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Commit bbf9c0b8 authored by Xiaozhe Shi's avatar Xiaozhe Shi
Browse files

power: qpnp-fg: report zero soc immediately when empty 



The empty soc interrupt is a voltage based interrupt that triggers
whenever the battery voltage is below a programmed threshold. This is
intended to be a last line of defense in case the soc count is
inaccurate.

In order to prevent UVLOs, immediately report zero soc whenever the empty
soc is raised.

CRs-Fixed: 756489
Change-Id: Ib3c8cc06efa1a834704fc166a393e9959ed01f0e
Signed-off-by: default avatarXiaozhe Shi <xiaozhes@codeaurora.org>
parent de4cd7bb

drivers/power/qpnp-fg.c

+29 −3
Original line number Diff line number Diff line
@@ -943,6 +943,27 @@ out: 
	return rc;

}



#define SOC_EMPTY	BIT(3)

static bool fg_is_batt_empty(struct fg_chip *chip)

{

	u8 fg_soc_sts;

	int rc;



	rc = fg_read(chip, &fg_soc_sts,

				 INT_RT_STS(chip->soc_base), 1);

	if (rc) {

		pr_err("spmi read failed: addr=%03X, rc=%d\n",

				INT_RT_STS(chip->soc_base), rc);

		return false;

	}



	if (fg_debug_mask & FG_IRQS)

		pr_info("fg soc sts 0x%x\n", fg_soc_sts);



	return (fg_soc_sts & SOC_EMPTY) != 0;

}



#define EMPTY_CAPACITY		0

#define DEFAULT_CAPACITY	50

#define MISSING_CAPACITY	100

static int get_prop_capacity(struct fg_chip *chip)
@@ -954,7 +975,12 @@ static int get_prop_capacity(struct fg_chip *chip) 
		return MISSING_CAPACITY;

	if (!chip->profile_loaded && !chip->use_otp_profile)

		return DEFAULT_CAPACITY;



	if (fg_is_batt_empty(chip)) {

		if (fg_debug_mask & FG_POWER_SUPPLY)

			pr_info_ratelimited("capacity: %d, EMPTY\n",

					EMPTY_CAPACITY);

		return EMPTY_CAPACITY;

	}

	while (tries < MAX_TRIES_SOC) {

		rc = fg_read(chip, cap,

				chip->soc_base + SOC_MONOTONIC_SOC, 2);