| // SPDX-License-Identifier: GPL-2.0 |
| // |
| // Device driver for regulators in Hi655x IC |
| // |
| // Copyright (c) 2016 HiSilicon Ltd. |
| // |
| // Authors: |
| // Chen Feng <puck.chen@hisilicon.com> |
| // Fei Wang <w.f@huawei.com> |
| |
| #include <linux/bitops.h> |
| #include <linux/device.h> |
| #include <linux/err.h> |
| #include <linux/module.h> |
| #include <linux/io.h> |
| #include <linux/of.h> |
| #include <linux/platform_device.h> |
| #include <linux/regmap.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/regulator/of_regulator.h> |
| #include <linux/mfd/hi655x-pmic.h> |
| |
| struct hi655x_regulator { |
| unsigned int disable_reg; |
| unsigned int status_reg; |
| struct regulator_desc rdesc; |
| }; |
| |
| /* LDO7 & LDO10 */ |
| static const unsigned int ldo7_voltages[] = { |
| 1800000, 1850000, 2850000, 2900000, |
| 3000000, 3100000, 3200000, 3300000, |
| }; |
| |
| static const unsigned int ldo19_voltages[] = { |
| 1800000, 1850000, 1900000, 1750000, |
| 2800000, 2850000, 2900000, 3000000, |
| }; |
| |
| static const unsigned int ldo22_voltages[] = { |
| 900000, 1000000, 1050000, 1100000, |
| 1150000, 1175000, 1185000, 1200000, |
| }; |
| |
| enum hi655x_regulator_id { |
| HI655X_LDO0, |
| HI655X_LDO1, |
| HI655X_LDO2, |
| HI655X_LDO3, |
| HI655X_LDO4, |
| HI655X_LDO5, |
| HI655X_LDO6, |
| HI655X_LDO7, |
| HI655X_LDO8, |
| HI655X_LDO9, |
| HI655X_LDO10, |
| HI655X_LDO11, |
| HI655X_LDO12, |
| HI655X_LDO13, |
| HI655X_LDO14, |
| HI655X_LDO15, |
| HI655X_LDO16, |
| HI655X_LDO17, |
| HI655X_LDO18, |
| HI655X_LDO19, |
| HI655X_LDO20, |
| HI655X_LDO21, |
| HI655X_LDO22, |
| }; |
| |
| static int hi655x_is_enabled(struct regulator_dev *rdev) |
| { |
| unsigned int value = 0; |
| const struct hi655x_regulator *regulator = rdev_get_drvdata(rdev); |
| |
| regmap_read(rdev->regmap, regulator->status_reg, &value); |
| return (value & rdev->desc->enable_mask); |
| } |
| |
| static int hi655x_disable(struct regulator_dev *rdev) |
| { |
| const struct hi655x_regulator *regulator = rdev_get_drvdata(rdev); |
| |
| return regmap_write(rdev->regmap, regulator->disable_reg, |
| rdev->desc->enable_mask); |
| } |
| |
| static const struct regulator_ops hi655x_regulator_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = hi655x_disable, |
| .is_enabled = hi655x_is_enabled, |
| .list_voltage = regulator_list_voltage_table, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| }; |
| |
| static const struct regulator_ops hi655x_ldo_linear_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = hi655x_disable, |
| .is_enabled = hi655x_is_enabled, |
| .list_voltage = regulator_list_voltage_linear, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| }; |
| |
| #define HI655X_LDO(_ID, vreg, vmask, ereg, dreg, \ |
| sreg, cmask, vtable) { \ |
| .rdesc = { \ |
| .name = #_ID, \ |
| .of_match = of_match_ptr(#_ID), \ |
| .ops = &hi655x_regulator_ops, \ |
| .regulators_node = of_match_ptr("regulators"), \ |
| .type = REGULATOR_VOLTAGE, \ |
| .id = HI655X_##_ID, \ |
| .owner = THIS_MODULE, \ |
| .n_voltages = ARRAY_SIZE(vtable), \ |
| .volt_table = vtable, \ |
| .vsel_reg = HI655X_BUS_ADDR(vreg), \ |
| .vsel_mask = vmask, \ |
| .enable_reg = HI655X_BUS_ADDR(ereg), \ |
| .enable_mask = BIT(cmask), \ |
| }, \ |
| .disable_reg = HI655X_BUS_ADDR(dreg), \ |
| .status_reg = HI655X_BUS_ADDR(sreg), \ |
| } |
| |
| #define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg, \ |
| sreg, cmask, minv, nvolt, vstep) { \ |
| .rdesc = { \ |
| .name = #_ID, \ |
| .of_match = of_match_ptr(#_ID), \ |
| .ops = &hi655x_ldo_linear_ops, \ |
| .regulators_node = of_match_ptr("regulators"), \ |
| .type = REGULATOR_VOLTAGE, \ |
| .id = HI655X_##_ID, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = minv, \ |
| .n_voltages = nvolt, \ |
| .uV_step = vstep, \ |
| .vsel_reg = HI655X_BUS_ADDR(vreg), \ |
| .vsel_mask = vmask, \ |
| .enable_reg = HI655X_BUS_ADDR(ereg), \ |
| .enable_mask = BIT(cmask), \ |
| }, \ |
| .disable_reg = HI655X_BUS_ADDR(dreg), \ |
| .status_reg = HI655X_BUS_ADDR(sreg), \ |
| } |
| |
| static const struct hi655x_regulator regulators[] = { |
| HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01, |
| 2500000, 8, 100000), |
| HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages), |
| HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages), |
| HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04, |
| 1600000, 8, 50000), |
| HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05, |
| 2500000, 8, 100000), |
| HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06, |
| 1600000, 8, 50000), |
| HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00, |
| 2500000, 8, 100000), |
| HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages), |
| HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04, |
| 1650000, 8, 50000), |
| HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages), |
| }; |
| |
| static int hi655x_regulator_probe(struct platform_device *pdev) |
| { |
| unsigned int i; |
| struct hi655x_pmic *pmic; |
| struct regulator_config config = { }; |
| struct regulator_dev *rdev; |
| |
| pmic = dev_get_drvdata(pdev->dev.parent); |
| if (!pmic) { |
| dev_err(&pdev->dev, "no pmic in the regulator parent node\n"); |
| return -ENODEV; |
| } |
| |
| config.dev = pdev->dev.parent; |
| config.regmap = pmic->regmap; |
| for (i = 0; i < ARRAY_SIZE(regulators); i++) { |
| config.driver_data = (void *) ®ulators[i]; |
| |
| rdev = devm_regulator_register(&pdev->dev, |
| ®ulators[i].rdesc, |
| &config); |
| if (IS_ERR(rdev)) { |
| dev_err(&pdev->dev, "failed to register regulator %s\n", |
| regulators[i].rdesc.name); |
| return PTR_ERR(rdev); |
| } |
| } |
| return 0; |
| } |
| |
| static const struct platform_device_id hi655x_regulator_table[] = { |
| { .name = "hi655x-regulator" }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(platform, hi655x_regulator_table); |
| |
| static struct platform_driver hi655x_regulator_driver = { |
| .id_table = hi655x_regulator_table, |
| .driver = { |
| .name = "hi655x-regulator", |
| }, |
| .probe = hi655x_regulator_probe, |
| }; |
| module_platform_driver(hi655x_regulator_driver); |
| |
| MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>"); |
| MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver"); |
| MODULE_LICENSE("GPL v2"); |
