[PATCH v2 07/11] regulator: qcom: smd: Regulator driver for the Qualcomm RPM

bjorn
2015-06-26T21:52:29Z

From: Bjorn Andersson <bjorn.andersson@sonymobile.com>

Driver for regulators exposed by the Resource Power Manager (RPM) found
in devices based on Qualcomm 8974 and newer platforms.

Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---
drivers/regulator/Kconfig | 12 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/qcom_smd-regulator.c | 350 +++++++++++++++++++++++++++++++++
3 files changed, 363 insertions(+)
create mode 100644 drivers/regulator/qcom_smd-regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index bef3bde..876e03e 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -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 MFD_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
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 91bf762..abf70a7 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -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
index 0000000..d1efc8c
--- /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/mfd/qcom-smd-rpm.h>
+#include <dt-bindings/mfd/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");
--
1.9.3 (Apple Git-50)