Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit fc1a7598 authored by Anirudh Ghayal's avatar Anirudh Ghayal
Browse files

power: qcom-battery: Add sysfs to restrict charging 



Add sysfs files for user applications to restrict
the battery charge current (FCC). The two files in
/sys/class/qcom-battery/ are -

1. restricted_charging: To enable/disable this feature
2. restricted_current: Restricted FCC (uA)

The default restricted_current value is 1A.

CRs-Fixed: 1113761
Change-Id: I23a6796eaa0c41c2e93a52c45f6200326d262e99
Signed-off-by: default avatarAnirudh Ghayal <aghayal@codeaurora.org>
parent 541fe938

drivers/power/supply/qcom/battery.c

+75 −0
Original line number Diff line number Diff line
@@ -35,12 +35,15 @@ 
#define PARALLEL_PSY_VOTER		"PARALLEL_PSY_VOTER"

#define PL_HW_ABSENT_VOTER		"PL_HW_ABSENT_VOTER"

#define PL_VOTER			"PL_VOTER"

#define RESTRICT_CHG_VOTER		"RESTRICT_CHG_VOTER"



struct pl_data {

	int			pl_mode;

	int			slave_pct;

	int			taper_pct;

	int			slave_fcc_ua;

	int			restricted_current;

	bool			restricted_charging_enabled;

	struct votable		*fcc_votable;

	struct votable		*fv_votable;

	struct votable		*pl_disable_votable;
@@ -80,6 +83,8 @@ module_param_named(debug_mask, debug_mask, int, S_IRUSR | S_IWUSR); 
enum {

	VER = 0,

	SLAVE_PCT,

	RESTRICT_CHG_ENABLE,

	RESTRICT_CHG_CURRENT,

};



/*******
@@ -180,10 +185,78 @@ static ssize_t slave_pct_store(struct class *c, struct class_attribute *attr, 
	return count;

}



/**********************

* RESTICTED CHARGIGNG *

***********************/

static ssize_t restrict_chg_show(struct class *c, struct class_attribute *attr,

			char *ubuf)

{

	struct pl_data *chip = container_of(c, struct pl_data,

			qcom_batt_class);



	return snprintf(ubuf, PAGE_SIZE, "%d\n",

			chip->restricted_charging_enabled);

}



static ssize_t restrict_chg_store(struct class *c, struct class_attribute *attr,

			const char *ubuf, size_t count)

{

	struct pl_data *chip = container_of(c, struct pl_data,

			qcom_batt_class);

	unsigned long val;



	if (kstrtoul(ubuf, 10, &val))

		return -EINVAL;



	if (chip->restricted_charging_enabled == !!val)

		goto no_change;



	chip->restricted_charging_enabled = !!val;



	vote(chip->fcc_votable, RESTRICT_CHG_VOTER,

				chip->restricted_charging_enabled,

				chip->restricted_current);



no_change:

	return count;

}



static ssize_t restrict_cur_show(struct class *c, struct class_attribute *attr,

			char *ubuf)

{

	struct pl_data *chip = container_of(c, struct pl_data,

			qcom_batt_class);



	return snprintf(ubuf, PAGE_SIZE, "%d\n", chip->restricted_current);

}



static ssize_t restrict_cur_store(struct class *c, struct class_attribute *attr,

			const char *ubuf, size_t count)

{

	struct pl_data *chip = container_of(c, struct pl_data,

			qcom_batt_class);

	unsigned long val;



	if (kstrtoul(ubuf, 10, &val))

		return -EINVAL;



	chip->restricted_current = val;



	vote(chip->fcc_votable, RESTRICT_CHG_VOTER,

				chip->restricted_charging_enabled,

				chip->restricted_current);



	return count;

}



static struct class_attribute pl_attributes[] = {

	[VER]			= __ATTR_RO(version),

	[SLAVE_PCT]		= __ATTR(parallel_pct, S_IRUGO | S_IWUSR,

					slave_pct_show, slave_pct_store),

	[RESTRICT_CHG_ENABLE]	= __ATTR(restricted_charging, S_IRUGO | S_IWUSR,

					restrict_chg_show, restrict_chg_store),

	[RESTRICT_CHG_CURRENT]	= __ATTR(restricted_current, S_IRUGO | S_IWUSR,

					restrict_cur_show, restrict_cur_store),

	__ATTR_NULL,

};
@@ -750,6 +823,7 @@ static int pl_determine_initial_status(struct pl_data *chip) 
	return 0;

}



#define DEFAULT_RESTRICTED_CURRENT_UA	1000000

static int pl_init(void)

{

	struct pl_data *chip;
@@ -759,6 +833,7 @@ static int pl_init(void) 
	if (!chip)

		return -ENOMEM;

	chip->slave_pct = 50;

	chip->restricted_current = DEFAULT_RESTRICTED_CURRENT_UA;



	chip->pl_ws = wakeup_source_register("qcom-battery");

	if (!chip->pl_ws)