| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2017 Spreadtrum Communications Inc. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/platform_device.h> |
| #include <linux/regmap.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/of_regulator.h> |
| |
| /* |
| * SC2731 regulator lock register |
| */ |
| #define SC2731_PWR_WR_PROT 0xf0c |
| #define SC2731_WR_UNLOCK_VALUE 0x6e7f |
| |
| /* |
| * SC2731 enable register |
| */ |
| #define SC2731_POWER_PD_SW 0xc28 |
| #define SC2731_LDO_CAMA0_PD 0xcfc |
| #define SC2731_LDO_CAMA1_PD 0xd04 |
| #define SC2731_LDO_CAMMOT_PD 0xd0c |
| #define SC2731_LDO_VLDO_PD 0xd6c |
| #define SC2731_LDO_EMMCCORE_PD 0xd2c |
| #define SC2731_LDO_SDCORE_PD 0xd74 |
| #define SC2731_LDO_SDIO_PD 0xd70 |
| #define SC2731_LDO_WIFIPA_PD 0xd4c |
| #define SC2731_LDO_USB33_PD 0xd5c |
| #define SC2731_LDO_CAMD0_PD 0xd7c |
| #define SC2731_LDO_CAMD1_PD 0xd84 |
| #define SC2731_LDO_CON_PD 0xd8c |
| #define SC2731_LDO_CAMIO_PD 0xd94 |
| #define SC2731_LDO_SRAM_PD 0xd78 |
| |
| /* |
| * SC2731 enable mask |
| */ |
| #define SC2731_DCDC_CPU0_PD_MASK BIT(4) |
| #define SC2731_DCDC_CPU1_PD_MASK BIT(3) |
| #define SC2731_DCDC_RF_PD_MASK BIT(11) |
| #define SC2731_LDO_CAMA0_PD_MASK BIT(0) |
| #define SC2731_LDO_CAMA1_PD_MASK BIT(0) |
| #define SC2731_LDO_CAMMOT_PD_MASK BIT(0) |
| #define SC2731_LDO_VLDO_PD_MASK BIT(0) |
| #define SC2731_LDO_EMMCCORE_PD_MASK BIT(0) |
| #define SC2731_LDO_SDCORE_PD_MASK BIT(0) |
| #define SC2731_LDO_SDIO_PD_MASK BIT(0) |
| #define SC2731_LDO_WIFIPA_PD_MASK BIT(0) |
| #define SC2731_LDO_USB33_PD_MASK BIT(0) |
| #define SC2731_LDO_CAMD0_PD_MASK BIT(0) |
| #define SC2731_LDO_CAMD1_PD_MASK BIT(0) |
| #define SC2731_LDO_CON_PD_MASK BIT(0) |
| #define SC2731_LDO_CAMIO_PD_MASK BIT(0) |
| #define SC2731_LDO_SRAM_PD_MASK BIT(0) |
| |
| /* |
| * SC2731 vsel register |
| */ |
| #define SC2731_DCDC_CPU0_VOL 0xc54 |
| #define SC2731_DCDC_CPU1_VOL 0xc64 |
| #define SC2731_DCDC_RF_VOL 0xcb8 |
| #define SC2731_LDO_CAMA0_VOL 0xd00 |
| #define SC2731_LDO_CAMA1_VOL 0xd08 |
| #define SC2731_LDO_CAMMOT_VOL 0xd10 |
| #define SC2731_LDO_VLDO_VOL 0xd28 |
| #define SC2731_LDO_EMMCCORE_VOL 0xd30 |
| #define SC2731_LDO_SDCORE_VOL 0xd38 |
| #define SC2731_LDO_SDIO_VOL 0xd40 |
| #define SC2731_LDO_WIFIPA_VOL 0xd50 |
| #define SC2731_LDO_USB33_VOL 0xd60 |
| #define SC2731_LDO_CAMD0_VOL 0xd80 |
| #define SC2731_LDO_CAMD1_VOL 0xd88 |
| #define SC2731_LDO_CON_VOL 0xd90 |
| #define SC2731_LDO_CAMIO_VOL 0xd98 |
| #define SC2731_LDO_SRAM_VOL 0xdB0 |
| |
| /* |
| * SC2731 vsel register mask |
| */ |
| #define SC2731_DCDC_CPU0_VOL_MASK GENMASK(8, 0) |
| #define SC2731_DCDC_CPU1_VOL_MASK GENMASK(8, 0) |
| #define SC2731_DCDC_RF_VOL_MASK GENMASK(8, 0) |
| #define SC2731_LDO_CAMA0_VOL_MASK GENMASK(7, 0) |
| #define SC2731_LDO_CAMA1_VOL_MASK GENMASK(7, 0) |
| #define SC2731_LDO_CAMMOT_VOL_MASK GENMASK(7, 0) |
| #define SC2731_LDO_VLDO_VOL_MASK GENMASK(7, 0) |
| #define SC2731_LDO_EMMCCORE_VOL_MASK GENMASK(7, 0) |
