/* * Copyright (c) 2015, Sony Mobile Communications AB. * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/of_regulator.h> #include <linux/soc/qcom/smd-rpm.h> struct qcom_rpm_reg { struct device *dev; struct qcom_smd_rpm *rpm; u32 type; u32 id; struct regulator_desc desc; int is_enabled; int uV; }; struct rpm_regulator_req { u32 key; u32 nbytes; u32 value; }; #define RPM_KEY_SWEN 0x6e657773 /* "swen" */ #define RPM_KEY_UV 0x00007675 /* "uv" */ #define RPM_KEY_MA 0x0000616d /* "ma" */ static int rpm_reg_write_active(struct qcom_rpm_reg *vreg, struct rpm_regulator_req *req, size_t size) { return qcom_rpm_smd_write(vreg->rpm, QCOM_SMD_RPM_ACTIVE_STATE, vreg->type, vreg->id, req, size); } static int rpm_reg_enable(struct regulator_dev *rdev) { struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); struct rpm_regulator_req req; int ret; req.key = RPM_KEY_SWEN; req.nbytes = sizeof(u32); req.value = 1; ret = rpm_reg_write_active(vreg, &req, sizeof(req)); if (!ret) vreg->is_enabled = 1; return ret; } static int rpm_reg_is_enabled(struct regulator_dev *rdev) { struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); return vreg->is_enabled; } static int rpm_reg_disable(struct regulator_dev *rdev) { struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); struct rpm_regulator_req req; int ret; req.key = RPM_KEY_SWEN; req.nbytes = sizeof(u32); req.value = 0; ret = rpm_reg_write_active(vreg, &req, sizeof(req)); if (!ret) vreg->is_enabled = 0; return ret; } static int rpm_reg_get_voltage(struct regulator_dev *rdev) { struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); return vreg->uV; } static int rpm_reg_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV, unsigned *selector) { struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); struct rpm_regulator_req req; int ret = 0; req.key = RPM_KEY_UV; req.nbytes = sizeof(u32); req.value = min_uV; ret = rpm_reg_write_active(vreg, &req, sizeof(req)); if (!ret) vreg->uV = min_uV; return ret; } static int rpm_reg_set_load(struct regulator_dev *rdev, int load_uA) { struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev); struct rpm_regulator_req req; req.key = RPM_KEY_MA; req.nbytes = sizeof(u32); req.value = load_uA; return rpm_reg_write_active(vreg, &req, sizeof(req)); } static const struct regulator_ops rpm_smps_ldo_ops = { .enable = rpm_reg_enable, .disable = rpm_reg_disable, .is_enabled = rpm_reg_is_enabled, .get_voltage = rpm_reg_get_voltage, .set_voltage = rpm_reg_set_voltage, .set_load = rpm_reg_set_load, }; static const struct regulator_ops rpm_switch_ops = { .enable = rpm_reg_enable, .disable = rpm_reg_disable, .is_enabled = rpm_reg_is_enabled, }; static const struct regulator_desc pm8x41_hfsmps = { .linear_ranges = (struct regulator_linear_range[]) { REGULATOR_LINEAR_RANGE( 375000, 0, 95, 12500), REGULATOR_LINEAR_RANGE(1550000, 96, 158, 25000), }, .n_linear_ranges = 2, .n_voltages = 159, .ops = &rpm_smps_ldo_ops, }; static