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Commit da65e367 authored by Bjorn Andersson's avatar Bjorn Andersson Committed by Mark Brown
Browse files

regulator: Regulator driver for the Qualcomm RPM 



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

Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@sonymobile.com>
Acked-by: default avatarAndy Gross <agross@codeaurora.org>
Tested-by: default avatarTim Bird <tim.bird@sonymobile.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent bc0195aa

drivers/regulator/Kconfig

+12 −0
Original line number Original line Diff line number Diff line
@@ -522,6 +522,18 @@ config REGULATOR_QCOM_RPM 
	  Qualcomm RPM as a module. The module will be named

	  Qualcomm RPM as a module. The module will be named

	  "qcom_rpm-regulator".

	  "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

config REGULATOR_QCOM_SPMI

	tristate "Qualcomm SPMI regulator driver"

	tristate "Qualcomm SPMI regulator driver"

	depends on SPMI || COMPILE_TEST

	depends on SPMI || COMPILE_TEST

drivers/regulator/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -62,6 +62,7 @@ obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o 
obj-$(CONFIG_REGULATOR_MC13XXX_CORE) +=  mc13xxx-regulator-core.o

obj-$(CONFIG_REGULATOR_MC13XXX_CORE) +=  mc13xxx-regulator-core.o

obj-$(CONFIG_REGULATOR_MT6397)	+= mt6397-regulator.o

obj-$(CONFIG_REGULATOR_MT6397)	+= mt6397-regulator.o

obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-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_QCOM_SPMI) += qcom_spmi-regulator.o

obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o

obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o

obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o

obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o

drivers/regulator/qcom_smd-regulator.c

0 → 100644
+349 −0
Original line number Original line Diff line number Diff line 
/*

 * 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");