/*
* Copyright (c) 2014, 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/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/qcom_rpm.h>
#include <dt-bindings/mfd/qcom-rpm.h>
#define MAX_REQUEST_LEN 2
struct request_member {
int word;
unsigned int mask;
int shift;
};
struct rpm_reg_parts {
struct request_member mV; /* used if voltage is in mV */
struct request_member uV; /* used if voltage is in uV */
struct request_member ip; /* peak current in mA */
struct request_member pd; /* pull down enable */
struct request_member ia; /* average current in mA */
struct request_member fm; /* force mode */
struct request_member pm; /* power mode */
struct request_member pc; /* pin control */
struct request_member pf; /* pin function */
struct request_member enable_state; /* NCP and switch */
struct request_member comp_mode; /* NCP */
struct request_member freq; /* frequency: NCP and SMPS */
struct request_member freq_clk_src; /* clock source: SMPS */
struct request_member hpm; /* switch: control OCP and SS */
int request_len;
};
#define FORCE_MODE_IS_2_BITS(reg) \
(((reg)->parts->fm.mask >> (reg)->parts->fm.shift) == 3)
struct qcom_rpm_reg {
struct qcom_rpm *rpm;
struct mutex lock;
struct device *dev;
struct regulator_desc desc;
const struct rpm_reg_parts *parts;
int resource;
u32 val[MAX_REQUEST_LEN];
int uV;
int is_enabled;
bool supports_force_mode_auto;
bool supports_force_mode_bypass;
};
static const struct rpm_reg_parts rpm8660_ldo_parts = {
.request_len = 2,
.mV = { 0, 0x00000FFF, 0 },
.ip = { 0, 0x00FFF000, 12 },
.fm = { 0, 0x03000000, 24 },
.pc = { 0, 0x3C000000, 26 },
.pf = { 0, 0xC0000000, 30 },
.pd = { 1, 0x00000001, 0 },
.ia = { 1, 0x00001FFE, 1 },
};
static const struct rpm_reg_parts rpm8660_smps_parts = {
.request_len = 2,
.mV = { 0, 0x00000FFF, 0 },
.ip = { 0, 0x00FFF000, 12 },
.fm = { 0, 0x03000000, 24 },
.pc = { 0, 0x3C000000, 26 },
.pf = { 0, 0xC0000000, 30 },
.pd = { 1, 0x00000001, 0 },
.ia = { 1, 0x00001FFE, 1 },
.freq = { 1, 0x001FE000, 13 },
.freq_clk_src = { 1, 0x00600000, 21 },
};
static const struct rpm_reg_parts rpm8660_switch_parts = {
.request_len = 1,
.enable_state = { 0, 0x00000001, 0 },
.pd = { 0, 0x00000002, 1 },
.pc = { 0, 0x0000003C, 2 },
.pf = { 0, 0x000000C0, 6 },
.hpm = { 0, 0x00000300, 8 },
};
static const struct rpm_reg_parts rpm8660_ncp_parts = {
.request_len = 1,
.mV = { 0, 0x00000FFF, 0 },
.enable_state = { 0, 0x00001000, 12 },
.comp_mode = { 0, 0x00002000, 13 },
.freq = { 0, 0x003FC000, 14 },
};
static const struct rpm_reg_parts rpm8960_ldo_parts = {
.request_len = 2,
.uV = { 0, 0x007FFFFF, 0 },
.pd = { 0, 0x00800000, 23 },
.pc = { 0, 0x0F000000, 24 },
.pf = { 0, 0xF0000000, 28 },
.ip = { 1, 0x000003FF, 0 },
.ia = { 1, 0x000FFC00, 10 },
.fm = { 1, 0x00700000, 20 },
};
static const struct rpm_reg_parts rpm8960_smps_parts = {
.request_len = 2,
.uV = { 0, 0x007FFFFF, 0 },
.pd = { 0, 0x00800000, 23 },
.pc = { 0, 0x0F000000, 24 },
.pf = { 0, 0xF0000000, 28 },
.ip = { 1, 0x000003FF, 0 },
.ia = { 1, 0x000FFC00, 10 },
.fm = { 1, 0x00700000, 20 },
.pm = { 1, 0x00800000, 23 },
.freq = { 1, 0x1F000000, 24 },
.freq_clk_src = { 1, 0x60000000, 29 },
};
static const struct rpm_reg_parts rpm8960_switch_parts = {
