[4.2.y-ckt stable] Patch "net: phy: at803x: Request 'reset' GPIO only for AT8030 PHY" has been added to the 4.2.y-ckt tree
Kamal Mostafa
kamal at canonical.com
Tue Apr 12 20:50:31 UTC 2016
This is a note to let you know that I have just added a patch titled
net: phy: at803x: Request 'reset' GPIO only for AT8030 PHY
to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue
This patch is scheduled to be released in version 4.2.8-ckt8.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
---8<------------------------------------------------------------
>From c9b1b313fc49f20f253dfe796a2cbc77223d0d7c Mon Sep 17 00:00:00 2001
From: Sebastian Frias <sf84 at laposte.net>
Date: Wed, 23 Mar 2016 11:49:09 +0100
Subject: net: phy: at803x: Request 'reset' GPIO only for AT8030 PHY
commit 9eb13f65c305ec6687d7666abce14e6c047fa872 upstream.
This removes the dependency on GPIOLIB for non faulty PHYs.
Indeed, without this patch, if GPIOLIB is not selected
devm_gpiod_get_optional() will return -ENOSYS and the driver probe
call will fail, regardless of the actual PHY hardware.
Out of the 3 PHYs supported by this driver (AT8030, AT8031, AT8035),
only AT8030 presents the issues that commit 13a56b449325 ("net: phy:
at803x: Add support for hardware reset") attempts to work-around by
using a 'reset' GPIO line.
Hence, only AT8030 should depend on GPIOLIB operating properly.
Fixes: 13a56b449325 ("net: phy: at803x: Add support for hardware reset")
Signed-off-by: Sebastian Frias <sf84 at laposte.net>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
drivers/net/phy/at803x.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index 5fbca04..d7e39f6 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -198,12 +198,16 @@ static int at803x_probe(struct phy_device *phydev)
if (!priv)
return -ENOMEM;
+ if (phydev->drv->phy_id != ATH8030_PHY_ID)
+ goto does_not_require_reset_workaround;
+
gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(gpiod_reset))
return PTR_ERR(gpiod_reset);
priv->gpiod_reset = gpiod_reset;
+does_not_require_reset_workaround:
phydev->priv = priv;
return 0;
--
2.7.4
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