linux-kernel - [RFC][PATCH 2/3] usb: phy: msm: notify charger when power supply is unplugged

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Message-Id: <20170414184330.22296-3-damien.riegel@savoirfairelinux.com>
Date:   Fri, 14 Apr 2017 14:43:29 -0400
From:   Damien Riegel <damien.riegel@...oirfairelinux.com>
To:     linux-usb@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        kernel@...oirfairelinux.com,
        Damien Riegel <damien.riegel@...oirfairelinux.com>
Subject: [RFC][PATCH 2/3] usb: phy: msm: notify charger when power supply is unplugged

With the current code, msm_otg_notify_charger doesn't get called when a
power supply identified as a DCP is unplugged. To work around that,
update charger info and call the notify function when switching from
idle to host.

Signed-off-by: Damien Riegel <damien.riegel@...oirfairelinux.com>
---
 drivers/usb/phy/phy-msm-usb.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index c1460182bc56..f89a2a540f71 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -1349,6 +1349,9 @@ static void msm_otg_sm_work(struct work_struct *w)
 			writel(readl(USB_OTGSC) & ~OTGSC_BSVIE, USB_OTGSC);
 			msm_otg_start_host(otg->usb_phy, 1);
 			otg->state = OTG_STATE_A_HOST;
+			motg->chg_state = USB_CHG_STATE_UNDEFINED;
+			motg->chg_type = USB_INVALID_CHARGER;
+			msm_otg_notify_charger(motg, 0);
 		} else if (test_bit(B_SESS_VLD, &motg->inputs)) {
 			switch (motg->chg_state) {
 			case USB_CHG_STATE_UNDEFINED:
-- 
2.12.2