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Commit d58fae47 authored by Fenglin Wu's avatar Fenglin Wu
Browse files

power: supply: qcom: Add 40ms delay before updating 5V VBUS allowance 



When charging with some fixed voltage USBPD adapters and when VBUS voltage
is moving from 9V to 5V, usbin-ov interrupt is triggered because of the
VBUS voltage is not settled before updating 5V VBUS allowance. To avoid
this, adding 40ms delay before updating 5V VBUS allowance.

Change-Id: I1a439210e7ceb46bf59f900f3c72e71715c590d3
Signed-off-by: default avatarFenglin Wu <fenglinw@codeaurora.org>
parent 3b06ec12

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

+9 −0
Original line number Diff line number Diff line
@@ -789,6 +789,7 @@ static int smblib_set_usb_pd_fsw(struct smb_charger *chg, int voltage) 


#define CONT_AICL_HEADROOM_MV		1000

#define AICL_THRESHOLD_MV_IN_CC		5000

#define VSAFE5V_SETTLE_US		40000

static int smblib_set_usb_pd_allowed_voltage(struct smb_charger *chg,

					int min_allowed_uv, int max_allowed_uv)

{
@@ -814,6 +815,14 @@ static int smblib_set_usb_pd_allowed_voltage(struct smb_charger *chg, 
		return -EINVAL;

	}



	/*

	 * usbin-ov interrupt is seen with some USBPD adapters when moving

	 * from 9V to 5V. To avoid this, add delay here to wait VBUS voltage

	 * settled before updating VBUS allowance to 5V.

	 */

	if (vbus_allowance == FORCE_5V)

		usleep_range(VSAFE5V_SETTLE_US, VSAFE5V_SETTLE_US + 1);



	rc = smblib_usb_pd_adapter_allowance_override(chg, vbus_allowance);

	if (rc < 0) {

		smblib_err(chg, "set CONTINUOUS allowance failed, rc=%d\n",