/* * tps65912.c -- TI tps65912 * * Copyright 2011 Texas Instruments Inc. * * Author: Margarita Olaya Cabrera * * 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. * * This driver is based on wm8350 implementation. */ #include #include #include #include #include #include #include #include #include #include #include /* DCDC's */ #define TPS65912_REG_DCDC1 0 #define TPS65912_REG_DCDC2 1 #define TPS65912_REG_DCDC3 2 #define TPS65912_REG_DCDC4 3 /* LDOs */ #define TPS65912_REG_LDO1 4 #define TPS65912_REG_LDO2 5 #define TPS65912_REG_LDO3 6 #define TPS65912_REG_LDO4 7 #define TPS65912_REG_LDO5 8 #define TPS65912_REG_LDO6 9 #define TPS65912_REG_LDO7 10 #define TPS65912_REG_LDO8 11 #define TPS65912_REG_LDO9 12 #define TPS65912_REG_LDO10 13 #define TPS65912_MAX_REG_ID TPS65912_REG_LDO_10 /* Number of step-down converters available */ #define TPS65912_NUM_DCDC 4 /* Number of LDO voltage regulators available */ #define TPS65912_NUM_LDO 10 /* Number of total regulators available */ #define TPS65912_NUM_REGULATOR (TPS65912_NUM_DCDC + TPS65912_NUM_LDO) #define TPS65912_REG_ENABLED 0x80 #define OP_SELREG_MASK 0x40 #define OP_SELREG_SHIFT 6 struct tps_info { const char *name; }; static struct tps_info tps65912_regs[] = { { .name = "DCDC1", }, { .name = "DCDC2", }, { .name = "DCDC3", }, { .name = "DCDC4", }, { .name = "LDO1", }, { .name = "LDO2", }, { .name = "LDO3", }, { .name = "LDO4", }, { .name = "LDO5", }, { .name = "LDO6", }, { .name = "LDO7", }, { .name = "LDO8", }, { .name = "LDO9", }, { .name = "LDO10", }, }; struct tps65912_reg { struct regulator_desc desc[TPS65912_NUM_REGULATOR]; struct tps65912 *mfd; struct regulator_dev *rdev[TPS65912_NUM_REGULATOR]; struct tps_info *info[TPS65912_NUM_REGULATOR]; /* for read/write access */ struct mutex io_lock; int mode; int (*get_ctrl_reg)(int); int dcdc1_range; int dcdc2_range; int dcdc3_range; int dcdc4_range; int pwm_mode_reg; int eco_reg; }; static int tps65912_get_range(struct tps65912_reg *pmic, int id) { struct tps65912 *mfd = pmic->mfd; if (id > TPS65912_REG_DCDC4) return 0; switch (id) { case TPS65912_REG_DCDC1: pmic->dcdc1_range = tps65912_reg_read(mfd, TPS65912_DCDC1_LIMIT); if (pmic->dcdc1_range < 0) return pmic->dcdc1_range; pmic->dcdc1_range = (pmic->dcdc1_range & DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT; return pmic->dcdc1_range; case TPS65912_REG_DCDC2: pmic->dcdc2_range = tps65912_reg_read(mfd, TPS65912_DCDC2_LIMIT); if (pmic->dcdc2_range < 0) return pmic->dcdc2_range; pmic->dcdc2_range = (pmic->dcdc2_range & DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT; return pmic->dcdc2_range; case TPS65912_REG_DCDC3: pmic->dcdc3_range = tps65912_reg_read(mfd, TPS65912_DCDC3_LIMIT); if (pmic->dcdc3_range < 0) return pmic->dcdc3_range; pmic->dcdc3_range = (pmic->dcdc3_range & DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT; return pmic->dcdc3_range; case TPS65912_REG_DCDC4: pmic->dcdc4_range = tps65912_reg_read(mfd, TPS65912_DCDC4_LIMIT); if (pmic->dcdc4_range < 0) return pmic->dcdc4_range; pmic->dcdc4_range = (pmic->dcdc4_range & DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT; return pmic->dcdc4_range; default: return 0; } } static unsigned long tps65912_vsel_to_uv_range0(u8 vsel) { unsigned long uv; uv = ((vsel * 12500) + 500000); return uv; } static unsigned long tps65912_vsel_to_uv_range1(u8 vsel) { unsigned long uv; uv = ((vsel * 12500) + 700000); return uv; } static unsigned long tps65912_vsel_to_uv_range2(u8 vsel) { unsigned long uv; uv = ((vsel * 25000) + 500000); return uv; } static unsigned long tps65912_vsel_to_uv_range3(u8 vsel) { unsigned long