.request_len = 1,
.enable_state = { 0, 0x00000001, 0 },
.pd = { 0, 0x00000002, 1 },
.pc = { 0, 0x0000003C, 2 },
.pf = { 0, 0x000003C0, 6 },
.hpm = { 0, 0x00000C00, 10 },
};
static const struct rpm_reg_parts rpm8960_ncp_parts = {
.request_len = 1,
.uV = { 0, 0x007FFFFF, 0 },
.enable_state = { 0, 0x00800000, 23 },
.comp_mode = { 0, 0x01000000, 24 },
.freq = { 0, 0x3E000000, 25 },
};
/*
* Physically available PMIC regulator voltage ranges
*/
static const struct regulator_linear_range pldo_ranges[] = {
REGULATOR_LINEAR_RANGE( 750000, 0, 59, 12500),
REGULATOR_LINEAR_RANGE(1500000, 60, 123, 25000),
REGULATOR_LINEAR_RANGE(3100000, 124, 160, 50000),
};
static const struct regulator_linear_range nldo_ranges[] = {
REGULATOR_LINEAR_RANGE( 750000, 0, 63, 12500),
};
static const struct regulator_linear_range nldo1200_ranges[] = {
REGULATOR_LINEAR_RANGE( 375000, 0, 59, 6250),
REGULATOR_LINEAR_RANGE( 750000, 60, 123, 12500),
};
static const struct regulator_linear_range smps_ranges[] = {
REGULATOR_LINEAR_RANGE( 375000, 0, 29, 12500),
REGULATOR_LINEAR_RANGE( 750000, 30, 89, 12500),
REGULATOR_LINEAR_RANGE(1500000, 90, 153, 25000),
};
static const struct regulator_linear_range ftsmps_ranges[] = {
REGULATOR_LINEAR_RANGE( 350000, 0, 6, 50000),
REGULATOR_LINEAR_RANGE( 700000, 7, 63, 12500),
REGULATOR_LINEAR_RANGE(1500000, 64, 100, 50000),
};
static const struct regulator_linear_range smb208_ranges[] = {
REGULATOR_LINEAR_RANGE( 375000, 0, 29, 12500),
REGULATOR_LINEAR_RANGE( 750000, 30, 89, 12500),
REGULATOR_LINEAR_RANGE(1500000, 90, 153, 25000),
REGULATOR_LINEAR_RANGE(3100000, 154, 234, 25000),
};
static const struct regulator_linear_range ncp_ranges[] = {
REGULATOR_LINEAR_RANGE(1500000, 0, 31, 50000),
};
static int rpm_reg_write(struct qcom_rpm_reg *vreg,
const struct request_member *req,
const int value)
{
if (WARN_ON((value << req->shift) & ~req->mask))
return -EINVAL;
vreg->val[req->word] &= ~req->mask;
vreg->val[req->word] |= value << req->shift;
return qcom_rpm_write(vreg->rpm,
vreg->resource,
vreg->val,
vreg->parts->request_len);
}
static int rpm_reg_set_mV_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
const struct rpm_reg_parts *parts = vreg->parts;
const struct request_member *req = &parts->mV;
int ret = 0;
int uV;
if (req->mask == 0)
return -EINVAL;
uV = regulator_list_voltage_linear_range(rdev, selector);
if (uV < 0)
return uV;
mutex_lock(&vreg->lock);
vreg->uV = uV;
if (vreg->is_enabled)
ret = rpm_reg_write(vreg, req, vreg->uV / 1000);
mutex_unlock(&vreg->lock);
return ret;
}
static int rpm_reg_set_uV_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
const struct rpm_reg_parts *parts = vreg->parts;
const struct request_member *req = &parts->uV;
int ret = 0;
int uV;
if (req->mask == 0)
return -EINVAL;
uV = regulator_list_voltage_linear_range(rdev, selector);
if (uV < 0)
return uV;
mutex_lock(&vreg->lock);
vreg->uV = uV;
if (vreg->is_enabled)
ret = rpm_reg_write(vreg, req, vreg->uV);
mutex_unlock(&vreg->lock);
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_mV_enable(struct regulator_dev *rdev)
{
struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
const struct rpm_reg_parts *parts = vreg->parts;
