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From: Sebastian Frias <sf84@laposte.net>
Date: Wed, 23 Mar 2016 11:49:09 +0100
Subject: [PATCH] net: phy: at803x: Request 'reset' GPIO only for AT8030 PHY
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@laposte.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -250,12 +250,16 @@ static int at803x_probe(struct phy_devic
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;
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