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633 lines
19 KiB
633 lines
19 KiB
/* |
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* Device driver for regulators in Hi6421 IC |
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* |
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* Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd. |
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* http://www.hisilicon.com |
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* Copyright (c) <2013-2014> Linaro Ltd. |
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* http://www.linaro.org |
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* |
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* Author: Guodong Xu <guodong.xu@linaro.org> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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*/ |
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|
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#include <linux/slab.h> |
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#include <linux/device.h> |
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#include <linux/module.h> |
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#include <linux/err.h> |
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#include <linux/platform_device.h> |
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#include <linux/of.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/mfd/hi6421-pmic.h> |
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|
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/* |
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* struct hi6421_regulator_pdata - Hi6421 regulator data of platform device |
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* @lock: mutex to serialize regulator enable |
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*/ |
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struct hi6421_regulator_pdata { |
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struct mutex lock; |
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}; |
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|
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/* |
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* struct hi6421_regulator_info - hi6421 regulator information |
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* @desc: regulator description |
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* @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep |
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* @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only |
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*/ |
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struct hi6421_regulator_info { |
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struct regulator_desc desc; |
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u8 mode_mask; |
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u32 eco_microamp; |
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}; |
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|
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/* HI6421 regulators */ |
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enum hi6421_regulator_id { |
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HI6421_LDO0, |
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HI6421_LDO1, |
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HI6421_LDO2, |
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HI6421_LDO3, |
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HI6421_LDO4, |
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HI6421_LDO5, |
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HI6421_LDO6, |
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HI6421_LDO7, |
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HI6421_LDO8, |
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HI6421_LDO9, |
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HI6421_LDO10, |
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HI6421_LDO11, |
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HI6421_LDO12, |
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HI6421_LDO13, |
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HI6421_LDO14, |
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HI6421_LDO15, |
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HI6421_LDO16, |
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HI6421_LDO17, |
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HI6421_LDO18, |
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HI6421_LDO19, |
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HI6421_LDO20, |
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HI6421_LDOAUDIO, |
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HI6421_BUCK0, |
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HI6421_BUCK1, |
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HI6421_BUCK2, |
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HI6421_BUCK3, |
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HI6421_BUCK4, |
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HI6421_BUCK5, |
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HI6421_NUM_REGULATORS, |
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}; |
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#define HI6421_REGULATOR_OF_MATCH(_name, id) \ |
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{ \ |
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.name = #_name, \ |
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.driver_data = (void *) HI6421_##id, \ |
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} |
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static struct of_regulator_match hi6421_regulator_match[] = { |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout0, LDO0), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout1, LDO1), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout2, LDO2), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout3, LDO3), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout4, LDO4), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout5, LDO5), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout6, LDO6), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout7, LDO7), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout8, LDO8), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout9, LDO9), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout10, LDO10), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout11, LDO11), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout12, LDO12), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout13, LDO13), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout14, LDO14), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout15, LDO15), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout16, LDO16), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout17, LDO17), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout18, LDO18), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout19, LDO19), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout20, LDO20), |
