / 50000; val += 2; } else if (min_uV <= 3300000) val = 7; else val = -EINVAL; } break; } if (val >= 0) { ret = pm8607_list_voltage(rdev, val); if (ret > max_uV) { pr_err("exceed voltage range (%d %d) uV", min_uV, max_uV); return -EINVAL; } } else pr_err("invalid voltage range (%d %d) uV", min_uV, max_uV); return val; } static int pm8607_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); uint8_t val, mask; int ret; if (check_range(info, min_uV, max_uV)) { pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV); return -EINVAL; } ret = choose_voltage(rdev, min_uV, max_uV); if (ret < 0) return -EINVAL; val = (uint8_t)(ret << info->vol_shift); mask = ((1 << info->vol_nbits) - 1) << info->vol_shift; ret = pm860x_set_bits(info->i2c, info->vol_reg, mask, val); if (ret) return ret; switch (info->desc.id) { case PM8607_ID_BUCK1: case PM8607_ID_BUCK3: ret = pm860x_set_bits(info->i2c, info->update_reg, 1 << info->update_bit, 1 << info->update_bit); break; } return ret; } static int pm8607_get_voltage(struct regulator_dev *rdev) { struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); uint8_t val, mask; int ret; ret = pm860x_reg_read(info->i2c, info->vol_reg); if (ret < 0) return ret; mask = ((1 << info->vol_nbits) - 1) << info->vol_shift; val = ((unsigned char)ret & mask) >> info->vol_shift; return pm8607_list_voltage(rdev, val); } static int pm8607_enable(struct regulator_dev *rdev) { struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); return pm860x_set_bits(info->i2c, info->enable_reg, 1 << info->enable_bit, 1 << info->enable_bit); } static int pm8607_disable(struct regulator_dev *rdev) { struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); return pm860x_set_bits(info->i2c, info->enable_reg, 1 << info->enable_bit, 0); } static int pm8607_is_enabled(struct regulator_dev *rdev) { struct pm8607_regulator_info *info = rdev_get_drvdata(rdev); int ret; ret = pm860x_reg_read(info->i2c, info->enable_reg); if (ret < 0) return ret; return !!((unsigned char)ret & (1 << info->enable_bit)); } static struct regulator_ops pm8607_regulator_ops = { .set_voltage = pm8607_set_voltage, .get_voltage = pm8607_get_voltage, .enable = pm8607_enable, .disable = pm8607_disable, .is_enabled = pm8607_is_enabled, }; #define PM8607_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \ { \ .desc = { \ .name = "BUCK" #_id, \ .ops = &pm8607_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = PM8607_ID_BUCK##_id, \ .owner = THIS_MODULE, \ }, \ .min_uV = (min) * 1000, \ .max_uV = (max) * 1000, \ .step_uV = (step) * 1000, \ .vol_reg = PM8607_##vreg, \ .vol_shift = (0), \ .vol_nbits = (nbits), \ .update_reg = PM8607_##ureg, \ .update_bit = (ubit), \ .enable_reg = PM8607_##ereg, \ .enable_bit = (ebit), \ .slope_double = (0), \ } #define PM8607_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \ { \ .desc = { \ .name = "LDO" #_id, \ .ops = &pm8607_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = PM8607_ID_LDO##_id, \ .owner = THIS_MODULE, \ }, \ .min_uV = (min) * 1000, \ .max_uV = (max) * 1000, \ .step_uV = (step) * 1000, \ .vol_reg = PM8607_##vreg, \ .vol_shift = (shift), \ .vol_nbits = (nbits), \ .enable_reg = PM8607_##ereg, \ .enable_bit = (ebit), \ .slope_double = (0), \ } static struct pm8607_regulator_info pm8607_regulator_info[] = { PM8607_DVC(1, 0, 1500, 25, BUCK1, 6, GO, 0, SUPPLIES_EN11, 0), PM8607_DVC(3, 0, 1500, 25, BUCK3, 6, GO, 2, SUPPLIES_EN11, 2), PM8607_LDO(1 , 1200, 2800, 