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Commit b82cc3a4 authored by Sriharsha Allenki's avatar Sriharsha Allenki
Browse files

usb: phy: qusb: Do not power down PHY if EUD is enabled 



If HS PHY is powered down as part of spoof disconnect,
it will leads to enumeration failure of EUD on host PC.
Hence do not power down the PHY as part of suspend
when EUD is enabled.

Change-Id: Iec76b9081f59cb18cd876f59e94081297fce5d2b
Signed-off-by: default avatarSriharsha Allenki <sallenki@codeaurora.org>
parent 2a98f234

drivers/usb/phy/phy-msm-qusb.c

+17 −7
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2014-2019, The Linux Foundation. All rights reserved.

 * Copyright (c) 2014-2020, The Linux Foundation. All rights reserved.

 */



#include <linux/module.h>
@@ -561,6 +561,11 @@ static void qusb_phy_shutdown(struct usb_phy *phy) 


	dev_dbg(phy->dev, "%s\n", __func__);



	if (qphy->eud_enable_reg && readl_relaxed(qphy->eud_enable_reg)) {

		dev_err(qphy->phy.dev, "eud is enabled\n");

		return;

	}



	qusb_phy_enable_clocks(qphy, true);



	/* Disable the PHY */
@@ -647,15 +652,20 @@ static int qusb_phy_set_suspend(struct usb_phy *phy, int suspend) 
			writel_relaxed(0x00,

				qphy->base + QUSB2PHY_PORT_INTR_CTRL);



			if (!qphy->eud_enable_reg ||

					!readl_relaxed(qphy->eud_enable_reg)) {

				/* Disable PHY */

			writel_relaxed(POWER_DOWN | readl_relaxed(qphy->base +

				writel_relaxed(POWER_DOWN |

					readl_relaxed(qphy->base +

					QUSB2PHY_PORT_POWERDOWN),

					qphy->base + QUSB2PHY_PORT_POWERDOWN);

				/* Make sure that above write is completed */

				wmb();



				if (qphy->tcsr_clamp_dig_n)

				writel_relaxed(0x0, qphy->tcsr_clamp_dig_n);

					writel_relaxed(0x0,

						qphy->tcsr_clamp_dig_n);

			}



			qusb_phy_enable_clocks(qphy, false);

			qusb_phy_enable_power(qphy, false);