/* * Device driver for regulators in Hi655x IC * * Copyright (c) 2016 Hisilicon. * * Authors: * Chen Feng * Fei Wang * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include struct hi655x_regulator { unsigned int disable_reg; unsigned int status_reg; unsigned int ctrl_regs; unsigned int ctrl_mask; 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; struct hi655x_regulator *regulator = rdev_get_drvdata(rdev); regmap_read(rdev->regmap, regulator->status_reg, &value); return (value & BIT(regulator->ctrl_mask)); } static int hi655x_disable(struct regulator_dev *rdev) { int ret = 0; struct hi655x_regulator *regulator = rdev_get_drvdata(rdev); ret = regmap_write(rdev->regmap, regulator->disable_reg, BIT(regulator->ctrl_mask)); return ret; } 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), \ .ctrl_mask = cmask, \ } #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), \ .ctrl_mask = cmask, \ } static 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_regulator *regulator; 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; } regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL); if (!regulator) return -ENOMEM; platform_set_drvdata(pdev, regulator); config.dev = pdev->dev.parent; config.regmap = pmic->regmap; config.driver_data = regulator; for (i = 0; i < ARRAY_SIZE(regulators); 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", regulator->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 "); MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver"); MODULE_LICENSE("GPL v2");