235 lines
7.2 KiB
C
235 lines
7.2 KiB
C
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/*
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* Device driver for regulators in Hi655x IC
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*
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* Copyright (c) 2016 Hisilicon.
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*
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* Authors:
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* Chen Feng <puck.chen@hisilicon.com>
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* Fei Wang <w.f@huawei.com>
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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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#include <linux/bitops.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/platform_device.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/hi655x-pmic.h>
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struct hi655x_regulator {
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unsigned int disable_reg;
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unsigned int status_reg;
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unsigned int ctrl_regs;
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unsigned int ctrl_mask;
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struct regulator_desc rdesc;
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};
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/* LDO7 & LDO10 */
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static const unsigned int ldo7_voltages[] = {
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1800000, 1850000, 2850000, 2900000,
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3000000, 3100000, 3200000, 3300000,
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};
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static const unsigned int ldo19_voltages[] = {
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1800000, 1850000, 1900000, 1750000,
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2800000, 2850000, 2900000, 3000000,
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};
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static const unsigned int ldo22_voltages[] = {
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900000, 1000000, 1050000, 1100000,
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1150000, 1175000, 1185000, 1200000,
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};
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enum hi655x_regulator_id {
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HI655X_LDO0,
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HI655X_LDO1,
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HI655X_LDO2,
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HI655X_LDO3,
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HI655X_LDO4,
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HI655X_LDO5,
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HI655X_LDO6,
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HI655X_LDO7,
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HI655X_LDO8,
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HI655X_LDO9,
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HI655X_LDO10,
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HI655X_LDO11,
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HI655X_LDO12,
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HI655X_LDO13,
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HI655X_LDO14,
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HI655X_LDO15,
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HI655X_LDO16,
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HI655X_LDO17,
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HI655X_LDO18,
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HI655X_LDO19,
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HI655X_LDO20,
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HI655X_LDO21,
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HI655X_LDO22,
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};
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static int hi655x_is_enabled(struct regulator_dev *rdev)
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{
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unsigned int value = 0;
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struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
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regmap_read(rdev->regmap, regulator->status_reg, &value);
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return (value & BIT(regulator->ctrl_mask));
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}
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static int hi655x_disable(struct regulator_dev *rdev)
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{
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int ret = 0;
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struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
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ret = regmap_write(rdev->regmap, regulator->disable_reg,
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BIT(regulator->ctrl_mask));
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return ret;
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}
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static const struct regulator_ops hi655x_regulator_ops = {
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.enable = regulator_enable_regmap,
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.disable = hi655x_disable,
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.is_enabled = hi655x_is_enabled,
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.list_voltage = regulator_list_voltage_table,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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};
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static const struct regulator_ops hi655x_ldo_linear_ops = {
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.enable = regulator_enable_regmap,
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.disable = hi655x_disable,
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.is_enabled = hi655x_is_enabled,
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.list_voltage = regulator_list_voltage_linear,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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};
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#define HI655X_LDO(_ID, vreg, vmask, ereg, dreg, \
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sreg, cmask, vtable) { \
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.rdesc = { \
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.name = #_ID, \
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.of_match = of_match_ptr(#_ID), \
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.ops = &hi655x_regulator_ops, \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = HI655X_##_ID, \
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.owner = THIS_MODULE, \
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.n_voltages = ARRAY_SIZE(vtable), \
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.volt_table = vtable, \
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.vsel_reg = HI655X_BUS_ADDR(vreg), \
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.vsel_mask = vmask, \
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.enable_reg = HI655X_BUS_ADDR(ereg), \
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.enable_mask = BIT(cmask), \
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}, \
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.disable_reg = HI655X_BUS_ADDR(dreg), \
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.status_reg = HI655X_BUS_ADDR(sreg), \
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.ctrl_mask = cmask, \
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}
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#define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg, \
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sreg, cmask, minv, nvolt, vstep) { \
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.rdesc = { \
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.name = #_ID, \
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.of_match = of_match_ptr(#_ID), \
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.ops = &hi655x_ldo_linear_ops, \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = HI655X_##_ID, \
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.owner = THIS_MODULE, \
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.min_uV = minv, \
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.n_voltages = nvolt, \
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.uV_step = vstep, \
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.vsel_reg = HI655X_BUS_ADDR(vreg), \
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.vsel_mask = vmask, \
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.enable_reg = HI655X_BUS_ADDR(ereg), \
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.enable_mask = BIT(cmask), \
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}, \
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.disable_reg = HI655X_BUS_ADDR(dreg), \
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.status_reg = HI655X_BUS_ADDR(sreg), \
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.ctrl_mask = cmask, \
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}
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static struct hi655x_regulator regulators[] = {
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HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01,
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2500000, 8, 100000),
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HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
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HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
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HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04,
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1600000, 8, 50000),
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HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05,
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2500000, 8, 100000),
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HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06,
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1600000, 8, 50000),
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HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00,
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2500000, 8, 100000),
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HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
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HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04,
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1650000, 8, 50000),
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HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
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};
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static int hi655x_regulator_probe(struct platform_device *pdev)
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{
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unsigned int i;
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struct hi655x_regulator *regulator;
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struct hi655x_pmic *pmic;
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struct regulator_config config = { };
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struct regulator_dev *rdev;
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pmic = dev_get_drvdata(pdev->dev.parent);
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if (!pmic) {
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dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
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return -ENODEV;
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}
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regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL);
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if (!regulator)
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return -ENOMEM;
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platform_set_drvdata(pdev, regulator);
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config.dev = pdev->dev.parent;
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config.regmap = pmic->regmap;
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config.driver_data = regulator;
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for (i = 0; i < ARRAY_SIZE(regulators); i++) {
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rdev = devm_regulator_register(&pdev->dev,
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®ulators[i].rdesc,
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&config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "failed to register regulator %s\n",
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regulator->rdesc.name);
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return PTR_ERR(rdev);
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}
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}
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return 0;
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}
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static const struct platform_device_id hi655x_regulator_table[] = {
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{ .name = "hi655x-regulator" },
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{},
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};
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MODULE_DEVICE_TABLE(platform, hi655x_regulator_table);
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static struct platform_driver hi655x_regulator_driver = {
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.id_table = hi655x_regulator_table,
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.driver = {
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.name = "hi655x-regulator",
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},
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.probe = hi655x_regulator_probe,
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};
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module_platform_driver(hi655x_regulator_driver);
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MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
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MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver");
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MODULE_LICENSE("GPL v2");
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