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Commit 3c288430 authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
Browse files

power: qpnp-fg-gen4: add support to display available power 



Add support to show the available power from battery parameters
through POWER_SUPPLY_PROP_POWER_NOW, POWER_SUPPLY_PROP_POWER_AVG
properties.

Change-Id: Ib13022f0d6acb434190a58e66a502739769322d2
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 041149db

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

+45 −0
Original line number Diff line number Diff line
@@ -904,6 +904,43 @@ static inline void get_esr_meas_current(int curr_ma, u8 *val) 
	*val <<= ESR_PULL_DOWN_IVAL_SHIFT;

}



static int fg_gen4_get_power(struct fg_gen4_chip *chip, int *val, bool average)

{

	struct fg_dev *fg = &chip->fg;

	int rc, v_min, v_pred, esr_uohms, rslow_uohms;

	s64 power;



	rc = fg_get_sram_prop(fg, FG_SRAM_VOLTAGE_PRED, &v_pred);

	if (rc < 0)

		return rc;



	v_min = chip->dt.cutoff_volt_mv * 1000;

	power = (s64)v_min * (v_pred - v_min);



	rc = fg_get_sram_prop(fg, FG_SRAM_ESR, &esr_uohms);

	if (rc < 0) {

		pr_err("failed to get ESR, rc=%d\n", rc);

		return rc;

	}



	rc = fg_get_sram_prop(fg, FG_SRAM_RSLOW, &rslow_uohms);

	if (rc < 0) {

		pr_err("failed to get Rslow, rc=%d\n", rc);

		return rc;

	}



	if (average)

		power = div_s64(power, esr_uohms + rslow_uohms);

	else

		power = div_s64(power, esr_uohms);



	pr_debug("V_min: %d V_pred: %d ESR: %d Rslow: %d power: %lld\n", v_min,

		v_pred, esr_uohms, rslow_uohms, power);



	*val = power;

	return 0;

}



/* ALG callback functions below */



static int fg_gen4_get_ttf_param(void *data, enum ttf_param param, int *val)
@@ -3698,6 +3735,12 @@ static int fg_psy_get_property(struct power_supply *psy, 
	case POWER_SUPPLY_PROP_BATT_AGE_LEVEL:

		pval->intval = chip->batt_age_level;

		break;

	case POWER_SUPPLY_PROP_POWER_NOW:

		rc = fg_gen4_get_power(chip, &pval->intval, false);

		break;

	case POWER_SUPPLY_PROP_POWER_AVG:

		rc = fg_gen4_get_power(chip, &pval->intval, true);

		break;

	default:

		pr_err("unsupported property %d\n", psp);

		rc = -EINVAL;
@@ -3845,6 +3888,8 @@ static enum power_supply_property fg_psy_props[] = { 
	POWER_SUPPLY_PROP_CC_STEP,

	POWER_SUPPLY_PROP_CC_STEP_SEL,

	POWER_SUPPLY_PROP_BATT_AGE_LEVEL,

	POWER_SUPPLY_PROP_POWER_NOW,

	POWER_SUPPLY_PROP_POWER_AVG,

};



static const struct power_supply_desc fg_psy_desc = {