| #define SC2731_LDO_SDCORE_VOL_MASK GENMASK(7, 0) |
| #define SC2731_LDO_SDIO_VOL_MASK GENMASK(7, 0) |
| #define SC2731_LDO_WIFIPA_VOL_MASK GENMASK(7, 0) |
| #define SC2731_LDO_USB33_VOL_MASK GENMASK(7, 0) |
| #define SC2731_LDO_CAMD0_VOL_MASK GENMASK(6, 0) |
| #define SC2731_LDO_CAMD1_VOL_MASK GENMASK(6, 0) |
| #define SC2731_LDO_CON_VOL_MASK GENMASK(6, 0) |
| #define SC2731_LDO_CAMIO_VOL_MASK GENMASK(6, 0) |
| #define SC2731_LDO_SRAM_VOL_MASK GENMASK(6, 0) |
| |
| enum sc2731_regulator_id { |
| SC2731_BUCK_CPU0, |
| SC2731_BUCK_CPU1, |
| SC2731_BUCK_RF, |
| SC2731_LDO_CAMA0, |
| SC2731_LDO_CAMA1, |
| SC2731_LDO_CAMMOT, |
| SC2731_LDO_VLDO, |
| SC2731_LDO_EMMCCORE, |
| SC2731_LDO_SDCORE, |
| SC2731_LDO_SDIO, |
| SC2731_LDO_WIFIPA, |
| SC2731_LDO_USB33, |
| SC2731_LDO_CAMD0, |
| SC2731_LDO_CAMD1, |
| SC2731_LDO_CON, |
| SC2731_LDO_CAMIO, |
| SC2731_LDO_SRAM, |
| }; |
| |
| static const struct regulator_ops sc2731_regu_linear_ops = { |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .list_voltage = regulator_list_voltage_linear, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| }; |
| |
| #define SC2731_REGU_LINEAR(_id, en_reg, en_mask, vreg, vmask, \ |
| vstep, vmin, vmax) { \ |
| .name = #_id, \ |
| .of_match = of_match_ptr(#_id), \ |
| .ops = &sc2731_regu_linear_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .id = SC2731_##_id, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = vmin, \ |
| .n_voltages = ((vmax) - (vmin)) / (vstep) + 1, \ |
| .uV_step = vstep, \ |
| .enable_is_inverted = true, \ |
| .enable_val = 0, \ |
| .enable_reg = en_reg, \ |
| .enable_mask = en_mask, \ |
| .vsel_reg = vreg, \ |
| .vsel_mask = vmask, \ |
| } |
| |
| static const struct regulator_desc regulators[] = { |
| SC2731_REGU_LINEAR(BUCK_CPU0, SC2731_POWER_PD_SW, |
| SC2731_DCDC_CPU0_PD_MASK, SC2731_DCDC_CPU0_VOL, |
| SC2731_DCDC_CPU0_VOL_MASK, 3125, 400000, 1996875), |
| SC2731_REGU_LINEAR(BUCK_CPU1, SC2731_POWER_PD_SW, |
| SC2731_DCDC_CPU1_PD_MASK, SC2731_DCDC_CPU1_VOL, |
| SC2731_DCDC_CPU1_VOL_MASK, 3125, 400000, 1996875), |
| SC2731_REGU_LINEAR(BUCK_RF, SC2731_POWER_PD_SW, SC2731_DCDC_RF_PD_MASK, |
| SC2731_DCDC_RF_VOL, SC2731_DCDC_RF_VOL_MASK, |
| 3125, 600000, 2196875), |
| SC2731_REGU_LINEAR(LDO_CAMA0, SC2731_LDO_CAMA0_PD, |
| SC2731_LDO_CAMA0_PD_MASK, SC2731_LDO_CAMA0_VOL, |
| SC2731_LDO_CAMA0_VOL_MASK, 10000, 1200000, 3750000), |
| SC2731_REGU_LINEAR(LDO_CAMA1, SC2731_LDO_CAMA1_PD, |
| SC2731_LDO_CAMA1_PD_MASK, SC2731_LDO_CAMA1_VOL, |
| SC2731_LDO_CAMA1_VOL_MASK, 10000, 1200000, 3750000), |
| SC2731_REGU_LINEAR(LDO_CAMMOT, SC2731_LDO_CAMMOT_PD, |
| SC2731_LDO_CAMMOT_PD_MASK, SC2731_LDO_CAMMOT_VOL, |
| SC2731_LDO_CAMMOT_VOL_MASK, 10000, 1200000, 3750000), |
| SC2731_REGU_LINEAR(LDO_VLDO, SC2731_LDO_VLDO_PD, |
| SC2731_LDO_VLDO_PD_MASK, SC2731_LDO_VLDO_VOL, |
| SC2731_LDO_VLDO_VOL_MASK, 10000, 1200000, 3750000), |
| SC2731_REGU_LINEAR(LDO_EMMCCORE, SC2731_LDO_EMMCCORE_PD, |