uv; if (vsel == 0x3f) uv = 3800000; else uv = ((vsel * 50000) + 500000); return uv; } static unsigned long tps65912_vsel_to_uv_ldo(u8 vsel) { unsigned long uv = 0; if (vsel <= 32) uv = ((vsel * 25000) + 800000); else if (vsel > 32 && vsel <= 60) uv = (((vsel - 32) * 50000) + 1600000); else if (vsel > 60) uv = (((vsel - 60) * 100000) + 3000000); return uv; } static int tps65912_get_ctrl_register(int id) { switch (id) { case TPS65912_REG_DCDC1: return TPS65912_DCDC1_AVS; case TPS65912_REG_DCDC2: return TPS65912_DCDC2_AVS; case TPS65912_REG_DCDC3: return TPS65912_DCDC3_AVS; case TPS65912_REG_DCDC4: return TPS65912_DCDC4_AVS; case TPS65912_REG_LDO1: return TPS65912_LDO1_AVS; case TPS65912_REG_LDO2: return TPS65912_LDO2_AVS; case TPS65912_REG_LDO3: return TPS65912_LDO3_AVS; case TPS65912_REG_LDO4: return TPS65912_LDO4_AVS; case TPS65912_REG_LDO5: return TPS65912_LDO5; case TPS65912_REG_LDO6: return TPS65912_LDO6; case TPS65912_REG_LDO7: return TPS65912_LDO7; case TPS65912_REG_LDO8: return TPS65912_LDO8; case TPS65912_REG_LDO9: return TPS65912_LDO9; case TPS65912_REG_LDO10: return TPS65912_LDO10; default: return -EINVAL; } } static int tps65912_get_dcdc_sel_register(struct tps65912_reg *pmic, int id) { struct tps65912 *mfd = pmic->mfd; int opvsel = 0, sr = 0; u8 reg = 0; if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_DCDC4) return -EINVAL; switch (id) { case TPS65912_REG_DCDC1: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC1_OP); sr = ((opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT); if (sr) reg = TPS65912_DCDC1_AVS; else reg = TPS65912_DCDC1_OP; break; case TPS65912_REG_DCDC2: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC2_OP); sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT; if (sr) reg = TPS65912_DCDC2_AVS; else reg = TPS65912_DCDC2_OP; break; case TPS65912_REG_DCDC3: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC3_OP); sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT; if (sr) reg = TPS65912_DCDC3_AVS; else reg = TPS65912_DCDC3_OP; break; case TPS65912_REG_DCDC4: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC4_OP); sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT; if (sr) reg = TPS65912_DCDC4_AVS; else reg = TPS65912_DCDC4_OP; break; } return reg; } static int tps65912_get_ldo_sel_register(struct tps65912_reg *pmic, int id) { struct tps65912 *mfd = pmic->mfd; int opvsel = 0, sr = 0; u8 reg = 0; if (id < TPS65912_REG_LDO1 || id > TPS65912_REG_LDO10) return -EINVAL; switch (id) { case TPS65912_REG_LDO1: opvsel = tps65912_reg_read(mfd, TPS65912_LDO1_OP); sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT; if (sr) reg = TPS65912_LDO1_AVS; else reg = TPS65912_LDO1_OP; break; case TPS65912_REG_LDO2: opvsel = tps65912_reg_read(mfd, TPS65912_LDO2_OP); sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT; if (sr) reg = TPS65912_LDO2_AVS; else reg = TPS65912_LDO2_OP; break; case TPS65912_REG_LDO3: opvsel = tps65912_reg_read(mfd, TPS65912_LDO3_OP); sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT; if (sr) reg = TPS65912_LDO3_AVS; else reg = TPS65912_LDO3_OP; break; case TPS65912_REG_LDO4: opvsel = tps65912_reg_read(mfd, TPS65912_LDO4_OP); sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT; if (sr) reg = TPS65912_LDO4_AVS; else reg = TPS65912_LDO4_OP; break; case TPS65912_REG_LDO5: reg = TPS65912_LDO5; break; case TPS65912_REG_LDO6: reg = TPS65912_LDO6; break; case TPS65912_REG_LDO7: reg = TPS65912_LDO7; break; case TPS65912_REG_LDO8: reg = TPS65912_LDO8; break; case TPS65912_REG_LDO9: reg = TPS65912_LDO9; break; case TPS65912_REG_LDO10: reg = TPS65912_LDO10; break; } return