const struct request_member *req = &parts->mV;
int ret;
if (req->mask == 0)
return -EINVAL;
mutex_lock(&vreg->lock);
ret = rpm_reg_write(vreg, req, vreg->uV / 1000);
if (!ret)
vreg->is_enabled = 1;
mutex_unlock(&vreg->lock);
return ret;
}
static int rpm_reg_uV_enable(struct regulator_dev *rdev)
{
struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
const struct rpm_reg_parts *parts = vreg->parts;
const struct request_member *req = &parts->uV;
int ret;
if (req->mask == 0)
return -EINVAL;
mutex_lock(&vreg->lock);
ret = rpm_reg_write(vreg, req, vreg->uV);
if (!ret)
vreg->is_enabled = 1;
mutex_unlock(&vreg->lock);
return ret;
}
static int rpm_reg_switch_enable(struct regulator_dev *rdev)
{
struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
const struct rpm_reg_parts *parts = vreg->parts;
const struct request_member *req = &parts->enable_state;
int ret;
if (req->mask == 0)
return -EINVAL;
mutex_lock(&vreg->lock);
ret = rpm_reg_write(vreg, req, 1);
if (!ret)
vreg->is_enabled = 1;
mutex_unlock(&vreg->lock);
return ret;
}
static int rpm_reg_mV_disable(struct regulator_dev *rdev)
{
struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
const struct rpm_reg_parts *parts = vreg->parts;
const struct request_member *req = &parts->mV;
int ret;
if (req->mask == 0)
return -EINVAL;
mutex_lock(&vreg->lock);
ret = rpm_reg_write(vreg, req, 0);
if (!ret)
vreg->is_enabled = 0;
mutex_unlock(&vreg->lock);
return ret;
}
static int rpm_reg_uV_disable(struct regulator_dev *rdev)
{
struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
const struct rpm_reg_parts *parts = vreg->parts;
const struct request_member *req = &parts->uV;
int ret;
if (req->mask == 0)
return -EINVAL;
mutex_lock(&vreg->lock);
ret = rpm_reg_write(vreg, req, 0);
if (!ret)
vreg->is_enabled = 0;
mutex_unlock(&vreg->lock);
return ret;
}
static int rpm_reg_switch_disable(struct regulator_dev *rdev)
{
struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
const struct rpm_reg_parts *parts = vreg->parts;
const struct request_member *req = &parts->enable_state;
int ret;
if (req->mask == 0)
return -EINVAL;
mutex_lock(&vreg->lock);
ret = rpm_reg_write(vreg, req, 0);
if (!ret)
vreg->is_enabled = 0;
mutex_unlock(&vreg->lock);
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 struct regulator_ops uV_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = rpm_reg_set_uV_sel,
.get_voltage = rpm_reg_get_voltage,
.enable = rpm_reg_uV_enable,
.disable = rpm_reg_uV_disable,
.is_enabled = rpm_reg_is_enabled,
};
static struct regulator_ops mV_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = rpm_reg_set_mV_sel,
.get_voltage = rpm_reg_get_voltage,
.enable = rpm_reg_mV_enable,
.disable = rpm_reg_mV_disable,
.is_enabled = rpm_reg_is_enabled,
};
static struct regulator_ops switch_ops = {
.enable = rpm_reg_switch_enable,
.disable = rpm_reg_switch_disable,
.is_enabled = rpm_reg_is_enabled,
};
/*
* PM8058 regulators
*/
static const struct qcom_rpm_reg pm8058_pldo = {
.desc.linear_ranges = pldo_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
.desc.n_voltages = 161,
.desc.ops = &mV_ops,
.parts = &rpm8660_ldo_parts,
.supports_force_mode_auto = false,
.supports_force_mode_bypass = false,
