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linux/drivers/regulator/bcm590xx-regulator.c

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/*
* Broadcom BCM590xx regulator driver
*
* Copyright 2014 Linaro Limited
* Author: Matt Porter <mporter@linaro.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mfd/bcm590xx.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
/* Register defs */
#define BCM590XX_RFLDOPMCTRL1 0x60
#define BCM590XX_IOSR1PMCTRL1 0x7a
#define BCM590XX_IOSR2PMCTRL1 0x7c
#define BCM590XX_CSRPMCTRL1 0x7e
#define BCM590XX_SDSR1PMCTRL1 0x82
#define BCM590XX_SDSR2PMCTRL1 0x86
#define BCM590XX_MSRPMCTRL1 0x8a
#define BCM590XX_VSRPMCTRL1 0x8e
#define BCM590XX_REG_ENABLE BIT(7)
#define BCM590XX_RFLDOCTRL 0x96
#define BCM590XX_CSRVOUT1 0xc0
#define BCM590XX_LDO_VSEL_MASK GENMASK(5, 3)
#define BCM590XX_SR_VSEL_MASK GENMASK(5, 0)
/* LDO regulator IDs */
#define BCM590XX_REG_RFLDO 0
#define BCM590XX_REG_CAMLDO1 1
#define BCM590XX_REG_CAMLDO2 2
#define BCM590XX_REG_SIMLDO1 3
#define BCM590XX_REG_SIMLDO2 4
#define BCM590XX_REG_SDLDO 5
#define BCM590XX_REG_SDXLDO 6
#define BCM590XX_REG_MMCLDO1 7
#define BCM590XX_REG_MMCLDO2 8
#define BCM590XX_REG_AUDLDO 9
#define BCM590XX_REG_MICLDO 10
#define BCM590XX_REG_USBLDO 11
#define BCM590XX_REG_VIBLDO 12
/* DCDC regulator IDs */
#define BCM590XX_REG_CSR 13
#define BCM590XX_REG_IOSR1 14
#define BCM590XX_REG_IOSR2 15
#define BCM590XX_REG_MSR 16
#define BCM590XX_REG_SDSR1 17
#define BCM590XX_REG_SDSR2 18
#define BCM590XX_REG_VSR 19
#define BCM590XX_NUM_REGS 20
#define BCM590XX_REG_IS_LDO(n) (n < BCM590XX_REG_CSR)
struct bcm590xx_board {
struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS];
};
/* LDO group A: supported voltages in microvolts */
static const unsigned int ldo_a_table[] = {
1200000, 1800000, 2500000, 2700000, 2800000,
2900000, 3000000, 3300000,
};
/* LDO group C: supported voltages in microvolts */
static const unsigned int ldo_c_table[] = {
3100000, 1800000, 2500000, 2700000, 2800000,
2900000, 3000000, 3300000,
};
/* DCDC group CSR: supported voltages in microvolts */
static const struct regulator_linear_range dcdc_csr_ranges[] = {
REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
};
/* DCDC group IOSR1: supported voltages in microvolts */
static const struct regulator_linear_range dcdc_iosr1_ranges[] = {
REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
};
/* DCDC group SDSR1: supported voltages in microvolts */
static const struct regulator_linear_range dcdc_sdsr1_ranges[] = {
REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
};
struct bcm590xx_info {
const char *name;
const char *vin_name;
u8 n_voltages;
const unsigned int *volt_table;
u8 n_linear_ranges;
const struct regulator_linear_range *linear_ranges;
};
#define BCM590XX_REG_TABLE(_name, _table) \
{ \
.name = #_name, \
.n_voltages = ARRAY_SIZE(_table), \
.volt_table = _table, \
}
#define BCM590XX_REG_RANGES(_name, _ranges) \
{ \
.name = #_name, \
.n_linear_ranges = ARRAY_SIZE(_ranges), \
.linear_ranges = _ranges, \
}
static struct bcm590xx_info bcm590xx_regs[] = {
BCM590XX_REG_TABLE(rfldo, ldo_a_table),
BCM590XX_REG_TABLE(camldo1, ldo_c_table),
BCM590XX_REG_TABLE(camldo2, ldo_c_table),
BCM590XX_REG_TABLE(simldo1, ldo_a_table),
BCM590XX_REG_TABLE(simldo2, ldo_a_table),
BCM590XX_REG_TABLE(sdldo, ldo_c_table),
BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
BCM590XX_REG_TABLE(audldo, ldo_a_table),
BCM590XX_REG_TABLE(micldo, ldo_a_table),
BCM590XX_REG_TABLE(usbldo, ldo_a_table),
BCM590XX_REG_TABLE(vibldo, ldo_c_table),
BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
};
struct bcm590xx_reg {
struct regulator_desc *desc;
struct bcm590xx *mfd;
struct bcm590xx_info **info;
};
static int bcm590xx_get_vsel_register(int id)
{
if (BCM590XX_REG_IS_LDO(id))
return BCM590XX_RFLDOCTRL + id;
else
return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
}
static int bcm590xx_get_enable_register(int id)
{
int reg = 0;
if (BCM590XX_REG_IS_LDO(id))
reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
else
switch (id) {
case BCM590XX_REG_CSR:
reg = BCM590XX_CSRPMCTRL1;
break;
case BCM590XX_REG_IOSR1:
reg = BCM590XX_IOSR1PMCTRL1;
break;
case BCM590XX_REG_IOSR2:
reg = BCM590XX_IOSR2PMCTRL1;
break;
case BCM590XX_REG_MSR:
reg = BCM590XX_MSRPMCTRL1;
break;
case BCM590XX_REG_SDSR1:
reg = BCM590XX_SDSR1PMCTRL1;
break;
case BCM590XX_REG_SDSR2:
reg = BCM590XX_SDSR2PMCTRL1;
break;
};
return reg;
}
static struct regulator_ops bcm590xx_ops_ldo = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_iterate,
};
static struct regulator_ops bcm590xx_ops_dcdc = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
};
