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linux-sg2042/drivers/regulator/tps6586x-regulator.c

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/*
* Regulator driver for TI TPS6586x
*
* Copyright (C) 2010 Compulab Ltd.
* Author: Mike Rapoport <mike@compulab.co.il>
*
* Based on da903x
* Copyright (C) 2006-2008 Marvell International Ltd.
* Copyright (C) 2008 Compulab Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/slab.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/tps6586x.h>
/* supply control and voltage setting */
#define TPS6586X_SUPPLYENA 0x10
#define TPS6586X_SUPPLYENB 0x11
#define TPS6586X_SUPPLYENC 0x12
#define TPS6586X_SUPPLYEND 0x13
#define TPS6586X_SUPPLYENE 0x14
#define TPS6586X_VCC1 0x20
#define TPS6586X_VCC2 0x21
#define TPS6586X_SM1V1 0x23
#define TPS6586X_SM1V2 0x24
#define TPS6586X_SM1SL 0x25
#define TPS6586X_SM0V1 0x26
#define TPS6586X_SM0V2 0x27
#define TPS6586X_SM0SL 0x28
#define TPS6586X_LDO2AV1 0x29
#define TPS6586X_LDO2AV2 0x2A
#define TPS6586X_LDO2BV1 0x2F
#define TPS6586X_LDO2BV2 0x30
#define TPS6586X_LDO4V1 0x32
#define TPS6586X_LDO4V2 0x33
/* converter settings */
#define TPS6586X_SUPPLYV1 0x41
#define TPS6586X_SUPPLYV2 0x42
#define TPS6586X_SUPPLYV3 0x43
#define TPS6586X_SUPPLYV4 0x44
#define TPS6586X_SUPPLYV5 0x45
#define TPS6586X_SUPPLYV6 0x46
#define TPS6586X_SMODE1 0x47
#define TPS6586X_SMODE2 0x48
struct tps6586x_regulator {
struct regulator_desc desc;
int enable_bit[2];
int enable_reg[2];
};
static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
{
return rdev_get_dev(rdev)->parent;
}
static struct regulator_ops tps6586x_regulator_ops = {
.list_voltage = regulator_list_voltage_table,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
};
static struct regulator_ops tps6586x_sys_regulator_ops = {
};
static const unsigned int tps6586x_ldo0_voltages[] = {
1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
};
static const unsigned int tps6586x_ldo4_voltages[] = {
1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000,
1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000,
2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000,
2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000,
};
static const unsigned int tps6586x_ldo_voltages[] = {
1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
};
static const unsigned int tps6586x_sm2_voltages[] = {
3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000,
3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000,
3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000,
4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000,
};
static const unsigned int tps6586x_dvm_voltages[] = {
725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000,
925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000,
1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
};
#define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \
ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
.desc = { \
.supply_name = _pin_name, \
.name = "REG-" #_id, \
.ops = &tps6586x_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = TPS6586X_ID_##_id, \
.n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \
.volt_table = tps6586x_##vdata##_voltages, \
.owner = THIS_MODULE, \
.enable_reg = TPS6586X_SUPPLY##ereg0, \
.enable_mask = 1 << (ebit0), \
.vsel_reg = TPS6586X_##vreg, \
.vsel_mask = ((1 << (nbits)) - 1) << (shift), \
.apply_reg = (goreg), \
.apply_bit = (gobit), \
}, \
.enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
.enable_bit[0] = (ebit0), \
.enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
.enable_bit[1] = (ebit1),
#define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \
ereg0, ebit0, ereg1, ebit1) \
{ \
TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
ereg0, ebit0, ereg1, ebit1, 0, 0) \
}
#define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \
ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
{ \
TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
}
#define TPS6586X_SYS_REGULATOR() \
{ \
.desc = { \
.supply_name = "sys", \
.name = "REG-SYS", \
.ops = &tps6586x_sys_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = TPS6586X_ID_SYS, \
.owner = THIS_MODULE, \
}, \
}
static struct tps6586x_regulator tps6586x_regulator[] = {
TPS6586X_SYS_REGULATOR(),
TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0),
TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
TPS6586X_LDO(LDO_5, "REG-SYS", ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6),
TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
TPS6586X_LDO(LDO_RTC, "REG-SYS", ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7),
TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7),
TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3,
ENB, 3, TPS6586X_VCC2, BIT(6)),
TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3,
END, 3, TPS6586X_VCC1, BIT(6)),
TPS6586X_DVM(SM_0, "vin-sm0", dvm, SM0V1, 0, 5, ENA, 1,
ENB, 1, TPS6586X_VCC1, BIT(2)),
TPS6586X_DVM(SM_1, "vin-sm1", dvm, SM1V1, 0, 5, ENA, 0,
ENB, 0, TPS6586X_VCC1, BIT(0)),
};
/*
* TPS6586X has 2 enable bits that are OR'ed to determine the actual
* regulator state. Clearing one of this bits allows switching
* regulator on and of with single register write.
