linux-kernel - [PATCH] net: phy: broadcom: Wire suspend/resume for BCM54612E

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Message-ID: <20231030225446.17422-1-marcovr@selfnet.de>
Date:   Mon, 30 Oct 2023 23:54:45 +0100
From:   Marco von Rosenberg <marcovr@...fnet.de>
To:     Florian Fainelli <florian.fainelli@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Marco von Rosenberg <marcovr@...fnet.de>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] net: phy: broadcom: Wire suspend/resume for BCM54612E

On some devices, the bootloader suspends the PHY before booting the OS.
Not having a resume callback wired up is a problem in such situations
since it is then never resumed.
This behavior was observed with a Huawei enterprise WLAN access point.

The BCM54612E ethernet PHY supports IDDQ-SR.
Therefore wire-up the suspend and resume callbacks
to point to bcm54xx_suspend() and bcm54xx_resume().

The same wire-up has been done in commit 38b6a9073007 ("net: phy:
broadcom: Wire suspend/resume for BCM50610 and BCM50610M") for two PHYs
also supporting IDDQ-SR.

Signed-off-by: Marco von Rosenberg <marcovr@...fnet.de>
---
 drivers/net/phy/broadcom.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c
index 04b2e6eeb195..ac14f223649b 100644
--- a/drivers/net/phy/broadcom.c
+++ b/drivers/net/phy/broadcom.c
@@ -1060,6 +1060,8 @@ static struct phy_driver broadcom_drivers[] = {
 	.handle_interrupt = bcm_phy_handle_interrupt,
 	.link_change_notify	= bcm54xx_link_change_notify,
 	.led_brightness_set	= bcm_phy_led_brightness_set,
+	.suspend	= bcm54xx_suspend,
+	.resume		= bcm54xx_resume,
 }, {
 	.phy_id		= PHY_ID_BCM54616S,
 	.phy_id_mask	= 0xfffffff0,
-- 
2.42.0