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Commit caa465c2 authored by Ajay Agarwal's avatar Ajay Agarwal
Browse files

phy: msm: ssusb: Add support for cable_connected flag 



Currently the phy-msm-ssusb driver sets the POWERDOWN bit and
turns off the clocks and regulators as a part of suspend
irrespective of whether cable is connected or not.
Add a new flag cable_connected and set the POWERDOWN flag and
turn off the regulators only if cable is disconnected.

Change-Id: I179db4116d2b5b271916ea4e97534a5cd36fb0a1
Signed-off-by: default avatarAjay Agarwal <ajaya@codeaurora.org>
parent e7ffd910

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

+23 −10
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2012-2014,2017-2019 The Linux Foundation. All rights reserved.

 * Copyright (c) 2012-2014,2017-2020, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -63,6 +63,7 @@ struct msm_ssphy { 
	struct clk		*cfg_ahb_clk;

	struct clk		*pipe_clk;

	bool			clocks_enabled;

	bool			cable_connected;



	struct reset_control	*phy_com_reset;

	struct reset_control	*phy_reset;
@@ -353,23 +354,33 @@ static int msm_ssphy_set_suspend(struct usb_phy *uphy, int suspend) 


		msm_usb_write_readback(phy->base, SS_PHY_CTRL2,

					REF_SS_PHY_EN, 0);

		msm_usb_write_readback(phy->base, SS_PHY_CTRL4,

					REF_USE_PAD, 0);

		if (!phy->cable_connected)

			msm_usb_write_readback(phy->base, SS_PHY_CTRL4,

						TEST_POWERDOWN, TEST_POWERDOWN);



		msm_ssusb_disable_clocks(phy);

		if (!phy->cable_connected) {

			msm_ssusb_ldo_enable(phy, 0);

			msm_ssusb_config_vdd(phy, 0);

		}

		phy->suspended = true;

	} else {



		if (!phy->cable_connected) {

			rc = msm_ssusb_config_vdd(phy, 1);

			if (rc)

				return rc;

			msm_ssusb_ldo_enable(phy, 1);

		}

		msm_ssusb_enable_clocks(phy);



		msm_usb_write_readback(phy->base, SS_PHY_CTRL4,

					REF_USE_PAD, REF_USE_PAD);

		msm_usb_write_readback(phy->base, SS_PHY_CTRL2,

					REF_SS_PHY_EN, REF_SS_PHY_EN);

		if (!phy->cable_connected)

			msm_usb_write_readback(phy->base, SS_PHY_CTRL4,

						TEST_POWERDOWN, 0);
@@ -384,6 +395,7 @@ static int msm_ssphy_notify_connect(struct usb_phy *uphy, 
{

	struct msm_ssphy *phy = container_of(uphy, struct msm_ssphy, phy);



	phy->cable_connected = true;

	if (uphy->flags & PHY_HOST_MODE)

		return 0;
@@ -400,6 +412,7 @@ static int msm_ssphy_notify_disconnect(struct usb_phy *uphy, 
{

	struct msm_ssphy *phy = container_of(uphy, struct msm_ssphy, phy);



	phy->cable_connected = false;

	if (uphy->flags & PHY_HOST_MODE)

		return 0;