| SC2731_LDO_EMMCCORE_PD_MASK, SC2731_LDO_EMMCCORE_VOL, |
| SC2731_LDO_EMMCCORE_VOL_MASK, 10000, 1200000, |
| 3750000), |
| SC2731_REGU_LINEAR(LDO_SDCORE, SC2731_LDO_SDCORE_PD, |
| SC2731_LDO_SDCORE_PD_MASK, SC2731_LDO_SDCORE_VOL, |
| SC2731_LDO_SDCORE_VOL_MASK, 10000, 1200000, 3750000), |
| SC2731_REGU_LINEAR(LDO_SDIO, SC2731_LDO_SDIO_PD, |
| SC2731_LDO_SDIO_PD_MASK, SC2731_LDO_SDIO_VOL, |
| SC2731_LDO_SDIO_VOL_MASK, 10000, 1200000, 3750000), |
| SC2731_REGU_LINEAR(LDO_WIFIPA, SC2731_LDO_WIFIPA_PD, |
| SC2731_LDO_WIFIPA_PD_MASK, SC2731_LDO_WIFIPA_VOL, |
| SC2731_LDO_WIFIPA_VOL_MASK, 10000, 1200000, 3750000), |
| SC2731_REGU_LINEAR(LDO_USB33, SC2731_LDO_USB33_PD, |
| SC2731_LDO_USB33_PD_MASK, SC2731_LDO_USB33_VOL, |
| SC2731_LDO_USB33_VOL_MASK, 10000, 1200000, 3750000), |
| SC2731_REGU_LINEAR(LDO_CAMD0, SC2731_LDO_CAMD0_PD, |
| SC2731_LDO_CAMD0_PD_MASK, SC2731_LDO_CAMD0_VOL, |
| SC2731_LDO_CAMD0_VOL_MASK, 6250, 1000000, 1793750), |
| SC2731_REGU_LINEAR(LDO_CAMD1, SC2731_LDO_CAMD1_PD, |
| SC2731_LDO_CAMD1_PD_MASK, SC2731_LDO_CAMD1_VOL, |
| SC2731_LDO_CAMD1_VOL_MASK, 6250, 1000000, 1793750), |
| SC2731_REGU_LINEAR(LDO_CON, SC2731_LDO_CON_PD, |
| SC2731_LDO_CON_PD_MASK, SC2731_LDO_CON_VOL, |
| SC2731_LDO_CON_VOL_MASK, 6250, 1000000, 1793750), |
| SC2731_REGU_LINEAR(LDO_CAMIO, SC2731_LDO_CAMIO_PD, |
| SC2731_LDO_CAMIO_PD_MASK, SC2731_LDO_CAMIO_VOL, |
| SC2731_LDO_CAMIO_VOL_MASK, 6250, 1000000, 1793750), |
| SC2731_REGU_LINEAR(LDO_SRAM, SC2731_LDO_SRAM_PD, |
| SC2731_LDO_SRAM_PD_MASK, SC2731_LDO_SRAM_VOL, |
| SC2731_LDO_SRAM_VOL_MASK, 6250, 1000000, 1793750), |
| }; |
| |
| static int sc2731_regulator_unlock(struct regmap *regmap) |
| { |
| return regmap_write(regmap, SC2731_PWR_WR_PROT, |
| SC2731_WR_UNLOCK_VALUE); |
| } |
| |
| static int sc2731_regulator_probe(struct platform_device *pdev) |
| { |
| int i, ret; |
| struct regmap *regmap; |
| struct regulator_config config = { }; |
| struct regulator_dev *rdev; |
| |
| regmap = dev_get_regmap(pdev->dev.parent, NULL); |
| if (!regmap) { |
| dev_err(&pdev->dev, "failed to get regmap.\n"); |
| return -ENODEV; |
| } |
| |
| ret = sc2731_regulator_unlock(regmap); |
| if (ret) { |
| dev_err(&pdev->dev, "failed to release regulator lock\n"); |
| return ret; |
| } |
| |
| config.dev = &pdev->dev; |
| config.regmap = regmap; |
| |
| for (i = 0; i < ARRAY_SIZE(regulators); i++) { |
| rdev = devm_regulator_register(&pdev->dev, ®ulators[i], |
| &config); |
| if (IS_ERR(rdev)) { |
| dev_err(&pdev->dev, "failed to register regulator %s\n", |
| regulators[i].name); |
| return PTR_ERR(rdev); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static struct platform_driver sc2731_regulator_driver = { |
| .driver = { |
| .name = "sc27xx-regulator", |
| }, |
| .probe = sc2731_regulator_probe, |
| }; |
| |
| module_platform_driver(sc2731_regulator_driver); |
| |
| MODULE_AUTHOR("Chen Junhui <erick.chen@spreadtrum.com>"); |
| MODULE_DESCRIPTION("Spreadtrum SC2731 regulator driver"); |
| MODULE_LICENSE("GPL v2"); |