reg; } static int tps65912_get_mode_regiters(struct tps65912_reg *pmic, int id) { switch (id) { case TPS65912_REG_DCDC1: pmic->pwm_mode_reg = TPS65912_DCDC1_CTRL; pmic->eco_reg = TPS65912_DCDC1_AVS; break; case TPS65912_REG_DCDC2: pmic->pwm_mode_reg = TPS65912_DCDC2_CTRL; pmic->eco_reg = TPS65912_DCDC2_AVS; break; case TPS65912_REG_DCDC3: pmic->pwm_mode_reg = TPS65912_DCDC3_CTRL; pmic->eco_reg = TPS65912_DCDC3_AVS; break; case TPS65912_REG_DCDC4: pmic->pwm_mode_reg = TPS65912_DCDC4_CTRL; pmic->eco_reg = TPS65912_DCDC4_AVS; break; default: return -EINVAL; } return 0; } static int tps65912_reg_is_enabled(struct regulator_dev *dev) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int reg, value, id = rdev_get_id(dev); if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10) return -EINVAL; reg = pmic->get_ctrl_reg(id); if (reg < 0) return reg; value = tps65912_reg_read(mfd, reg); if (value < 0) return value; return value & TPS65912_REG_ENABLED; } static int tps65912_reg_enable(struct regulator_dev *dev) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int id = rdev_get_id(dev); int reg; if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10) return -EINVAL; reg = pmic->get_ctrl_reg(id); if (reg < 0) return reg; return tps65912_set_bits(mfd, reg, TPS65912_REG_ENABLED); } static int tps65912_reg_disable(struct regulator_dev *dev) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int id = rdev_get_id(dev), reg; reg = pmic->get_ctrl_reg(id); if (reg < 0) return reg; return tps65912_clear_bits(mfd, reg, TPS65912_REG_ENABLED); } static int tps65912_set_mode(struct regulator_dev *dev, unsigned int mode) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int pwm_mode, eco, id = rdev_get_id(dev); tps65912_get_mode_regiters(pmic, id); pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg); eco = tps65912_reg_read(mfd, pmic->eco_reg); pwm_mode &= DCDCCTRL_DCDC_MODE_MASK; eco &= DCDC_AVS_ECO_MASK; switch (mode) { case REGULATOR_MODE_FAST: /* Verify if mode alredy set */ if (pwm_mode && !eco) break; tps65912_set_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK); tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK); break; case REGULATOR_MODE_NORMAL: case REGULATOR_MODE_IDLE: if (!pwm_mode && !eco) break; tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK); tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK); break; case REGULATOR_MODE_STANDBY: if (!pwm_mode && eco) break; tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK); tps65912_set_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK); break; default: return -EINVAL; } return 0; } static unsigned int tps65912_get_mode(struct regulator_dev *dev) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int pwm_mode, eco, mode = 0, id = rdev_get_id(dev); tps65912_get_mode_regiters(pmic, id); pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg); eco = tps65912_reg_read(mfd, pmic->eco_reg); pwm_mode &= DCDCCTRL_DCDC_MODE_MASK; eco &= DCDC_AVS_ECO_MASK; if (pwm_mode && !eco) mode = REGULATOR_MODE_FAST; else if (!pwm_mode && !eco) mode = REGULATOR_MODE_NORMAL; else if (!pwm_mode && eco) mode = REGULATOR_MODE_STANDBY; return mode; } static int tps65912_get_voltage_dcdc(struct regulator_dev *dev) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int id = rdev_get_id(dev), voltage = 0, range; int opvsel = 0, avsel = 0, sr, vsel; switch (id) { case TPS65912_REG_DCDC1: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC1_OP); avsel = tps65912_reg_read(mfd, TPS65912_DCDC1_AVS); range = pmic->dcdc1_range; break; case