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Commit d8bc42f4 authored by Ashay Jaiswal's avatar Ashay Jaiswal Committed by Guru Das Srinagesh
Browse files

power: smb5: add legacy-cable detection logic 



Charger h/w legacy-cable detection fails if the device is rebooted
with charger connected. Fix this by resetting Type-C state machine
by disabling/enabling TypeC module.

Change-Id: I26e78123f7a60adbeceeaa7acd5dc9b83306b19f
Signed-off-by: default avatarAshay Jaiswal <ashayj@codeaurora.org>
Signed-off-by: default avatarUmang Agrawal <uagrawal@codeaurora.org>
parent 99041e20

drivers/power/supply/qcom/qpnp-smb5.c

+35 −0
Original line number Original line Diff line number Diff line
@@ -1639,7 +1639,42 @@ static int smb5_init_vconn_regulator(struct smb5 *chip) 
 ***************************/

 ***************************/

static int smb5_configure_typec(struct smb_charger *chg)

static int smb5_configure_typec(struct smb_charger *chg)

{

{

	union power_supply_propval pval = {0, };

	int rc;

	int rc;

	u8 val = 0;



	rc = smblib_read(chg, LEGACY_CABLE_STATUS_REG, &val);

	if (rc < 0) {

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

		return rc;

	}



	/*

	 * Across reboot, standard typeC cables get detected as legacy cables

	 * due to VBUS attachment prior to CC attach/dettach. To handle this,

	 * "early_usb_attach" flag is used, which assumes that across reboot,

	 * the cable connected can be standard typeC. However, its jurisdiction

	 * is limited to PD capable designs only. Hence, for non-PD type designs

	 * reset legacy cable detection by disabling/enabling typeC mode.

	 */

	if (chg->pd_not_supported && (val & TYPEC_LEGACY_CABLE_STATUS_BIT)) {

		pval.intval = POWER_SUPPLY_TYPEC_PR_NONE;

		smblib_set_prop_typec_power_role(chg, &pval);

		if (rc < 0) {

			dev_err(chg->dev, "Couldn't disable TYPEC rc=%d\n", rc);

			return rc;

		}



		/* delay before enabling typeC */

		msleep(50);



		pval.intval = POWER_SUPPLY_TYPEC_PR_DUAL;

		smblib_set_prop_typec_power_role(chg, &pval);

		if (rc < 0) {

			dev_err(chg->dev, "Couldn't enable TYPEC rc=%d\n", rc);

			return rc;

		}

	}





	smblib_apsd_enable(chg, true);

	smblib_apsd_enable(chg, true);

	smblib_hvdcp_detect_enable(chg, false);

	smblib_hvdcp_detect_enable(chg, false);