// SPDX-License-Identifier: GPL-2.0-only // Copyright (c) 2017, 2019-2020, The Linux Foundation. All rights reserved. // Copyright (c) 2023, Linaro Limited #include #include #include #include #include #include #include #include #include #define REFGEN_REG_BIAS_EN 0x08 #define REFGEN_BIAS_EN_MASK GENMASK(2, 0) #define REFGEN_BIAS_EN_ENABLE 0x7 #define REFGEN_BIAS_EN_DISABLE 0x6 #define REFGEN_REG_REFGEN_STATUS 0xc #define REFGEN_STATUS_OUT_MASK BIT(3) #define REFGEN_REG_BG_CTRL 0x14 #define REFGEN_BG_CTRL_MASK GENMASK(2, 1) #define REFGEN_BG_CTRL_ENABLE 0x3 #define REFGEN_BG_CTRL_DISABLE 0x2 #define REFGEN_REG_PWRDWN_CTRL5 0x80 #define REFGEN_PWRDWN_CTRL5_MASK BIT(0) #define REFGEN_PWRDWN_CTRL5_ENABLE 0x1 struct qcom_refgen_regulator_data { const struct regulator_desc *rdesc; bool has_clocks; }; struct qcom_refgen_drvdata { struct clk_bulk_data *clks; int num_clks; bool is_enabled; }; static int qcom_sdm845_refgen_enable(struct regulator_dev *rdev) { regmap_update_bits(rdev->regmap, REFGEN_REG_BG_CTRL, REFGEN_BG_CTRL_MASK, FIELD_PREP(REFGEN_BG_CTRL_MASK, REFGEN_BG_CTRL_ENABLE)); regmap_write(rdev->regmap, REFGEN_REG_BIAS_EN, FIELD_PREP(REFGEN_BIAS_EN_MASK, REFGEN_BIAS_EN_ENABLE)); return 0; } static int qcom_sdm845_refgen_disable(struct regulator_dev *rdev) { regmap_write(rdev->regmap, REFGEN_REG_BIAS_EN, FIELD_PREP(REFGEN_BIAS_EN_MASK, REFGEN_BIAS_EN_DISABLE)); regmap_update_bits(rdev->regmap, REFGEN_REG_BG_CTRL, REFGEN_BG_CTRL_MASK, FIELD_PREP(REFGEN_BG_CTRL_MASK, REFGEN_BG_CTRL_DISABLE)); return 0; } static int qcom_sdm845_refgen_is_enabled(struct regulator_dev *rdev) { u32 val; regmap_read(rdev->regmap, REFGEN_REG_BG_CTRL, &val); if (FIELD_GET(REFGEN_BG_CTRL_MASK, val) != REFGEN_BG_CTRL_ENABLE) return 0; regmap_read(rdev->regmap, REFGEN_REG_BIAS_EN, &val); if (FIELD_GET(REFGEN_BIAS_EN_MASK, val) != REFGEN_BIAS_EN_ENABLE) return 0; return 1; } static int qcom_ipq9650_refgen_enable(struct regulator_dev *rdev) { struct qcom_refgen_drvdata *drvdata = rdev_get_drvdata(rdev); int ret; ret = clk_bulk_prepare_enable(drvdata->num_clks, drvdata->clks); if (ret) return ret; drvdata->is_enabled = true; return 0; } static int qcom_ipq9650_refgen_disable(struct regulator_dev *rdev) { struct qcom_refgen_drvdata *drvdata = rdev_get_drvdata(rdev); clk_bulk_disable_unprepare(drvdata->num_clks, drvdata->clks); drvdata->is_enabled = false; return 0; } static int qcom_ipq9650_refgen_is_enabled(struct regulator_dev *rdev) { struct qcom_refgen_drvdata *drvdata = rdev_get_drvdata(rdev); return drvdata->is_enabled; } static int qcom_ipq9650_refgen_get_status(struct regulator_dev *rdev) { u32 val; regmap_read(rdev->regmap, REFGEN_REG_REFGEN_STATUS, &val); if (FIELD_GET(REFGEN_STATUS_OUT_MASK, val)) return REGULATOR_STATUS_ON; return REGULATOR_STATUS_OFF; } static const struct regulator_desc ipq9650_refgen_desc = { .enable_time = 5, .name = "refgen", .owner = THIS_MODULE, .type = REGULATOR_CURRENT, .ops = &(const struct regulator_ops) { .enable = qcom_ipq9650_refgen_enable, .disable = qcom_ipq9650_refgen_disable, .is_enabled = qcom_ipq9650_refgen_is_enabled, .get_status = qcom_ipq9650_refgen_get_status, }, }; static const struct regulator_desc sdm845_refgen_desc = { .enable_time = 5, .name = "refgen", .owner = THIS_MODULE, .type = REGULATOR_CURRENT, .ops = &(const struct regulator_ops) { .enable = qcom_sdm845_refgen_enable, .disable = qcom_sdm845_refgen_disable, .is_enabled = qcom_sdm845_refgen_is_enabled, }, }; static const struct regulator_desc sm8250_refgen_desc = { .enable_reg = REFGEN_REG_PWRDWN_CTRL5, .enable_mask = REFGEN_PWRDWN_CTRL5_MASK, .enable_val = REFGEN_PWRDWN_CTRL5_ENABLE, .disable_val = 0, .enable_time = 5, .name = "refgen", .owner = THIS_MODULE, .type = REGULATOR_CURRENT, .ops = &(const struct regulator_ops) { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, }, }; static const struct qcom_refgen_regulator_data ipq9650_data = { .rdesc = &ipq9650_refgen_desc, .has_clocks = true, }; static const struct qcom_refgen_regulator_data sdm845_data = { .rdesc = &sdm845_refgen_desc, }; static const struct qcom_refgen_regulator_data sm8250_data = { .rdesc = &sm8250_refgen_desc, }; static const struct regmap_config qcom_refgen_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, }; static int qcom_refgen_probe(struct platform_device *pdev) { const struct qcom_refgen_regulator_data *data; struct qcom_refgen_drvdata *drvdata = NULL; struct regulator_init_data *init_data; struct regulator_config config = {}; const struct regulator_desc *rdesc; struct device *dev = &pdev->dev; struct regulator_dev *rdev; struct regmap *regmap; void __iomem *base; data = of_device_get_match_data(dev); if (!data) return -ENODATA; if (data->has_clocks) { drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); if (!drvdata) return -ENOMEM; drvdata->num_clks = devm_clk_bulk_get_all(dev, &drvdata->clks); if (drvdata->num_clks < 0) return dev_err_probe(dev, drvdata->num_clks, "failed to get clocks\n"); } rdesc = data->rdesc; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) return PTR_ERR(base); regmap = devm_regmap_init_mmio(dev, base, &qcom_refgen_regmap_config); if (IS_ERR(regmap)) return PTR_ERR(regmap); init_data = of_get_regulator_init_data(dev, dev->of_node, rdesc); if (!init_data) return -ENOMEM; config.dev = dev; config.init_data = init_data; config.of_node = dev->of_node; config.regmap = regmap; config.driver_data = drvdata; rdev = devm_regulator_register(dev, rdesc, &config); if (IS_ERR(rdev)) return PTR_ERR(rdev); return 0; } static const struct of_device_id qcom_refgen_match_table[] = { { .compatible = "qcom,ipq9650-refgen-regulator", .data = &ipq9650_data }, { .compatible = "qcom,sdm845-refgen-regulator", .data = &sdm845_data }, { .compatible = "qcom,sm8250-refgen-regulator", .data = &sm8250_data }, { } }; MODULE_DEVICE_TABLE(of, qcom_refgen_match_table); static struct platform_driver qcom_refgen_driver = { .probe = qcom_refgen_probe, .driver = { .name = "qcom-refgen-regulator", .of_match_table = qcom_refgen_match_table, }, }; module_platform_driver(qcom_refgen_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Qualcomm REFGEN regulator driver");