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HI6421_REGULATOR_OF_MATCH(hi6421_vout_audio, LDOAUDIO), |
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HI6421_REGULATOR_OF_MATCH(hi6421_buck0, BUCK0), |
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HI6421_REGULATOR_OF_MATCH(hi6421_buck1, BUCK1), |
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HI6421_REGULATOR_OF_MATCH(hi6421_buck2, BUCK2), |
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HI6421_REGULATOR_OF_MATCH(hi6421_buck3, BUCK3), |
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HI6421_REGULATOR_OF_MATCH(hi6421_buck4, BUCK4), |
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HI6421_REGULATOR_OF_MATCH(hi6421_buck5, BUCK5), |
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}; |
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/* LDO 0, 4~7, 9~14, 16~20 have same voltage table. */ |
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static const unsigned int ldo_0_voltages[] = { |
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1500000, 1800000, 2400000, 2500000, |
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2600000, 2700000, 2850000, 3000000, |
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}; |
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/* LDO 8, 15 have same voltage table. */ |
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static const unsigned int ldo_8_voltages[] = { |
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1500000, 1800000, 2400000, 2600000, |
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2700000, 2850000, 3000000, 3300000, |
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}; |
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/* Ranges are sorted in ascending order. */ |
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static const struct regulator_linear_range ldo_audio_volt_range[] = { |
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REGULATOR_LINEAR_RANGE(2800000, 0, 3, 50000), |
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REGULATOR_LINEAR_RANGE(3000000, 4, 7, 100000), |
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}; |
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static const unsigned int buck_3_voltages[] = { |
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950000, 1050000, 1100000, 1117000, |
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1134000, 1150000, 1167000, 1200000, |
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}; |
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static const unsigned int buck_4_voltages[] = { |
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1150000, 1200000, 1250000, 1350000, |
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1700000, 1800000, 1900000, 2000000, |
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}; |
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static const unsigned int buck_5_voltages[] = { |
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1150000, 1200000, 1250000, 1350000, |
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1600000, 1700000, 1800000, 1900000, |
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}; |
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static const struct regulator_ops hi6421_ldo_ops; |
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static const struct regulator_ops hi6421_ldo_linear_ops; |
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static const struct regulator_ops hi6421_ldo_linear_range_ops; |
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static const struct regulator_ops hi6421_buck012_ops; |
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static const struct regulator_ops hi6421_buck345_ops; |
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#define HI6421_LDO_ENABLE_TIME (350) |
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/* |
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* _id - LDO id name string |
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* v_table - voltage table |
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* vreg - voltage select register |
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* vmask - voltage select mask |
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* ereg - enable register |
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* emask - enable mask |
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* odelay - off/on delay time in uS |
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* ecomask - eco mode mask |
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* ecoamp - eco mode load uppler limit in uA |
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*/ |
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#define HI6421_LDO(_id, v_table, vreg, vmask, ereg, emask, \ |
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odelay, ecomask, ecoamp) \ |
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[HI6421_##_id] = { \ |
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.desc = { \ |
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.name = #_id, \ |
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.ops = &hi6421_ldo_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.id = HI6421_##_id, \ |
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.owner = THIS_MODULE, \ |
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.n_voltages = ARRAY_SIZE(v_table), \ |
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.volt_table = v_table, \ |
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.vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ |
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.vsel_mask = vmask, \ |
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.enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ |
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.enable_mask = emask, \ |
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.enable_time = HI6421_LDO_ENABLE_TIME, \ |
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.off_on_delay = odelay, \ |