*/
static inline int tps6586x_regulator_preinit(struct device *parent,
struct tps6586x_regulator *ri)
{
uint8_t val1, val2;
int ret;
if (ri->enable_reg[0] == ri->enable_reg[1] &&
ri->enable_bit[0] == ri->enable_bit[1])
return 0;
ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
if (ret)
return ret;
ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
if (ret)
return ret;
if (!(val2 & (1 << ri->enable_bit[1])))
return 0;
/*
* The regulator is on, but it's enabled with the bit we don't
* want to use, so we switch the enable bits
*/
if (!(val1 & (1 << ri->enable_bit[0]))) {
ret = tps6586x_set_bits(parent, ri->enable_reg[0],
1 << ri->enable_bit[0]);
if (ret)
return ret;
}
return tps6586x_clr_bits(parent, ri->enable_reg[1],
1 << ri->enable_bit[1]);
}
static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev,
int id, struct regulator_init_data *p)
{
struct device *parent = pdev->dev.parent;
struct tps6586x_settings *setting = p->driver_data;
uint8_t reg;
if (setting == NULL)
return 0;
if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
return 0;
/* only SM0 and SM1 can have the slew rate settings */
switch (id) {
case TPS6586X_ID_SM_0:
reg = TPS6586X_SM0SL;
break;
case TPS6586X_ID_SM_1:
reg = TPS6586X_SM1SL;
break;
default:
dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
return -EINVAL;
}
return tps6586x_write(parent, reg,
setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
}
static inline struct tps6586x_regulator *find_regulator_info(int id)
{
struct tps6586x_regulator *ri;
int i;
for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
ri = &tps6586x_regulator[i];
if (ri->desc.id == id)
return ri;
}
return NULL;
}
#ifdef CONFIG_OF
static struct of_regulator_match tps6586x_matches[] = {
{ .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS },
{ .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },
{ .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },
{ .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },
{ .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 },
{ .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 },
{ .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 },
{ .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 },
{ .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 },
{ .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 },
{ .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 },
{ .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 },
{ .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 },
{ .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 },
{ .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
};
static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
struct platform_device *pdev,
struct of_regulator_match **tps6586x_reg_matches)
{
const unsigned int num = ARRAY_SIZE(tps6586x_matches);
struct device_node *np = pdev->dev.parent->of_node;
struct device_node *regs;
const char *sys_rail = NULL;
unsigned int i;
struct tps6586x_platform_data *pdata;
int err;
regs = of_find_node_by_name(np, "regulators");
if (!regs) {
dev_err(&pdev->dev, "regulator node not found\n");
return NULL;
}
err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num);
if (err < 0) {
dev_err(&pdev->dev, "Regulator match failed, e %d\n", err);
of_node_put(regs);
return NULL;
}
of_node_put(regs);
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