const struct regulator_desc pm8841_ftsmps = { .linear_ranges = (struct regulator_linear_range[]) { REGULATOR_LINEAR_RANGE(350000, 0, 184, 5000), REGULATOR_LINEAR_RANGE(700000, 185, 339, 10000), }, .n_linear_ranges = 2, .n_voltages = 340, .ops = &rpm_smps_ldo_ops, }; static const struct regulator_desc pm8941_boost = { .linear_ranges = (struct regulator_linear_range[]) { REGULATOR_LINEAR_RANGE(4000000, 0, 15, 100000), }, .n_linear_ranges = 1, .n_voltages = 16, .ops = &rpm_smps_ldo_ops, }; static const struct regulator_desc pm8941_pldo = { .linear_ranges = (struct regulator_linear_range[]) { REGULATOR_LINEAR_RANGE( 750000, 0, 30, 25000), REGULATOR_LINEAR_RANGE(1500000, 31, 99, 50000), }, .n_linear_ranges = 2, .n_voltages = 100, .ops = &rpm_smps_ldo_ops, }; static const struct regulator_desc pm8941_nldo = { .linear_ranges = (struct regulator_linear_range[]) { REGULATOR_LINEAR_RANGE(750000, 0, 63, 12500), }, .n_linear_ranges = 1, .n_voltages = 64, .ops = &rpm_smps_ldo_ops, }; static const struct regulator_desc pm8941_lnldo = { .fixed_uV = 1740000, .n_voltages = 1, .ops = &rpm_smps_ldo_ops, }; static const struct regulator_desc pm8941_switch = { .ops = &rpm_switch_ops, }; struct rpm_regulator_data { const char *name; u32 type; u32 id; const struct regulator_desc *desc; const char *supply; }; static const struct rpm_regulator_data rpm_pm8841_regulators[] = { { "s1", QCOM_SMD_RPM_SMPB, 1, &pm8x41_hfsmps, "vdd_s1" }, { "s2", QCOM_SMD_RPM_SMPB, 2, &pm8841_ftsmps, "vdd_s2" }, { "s3", QCOM_SMD_RPM_SMPB, 3, &pm8x41_hfsmps, "vdd_s3" }, { "s4", QCOM_SMD_RPM_SMPB, 4, &pm8841_ftsmps, "vdd_s4" }, { "s5", QCOM_SMD_RPM_SMPB, 5, &pm8841_ftsmps, "vdd_s5" }, { "s6", QCOM_SMD_RPM_SMPB, 6, &pm8841_ftsmps, "vdd_s6" }, { "s7", QCOM_SMD_RPM_SMPB, 7, &pm8841_ftsmps, "vdd_s7" }, { "s8", QCOM_SMD_RPM_SMPB, 8, &pm8841_ftsmps, "vdd_s8" }, {} }; static const struct rpm_regulator_data rpm_pm8941_regulators[] = { { "s1", QCOM_SMD_RPM_SMPA, 1, &pm8x41_hfsmps, "vdd_s1" }, { "s2", QCOM_SMD_RPM_SMPA, 2, &pm8x41_hfsmps, "vdd_s2" }, { "s3", QCOM_SMD_RPM_SMPA, 3, &pm8x41_hfsmps, "vdd_s3" }, { "s4", QCOM_SMD_RPM_BOOST, 1, &pm8941_boost }, { "l1", QCOM_SMD_RPM_LDOA, 1, &pm8941_nldo, "vdd_l1_l3" }, { "l2", QCOM_SMD_RPM_LDOA, 2, &pm8941_nldo, "vdd_l2_lvs1_2_3" }, { "l3", QCOM_SMD_RPM_LDOA, 3, &pm8941_nldo, "vdd_l1_l3" }, { "l4", QCOM_SMD_RPM_LDOA, 4, &pm8941_nldo, "vdd_l4_l11" }, { "l5", QCOM_SMD_RPM_LDOA, 5, &pm8941_lnldo, "vdd_l5_l7" }, { "l6", QCOM_SMD_RPM_LDOA, 6, &pm8941_pldo, "vdd_l6_l12_l14_l15" }, { "l7", QCOM_SMD_RPM_LDOA, 7, &pm8941_lnldo, "vdd_l5_l7" }, { "l8", QCOM_SMD_RPM_LDOA, 8, &pm8941_pldo, "vdd_l8_l16_l18_l19" }, { "l9", QCOM_SMD_RPM_LDOA, 9, &pm8941_pldo, "vdd_l9_l10_l17_l22" }, { "l10", QCOM_SMD_RPM_LDOA, 10, &pm8941_pldo, "vdd_l9_l10_l17_l22" }, { "l11", QCOM_SMD_RPM_LDOA, 11, &pm8941_nldo, "vdd_l4_l11" }, { "l12", QCOM_SMD_RPM_LDOA, 12, &pm8941_pldo, "vdd_l6_l12_l14_l15" }, { "l13", QCOM_SMD_RPM_LDOA, 