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}, \ |
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.mode_mask = ecomask, \ |
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.eco_microamp = ecoamp, \ |
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} |
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/* HI6421 LDO1~3 are linear voltage regulators at fixed uV_step |
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* |
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* _id - LDO id name string |
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* _min_uV - minimum voltage supported in uV |
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* n_volt - number of votages available |
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* vstep - voltage increase in each linear step in uV |
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* vreg - voltage select register |
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* vmask - voltage select mask |
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* ereg - enable register |
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* emask - enable mask |
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* odelay - off/on delay time in uS |
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* ecomask - eco mode mask |
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* ecoamp - eco mode load uppler limit in uA |
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*/ |
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#define HI6421_LDO_LINEAR(_id, _min_uV, n_volt, vstep, vreg, vmask, \ |
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ereg, emask, odelay, ecomask, ecoamp) \ |
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[HI6421_##_id] = { \ |
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.desc = { \ |
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.name = #_id, \ |
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.ops = &hi6421_ldo_linear_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.id = HI6421_##_id, \ |
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.owner = THIS_MODULE, \ |
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.min_uV = _min_uV, \ |
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.n_voltages = n_volt, \ |
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.uV_step = vstep, \ |
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.vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ |
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.vsel_mask = vmask, \ |
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.enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ |
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.enable_mask = emask, \ |
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.enable_time = HI6421_LDO_ENABLE_TIME, \ |
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.off_on_delay = odelay, \ |
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}, \ |
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.mode_mask = ecomask, \ |
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.eco_microamp = ecoamp, \ |
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} |
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/* HI6421 LDOAUDIO is a linear voltage regulator with two 4-step ranges |
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* |
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* _id - LDO id name string |
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* n_volt - number of votages available |
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* volt_ranges - array of regulator_linear_range |
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* vstep - voltage increase in each linear step in uV |
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* vreg - voltage select register |
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* vmask - voltage select mask |
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* ereg - enable register |
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* emask - enable mask |
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* odelay - off/on delay time in uS |
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* ecomask - eco mode mask |
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* ecoamp - eco mode load uppler limit in uA |
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*/ |
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#define HI6421_LDO_LINEAR_RANGE(_id, n_volt, volt_ranges, vreg, vmask, \ |
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ereg, emask, odelay, ecomask, ecoamp) \ |
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[HI6421_##_id] = { \ |
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.desc = { \ |
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.name = #_id, \ |
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.ops = &hi6421_ldo_linear_range_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.id = HI6421_##_id, \ |
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.owner = THIS_MODULE, \ |
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.n_voltages = n_volt, \ |
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.linear_ranges = volt_ranges, \ |
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.n_linear_ranges = ARRAY_SIZE(volt_ranges), \ |
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.vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ |
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.vsel_mask = vmask, \ |
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.enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ |
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.enable_mask = emask, \ |
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.enable_time = HI6421_LDO_ENABLE_TIME, \ |
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.off_on_delay = odelay, \ |
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}, \ |
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.mode_mask = ecomask, \ |
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.eco_microamp = ecoamp, \ |
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} |
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/* HI6421 BUCK0/1/2 are linear voltage regulators at fixed uV_step |
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* |
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* _id - BUCK0/1/2 id name string |
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* vreg - voltage select register |
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* vmask - voltage select mask |
