Patch "extcon: axp288: Use vbus-valid instead of -present to determine cable presence" has been added to the 4.9-stable tree

Patch "extcon: axp288: Use vbus-valid instead of -present to determine cable presence" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    extcon: axp288: Use vbus-valid instead of -present to determine cable presence

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     extcon-axp288-use-vbus-valid-instead-of-present-to-determine-cable-presence.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Oct  5 10:28:31 CEST 2017
From: Hans de Goede <hdegoede@redhat.com>
Date: Mon, 19 Dec 2016 01:13:11 +0100
Subject: extcon: axp288: Use vbus-valid instead of -present to determine cable presence

From: Hans de Goede <hdegoede@redhat.com>


[ Upstream commit 5757aca10146061befd168dab37fb0db1ccd8f73 ]

The vbus-present bit in the power status register also gets set to 1
when a usb-host cable (id-pin shorted to ground) is plugged in and a 5v
boost converter is supplying 5v to the otg usb bus.

This causes a "disconnect or unknown or ID event" warning in dmesg as
well as the extcon device to report the last detected charger cable
type as being connected even though none is connected.

This commit switches to checking the vbus-valid bit instead, which is
only 1 when both vbus is present and the vbus-path is enabled in the
vbus-path control register (the vbus-path gets disabled when a usb-host
cable is detected, to avoid the pmic drawing power from the 5v boost
converter).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/extcon/extcon-axp288.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/extcon/extcon-axp288.c
+++ b/drivers/extcon/extcon-axp288.c
@@ -168,7 +168,7 @@ static int axp288_handle_chrg_det_event(
 		return ret;
 	}
 
-	vbus_attach = (pwr_stat & PS_STAT_VBUS_PRESENT);
+	vbus_attach = (pwr_stat & PS_STAT_VBUS_VALID);
 	if (!vbus_attach)
 		goto notify_otg;
 


Patches currently in stable-queue which might be from hdegoede@redhat.com are

queue-4.9/iio-adc-axp288-drop-bogus-axp288_adc_ts_pin_ctrl-register-modifications.patch
queue-4.9/power-supply-axp288_fuel_gauge-fix-fuel_gauge_reg_readb-return-on-error.patch
queue-4.9/extcon-axp288-use-vbus-valid-instead-of-present-to-determine-cable-presence.patch