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Commit f0a7a7c1 authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy Committed by Gerrit - the friendly Code Review server
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power: qpnp-fg-gen4: Use ESR_ACTUAL for calculating cell impedance 



Cell impedance calculation is currently getting ESR which is used
for TTF calculations. Instead, use ESR_ACTUAL which provides a
stable value as per the hardware recommendation.

Change-Id: I2e32a209287134869f6e4e7e012626e48d64b09a
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 1ec7e9b2

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

+13 −2
Original line number Diff line number Diff line
@@ -791,10 +791,21 @@ static int fg_gen4_get_cell_impedance(struct fg_gen4_chip *chip, int *val) 
{

	struct fg_dev *fg = &chip->fg;

	int rc, esr_uohms, temp, vbat_term_mv, v_delta, rprot_uohms = 0;

	int rslow_uohms;



	rc = fg_get_battery_resistance(fg, &esr_uohms);

	if (rc < 0)

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

	if (rc < 0) {

		pr_err("failed to get ESR_ACT, 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;

	}



	esr_uohms += rslow_uohms;



	if (!chip->dt.five_pin_battery)

		goto out;