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Commit c41d9fc9 authored by Abhijeet Dharmapurikar's avatar Abhijeet Dharmapurikar Committed by Harry Yang
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power: qcom-charger: add support to detect parallel charger 



Add support to detect presence of parallel charger chip by
requesting a register read via power_supply framework.
If parallel chip is absent then disable parallel charger.

Change-Id: Icfa4a774d344fde4c7d1f4ced772a707be85020d
Signed-off-by: default avatarAshay Jaiswal <ashayj@codeaurora.org>
Signed-off-by: default avatarAbhijeet Dharmapurikar <adharmap@codeaurora.org>
parent 1829fcf5

drivers/power/supply/qcom/battery.c

+24 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 
#define TAPER_END_VOTER			"TAPER_END_VOTER"

#define PL_TAPER_EARLY_BAD_VOTER	"PL_TAPER_EARLY_BAD_VOTER"

#define PARALLEL_PSY_VOTER		"PARALLEL_PSY_VOTER"

#define PL_HW_ABSENT_VOTER		"PL_HW_ABSENT_VOTER"



struct pl_data {

	int			pl_mode;
@@ -44,6 +45,7 @@ struct pl_data { 
	struct votable		*pl_disable_votable;

	struct votable		*pl_awake_votable;

	struct work_struct	status_change_work;

	struct work_struct	pl_disable_forever_work;

	struct delayed_work	pl_taper_work;

	struct power_supply	*main_psy;

	struct power_supply	*pl_psy;
@@ -361,6 +363,15 @@ static int pl_fv_vote_callback(struct votable *votable, void *data, 
	return 0;

}



static void pl_disable_forever_work(struct work_struct *work)

{

	struct pl_data *chip = container_of(work,

			struct pl_data, pl_disable_forever_work);



	/* Disable Parallel charger forever */

	vote(chip->pl_disable_votable, PL_HW_ABSENT_VOTER, true, 0);

}



static int pl_disable_vote_callback(struct votable *votable,

		void *data, int pl_disable, const char *client)

{
@@ -372,6 +383,18 @@ static int pl_disable_vote_callback(struct votable *votable, 
	chip->taper_pct = 100;



	if (!pl_disable) { /* enable */

		rc = power_supply_get_property(chip->pl_psy,

				POWER_SUPPLY_PROP_CHARGE_TYPE, &pval);

		if (rc == -ENODEV) {

			/*

			 * -ENODEV is returned only if parallel chip

			 * is not present in the system.

			 * Disable parallel charger forever.

			 */

			schedule_work(&chip->pl_disable_forever_work);

			return rc;

		}



		rerun_election(chip->fv_votable);

		rerun_election(chip->fcc_votable);

		/*
@@ -697,6 +720,7 @@ static int pl_init(void) 


	INIT_WORK(&chip->status_change_work, status_change_work);

	INIT_DELAYED_WORK(&chip->pl_taper_work, pl_taper_work);

	INIT_WORK(&chip->pl_disable_forever_work, pl_disable_forever_work);



	rc = pl_register_notifier(chip);

	if (rc < 0) {