Commit f70d5428 authored Mar 09, 2015 by Subbaraman Narayanamurthy Committed by Xiaozhe Shi Mar 16, 2015

power: qpnp-fg: retrieve the cycle counter from FG SRAM when device boots



Cycle counter is stored in fuel gauge (FG) SRAM and it will be
updated based on the specified low and high SOC thresholds. When
the device restarts, cycle counter variable would get reset to
zero. However it should be updated with the real value stored in
FG SRAM as it will be retained until the battery is removed.

CRs-Fixed: 805418
Change-Id: Id348dac5b8cd861e964f3206c764efa2b32c3a1d
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>

parent 09efd825

drivers/power/qpnp-fg.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -3864,6 +3864,15 @@ static int fg_hw_init(struct fg_chip *chip)
		data[0] = KI_COEFF_PRED_FULL_4_0_LSB;
		data[1] = KI_COEFF_PRED_FULL_4_0_MSB;
		fg_mem_write(chip, data, KI_COEFF_PRED_FULL_ADDR, 2, 2, 0);
		/* Read the cycle counter back from FG SRAM */
		if (chip->cyc_ctr_en) {
		rc = fg_mem_read(chip, data, BATT_CYCLE_NUMBER_REG, 2,
		BATT_CYCLE_OFFSET, 0);
		if (rc)
		pr_err("Failed to read BATT_CYCLE_NUMBER rc: %d\n", rc);
		else
		chip->cycle_counter = data[0] \| data[1] << 8;
		}

		esr_value = ESR_DEFAULT_VALUE;
		rc = fg_mem_write(chip, (u8 *)&esr_value, MAXRSCHANGE_REG, 8,