586 lines
18 KiB
C
586 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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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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#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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* 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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* 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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/* 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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/* 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 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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* _match - of match 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, _match, 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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.of_match = of_match_ptr(#_match), \
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.regulators_node = of_match_ptr("regulators"), \
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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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* _match - of match 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, _match, _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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.of_match = of_match_ptr(#_match), \
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.regulators_node = of_match_ptr("regulators"), \
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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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* _match - of match name string
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* n_volt - number of votages available
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* volt_ranges - array of 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, _match, 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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.of_match = of_match_ptr(#_match), \
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.regulators_node = of_match_ptr("regulators"), \
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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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* _match - of match 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, _match, 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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.of_match = of_match_ptr(#_match), \
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.regulators_node = of_match_ptr("regulators"), \
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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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/* 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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* _match - of match 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, _match, 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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.of_match = of_match_ptr(#_match), \
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.regulators_node = of_match_ptr("regulators"), \
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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, hi6421_vout0, ldo_0_voltages, 0x20, 0x07, 0x20, 0x10,
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10000, 0x20, 8000),
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HI6421_LDO_LINEAR(LDO1, hi6421_vout1, 1700000, 4, 100000, 0x21, 0x03,
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0x21, 0x10, 10000, 0x20, 5000),
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HI6421_LDO_LINEAR(LDO2, hi6421_vout2, 1050000, 8, 50000, 0x22, 0x07,
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0x22, 0x10, 20000, 0x20, 8000),
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HI6421_LDO_LINEAR(LDO3, hi6421_vout3, 1050000, 8, 50000, 0x23, 0x07,
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0x23, 0x10, 20000, 0x20, 8000),
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HI6421_LDO(LDO4, hi6421_vout4, ldo_0_voltages, 0x24, 0x07, 0x24, 0x10,
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20000, 0x20, 8000),
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HI6421_LDO(LDO5, hi6421_vout5, ldo_0_voltages, 0x25, 0x07, 0x25, 0x10,
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20000, 0x20, 8000),
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HI6421_LDO(LDO6, hi6421_vout6, ldo_0_voltages, 0x26, 0x07, 0x26, 0x10,
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20000, 0x20, 8000),
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HI6421_LDO(LDO7, hi6421_vout7, ldo_0_voltages, 0x27, 0x07, 0x27, 0x10,
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20000, 0x20, 5000),
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HI6421_LDO(LDO8, hi6421_vout8, ldo_8_voltages, 0x28, 0x07, 0x28, 0x10,
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20000, 0x20, 8000),
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HI6421_LDO(LDO9, hi6421_vout9, ldo_0_voltages, 0x29, 0x07, 0x29, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO10, hi6421_vout10, ldo_0_voltages, 0x2a, 0x07, 0x2a, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO11, hi6421_vout11, ldo_0_voltages, 0x2b, 0x07, 0x2b, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO12, hi6421_vout12, ldo_0_voltages, 0x2c, 0x07, 0x2c, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO13, hi6421_vout13, ldo_0_voltages, 0x2d, 0x07, 0x2d, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO14, hi6421_vout14, ldo_0_voltages, 0x2e, 0x07, 0x2e, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO15, hi6421_vout15, ldo_8_voltages, 0x2f, 0x07, 0x2f, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO16, hi6421_vout16, ldo_0_voltages, 0x30, 0x07, 0x30, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO17, hi6421_vout17, ldo_0_voltages, 0x31, 0x07, 0x31, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO18, hi6421_vout18, ldo_0_voltages, 0x32, 0x07, 0x32, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO19, hi6421_vout19, ldo_0_voltages, 0x33, 0x07, 0x33, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO(LDO20, hi6421_vout20, ldo_0_voltages, 0x34, 0x07, 0x34, 0x10,
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40000, 0x20, 8000),
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HI6421_LDO_LINEAR_RANGE(LDOAUDIO, hi6421_vout_audio, 8,
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ldo_audio_volt_range, 0x36, 0x70, 0x36, 0x01,
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40000, 0x02, 5000),
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HI6421_BUCK012(BUCK0, hi6421_buck0, 0x0d, 0x7f, 0x0c, 0x01, 0x10, 400,
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20000),
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HI6421_BUCK012(BUCK1, hi6421_buck1, 0x0f, 0x7f, 0x0e, 0x01, 0x10, 400,
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20000),
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HI6421_BUCK012(BUCK2, hi6421_buck2, 0x11, 0x7f, 0x10, 0x01, 0x10, 350,
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100),
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HI6421_BUCK345(BUCK3, hi6421_buck3, buck_3_voltages, 0x13, 0x07, 0x12,
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0x01, 20000, 0x10),
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HI6421_BUCK345(BUCK4, hi6421_buck4, buck_4_voltages, 0x15, 0x07, 0x14,
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0x01, 20000, 0x10),
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HI6421_BUCK345(BUCK5, hi6421_buck5, buck_5_voltages, 0x17, 0x07, 0x16,
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0x01, 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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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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/* call regulator regmap helper */
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regulator_enable_regmap(rdev);
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mutex_unlock(&pdata->lock);
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return 0;
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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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return REGULATOR_MODE_NORMAL;
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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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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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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);
|
|
u32 new_mode;
|
|
|
|
switch (mode) {
|
|
case REGULATOR_MODE_NORMAL:
|
|
new_mode = 0;
|
|
break;
|
|
case REGULATOR_MODE_IDLE:
|
|
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;
|
|
}
|
|
|
|
static int hi6421_regulator_buck_set_mode(struct regulator_dev *rdev,
|
|
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;
|
|
}
|
|
|
|
static 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_probe(struct platform_device *pdev)
|
|
{
|
|
struct hi6421_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
|
|
struct hi6421_regulator_pdata *pdata;
|
|
struct hi6421_regulator_info *info;
|
|
struct regulator_config config = { };
|
|
struct regulator_dev *rdev;
|
|
int i;
|
|
|
|
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata)
|
|
return -ENOMEM;
|
|
mutex_init(&pdata->lock);
|
|
platform_set_drvdata(pdev, pdata);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(hi6421_regulator_info); i++) {
|
|
/* assign per-regulator data */
|
|
info = &hi6421_regulator_info[i];
|
|
|
|
config.dev = pdev->dev.parent;
|
|
config.driver_data = info;
|
|
config.regmap = pmic->regmap;
|
|
|
|
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 const struct platform_device_id hi6421_regulator_table[] = {
|
|
{ .name = "hi6421-regulator" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, hi6421_regulator_table);
|
|
|
|
static struct platform_driver hi6421_regulator_driver = {
|
|
.id_table = hi6421_regulator_table,
|
|
.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");
|