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power: bq24257: Add various device-specific sysfs properties

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This patch adds support for enabling/disabling optional device specific
features through sysfs properties at runtime.

* High-impedance mode enable/disable
* Sysoff enable/disable

Refer to the respective device datasheets for more information:

http://www.ti.com/product/bq24250
http://www.ti.com/product/bq24251
http://www.ti.com/product/bq24257

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Andreas Dannenberg 2015-09-28 17:34:00 -05:00 committed by Sebastian Reichel
parent 0cfbfde65a
commit 007ee5f656
1 changed files with 53 additions and 0 deletions
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53
drivers/power/bq24257_charger.c
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@ -791,12 +791,65 @@ static ssize_t bq24257_show_in_dpm_voltage(struct device *dev,
bq24257_vindpm_map[bq->init_data.vindpm]);
}
static ssize_t bq24257_sysfs_show_enable(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct bq24257_device *bq = power_supply_get_drvdata(psy);
int ret;
if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
ret = bq24257_field_read(bq, F_HZ_MODE);
else if (strcmp(attr->attr.name, "sysoff_enable") == 0)
ret = bq24257_field_read(bq, F_SYSOFF);
else
return -EINVAL;
if (ret < 0)
return ret;
return scnprintf(buf, PAGE_SIZE, "%d\n", ret);
}
static ssize_t bq24257_sysfs_set_enable(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct bq24257_device *bq = power_supply_get_drvdata(psy);
long val;
int ret;
if (kstrtol(buf, 10, &val) < 0)
return -EINVAL;
if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
ret = bq24257_field_write(bq, F_HZ_MODE, (bool)val);
else if (strcmp(attr->attr.name, "sysoff_enable") == 0)
ret = bq24257_field_write(bq, F_SYSOFF, (bool)val);
else
return -EINVAL;
if (ret < 0)
return ret;
return count;
}
static DEVICE_ATTR(ovp_voltage, S_IRUGO, bq24257_show_ovp_voltage, NULL);
static DEVICE_ATTR(in_dpm_voltage, S_IRUGO, bq24257_show_in_dpm_voltage, NULL);
static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
bq24257_sysfs_show_enable, bq24257_sysfs_set_enable);
static DEVICE_ATTR(sysoff_enable, S_IWUSR | S_IRUGO,
bq24257_sysfs_show_enable, bq24257_sysfs_set_enable);
static struct attribute *bq24257_charger_attr[] = {
&dev_attr_ovp_voltage.attr,
&dev_attr_in_dpm_voltage.attr,
&dev_attr_high_impedance_enable.attr,
&dev_attr_sysoff_enable.attr,
NULL,
};