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* ereg - enable register |
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* emask - enable mask |
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* sleepmask - mask of sleep mode |
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* etime - enable time |
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* odelay - off/on delay time in uS |
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*/ |
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#define HI6421_BUCK012(_id, vreg, vmask, ereg, emask, sleepmask, \ |
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etime, odelay) \ |
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[HI6421_##_id] = { \ |
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.desc = { \ |
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.name = #_id, \ |
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.ops = &hi6421_buck012_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.id = HI6421_##_id, \ |
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.owner = THIS_MODULE, \ |
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.min_uV = 700000, \ |
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.n_voltages = 128, \ |
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.uV_step = 7086, \ |
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.vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ |
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.vsel_mask = vmask, \ |
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.enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ |
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.enable_mask = emask, \ |
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.enable_time = etime, \ |
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.off_on_delay = odelay, \ |
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}, \ |
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.mode_mask = sleepmask, \ |
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} |
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|
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/* HI6421 BUCK3/4/5 share similar configurations as LDOs, with exception |
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* that it supports SLEEP mode, so has different .ops. |
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* |
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* _id - LDO id name string |
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* v_table - voltage table |
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* vreg - voltage select register |
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* vmask - voltage select mask |
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* ereg - enable register |
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* emask - enable mask |
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* odelay - off/on delay time in uS |
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* sleepmask - mask of sleep mode |
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*/ |
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#define HI6421_BUCK345(_id, v_table, vreg, vmask, ereg, emask, \ |
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odelay, sleepmask) \ |
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[HI6421_##_id] = { \ |
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.desc = { \ |
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.name = #_id, \ |
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.ops = &hi6421_buck345_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.id = HI6421_##_id, \ |
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.owner = THIS_MODULE, \ |
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.n_voltages = ARRAY_SIZE(v_table), \ |
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.volt_table = v_table, \ |
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.vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ |
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.vsel_mask = vmask, \ |
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.enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ |
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.enable_mask = emask, \ |
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.enable_time = HI6421_LDO_ENABLE_TIME, \ |
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.off_on_delay = odelay, \ |
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}, \ |
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.mode_mask = sleepmask, \ |
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} |
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/* HI6421 regulator information */ |
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static struct hi6421_regulator_info |
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hi6421_regulator_info[HI6421_NUM_REGULATORS] = { |
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HI6421_LDO(LDO0, ldo_0_voltages, 0x20, 0x07, 0x20, 0x10, |
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10000, 0x20, 8000), |
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HI6421_LDO_LINEAR(LDO1, 1700000, 4, 100000, 0x21, 0x03, 0x21, 0x10, |
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10000, 0x20, 5000), |
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HI6421_LDO_LINEAR(LDO2, 1050000, 8, 50000, 0x22, 0x07, 0x22, 0x10, |
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20000, 0x20, 8000), |
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HI6421_LDO_LINEAR(LDO3, 1050000, 8, 50000, 0x23, 0x07, 0x23, 0x10, |
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20000, 0x20, 8000), |
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HI6421_LDO(LDO4, ldo_0_voltages, 0x24, 0x07, 0x24, 0x10, |
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20000, 0x20, 8000), |
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HI6421_LDO(LDO5, ldo_0_voltages, 0x25, 0x07, 0x25, 0x10, |
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20000, 0x20, 8000), |
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HI6421_LDO(LDO6, ldo_0_voltages, 0x26, 0x07, 0x26, 0x10, |
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20000, 0x20, 8000), |
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HI6421_LDO(LDO7, ldo_0_voltages, 0x27, 0x07, 0x27, 0x10, |
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20000, 0x20, 5000), |
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HI6421_LDO(LDO8, ldo_8_voltages, 0x28, 0x07, 0x28, 0x10, |