13, &pm8941_pldo, "vdd_l13_l20_l23_l24" }, { "l14", QCOM_SMD_RPM_LDOA, 14, &pm8941_pldo, "vdd_l6_l12_l14_l15" }, { "l15", QCOM_SMD_RPM_LDOA, 15, &pm8941_pldo, "vdd_l6_l12_l14_l15" }, { "l16", QCOM_SMD_RPM_LDOA, 16, &pm8941_pldo, "vdd_l8_l16_l18_l19" }, { "l17", QCOM_SMD_RPM_LDOA, 17, &pm8941_pldo, "vdd_l9_l10_l17_l22" }, { "l18", QCOM_SMD_RPM_LDOA, 18, &pm8941_pldo, "vdd_l8_l16_l18_l19" }, { "l19", QCOM_SMD_RPM_LDOA, 19, &pm8941_pldo, "vdd_l8_l16_l18_l19" }, { "l20", QCOM_SMD_RPM_LDOA, 20, &pm8941_pldo, "vdd_l13_l20_l23_l24" }, { "l21", QCOM_SMD_RPM_LDOA, 21, &pm8941_pldo, "vdd_l21" }, { "l22", QCOM_SMD_RPM_LDOA, 22, &pm8941_pldo, "vdd_l9_l10_l17_l22" }, { "l23", QCOM_SMD_RPM_LDOA, 23, &pm8941_pldo, "vdd_l13_l20_l23_l24" }, { "l24", QCOM_SMD_RPM_LDOA, 24, &pm8941_pldo, "vdd_l13_l20_l23_l24" }, { "lvs1", QCOM_SMD_RPM_VSA, 1, &pm8941_switch, "vdd_l2_lvs1_2_3" }, { "lvs2", QCOM_SMD_RPM_VSA, 2, &pm8941_switch, "vdd_l2_lvs1_2_3" }, { "lvs3", QCOM_SMD_RPM_VSA, 3, &pm8941_switch, "vdd_l2_lvs1_2_3" }, { "5vs1", QCOM_SMD_RPM_VSA, 4, &pm8941_switch, "vin_5vs" }, { "5vs2", QCOM_SMD_RPM_VSA, 5, &pm8941_switch, "vin_5vs" }, {} }; static const struct of_device_id rpm_of_match[] = { { .compatible = "qcom,rpm-pm8841-regulators", .data = &rpm_pm8841_regulators }, { .compatible = "qcom,rpm-pm8941-regulators", .data = &rpm_pm8941_regulators }, {} }; MODULE_DEVICE_TABLE(of, rpm_of_match); static int rpm_reg_probe(struct platform_device *pdev) { const struct rpm_regulator_data *reg; const struct of_device_id *match; struct regulator_config config = { }; struct regulator_dev *rdev; struct qcom_rpm_reg *vreg; struct qcom_smd_rpm *rpm; rpm = dev_get_drvdata(pdev->dev.parent); if (!rpm) { dev_err(&pdev->dev, "unable to retrieve handle to rpm\n"); return -ENODEV; } match = of_match_device(rpm_of_match, &pdev->dev); for (reg = match->data; reg->name; reg++) { vreg = devm_kzalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL); if (!vreg) return -ENOMEM; vreg->dev = &pdev->dev; vreg->type = reg->type; vreg->id = reg->id; vreg->rpm = rpm; memcpy(&vreg->desc, reg->desc, sizeof(vreg->desc)); vreg->desc.id = -1; vreg->desc.owner = THIS_MODULE; vreg->desc.type = REGULATOR_VOLTAGE; vreg->desc.name = reg->name; vreg->desc.supply_name = reg->supply; vreg->desc.of_match = reg->name; config.dev = &pdev->dev; config.driver_data = vreg; rdev = devm_regulator_register(&pdev->dev, &vreg->desc, &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s\n", reg->name); return PTR_ERR(rdev); } } return 0; } static struct platform_driver rpm_reg_driver = { .probe = rpm_reg_probe, .driver = { .name = "qcom_rpm_smd_regulator", .of_match_table = rpm_of_match, }, }; static int __init rpm_reg_init(void) { return platform_driver_register(&rpm_reg_driver); } subsys_initcall(rpm_reg_init); static void __exit rpm_reg_exit(void) { platform_driver_unregister(&rpm_reg_driver); } module_exit(rpm_reg_exit) MODULE_DESCRIPTION("Qualcomm RPM regulator driver"); MODULE_LICENSE("GPL v2");