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Commit f434efd4 authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
Browse files

power: qpnp-fg-gen4: Add maintenance charging support 



Maintenance charging is to show the battery state of charge (SOC)
monotonically for a better user experience by not allowing it to
drop by a big margin when there is a discharging post charge
termination and SOC is held at 100%. Add support for it.

Change-Id: Ia85b7b739eb5372f82fd273462702f8445ef7d28
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 4d716fff

drivers/power/supply/qcom/qpnp-fg-gen4.c

+50 −0
Original line number Diff line number Diff line
@@ -1103,6 +1103,52 @@ static void get_batt_psy_props(struct fg_dev *fg) 
	}

}



static int fg_gen4_update_maint_soc(struct fg_dev *fg)

{

	struct fg_gen4_chip *chip = container_of(fg, struct fg_gen4_chip, fg);

	int rc = 0, msoc;



	if (!chip->dt.linearize_soc)

		return 0;



	mutex_lock(&fg->charge_full_lock);

	if (fg->delta_soc <= 0)

		goto out;



	rc = fg_get_msoc(fg, &msoc);

	if (rc < 0) {

		pr_err("Error in getting msoc, rc=%d\n", rc);

		goto out;

	}



	if (msoc > fg->maint_soc) {

		/*

		 * When the monotonic SOC goes above maintenance SOC, we should

		 * stop showing the maintenance SOC.

		 */

		fg->delta_soc = 0;

		fg->maint_soc = 0;

	} else if (fg->maint_soc && msoc <= fg->last_msoc) {

		/* MSOC is decreasing. Decrease maintenance SOC as well */

		fg->maint_soc -= 1;

		if (!(msoc % 10)) {

			/*

			 * Reduce the maintenance SOC additionally by 1 whenever

			 * it crosses a SOC multiple of 10.

			 */

			fg->maint_soc -= 1;

			fg->delta_soc -= 1;

		}

	}



	fg_dbg(fg, FG_STATUS, "msoc: %d last_msoc: %d maint_soc: %d delta_soc: %d\n",

		msoc, fg->last_msoc, fg->maint_soc, fg->delta_soc);

	fg->last_msoc = msoc;

out:

	mutex_unlock(&fg->charge_full_lock);

	return rc;

}



static int fg_gen4_configure_full_soc(struct fg_dev *fg, int bsoc)

{

	int rc;
@@ -1506,6 +1552,10 @@ static irqreturn_t fg_delta_msoc_irq_handler(int irq, void *data) 
	if (rc < 0)

		pr_err("Error in charge_full_update, rc=%d\n", rc);



	rc = fg_gen4_update_maint_soc(fg);

	if (rc < 0)

		pr_err("Error in updating maint_soc, rc=%d\n", rc);



	rc = fg_gen4_adjust_ki_coeff_dischg(fg);

	if (rc < 0)

		pr_err("Error in adjusting ki_coeff_dischg, rc=%d\n", rc);