dev_err(&pdev->dev, "Memory alloction failed\n");
return NULL;
}
for (i = 0; i < num; i++) {
int id;
if (!tps6586x_matches[i].init_data)
continue;
pdata->reg_init_data[i] = tps6586x_matches[i].init_data;
id = (int)tps6586x_matches[i].driver_data;
if (id == TPS6586X_ID_SYS)
sys_rail = pdata->reg_init_data[i]->constraints.name;
if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC))
pdata->reg_init_data[i]->supply_regulator = sys_rail;
}
*tps6586x_reg_matches = tps6586x_matches;
return pdata;
}
#else
static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
struct platform_device *pdev,
struct of_regulator_match **tps6586x_reg_matches)
{
*tps6586x_reg_matches = NULL;
return NULL;
}
#endif
static int tps6586x_regulator_probe(struct platform_device *pdev)
{
struct tps6586x_regulator *ri = NULL;
struct regulator_config config = { };
struct regulator_dev **rdev;
struct regulator_init_data *reg_data;
struct tps6586x_platform_data *pdata;
struct of_regulator_match *tps6586x_reg_matches = NULL;
int id;
int err;
dev_dbg(&pdev->dev, "Probing regulator\n");
pdata = dev_get_platdata(pdev->dev.parent);
if ((!pdata) && (pdev->dev.parent->of_node))
pdata = tps6586x_parse_regulator_dt(pdev,
&tps6586x_reg_matches);
if (!pdata) {
dev_err(&pdev->dev, "Platform data not available, exiting\n");
return -ENODEV;
}
rdev = devm_kzalloc(&pdev->dev, TPS6586X_ID_MAX_REGULATOR *
sizeof(*rdev), GFP_KERNEL);
if (!rdev) {
dev_err(&pdev->dev, "Mmemory alloc failed\n");
return -ENOMEM;
}
for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) {
reg_data = pdata->reg_init_data[id];
ri = find_regulator_info(id);
if (!ri) {
dev_err(&pdev->dev, "invalid regulator ID specified\n");
err = -EINVAL;
goto fail;
}
err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
if (err) {
dev_err(&pdev->dev,
"regulator %d preinit failed, e %d\n", id, err);
goto fail;
}
config.dev = pdev->dev.parent;
config.init_data = reg_data;
config.driver_data = ri;
if (tps6586x_reg_matches)
config.of_node = tps6586x_reg_matches[id].of_node;
rdev[id] = regulator_register(&ri->desc, &config);
if (IS_ERR(rdev[id])) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
ri->desc.name);
err = PTR_ERR(rdev[id]);
goto fail;
}
if (reg_data) {
err = tps6586x_regulator_set_slew_rate(pdev, id,
reg_data);
if (err < 0) {
dev_err(&pdev->dev,
"Slew rate config failed, e %d\n", err);
regulator_unregister(rdev[id]);
goto fail;
}
}
}
platform_set_drvdata(pdev, rdev);
return 0;
fail:
while (--id >= 0)
regulator_unregister(rdev[id]);
return err;
}
static int tps6586x_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev **rdev = platform_get_drvdata(pdev);
int id = TPS6586X_ID_MAX_REGULATOR;
while (--id >= 0)
regulator_unregister(rdev[id]);
return 0;
}
static struct platform_driver tps6586x_regulator_driver = {
.driver = {
.name = "tps6586x-pmic",
.owner = THIS_MODULE,
},
.probe = tps6586x_regulator_probe,
.remove = tps6586x_regulator_remove,
};
static int __init tps6586x_regulator_init(void)
{
return platform_driver_register(&tps6586x_regulator_driver);
}
subsys_initcall(tps6586x_regulator_init);
static void __exit tps6586x_regulator_exit(void)
{
platform_driver_unregister(&tps6586x_regulator_driver);
}
module_exit(tps6586x_regulator_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
MODULE_ALIAS("platform:tps6586x-regulator");
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