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Commit 007ee5f6 authored by Andreas Dannenberg's avatar Andreas Dannenberg Committed by Sebastian Reichel
Browse files

power: bq24257: Add various device-specific sysfs properties 

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: default avatarAndreas Dannenberg <dannenberg@ti.com>
Reviewed-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: default avatarSebastian Reichel <sre@kernel.org>
parent 0cfbfde6

drivers/power/bq24257_charger.c

+53 −0
Original line number Diff line number Diff line
@@ -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,

};