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pfuze100: sysfs file to disable SWBST regulator 

add ugly hack because the factory needs to be able to disable the SWBST regulator to reset the charging circuit during tests
eirik/updates-from-linux-fsl
Martin T. H. Sandsmark 2017-06-28 13:57:39 +02:00 committed by Eirik Schultz
parent 9754594671
commit 887170c499
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GPG Key ID: CA85F5BFB83767F3
1 changed files with 72 additions and 1 deletions
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73
drivers/regulator/pfuze100-regulator.c
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@ -82,6 +82,7 @@ struct pfuze_chip {
struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
struct pfuze_regulator *pfuze_regulators;
struct regulator_dev *swbst_reg;
};
static const int pfuze100_swbst[] = {
@ -522,6 +523,65 @@ static int pfuze_identify(struct pfuze_chip *pfuze_chip)
return 0;
}
static ssize_t swbst_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int state;
struct regulator_dev *swbst_reg;
ssize_t ret;
struct pfuze_chip *pfuze_chip = i2c_get_clientdata(to_i2c_client(dev));
swbst_reg = pfuze_chip->swbst_reg;
if (!swbst_reg)
return -EINVAL;
state = regulator_is_enabled_regmap(swbst_reg);
if (state > 0)
ret = sprintf(buf, "enabled\n");
else if (state == 0)
ret = sprintf(buf, "disabled\n");
else
ret = sprintf(buf, "unknown\n");
return ret;
}
static ssize_t swbst_state_set(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
bool enable;
ssize_t ret;
struct regulator_dev *swbst_reg;
struct pfuze_chip *pfuze_chip = i2c_get_clientdata(to_i2c_client(dev));
swbst_reg = pfuze_chip->swbst_reg;
if (!swbst_reg)
return -EINVAL;
if (sysfs_streq(buf, "enabled\n") || sysfs_streq(buf, "1"))
enable = true;
else if (sysfs_streq(buf, "disabled\n") || sysfs_streq(buf, "0"))
enable = false;
else
return -EINVAL;
if ((enable && regulator_is_enabled_regmap(swbst_reg)) ||
(!enable && !regulator_is_enabled_regmap(swbst_reg))) {
return -EBUSY;
}
ret = enable ? regulator_enable_regmap(swbst_reg) : regulator_disable_regmap(swbst_reg);
if (ret)
return ret;
return len;
}
static DEVICE_ATTR(swbst_state, 0644, swbst_state_show, swbst_state_set);
static const struct regmap_config pfuze_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
@ -645,6 +705,7 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
config.of_node = match_of_node(i);
config.ena_gpio = -EINVAL;
pfuze_chip->regulators[i] =
devm_regulator_register(&client->dev, desc, &config);
if (IS_ERR(pfuze_chip->regulators[i])) {
@ -652,12 +713,23 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
pfuze_chip->pfuze_regulators[i].desc.name);
return PTR_ERR(pfuze_chip->regulators[i]);
}
if (desc->id == PFUZE100_SWBST) {
pfuze_chip->swbst_reg = pfuze_chip->regulators[i];
}
}
if (!pfuze_chip->swbst_reg) {
dev_warn(&client->dev, "Didn't find SWBST\n");
}
if (of_get_property(client->dev.of_node, "fsl,lpsr-mode", NULL))
pfuze_chip->need_restore = true;
if (device_create_file(&client->dev, &dev_attr_swbst_state) < 0) {
dev_err(&client->dev, "Unable to create sysfs file for swbst control\n");
}
return 0;
}
@ -732,7 +804,6 @@ static int pfuze_resume(struct device *dev)
err_ret:
return index;
}
static const struct dev_pm_ops pfuze_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pfuze_suspend, pfuze_resume)
};