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Commit a86ae35c authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
Browse files

power: qpnp-smbcharger: notify over voltage condition to USB power supply 



There is a requirement to handle over voltage interrupt and
notify it to the USB power supply when the interrupt occurs.
Add support for that.

CRs-Fixed: 789279
Change-Id: Ie8987d404b60cf63ae10f3dae9dc7aba21758014
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 1197f04d

drivers/power/qpnp-smbcharger.c

+61 −0
Original line number Diff line number Diff line
@@ -152,6 +152,7 @@ struct smbchg_chip { 
	bool				sw_esr_pulse_en;

	bool				safety_timer_en;

	bool				aicl_complete;

	bool				usb_ov_det;



	/* jeita and temperature */

	bool				batt_hot;
@@ -180,6 +181,7 @@ struct smbchg_chip { 
	int				power_ok_irq;

	int				dcin_uv_irq;

	int				usbin_uv_irq;

	int				usbin_ov_irq;

	int				src_detect_irq;

	int				otg_fail_irq;

	int				otg_oc_irq;
@@ -3602,7 +3604,11 @@ static irqreturn_t dcin_uv_handler(int irq, void *_chip) 
static void handle_usb_removal(struct smbchg_chip *chip)

{

	struct power_supply *parallel_psy = get_parallel_psy(chip);

	int rc;



	/* Clear the OV detected status set before */

	if (chip->usb_ov_det)

		chip->usb_ov_det = false;

	if (chip->usb_psy) {

		pr_smb(PR_MISC, "setting usb psy type = %d\n",

				POWER_SUPPLY_TYPE_UNKNOWN);
@@ -3612,6 +3618,12 @@ static void handle_usb_removal(struct smbchg_chip *chip) 
				POWER_SUPPLY_TYPE_UNKNOWN);

		power_supply_set_present(chip->usb_psy, chip->usb_present);

		schedule_work(&chip->usb_set_online_work);

		rc = power_supply_set_health_state(chip->usb_psy,

				POWER_SUPPLY_HEALTH_UNKNOWN);

		if (rc)

			pr_smb(PR_STATUS,

				"usb psy does not allow updating prop %d rc = %d\n",

				POWER_SUPPLY_HEALTH_UNKNOWN, rc);

	}

	if (parallel_psy)

		power_supply_set_present(parallel_psy, false);
@@ -3648,6 +3660,15 @@ static void handle_usb_insertion(struct smbchg_chip *chip) 
		pr_smb(PR_MISC, "setting usb psy present = %d\n",

				chip->usb_present);

		power_supply_set_present(chip->usb_psy, chip->usb_present);

		/* Notify the USB psy if OV condition is not present */

		if (!chip->usb_ov_det) {

			rc = power_supply_set_health_state(chip->usb_psy,

					POWER_SUPPLY_HEALTH_GOOD);

			if (rc)

				pr_smb(PR_STATUS,

					"usb psy does not allow updating prop %d rc = %d\n",

					POWER_SUPPLY_HEALTH_GOOD, rc);

		}

		schedule_work(&chip->usb_set_online_work);

		schedule_delayed_work(&chip->hvdcp_det_work,

					msecs_to_jiffies(HVDCP_NOTIFY_MS));
@@ -3662,6 +3683,43 @@ static void handle_usb_insertion(struct smbchg_chip *chip) 
	}

}



/**

 * usbin_ov_handler() - this is called when an overvoltage condition occurs

 * @chip: pointer to smbchg_chip chip

 */

static irqreturn_t usbin_ov_handler(int irq, void *_chip)

{

	struct smbchg_chip *chip = _chip;

	int rc;

	u8 reg;



	rc = smbchg_read(chip, &reg, chip->usb_chgpth_base + RT_STS, 1);

	if (rc < 0) {

		dev_err(chip->dev, "Couldn't read usb rt status rc = %d\n", rc);

		goto out;

	}



	/* OV condition is detected. Notify it to USB psy */

	if (reg & USBIN_OV_BIT) {

		chip->usb_ov_det = true;

		if (chip->usb_psy) {

			rc = power_supply_set_health_state(chip->usb_psy,

					POWER_SUPPLY_HEALTH_OVERVOLTAGE);

			if (rc)

				pr_smb(PR_STATUS,

					"usb psy does not allow updating prop %d rc = %d\n",

					POWER_SUPPLY_HEALTH_OVERVOLTAGE, rc);

		}

	} else {

		chip->usb_ov_det = false;

		/* If USB is present, then handle the USB insertion */

		if (is_usb_present(chip))

			handle_usb_insertion(chip);

	}

out:

	return IRQ_HANDLED;

}



/**

 * usbin_uv_handler() - this is called when USB charger is removed

 * @chip: pointer to smbchg_chip chip
@@ -4656,6 +4714,8 @@ static int smbchg_request_irqs(struct smbchg_chip *chip) 
		case SMBCHG_USB_CHGPTH_SUBTYPE:

			REQUEST_IRQ(chip, spmi_resource, chip->usbin_uv_irq,

				"usbin-uv", usbin_uv_handler, flags, rc);

			REQUEST_IRQ(chip, spmi_resource, chip->usbin_ov_irq,

				"usbin-ov", usbin_ov_handler, flags, rc);

			REQUEST_IRQ(chip, spmi_resource, chip->src_detect_irq,

				"usbin-src-det",

				src_detect_handler, flags, rc);
@@ -4672,6 +4732,7 @@ static int smbchg_request_irqs(struct smbchg_chip *chip) 
				usbid_change_handler,

				(IRQF_TRIGGER_FALLING | IRQF_ONESHOT), rc);

			enable_irq_wake(chip->usbin_uv_irq);

			enable_irq_wake(chip->usbin_ov_irq);

			enable_irq_wake(chip->src_detect_irq);

			enable_irq_wake(chip->otg_fail_irq);

			enable_irq_wake(chip->otg_oc_irq);