};
static const struct qcom_rpm_reg pm8058_nldo = {
.desc.linear_ranges = nldo_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
.desc.n_voltages = 64,
.desc.ops = &mV_ops,
.parts = &rpm8660_ldo_parts,
.supports_force_mode_auto = false,
.supports_force_mode_bypass = false,
};
static const struct qcom_rpm_reg pm8058_smps = {
.desc.linear_ranges = smps_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(smps_ranges),
.desc.n_voltages = 154,
.desc.ops = &mV_ops,
.parts = &rpm8660_smps_parts,
.supports_force_mode_auto = false,
.supports_force_mode_bypass = false,
};
static const struct qcom_rpm_reg pm8058_ncp = {
.desc.linear_ranges = ncp_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges),
.desc.n_voltages = 32,
.desc.ops = &mV_ops,
.parts = &rpm8660_ncp_parts,
};
static const struct qcom_rpm_reg pm8058_switch = {
.desc.ops = &switch_ops,
.parts = &rpm8660_switch_parts,
};
/*
* PM8901 regulators
*/
static const struct qcom_rpm_reg pm8901_pldo = {
.desc.linear_ranges = pldo_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
.desc.n_voltages = 161,
.desc.ops = &mV_ops,
.parts = &rpm8660_ldo_parts,
.supports_force_mode_auto = false,
.supports_force_mode_bypass = true,
};
static const struct qcom_rpm_reg pm8901_nldo = {
.desc.linear_ranges = nldo_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
.desc.n_voltages = 64,
.desc.ops = &mV_ops,
.parts = &rpm8660_ldo_parts,
.supports_force_mode_auto = false,
.supports_force_mode_bypass = true,
};
static const struct qcom_rpm_reg pm8901_ftsmps = {
.desc.linear_ranges = ftsmps_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges),
.desc.n_voltages = 101,
.desc.ops = &mV_ops,
.parts = &rpm8660_smps_parts,
.supports_force_mode_auto = true,
.supports_force_mode_bypass = false,
};
static const struct qcom_rpm_reg pm8901_switch = {
.desc.ops = &switch_ops,
.parts = &rpm8660_switch_parts,
};
/*
* PM8921 regulators
*/
static const struct qcom_rpm_reg pm8921_pldo = {
.desc.linear_ranges = pldo_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
.desc.n_voltages = 161,
.desc.ops = &uV_ops,
.parts = &rpm8960_ldo_parts,
.supports_force_mode_auto = false,
.supports_force_mode_bypass = true,
};
static const struct qcom_rpm_reg pm8921_nldo = {
.desc.linear_ranges = nldo_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
.desc.n_voltages = 64,
.desc.ops = &uV_ops,
.parts = &rpm8960_ldo_parts,
.supports_force_mode_auto = false,
.supports_force_mode_bypass = true,
};
static const struct qcom_rpm_reg pm8921_nldo1200 = {
.desc.linear_ranges = nldo1200_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(nldo1200_ranges),
.desc.n_voltages = 124,
.desc.ops = &uV_ops,
.parts = &rpm8960_ldo_parts,
.supports_force_mode_auto = false,
.supports_force_mode_bypass = true,
};
static const struct qcom_rpm_reg pm8921_smps = {
.desc.linear_ranges = smps_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(smps_ranges),
.desc.n_voltages = 154,
.desc.ops = &uV_ops,
.parts = &rpm8960_smps_parts,
.supports_force_mode_auto = true,
.supports_force_mode_bypass = false,
};
static const struct qcom_rpm_reg pm8921_ftsmps = {
.desc.linear_ranges = ftsmps_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges),