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20000, 0x20, 8000), |
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HI6421_LDO(LDO9, ldo_0_voltages, 0x29, 0x07, 0x29, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO10, ldo_0_voltages, 0x2a, 0x07, 0x2a, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO11, ldo_0_voltages, 0x2b, 0x07, 0x2b, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO12, ldo_0_voltages, 0x2c, 0x07, 0x2c, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO13, ldo_0_voltages, 0x2d, 0x07, 0x2d, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO14, ldo_0_voltages, 0x2e, 0x07, 0x2e, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO15, ldo_8_voltages, 0x2f, 0x07, 0x2f, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO16, ldo_0_voltages, 0x30, 0x07, 0x30, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO17, ldo_0_voltages, 0x31, 0x07, 0x31, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO18, ldo_0_voltages, 0x32, 0x07, 0x32, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO19, ldo_0_voltages, 0x33, 0x07, 0x33, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO(LDO20, ldo_0_voltages, 0x34, 0x07, 0x34, 0x10, |
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40000, 0x20, 8000), |
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HI6421_LDO_LINEAR_RANGE(LDOAUDIO, 8, ldo_audio_volt_range, 0x36, |
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0x70, 0x36, 0x01, 40000, 0x02, 5000), |
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HI6421_BUCK012(BUCK0, 0x0d, 0x7f, 0x0c, 0x01, 0x10, 400, 20000), |
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HI6421_BUCK012(BUCK1, 0x0f, 0x7f, 0x0e, 0x01, 0x10, 400, 20000), |
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HI6421_BUCK012(BUCK2, 0x11, 0x7f, 0x10, 0x01, 0x10, 350, 100), |
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HI6421_BUCK345(BUCK3, buck_3_voltages, 0x13, 0x07, 0x12, 0x01, |
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20000, 0x10), |
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HI6421_BUCK345(BUCK4, buck_4_voltages, 0x15, 0x07, 0x14, 0x01, |
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20000, 0x10), |
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HI6421_BUCK345(BUCK5, buck_5_voltages, 0x17, 0x07, 0x16, 0x01, |
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20000, 0x10), |
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}; |
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static int hi6421_regulator_enable(struct regulator_dev *rdev) |
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{ |
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struct hi6421_regulator_pdata *pdata; |
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|
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pdata = dev_get_drvdata(rdev->dev.parent); |
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/* hi6421 spec requires regulator enablement must be serialized: |
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* - Because when BUCK, LDO switching from off to on, it will have |
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* a huge instantaneous current; so you can not turn on two or |
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* more LDO or BUCKs simultaneously, or it may burn the chip. |
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*/ |
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mutex_lock(&pdata->lock); |
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|
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/* call regulator regmap helper */ |
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regulator_enable_regmap(rdev); |
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|
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mutex_unlock(&pdata->lock); |
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return 0; |
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} |
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|
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static unsigned int hi6421_regulator_ldo_get_mode(struct regulator_dev *rdev) |
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{ |
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struct hi6421_regulator_info *info = rdev_get_drvdata(rdev); |
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u32 reg_val; |
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regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val); |
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if (reg_val & info->mode_mask) |
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return REGULATOR_MODE_IDLE; |
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|
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return REGULATOR_MODE_NORMAL; |
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} |
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|
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static unsigned int hi6421_regulator_buck_get_mode(struct regulator_dev *rdev) |
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{ |
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struct hi6421_regulator_info *info = rdev_get_drvdata(rdev); |
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u32 reg_val; |
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|
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regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val); |
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if (reg_val & info->mode_mask) |
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return REGULATOR_MODE_STANDBY; |
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|
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return REGULATOR_MODE_NORMAL; |
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} |
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static int hi6421_regulator_ldo_set_mode(struct regulator_dev *rdev, |
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unsigned int mode) |
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{ |
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struct hi6421_regulator_info *info = rdev_get_drvdata(rdev); |
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u32 new_mode; |
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|
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switch (mode) { |
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case REGULATOR_MODE_NORMAL: |
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new_mode = 0; |
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break; |
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case REGULATOR_MODE_IDLE: |
