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Commit d8d82b1b authored by Abhijeet Dharmapurikar's avatar Abhijeet Dharmapurikar Committed by Harry Yang
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qcom: smb138x: Average 10 die temperature samples 



Averaging 10 die temperature samples reduces error caused by
a trim issue.

Change-Id: Ie0b9477c121df92544280b8e322c2205c680f6eb
Signed-off-by: default avatarAbhijeet Dharmapurikar <adharmap@codeaurora.org>
parent e9fd08d2

drivers/power/supply/qcom/smb138x-charger.c

+25 −2
Original line number Diff line number Diff line
@@ -44,6 +44,8 @@ 
#define SMB2CHG_DC_TM_SREFGEN		(DCIN_BASE + 0xE2)

#define STACKED_DIODE_EN_BIT		BIT(2)



#define TDIE_AVG_COUNT	10



enum {

	OOB_COMP_WA_BIT = BIT(0),

};
@@ -118,6 +120,27 @@ irqreturn_t smb138x_handle_slave_chg_state_change(int irq, void *data) 
	return IRQ_HANDLED;

}



static int smb138x_get_prop_charger_temp(struct smb138x *chip,

				 union power_supply_propval *val)

{

	union power_supply_propval pval;

	int rc = 0, avg = 0, i;

	struct smb_charger *chg = &chip->chg;



	for (i = 0; i < TDIE_AVG_COUNT; i++) {

		pval.intval = 0;

		rc = smblib_get_prop_charger_temp(chg, &pval);

		if (rc < 0) {

			pr_err("Couldnt read chg temp at %dth iteration rc = %d\n",

					i + 1, rc);

			return rc;

		}

		avg += pval.intval;

	}

	val->intval = avg / TDIE_AVG_COUNT;

	return rc;

}



static int smb138x_parse_dt(struct smb138x *chip)

{

	struct smb_charger *chg = &chip->chg;
@@ -343,7 +366,7 @@ static int smb138x_batt_get_prop(struct power_supply *psy, 
		rc = smblib_get_prop_batt_capacity(chg, val);

		break;

	case POWER_SUPPLY_PROP_CHARGER_TEMP:

		rc = smblib_get_prop_charger_temp(chg, val);

		rc = smb138x_get_prop_charger_temp(chip, val);

		break;

	case POWER_SUPPLY_PROP_CHARGER_TEMP_MAX:

		rc = smblib_get_prop_charger_temp_max(chg, val);
@@ -547,7 +570,7 @@ static int smb138x_parallel_get_prop(struct power_supply *psy, 
		rc = smblib_get_prop_slave_current_now(chg, val);

		break;

	case POWER_SUPPLY_PROP_CHARGER_TEMP:

		rc = smblib_get_prop_charger_temp(chg, val);

		rc = smb138x_get_prop_charger_temp(chip, val);

		break;

	case POWER_SUPPLY_PROP_CHARGER_TEMP_MAX:

		rc = smblib_get_prop_charger_temp_max(chg, val);