regulator: Regulator driver for the Qualcomm RPM
authorBjorn Andersson <bjorn.andersson@sonymobile.com>
Mon, 17 Aug 2015 18:43:59 +0000 (11:43 -0700)
committerMark Brown <broonie@kernel.org>
Mon, 17 Aug 2015 19:52:57 +0000 (12:52 -0700)
Driver for regulators exposed by the Resource Power Manager (RPM) found
in devices based on Qualcomm 8974 and newer platforms.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Acked-by: Andy Gross <agross@codeaurora.org>
Tested-by: Tim Bird <tim.bird@sonymobile.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
drivers/regulator/Kconfig
drivers/regulator/Makefile
drivers/regulator/qcom_smd-regulator.c [new file with mode: 0644]

index bef3bde6971b0425d2632b54d2f1bb447c643ce4..79c3f6dc9feffaabe43277d5f3a073a1c894595c 100644 (file)
@@ -522,6 +522,18 @@ config REGULATOR_QCOM_RPM
          Qualcomm RPM as a module. The module will be named
          "qcom_rpm-regulator".
 
+config REGULATOR_QCOM_SMD_RPM
+       tristate "Qualcomm SMD based RPM regulator driver"
+       depends on QCOM_SMD_RPM
+       help
+         If you say yes to this option, support will be included for the
+         regulators exposed by the Resource Power Manager found in Qualcomm
+         8974 based devices.
+
+         Say M here if you want to include support for the regulators on the
+         Qualcomm RPM as a module. The module will be named
+         "qcom_smd-regulator".
+
 config REGULATOR_QCOM_SPMI
        tristate "Qualcomm SPMI regulator driver"
        depends on SPMI || COMPILE_TEST
index 91bf76267404c9b8a9260dba5e0a0c8a793247e6..abf70a7171b91d4bc28b0e2a5dbc124ac14648ec 100644 (file)
@@ -62,6 +62,7 @@ obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
 obj-$(CONFIG_REGULATOR_MC13XXX_CORE) +=  mc13xxx-regulator-core.o
 obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o
 obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
+obj-$(CONFIG_REGULATOR_QCOM_SMD_RPM) += qcom_smd-regulator.o
 obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o
 obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o
 obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o
diff --git a/drivers/regulator/qcom_smd-regulator.c b/drivers/regulator/qcom_smd-regulator.c
new file mode 100644 (file)
index 0000000..9d093ae
--- /dev/null
@@ -0,0 +1,349 @@
+/*
+ * 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,
+       .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");