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new_mode = info->mode_mask; |
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break; |
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default: |
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return -EINVAL; |
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} |
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|
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/* set mode */ |
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regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
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info->mode_mask, new_mode); |
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|
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return 0; |
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} |
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|
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static int hi6421_regulator_buck_set_mode(struct regulator_dev *rdev, |
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unsigned int mode) |
|
{ |
|
struct hi6421_regulator_info *info = rdev_get_drvdata(rdev); |
|
u32 new_mode; |
|
|
|
switch (mode) { |
|
case REGULATOR_MODE_NORMAL: |
|
new_mode = 0; |
|
break; |
|
case REGULATOR_MODE_STANDBY: |
|
new_mode = info->mode_mask; |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
/* set mode */ |
|
regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
|
info->mode_mask, new_mode); |
|
|
|
return 0; |
|
} |
|
|
|
unsigned int hi6421_regulator_ldo_get_optimum_mode(struct regulator_dev *rdev, |
|
int input_uV, int output_uV, int load_uA) |
|
{ |
|
struct hi6421_regulator_info *info = rdev_get_drvdata(rdev); |
|
|
|
if (load_uA > info->eco_microamp) |
|
return REGULATOR_MODE_NORMAL; |
|
|
|
return REGULATOR_MODE_IDLE; |
|
} |
|
|
|
static const struct regulator_ops hi6421_ldo_ops = { |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.enable = hi6421_regulator_enable, |
|
.disable = regulator_disable_regmap, |
|
.list_voltage = regulator_list_voltage_table, |
|
.map_voltage = regulator_map_voltage_ascend, |
|
.get_voltage_sel = regulator_get_voltage_sel_regmap, |
|
.set_voltage_sel = regulator_set_voltage_sel_regmap, |
|
.get_mode = hi6421_regulator_ldo_get_mode, |
|
.set_mode = hi6421_regulator_ldo_set_mode, |
|
.get_optimum_mode = hi6421_regulator_ldo_get_optimum_mode, |
|
}; |
|
|
|
static const struct regulator_ops hi6421_ldo_linear_ops = { |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.enable = hi6421_regulator_enable, |
|
.disable = regulator_disable_regmap, |
|
.list_voltage = regulator_list_voltage_linear, |
|
.map_voltage = regulator_map_voltage_linear, |
|
.get_voltage_sel = regulator_get_voltage_sel_regmap, |
|
.set_voltage_sel = regulator_set_voltage_sel_regmap, |
|
.get_mode = hi6421_regulator_ldo_get_mode, |
|
.set_mode = hi6421_regulator_ldo_set_mode, |
|
.get_optimum_mode = hi6421_regulator_ldo_get_optimum_mode, |
|
}; |
|
|
|
static const struct regulator_ops hi6421_ldo_linear_range_ops = { |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.enable = hi6421_regulator_enable, |
|
.disable = regulator_disable_regmap, |
|
.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, |
|
.get_mode = hi6421_regulator_ldo_get_mode, |
|
.set_mode = hi6421_regulator_ldo_set_mode, |
|
.get_optimum_mode = hi6421_regulator_ldo_get_optimum_mode, |
|
}; |
|
|
|
static const struct regulator_ops hi6421_buck012_ops = { |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.enable = hi6421_regulator_enable, |
|
.disable = regulator_disable_regmap, |
|
.list_voltage = regulator_list_voltage_linear, |
|
.map_voltage = regulator_map_voltage_linear, |
|
.get_voltage_sel = regulator_get_voltage_sel_regmap, |
|
.set_voltage_sel = regulator_set_voltage_sel_regmap, |
|
.get_mode = hi6421_regulator_buck_get_mode, |
|
.set_mode = hi6421_regulator_buck_set_mode, |
|
}; |
|
|
|
static const struct regulator_ops hi6421_buck345_ops = { |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.enable = hi6421_regulator_enable, |
|
.disable = regulator_disable_regmap, |
|
.list_voltage = regulator_list_voltage_table, |
|
.map_voltage = regulator_map_voltage_ascend, |
|
.get_voltage_sel = regulator_get_voltage_sel_regmap, |
|
.set_voltage_sel = regulator_set_voltage_sel_regmap, |
|
.get_mode = hi6421_regulator_buck_get_mode, |
|
.set_mode = hi6421_regulator_buck_set_mode, |
|
}; |
|
|
|
static int hi6421_regulator_register(struct platform_device *pdev, |
|
struct regmap *rmap, |
|
struct regulator_init_data *init_data, |
|
int id, struct device_node *np) |
|
{ |
|
struct hi6421_regulator_info *info = NULL; |
|
struct regulator_config config = { }; |
|
struct regulator_dev *rdev; |
|
|
|
/* assign per-regulator data */ |
|
info = &hi6421_regulator_info[id]; |
|
|
|
config.dev = &pdev->dev; |
|
config.init_data = init_data; |
|
config.driver_data = info; |
|
config.regmap = rmap; |
|
config.of_node = np; |
|
|
|
/* register regulator with framework */ |
|
rdev = devm_regulator_register(&pdev->dev, &info->desc, &config); |
|
if (IS_ERR(rdev)) { |
|
dev_err(&pdev->dev, "failed to register regulator %s\n", |
|
info->desc.name); |
|
return PTR_ERR(rdev); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int hi6421_regulator_probe(struct platform_device *pdev) |
|
{ |
|
struct device *dev = &pdev->dev; |
|
struct device_node *np; |
|
struct hi6421_pmic *pmic; |
|
struct hi6421_regulator_pdata *pdata; |
|
int i, ret = 0; |
|
|
|
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
|
if (!pdata) |
|
return -ENOMEM; |
|
mutex_init(&pdata->lock); |
|
platform_set_drvdata(pdev, pdata); |
|
|
|
np = of_get_child_by_name(dev->parent->of_node, "regulators"); |
|
if (!np) |
|
return -ENODEV; |
|
|
|
ret = of_regulator_match(dev, np, |
|
hi6421_regulator_match, |
|
ARRAY_SIZE(hi6421_regulator_match)); |
|
of_node_put(np); |
|
if (ret < 0) { |
|
dev_err(dev, "Error parsing regulator init data: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
pmic = dev_get_drvdata(dev->parent); |
|
|
|
for (i = 0; i < ARRAY_SIZE(hi6421_regulator_info); i++) { |
|
ret = hi6421_regulator_register(pdev, pmic->regmap, |
|
hi6421_regulator_match[i].init_data, i, |
|
hi6421_regulator_match[i].of_node); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver hi6421_regulator_driver = { |
|
.driver = { |
|
.name = "hi6421-regulator", |
|
}, |
|
.probe = hi6421_regulator_probe, |
|
}; |
|
module_platform_driver(hi6421_regulator_driver); |
|
|
|
MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>"); |
|
MODULE_DESCRIPTION("Hi6421 regulator driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|