diff options
Diffstat (limited to 'drivers/regulator/qcom_smd-regulator.c')
| -rw-r--r-- | drivers/regulator/qcom_smd-regulator.c | 350 |
1 files changed, 350 insertions, 0 deletions
diff --git a/drivers/regulator/qcom_smd-regulator.c b/drivers/regulator/qcom_smd-regulator.c new file mode 100644 index 000000000000..9c6167dd2c8b --- /dev/null +++ b/drivers/regulator/qcom_smd-regulator.c @@ -0,0 +1,350 @@ +/* + * 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"); |