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alistair23-linux/drivers/regulator/tps6586x-regulator.c
Laxman Dewangan 7c7fac3058 regulator: tps6586x: add support for input supply 
There is multiple voltage input pins on device which
takes the voltage input for different voltage regulator.
Support to configure the voltage input supplied by
different regulator for each regulators.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-07-13 15:21:18 +01:00

407 lines
11 KiB
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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/slab.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.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 volt_reg;
int volt_shift;
int volt_nbits;
int enable_bit[2];
int enable_reg[2];
/* for DVM regulators */
int go_reg;
int go_bit;
};
static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
{
return rdev_get_dev(rdev)->parent;
}
static int tps6586x_set_voltage_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
struct device *parent = to_tps6586x_dev(rdev);
int ret, val, rid = rdev_get_id(rdev);
uint8_t mask;
val = selector << ri->volt_shift;
mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
ret = tps6586x_update(parent, ri->volt_reg, val, mask);
if (ret)
return ret;
/* Update go bit for DVM regulators */
switch (rid) {
case TPS6586X_ID_LDO_2:
case TPS6586X_ID_LDO_4:
case TPS6586X_ID_SM_0:
case TPS6586X_ID_SM_1:
ret = tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit);
break;
}
return ret;
}
static int tps6586x_get_voltage_sel(struct regulator_dev *rdev)
{
struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
struct device *parent = to_tps6586x_dev(rdev);
uint8_t val, mask;
int ret;
ret = tps6586x_read(parent, ri->volt_reg, &val);
if (ret)
return ret;
mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
val = (val & mask) >> ri->volt_shift;
if (val >= ri->desc.n_voltages)
BUG();
return val;
}
static int tps6586x_regulator_enable(struct regulator_dev *rdev)
{
struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
struct device *parent = to_tps6586x_dev(rdev);
return tps6586x_set_bits(parent, ri->enable_reg[0],
1 << ri->enable_bit[0]);
}
static int tps6586x_regulator_disable(struct regulator_dev *rdev)
{
struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
struct device *parent = to_tps6586x_dev(rdev);
return tps6586x_clr_bits(parent, ri->enable_reg[0],
1 << ri->enable_bit[0]);
}
static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev)
{
struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
struct device *parent = to_tps6586x_dev(rdev);
uint8_t reg_val;
int ret;
ret = tps6586x_read(parent, ri->enable_reg[0], &reg_val);
if (ret)
return ret;
return !!(reg_val & (1 << ri->enable_bit[0]));
}
static struct regulator_ops tps6586x_regulator_ops = {
.list_voltage = regulator_list_voltage_table,
.get_voltage_sel = tps6586x_get_voltage_sel,
.set_voltage_sel = tps6586x_set_voltage_sel,
.is_enabled = tps6586x_regulator_is_enabled,
.enable = tps6586x_regulator_enable,
.disable = tps6586x_regulator_disable,
};
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) \
.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, \
}, \
.volt_reg = TPS6586X_##vreg, \
.volt_shift = (shift), \
.volt_nbits = (nbits), \
.enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
.enable_bit[0] = (ebit0), \
.enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
.enable_bit[1] = (ebit1),
#define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
.go_reg = TPS6586X_##goreg, \
.go_bit = (gobit),
#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) \
}
#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) \
TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
}
static struct tps6586x_regulator tps6586x_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, NULL, 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, NULL, 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, "sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7),
TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3,
ENB, 3, VCC2, 6),
TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3,
END, 3, VCC1, 6),
TPS6586X_DVM(SM_0, "sm0", dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2),
TPS6586X_DVM(SM_1, "sm1", dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 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)
{
struct device *parent = pdev->dev.parent;
struct regulator_init_data *p = pdev->dev.platform_data;
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 (pdev->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;
}
static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
{
struct tps6586x_regulator *ri = NULL;
struct regulator_config config = { };
struct regulator_dev *rdev;
int id = pdev->id;
int err;
dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
ri = find_regulator_info(id);
if (ri == NULL) {
dev_err(&pdev->dev, "invalid regulator ID specified\n");
return -EINVAL;
}
err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
if (err)
return err;
config.dev = pdev->dev.parent;
config.of_node = pdev->dev.of_node;
config.init_data = pdev->dev.platform_data;
config.driver_data = ri;
rdev = regulator_register(&ri->desc, &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
ri->desc.name);
return PTR_ERR(rdev);
}
platform_set_drvdata(pdev, rdev);
return tps6586x_regulator_set_slew_rate(pdev);
}
static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev *rdev = platform_get_drvdata(pdev);
regulator_unregister(rdev);
return 0;
}
static struct platform_driver tps6586x_regulator_driver = {
.driver = {
.name = "tps6586x-regulator",
.owner = THIS_MODULE,
},
.probe = tps6586x_regulator_probe,
.remove = __devexit_p(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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