linux-kernel - [PATCH 3.16 077/136] net: phy: bcm7xxx: define soft

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Date:   Tue, 17 Dec 2019 00:46:51 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Florian Fainelli" <f.fainelli@...il.com>,
        "Doug Berger" <opendmb@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.16 077/136] net: phy: bcm7xxx: define soft_reset for
 40nm EPHY

3.16.80-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Doug Berger <opendmb@...il.com>

commit fe586b823372a9f43f90e2c6aa0573992ce7ccb7 upstream.

The internal 40nm EPHYs use a "Workaround for putting the PHY in
IDDQ mode." These PHYs require a soft reset to restore functionality
after they are powered back up.

This commit defines the soft_reset function to use genphy_soft_reset
during phy_init_hw to accommodate this.

Fixes: 6e2d85ec0559 ("net: phy: Stop with excessive soft reset")
Signed-off-by: Doug Berger <opendmb@...il.com>
Acked-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
[bwh: Backported to 3.16:
 - Delete trailing backslash; there is a single entry for 40 nm PHYs
   and not a macro definition
 - Adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/phy/bcm7xxx.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/phy/bcm7xxx.c
+++ b/drivers/net/phy/bcm7xxx.c
@@ -306,6 +306,7 @@ static struct phy_driver bcm7xxx_driver[
 	.features	= PHY_GBIT_FEATURES |
 			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
 	.flags		= PHY_IS_INTERNAL,
+	.soft_reset	= genphy_soft_reset,
 	.config_init	= bcm7xxx_config_init,
 	.config_aneg	= genphy_config_aneg,
 	.read_status	= genphy_read_status,