42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
From: Sebastian Frias <sf84@laposte.net>
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Date: Wed, 23 Mar 2016 11:49:09 +0100
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Subject: [PATCH] net: phy: at803x: Request 'reset' GPIO only for AT8030 PHY
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This removes the dependency on GPIOLIB for non faulty PHYs.
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Indeed, without this patch, if GPIOLIB is not selected
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devm_gpiod_get_optional() will return -ENOSYS and the driver probe
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call will fail, regardless of the actual PHY hardware.
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Out of the 3 PHYs supported by this driver (AT8030, AT8031, AT8035),
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only AT8030 presents the issues that commit 13a56b449325 ("net: phy:
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at803x: Add support for hardware reset") attempts to work-around by
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using a 'reset' GPIO line.
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Hence, only AT8030 should depend on GPIOLIB operating properly.
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Fixes: 13a56b449325 ("net: phy: at803x: Add support for hardware reset")
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Signed-off-by: Sebastian Frias <sf84@laposte.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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--- a/drivers/net/phy/at803x.c
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+++ b/drivers/net/phy/at803x.c
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@@ -250,12 +250,16 @@ static int at803x_probe(struct phy_devic
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if (!priv)
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return -ENOMEM;
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+ if (phydev->drv->phy_id != ATH8030_PHY_ID)
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+ goto does_not_require_reset_workaround;
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+
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gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(gpiod_reset))
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return PTR_ERR(gpiod_reset);
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priv->gpiod_reset = gpiod_reset;
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+does_not_require_reset_workaround:
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phydev->priv = priv;
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return 0;
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