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regulator: palmas: support for external regulator through control outputs

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Palmas device have control outputs like REGEN1, REGEN2, REGEN3,
SYSEN1 and SYSEN2. These control outputs can be used for controlling
external voltage switches to enabled/disable voltage outputs.

Add support of these control outputs through regulator framework.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Laxman Dewangan 2013-04-17 15:13:12 +05:30 committed by Mark Brown
parent 30590d0480
commit aa07f02793
2 changed files with 89 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

95
drivers/regulator/palmas-regulator.c
View file

@ -165,6 +165,26 @@ static const struct regs_info palmas_regs_info[] = {
.vsel_addr = PALMAS_LDOUSB_VOLTAGE,
.ctrl_addr = PALMAS_LDOUSB_CTRL,
},
{
.name = "REGEN1",
.ctrl_addr = PALMAS_REGEN1_CTRL,
},
{
.name = "REGEN2",
.ctrl_addr = PALMAS_REGEN2_CTRL,
},
{
.name = "REGEN3",
.ctrl_addr = PALMAS_REGEN3_CTRL,
},
{
.name = "SYSEN1",
.ctrl_addr = PALMAS_SYSEN1_CTRL,
},
{
.name = "SYSEN2",
.ctrl_addr = PALMAS_SYSEN2_CTRL,
},
};
#define SMPS_CTRL_MODE_OFF 0x00
@ -422,6 +442,12 @@ static struct regulator_ops palmas_ops_ldo = {
.map_voltage = regulator_map_voltage_linear,
};
static struct regulator_ops palmas_ops_extreg = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
};
/*
* setup the hardware based sleep configuration of the SMPS/LDO regulators
* from the platform data. This is different to the software based control
@ -523,6 +549,28 @@ static int palmas_ldo_init(struct palmas *palmas, int id,
return 0;
}
static int palmas_extreg_init(struct palmas *palmas, int id,
struct palmas_reg_init *reg_init)
{
unsigned int addr;
int ret;
unsigned int val = 0;
addr = palmas_regs_info[id].ctrl_addr;
if (reg_init->mode_sleep)
val = PALMAS_REGEN1_CTRL_MODE_SLEEP;
ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
addr, PALMAS_REGEN1_CTRL_MODE_SLEEP, val);
if (ret < 0) {
dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n",
addr, ret);
return ret;
}
return 0;
}
static struct of_regulator_match palmas_matches[] = {
{ .name = "smps12", },
{ .name = "smps123", },
@ -545,6 +593,11 @@ static struct of_regulator_match palmas_matches[] = {
{ .name = "ldo9", },
{ .name = "ldoln", },
{ .name = "ldousb", },
{ .name = "regen1", },
{ .name = "regen2", },
{ .name = "regen3", },
{ .name = "sysen1", },
{ .name = "sysen2", },
};
static void palmas_dt_to_pdata(struct device *dev,
@ -763,21 +816,34 @@ static int palmas_regulators_probe(struct platform_device *pdev)
/* Register the regulators */
pmic->desc[id].name = palmas_regs_info[id].name;
pmic->desc[id].id = id;
pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
pmic->desc[id].ops = &palmas_ops_ldo;
pmic->desc[id].type = REGULATOR_VOLTAGE;
pmic->desc[id].owner = THIS_MODULE;
pmic->desc[id].min_uV = 900000;
pmic->desc[id].uV_step = 50000;
pmic->desc[id].linear_min_sel = 1;
pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
if (id < PALMAS_REG_REGEN1) {
pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
pmic->desc[id].ops = &palmas_ops_ldo;
pmic->desc[id].min_uV = 900000;
pmic->desc[id].uV_step = 50000;
pmic->desc[id].linear_min_sel = 1;
pmic->desc[id].vsel_reg =
PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
palmas_regs_info[id].vsel_addr);
pmic->desc[id].vsel_mask = PALMAS_LDO1_VOLTAGE_VSEL_MASK;
pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
pmic->desc[id].vsel_mask =
PALMAS_LDO1_VOLTAGE_VSEL_MASK;
pmic->desc[id].enable_reg =
PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
palmas_regs_info[id].ctrl_addr);
pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE;
pmic->desc[id].enable_mask =
PALMAS_LDO1_CTRL_MODE_ACTIVE;
} else {
pmic->desc[id].n_voltages = 1;
pmic->desc[id].ops = &palmas_ops_extreg;
pmic->desc[id].enable_reg =
PALMAS_BASE_TO_REG(PALMAS_RESOURCE_BASE,
palmas_regs_info[id].ctrl_addr);
pmic->desc[id].enable_mask =
PALMAS_REGEN1_CTRL_MODE_ACTIVE;
}
if (pdata)
config.init_data = pdata->reg_data[id];
@ -803,7 +869,12 @@ static int palmas_regulators_probe(struct platform_device *pdev)
if (pdata) {
reg_init = pdata->reg_init[id];
if (reg_init) {
ret = palmas_ldo_init(palmas, id, reg_init);
if (id < PALMAS_REG_REGEN1)
ret = palmas_ldo_init(palmas,
id, reg_init);
else
ret = palmas_extreg_init(palmas,
id, reg_init);
if (ret) {
regulator_unregister(pmic->rdev[id]);
goto err_unregister_regulator;

6
include/linux/mfd/palmas.h
View file

@ -154,6 +154,12 @@ enum palmas_regulators {
PALMAS_REG_LDO9,
PALMAS_REG_LDOLN,
PALMAS_REG_LDOUSB,
/* External regulators */
PALMAS_REG_REGEN1,
PALMAS_REG_REGEN2,
PALMAS_REG_REGEN3,
PALMAS_REG_SYSEN1,
PALMAS_REG_SYSEN2,
/* Total number of regulators */
PALMAS_NUM_REGS,
};