.desc.n_voltages = 101,
.desc.ops = &uV_ops,
.parts = &rpm8960_smps_parts,
.supports_force_mode_auto = true,
.supports_force_mode_bypass = false,
};
static const struct qcom_rpm_reg pm8921_ncp = {
.desc.linear_ranges = ncp_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges),
.desc.n_voltages = 32,
.desc.ops = &uV_ops,
.parts = &rpm8960_ncp_parts,
};
static const struct qcom_rpm_reg pm8921_switch = {
.desc.ops = &switch_ops,
.parts = &rpm8960_switch_parts,
};
static const struct qcom_rpm_reg smb208_smps = {
.desc.linear_ranges = smb208_ranges,
.desc.n_linear_ranges = ARRAY_SIZE(smb208_ranges),
.desc.n_voltages = 235,
.desc.ops = &uV_ops,
.parts = &rpm8960_smps_parts,
.supports_force_mode_auto = false,
.supports_force_mode_bypass = false,
};
static const struct of_device_id rpm_of_match[] = {
{ .compatible = "qcom,rpm-pm8058-pldo", .data = &pm8058_pldo },
{ .compatible = "qcom,rpm-pm8058-nldo", .data = &pm8058_nldo },
{ .compatible = "qcom,rpm-pm8058-smps", .data = &pm8058_smps },
{ .compatible = "qcom,rpm-pm8058-ncp", .data = &pm8058_ncp },
{ .compatible = "qcom,rpm-pm8058-switch", .data = &pm8058_switch },
{ .compatible = "qcom,rpm-pm8901-pldo", .data = &pm8901_pldo },
{ .compatible = "qcom,rpm-pm8901-nldo", .data = &pm8901_nldo },
{ .compatible = "qcom,rpm-pm8901-ftsmps", .data = &pm8901_ftsmps },
{ .compatible = "qcom,rpm-pm8901-switch", .data = &pm8901_switch },
{ .compatible = "qcom,rpm-pm8921-pldo", .data = &pm8921_pldo },
{ .compatible = "qcom,rpm-pm8921-nldo", .data = &pm8921_nldo },
{ .compatible = "qcom,rpm-pm8921-nldo1200", .data = &pm8921_nldo1200 },
{ .compatible = "qcom,rpm-pm8921-smps", .data = &pm8921_smps },
{ .compatible = "qcom,rpm-pm8921-ftsmps", .data = &pm8921_ftsmps },
{ .compatible = "qcom,rpm-pm8921-ncp", .data = &pm8921_ncp },
{ .compatible = "qcom,rpm-pm8921-switch", .data = &pm8921_switch },
{ .compatible = "qcom,rpm-smb208", .data = &smb208_smps },
{ }
};
MODULE_DEVICE_TABLE(of, rpm_of_match);
static int rpm_reg_set(struct qcom_rpm_reg *vreg,
const struct request_member *req,
const int value)
{
if (req->mask == 0 || (value << req->shift) & ~req->mask)
return -EINVAL;
vreg->val[req->word] &= ~req->mask;
vreg->val[req->word] |= value << req->shift;
return 0;
}
static int rpm_reg_of_parse_freq(struct device *dev, struct qcom_rpm_reg *vreg)
{
static const int freq_table[] = {
19200000, 9600000, 6400000, 4800000, 3840000, 3200000, 2740000,
2400000, 2130000, 1920000, 1750000, 1600000, 1480000, 1370000,
1280000, 1200000,
};
const char *key;
u32 freq;
int ret;
int i;
key = "qcom,switch-mode-frequency";
ret = of_property_read_u32(dev->of_node, key, &freq);
if (ret) {
dev_err(dev, "regulator requires %s property\n", key);
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
if (freq == freq_table[i]) {
rpm_reg_set(vreg, &vreg->parts->freq, i + 1);
return 0;
}
}
dev_err(dev, "invalid frequency %d\n", freq);
return -EINVAL;
}
static int rpm_reg_probe(struct platform_device *pdev)
{
struct regulator_init_data *initdata;
const struct qcom_rpm_reg *template;
const struct of_device_id *match;
struct regulator_config config = { };
struct regulator_dev *rdev;
struct qcom_rpm_reg *vreg;
const char *key;