0, LDO1 , 0, 2, SUPPLIES_EN11, 3), PM8607_LDO(2 , 1800, 3300, 0, LDO2 , 0, 3, SUPPLIES_EN11, 4), PM8607_LDO(3 , 1800, 3300, 0, LDO3 , 0, 3, SUPPLIES_EN11, 5), PM8607_LDO(4 , 1800, 3300, 0, LDO4 , 0, 3, SUPPLIES_EN11, 6), PM8607_LDO(5 , 2900, 3300, 0, LDO5 , 0, 2, SUPPLIES_EN11, 7), PM8607_LDO(6 , 1800, 3300, 0, LDO6 , 0, 3, SUPPLIES_EN12, 0), PM8607_LDO(7 , 1800, 2900, 0, LDO7 , 0, 3, SUPPLIES_EN12, 1), PM8607_LDO(8 , 1800, 2900, 0, LDO8 , 0, 3, SUPPLIES_EN12, 2), PM8607_LDO(9 , 1800, 3300, 0, LDO9 , 0, 3, SUPPLIES_EN12, 3), PM8607_LDO(10, 1200, 3300, 0, LDO10, 0, 4, SUPPLIES_EN11, 4), PM8607_LDO(12, 1200, 3300, 0, LDO12, 0, 4, SUPPLIES_EN11, 5), PM8607_LDO(14, 1800, 3300, 0, LDO14, 0, 3, SUPPLIES_EN11, 6), }; static inline struct pm8607_regulator_info *find_regulator_info(int id) { struct pm8607_regulator_info *info; int i; for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) { info = &pm8607_regulator_info[i]; if (info->desc.id == id) return info; } return NULL; } static int __devinit pm8607_regulator_probe(struct platform_device *pdev) { struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); struct pm860x_platform_data *pdata = chip->dev->platform_data; struct pm8607_regulator_info *info = NULL; info = find_regulator_info(pdev->id); if (info == NULL) { dev_err(&pdev->dev, "invalid regulator ID specified\n"); return -EINVAL; } info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion; info->chip = chip; info->regulator = regulator_register(&info->desc, &pdev->dev, pdata->regulator[pdev->id], info); if (IS_ERR(info->regulator)) { dev_err(&pdev->dev, "failed to register regulator %s\n", info->desc.name); return PTR_ERR(info->regulator); } /* check DVC ramp slope double */ if (info->desc.id == PM8607_ID_BUCK3) if (info->chip->buck3_double) info->slope_double = 1; platform_set_drvdata(pdev, info); return 0; } static int __devexit pm8607_regulator_remove(struct platform_device *pdev) { struct pm8607_regulator_info *info = platform_get_drvdata(pdev); regulator_unregister(info->regulator); return 0; } #define PM8607_REGULATOR_DRIVER(_name) \ { \ .driver = { \ .name = "88pm8607-" #_name, \ .owner = THIS_MODULE, \ }, \ .probe = pm8607_regulator_probe, \ .remove = __devexit_p(pm8607_regulator_remove), \ } static struct platform_driver pm8607_regulator_driver[] = { PM8607_REGULATOR_DRIVER(buck1), PM8607_REGULATOR_DRIVER(buck2), PM8607_REGULATOR_DRIVER(buck3), PM8607_REGULATOR_DRIVER(ldo1), PM8607_REGULATOR_DRIVER(ldo2), PM8607_REGULATOR_DRIVER(ldo3), PM8607_REGULATOR_DRIVER(ldo4), PM8607_REGULATOR_DRIVER(ldo5), PM8607_REGULATOR_DRIVER(ldo6), PM8607_REGULATOR_DRIVER(ldo7), PM8607_REGULATOR_DRIVER(ldo8), PM8607_REGULATOR_DRIVER(ldo9), PM8607_REGULATOR_DRIVER(ldo10), PM8607_REGULATOR_DRIVER(ldo12), PM8607_REGULATOR_DRIVER(ldo14), }; static int __init pm8607_regulator_init(void) { int i, count, ret; count = ARRAY_SIZE(pm8607_regulator_driver); for (i = 0; i < count; i++) { ret = platform_driver_register(&pm8607_regulator_driver[i]); if (ret != 0) pr_err("Failed to register regulator driver: %d\n", ret); } return 0; } subsys_initcall(pm8607_regulator_init); static void __exit pm8607_regulator_exit(void) { int i, count; count = ARRAY_SIZE(pm8607_regulator_driver); for (i = 0; i < count; i++) platform_driver_unregister(&pm8607_regulator_driver[i]); } module_exit(pm8607_regulator_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC"); MODULE_ALIAS("platform:88pm8607-regulator");