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Commit 5c6aadee authored by Anirudh Ghayal's avatar Anirudh Ghayal Committed by Abhijeet Dharmapurikar
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power: qpnp-smbcharger: Reset the OTG over-current state for SCHG LITE 



OTG remains disabled on SCHG LITE if a over-current condition is hit.
Re-enable OTG by resetting the OTG_EN bit.

Change-Id: Ie8ddce2f5d00d90cd1acd468f64196bec64fa53b
Signed-off-by: default avatarAnirudh Ghayal <aghayal@codeaurora.org>
parent c94f04c2

drivers/power/qpnp-smbcharger.c

+28 −6
Original line number Diff line number Diff line
@@ -4617,6 +4617,24 @@ out: 
	return IRQ_HANDLED;

}



static int otg_oc_reset(struct smbchg_chip *chip)

{

	int rc;



	rc = smbchg_masked_write(chip, chip->bat_if_base + CMD_CHG_REG,

						OTG_EN_BIT, 0);

	if (rc)

		pr_err("Failed to disable OTG rc=%d\n", rc);



	msleep(20);

	rc = smbchg_masked_write(chip, chip->bat_if_base + CMD_CHG_REG,

						OTG_EN_BIT, OTG_EN_BIT);

	if (rc)

		pr_err("Failed to re-enable OTG rc=%d\n", rc);



	return rc;

}



/**

 * otg_oc_handler() - called when the usb otg goes over current

 */
@@ -4624,13 +4642,19 @@ out: 
#define OTG_OC_RETRY_DELAY_US		50000

static irqreturn_t otg_oc_handler(int irq, void *_chip)

{

	int rc;

	struct smbchg_chip *chip = _chip;

	s64 elapsed_us = ktime_us_delta(ktime_get(), chip->otg_enable_time);



	pr_smb(PR_INTERRUPT, "triggered\n");



	if (chip->schg_version == QPNP_SCHG_LITE)

	if (chip->schg_version == QPNP_SCHG_LITE) {

		pr_smb(PR_STATUS, "Clear OTG-OC by enable/disable OTG\n");

		rc = otg_oc_reset(chip);

		if (rc)

			pr_err("Failed to reset OTG OC state rc=%d\n", rc);

		return IRQ_HANDLED;

	}



	if (elapsed_us > OTG_OC_RETRY_DELAY_US)

		chip->otg_retries = 0;
@@ -4648,11 +4672,9 @@ static irqreturn_t otg_oc_handler(int irq, void *_chip) 
		pr_smb(PR_STATUS,

			"Retrying OTG enable. Try #%d, elapsed_us %lld\n",

						chip->otg_retries, elapsed_us);

		smbchg_masked_write(chip, chip->bat_if_base + CMD_CHG_REG,

							OTG_EN_BIT, 0);

		msleep(20);

		smbchg_masked_write(chip, chip->bat_if_base + CMD_CHG_REG,

							OTG_EN_BIT, OTG_EN_BIT);

		rc = otg_oc_reset(chip);

		if (rc)

			pr_err("Failed to reset OTG OC state rc=%d\n", rc);

		chip->otg_enable_time = ktime_get();

	}

	return IRQ_HANDLED;