#define BCM590XX_MATCH(_name, _id) \
{ \
.name = #_name, \
.driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \
}
static struct of_regulator_match bcm590xx_matches[] = {
BCM590XX_MATCH(rfldo, RFLDO),
BCM590XX_MATCH(camldo1, CAMLDO1),
BCM590XX_MATCH(camldo2, CAMLDO2),
BCM590XX_MATCH(simldo1, SIMLDO1),
BCM590XX_MATCH(simldo2, SIMLDO2),
BCM590XX_MATCH(sdldo, SDLDO),
BCM590XX_MATCH(sdxldo, SDXLDO),
BCM590XX_MATCH(mmcldo1, MMCLDO1),
BCM590XX_MATCH(mmcldo2, MMCLDO2),
BCM590XX_MATCH(audldo, AUDLDO),
BCM590XX_MATCH(micldo, MICLDO),
BCM590XX_MATCH(usbldo, USBLDO),
BCM590XX_MATCH(vibldo, VIBLDO),
BCM590XX_MATCH(csr, CSR),
BCM590XX_MATCH(iosr1, IOSR1),
BCM590XX_MATCH(iosr2, IOSR2),
BCM590XX_MATCH(msr, MSR),
BCM590XX_MATCH(sdsr1, SDSR1),
BCM590XX_MATCH(sdsr2, SDSR2),
BCM590XX_MATCH(vsr, VSR),
};
static struct bcm590xx_board *bcm590xx_parse_dt_reg_data(
struct platform_device *pdev,
struct of_regulator_match **bcm590xx_reg_matches)
{
struct bcm590xx_board *data;
struct device_node *np = pdev->dev.parent->of_node;
struct device_node *regulators;
struct of_regulator_match *matches = bcm590xx_matches;
int count = ARRAY_SIZE(bcm590xx_matches);
int idx = 0;
int ret;
if (!np) {
dev_err(&pdev->dev, "of node not found\n");
return NULL;
}
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
dev_err(&pdev->dev, "failed to allocate regulator board data\n");
return NULL;
}
np = of_node_get(np);
regulators = of_get_child_by_name(np, "regulators");
if (!regulators) {
dev_warn(&pdev->dev, "regulator node not found\n");
return NULL;
}
ret = of_regulator_match(&pdev->dev, regulators, matches, count);
of_node_put(regulators);
if (ret < 0) {
dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
ret);
return NULL;
}
*bcm590xx_reg_matches = matches;
for (idx = 0; idx < count; idx++) {
if (!matches[idx].init_data || !matches[idx].of_node)
continue;
data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data;
}
return data;
}
static int bcm590xx_probe(struct platform_device *pdev)
{
struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
struct bcm590xx_board *pmu_data = NULL;
struct bcm590xx_reg *pmu;
struct regulator_config config = { };
struct bcm590xx_info *info;
struct regulator_init_data *reg_data;
struct regulator_dev *rdev;
struct of_regulator_match *bcm590xx_reg_matches = NULL;
int i;
pmu_data = bcm590xx_parse_dt_reg_data(pdev,
&bcm590xx_reg_matches);
pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
if (!pmu) {
dev_err(&pdev->dev, "Memory allocation failed for pmu\n");
return -ENOMEM;
}
pmu->mfd = bcm590xx;
platform_set_drvdata(pdev, pmu);
pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
sizeof(struct regulator_desc), GFP_KERNEL);
if (!pmu->desc) {
dev_err(&pdev->dev, "Memory alloc fails for desc\n");
return -ENOMEM;
}
pmu->info = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
sizeof(struct bcm590xx_info *), GFP_KERNEL);
if (!pmu->info) {
dev_err(&pdev->dev, "Memory alloc fails for info\n");
return -ENOMEM;
}
info = bcm590xx_regs;
for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
if (pmu_data)
reg_data = pmu_data->bcm590xx_pmu_init_data[i];
else
reg_data = NULL;
/* Register the regulators */
pmu->info[i] = info;
pmu->desc[i].name = info->name;
pmu->desc[i].supply_name = info->vin_name;
pmu->desc[i].id = i;
pmu->desc[i].volt_table = info->volt_table;
pmu->desc[i].n_voltages = info->n_voltages;
pmu->desc[i].linear_ranges = info->linear_ranges;
pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
if (BCM590XX_REG_IS_LDO(i)) {
pmu->desc[i].ops = &bcm590xx_ops_ldo;
pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
} else {
pmu->desc[i].ops = &bcm590xx_ops_dcdc;
pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
}
pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
pmu->desc[i].enable_is_inverted = true;
pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
pmu->desc[i].type = REGULATOR_VOLTAGE;
pmu->desc[i].owner = THIS_MODULE;
config.dev = bcm590xx->dev;
config.init_data = reg_data;
config.driver_data = pmu;
config.regmap = bcm590xx->regmap;
if (bcm590xx_reg_matches)
config.of_node = bcm590xx_reg_matches[i].of_node;
rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
&config);
if (IS_ERR(rdev)) {
dev_err(bcm590xx->dev,
"failed to register %s regulator\n",
pdev->name);
return PTR_ERR(rdev);
}
}
return 0;
}
static struct platform_driver bcm590xx_regulator_driver = {
.driver = {
.name = "bcm590xx-vregs",
.owner = THIS_MODULE,
},
.probe = bcm590xx_probe,
};
module_platform_driver(bcm590xx_regulator_driver);
MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:bcm590xx-vregs");
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