TPS65912_REG_DCDC2: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC2_OP); avsel = tps65912_reg_read(mfd, TPS65912_DCDC2_AVS); range = pmic->dcdc2_range; break; case TPS65912_REG_DCDC3: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC3_OP); avsel = tps65912_reg_read(mfd, TPS65912_DCDC3_AVS); range = pmic->dcdc3_range; break; case TPS65912_REG_DCDC4: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC4_OP); avsel = tps65912_reg_read(mfd, TPS65912_DCDC4_AVS); range = pmic->dcdc4_range; break; default: return -EINVAL; } sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT; if (sr) vsel = avsel; else vsel = opvsel; vsel &= 0x3F; switch (range) { case 0: /* 0.5 - 1.2875V in 12.5mV steps */ voltage = tps65912_vsel_to_uv_range0(vsel); break; case 1: /* 0.7 - 1.4875V in 12.5mV steps */ voltage = tps65912_vsel_to_uv_range1(vsel); break; case 2: /* 0.5 - 2.075V in 25mV steps */ voltage = tps65912_vsel_to_uv_range2(vsel); break; case 3: /* 0.5 - 3.8V in 50mV steps */ voltage = tps65912_vsel_to_uv_range3(vsel); break; } return voltage; } static int tps65912_get_voltage_dcdc(struct regulator_dev *dev) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int id = rdev_get_id(dev); int opvsel = 0, avsel = 0, sr, vsel; switch (id) { case TPS65912_REG_DCDC1: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC1_OP); avsel = tps65912_reg_read(mfd, TPS65912_DCDC1_AVS); break; case TPS65912_REG_DCDC2: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC2_OP); avsel = tps65912_reg_read(mfd, TPS65912_DCDC2_AVS); break; case TPS65912_REG_DCDC3: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC3_OP); avsel = tps65912_reg_read(mfd, TPS65912_DCDC3_AVS); break; case TPS65912_REG_DCDC4: opvsel = tps65912_reg_read(mfd, TPS65912_DCDC4_OP); avsel = tps65912_reg_read(mfd, TPS65912_DCDC4_AVS); break; default: return -EINVAL; } sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT; if (sr) vsel = avsel; else vsel = opvsel; vsel &= 0x3F; return tps65912_list_voltage_dcdc(dev, vsel); } static int tps65912_set_voltage_dcdc_sel(struct regulator_dev *dev, unsigned selector) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int id = rdev_get_id(dev); int value; u8 reg; reg = tps65912_get_dcdc_sel_register(pmic, id); value = tps65912_reg_read(mfd, reg); value &= 0xC0; return tps65912_reg_write(mfd, reg, selector | value); } static int tps65912_get_voltage_ldo(struct regulator_dev *dev) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int id = rdev_get_id(dev); int vsel = 0; u8 reg; reg = tps65912_get_ldo_sel_register(pmic, id); vsel = tps65912_reg_read(mfd, reg); vsel &= 0x3F; return tps65912_vsel_to_uv_ldo(vsel); } static int tps65912_set_voltage_ldo_sel(struct regulator_dev *dev, unsigned selector) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); struct tps65912 *mfd = pmic->mfd; int id = rdev_get_id(dev), reg, value; reg = tps65912_get_ldo_sel_register(pmic, id); value = tps65912_reg_read(mfd, reg); value &= 0xC0; return tps65912_reg_write(mfd, reg, selector | value); } static int tps65912_list_voltage_dcdc(struct regulator_dev *dev, unsigned selector) { struct tps65912_reg *pmic = rdev_get_drvdata(dev); int range, voltage = 0, id = rdev_get_id(dev); switch (id) { case TPS65912_REG_DCDC1: range = pmic->dcdc1_range; break; case TPS65912_REG_DCDC2: range = pmic->dcdc2_range; break; case TPS65912_REG_DCDC3: range = pmic->dcdc3_range; break; case TPS65912_REG_DCDC4: range = pmic->dcdc4_range; break; default: return -EINVAL; } switch (range) { case 0: /* 0.5 - 1.2875V in 12.5mV steps */ voltage = tps65912_vsel_to_uv_range0(selector); break; case 1: /* 0.7 - 1.4875V in 12.5mV steps */ voltage = tps65912_vsel_to_uv_range1(selector); break; case 2: /* 0.5 - 2.075V in 25mV steps */ voltage = tps65912_vsel_to_uv_range2(selector); break; case 3: /* 0.5 - 3.8V in 50mV steps */ voltage = tps65912_vsel_to_uv_range3(selector); break; } return voltage; } static int tps65912_list_voltage_ldo(struct regulator_dev *dev, unsigned selector) { int ldo = rdev_get_id(dev); if (ldo < TPS65912_REG_LDO1 || ldo > TPS65912_REG_LDO10) return -EINVAL; return tps65912_vsel_to_uv_ldo(selector); } /* Operations permitted on DCDCx */ static struct regulator_ops tps65912_ops_dcdc = { .is_enabled = tps65912_reg_is_enabled, .enable = tps65912_reg_enable, .disable = tps65912_reg_disable, .set_mode = tps65912_set_mode, .get_mode = tps65912_get_mode, .get_voltage = tps65912_get_voltage_dcdc, .set_voltage_sel = tps65912_set_voltage_dcdc_sel, .list_voltage = tps65912_list_voltage_dcdc, }; /* Operations permitted on LDOx */ static struct regulator_ops tps65912_ops_ldo = { .is_enabled = tps65912_reg_is_enabled, .enable = tps65912_reg_enable, .disable = tps65912_reg_disable, .get_voltage = tps65912_get_voltage_ldo, .set_voltage_sel = tps65912_set_voltage_ldo_sel, .list_voltage = tps65912_list_voltage_ldo, }; static __devinit int tps65912_probe(struct platform_device *pdev) { struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent); struct tps_info *info; struct regulator_init_data *reg_data; struct regulator_dev *rdev; struct tps65912_reg *pmic; struct tps65912_board *pmic_plat_data; int i, err; pmic_plat_data = dev_get_platdata(tps65912->dev); if (!pmic_plat_data) return -EINVAL; reg_data = pmic_plat_data->tps65912_pmic_init_data; pmic = kzalloc(sizeof(*pmic), GFP_KERNEL); if (!pmic) return -ENOMEM; mutex_init(&pmic->io_lock); pmic->mfd = tps65912; platform_set_drvdata(pdev, pmic); pmic->get_ctrl_reg = &tps65912_get_ctrl_register; info = tps65912_regs; for (i = 0; i < TPS65912_NUM_REGULATOR; i++, info++, reg_data++) { int range = 0; /* Register the regulators */ pmic->info[i] = info; pmic->desc[i].name = info->name; pmic->desc[i].id = i; pmic->desc[i].n_voltages = 64; pmic->desc[i].ops = (i > TPS65912_REG_DCDC4 ? &tps65912_ops_ldo : &tps65912_ops_dcdc); pmic->desc[i].type = REGULATOR_VOLTAGE; pmic->desc[i].owner = THIS_MODULE; range = tps65912_get_range(pmic, i); rdev = regulator_register(&pmic->desc[i], tps65912->dev, reg_data, pmic); if (IS_ERR(rdev)) { dev_err(tps65912->dev, "failed to register %s regulator\n", pdev->name); err = PTR_ERR(rdev); goto err; } /* Save regulator for cleanup */ pmic->rdev[i] = rdev; } return 0; err: while (--i >= 0) regulator_unregister(pmic->rdev[i]); kfree(pmic); return err; } static int __devexit tps65912_remove(struct platform_device *pdev) { struct tps65912_reg *tps65912_reg = platform_get_drvdata(pdev); int i; for (i = 0; i < TPS65912_NUM_REGULATOR; i++) regulator_unregister(tps65912_reg->rdev[i]); kfree(tps65912_reg); return 0; } static struct platform_driver tps65912_driver = { .driver = { .name = "tps65912-pmic", .owner = THIS_MODULE, }, .probe = tps65912_probe, .remove = __devexit_p(tps65912_remove), }; /** * tps65912_init * * Module init function */ static int __init tps65912_init(void) { return platform_driver_register(&tps65912_driver); } subsys_initcall(tps65912_init); /** * tps65912_cleanup * * Module exit function */ static void __exit tps65912_cleanup(void) { platform_driver_unregister(&tps65912_driver); } module_exit(tps65912_cleanup); MODULE_AUTHOR("Margarita Olaya Cabrera "); MODULE_DESCRIPTION("TPS65912 voltage regulator driver"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:tps65912-pmic");