linux-kernel - [PATCH 5/6] phy: usb: Use slow clock for wake enabled suspend

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Message-Id: <1665005418-15807-6-git-send-email-justinpopo6@gmail.com>
Date:   Wed,  5 Oct 2022 14:30:17 -0700
From:   justinpopo6@...il.com
To:     alcooperx@...il.com, kishon@...com, vkoul@...nel.org,
        f.fainelli@...il.com, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org
Cc:     bcm-kernel-feedback-list@...adcom.com,
        Justin Chen <justinpopo6@...il.com>
Subject: [PATCH 5/6] phy: usb: Use slow clock for wake enabled suspend

From: Justin Chen <justinpopo6@...il.com>

The logic was incorrect when switching to slow clock. We want the slow
clock if wake_enabled is set.

Fixes: ae532b2b7aa5 ("usb: Add "wake on" functionality for newer Synopsis XHCI controllers")
Signed-off-by: Justin Chen <justinpopo6@...il.com>
---
 drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c
index 6a4d478..f78cff2 100644
--- a/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c
+++ b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c
@@ -337,13 +337,12 @@ static void usb_uninit_common_7216(struct brcm_usb_init_params *params)
 
 	pr_debug("%s\n", __func__);
 
-	if (!params->wake_enabled) {
-		USB_CTRL_SET(ctrl, USB_PM, USB_PWRDN);
-
+	if (params->wake_enabled) {
 		/* Switch to using slower clock during suspend to save power */
 		USB_CTRL_SET(ctrl, USB_PM, XHC_S2_CLK_SWITCH_EN);
-	} else {
 		usb_wake_enable_7216(params, true);
+	} else {
+		USB_CTRL_SET(ctrl, USB_PM, USB_PWRDN);
 	}
 }
 
-- 
2.7.4