u32 force_mode;
bool pwm;
u32 val;
int ret;
match = of_match_device(rpm_of_match, &pdev->dev);
template = match->data;
vreg = devm_kmalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL);
if (!vreg) {
dev_err(&pdev->dev, "failed to allocate vreg\n");
return -ENOMEM;
}
memcpy(vreg, template, sizeof(*vreg));
mutex_init(&vreg->lock);
vreg->dev = &pdev->dev;
vreg->desc.id = -1;
vreg->desc.owner = THIS_MODULE;
vreg->desc.type = REGULATOR_VOLTAGE;
vreg->desc.name = pdev->dev.of_node->name;
vreg->rpm = dev_get_drvdata(pdev->dev.parent);
if (!vreg->rpm) {
dev_err(&pdev->dev, "unable to retrieve handle to rpm\n");
return -ENODEV;
}
initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
&vreg->desc);
if (!initdata)
return -EINVAL;
key = "reg";
ret = of_property_read_u32(pdev->dev.of_node, key, &val);
if (ret) {
dev_err(&pdev->dev, "failed to read %s\n", key);
return ret;
}
vreg->resource = val;
if ((vreg->parts->uV.mask || vreg->parts->mV.mask) &&
(!initdata->constraints.min_uV || !initdata->constraints.max_uV)) {
dev_err(&pdev->dev, "no voltage specified for regulator\n");
return -EINVAL;
}
key = "bias-pull-down";
if (of_property_read_bool(pdev->dev.of_node, key)) {
ret = rpm_reg_set(vreg, &vreg->parts->pd, 1);
if (ret) {
dev_err(&pdev->dev, "%s is invalid", key);
return ret;
}
}
if (vreg->parts->freq.mask) {
ret = rpm_reg_of_parse_freq(&pdev->dev, vreg);
if (ret < 0)
return ret;
}
if (vreg->parts->pm.mask) {
key = "qcom,power-mode-hysteretic";
pwm = !of_property_read_bool(pdev->dev.of_node, key);
ret = rpm_reg_set(vreg, &vreg->parts->pm, pwm);
if (ret) {
dev_err(&pdev->dev, "failed to set power mode\n");
return ret;
}
}
if (vreg->parts->fm.mask) {
force_mode = -1;
key = "qcom,force-mode";
ret = of_property_read_u32(pdev->dev.of_node, key, &val);
if (ret == -EINVAL) {
val = QCOM_RPM_FORCE_MODE_NONE;
} else if (ret < 0) {
dev_err(&pdev->dev, "failed to read %s\n", key);
return ret;
}
/*
* If force-mode is encoded as 2 bits then the
* possible register values are:
* NONE, LPM, HPM
* otherwise:
* NONE, LPM, AUTO, HPM, BYPASS
*/
switch (val) {
case QCOM_RPM_FORCE_MODE_NONE:
force_mode = 0;
break;
case QCOM_RPM_FORCE_MODE_LPM:
force_mode = 1;
break;
case QCOM_RPM_FORCE_MODE_HPM:
if (FORCE_MODE_IS_2_BITS(vreg))
force_mode = 2;
else
force_mode = 3;
break;
case QCOM_RPM_FORCE_MODE_AUTO:
if (vreg->supports_force_mode_auto)
force_mode = 2;
break;
case QCOM_RPM_FORCE_MODE_BYPASS:
if (vreg->supports_force_mode_bypass)
force_mode = 4;
break;
}
if (force_mode < 0) {
dev_err(&pdev->dev, "invalid force mode\n");
return -EINVAL;
}
ret = rpm_reg_set(vreg, &vreg->parts->fm, force_mode);
if (ret) {
dev_err(&pdev->dev, "failed to set force mode\n");
return ret;
}
}
config.dev = &pdev->dev;
config.init_data = initdata;
config.driver_data = vreg;
config.of_node = pdev->dev.of_node;
rdev = devm_regulator_register(&pdev->dev, &vreg->desc, &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "can't register regulator\n");
return PTR_ERR(rdev);
}
return 0;
}
static struct platform_driver rpm_reg_driver = {
.probe = rpm_reg_probe,
.driver = {
.name = "qcom_rpm_reg",
.of_match_table = of_match_ptr(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");
