netdev - [PATCH net-next 9/9] phy: fixed_phy: Set phy capabilities even when link is down

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Message-Id: <1440323220-20438-10-git-send-email-andrew@lunn.ch>
Date:	Sun, 23 Aug 2015 11:47:00 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	David Miller <davem@...emloft.net>
Cc:	Florian Fainelli <f.fainelli@...il.com>,
	netdev <netdev@...r.kernel.org>, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next 9/9] phy: fixed_phy: Set phy capabilities even when link is down

What features a phy supports is masked in genphy_config_init() by
looking at the PHYs BMSR register.

If the link is down, fixed_phy_update_regs() will only set the auto-
negotiation capable bit in BMSR. Thus genphy_config_init() comes to
the conclusion the PHY can only perform 10/Half, and masks out the
higher speed features. If however the link it up, BMSR is set to
indicate the speed the PHY is capable of auto-negotiating, and
genphy_config_init() does not mask out the high speed features.

To fix this, when the link is down, have fixed_phy_update_regs() leave
the link status and auto-negotiation complete bit unset, but set all
the other bits depending on the fixed phy speed.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/phy/fixed_phy.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index 14ab80899e77..ff4869222c27 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -57,9 +57,8 @@ static int fixed_phy_update_regs(struct fixed_phy *fp)
 	if (gpio_is_valid(fp->link_gpio))
 		fp->status.link = !!gpio_get_value_cansleep(fp->link_gpio);

-	if (!fp->status.link)
-		goto done;
-	bmsr |= BMSR_LSTATUS | BMSR_ANEGCOMPLETE;
+	if (fp->status.link)
+		bmsr |= BMSR_LSTATUS | BMSR_ANEGCOMPLETE;

 	if (fp->status.duplex) {
 		bmcr |= BMCR_FULLDPLX;
@@ -111,7 +110,6 @@ static int fixed_phy_update_regs(struct fixed_phy *fp)
 	if (fp->status.asym_pause)
 		lpa |= LPA_PAUSE_ASYM;

-done:
 	fp->regs[MII_PHYSID1] = 0;
 	fp->regs[MII_PHYSID2] = 0;

-- 
2.5.0

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