diff mbox

[4.2.y-ckt,70/70] net: phy: at803x: Request 'reset' GPIO only for AT8030 PHY

Message ID 1460494375-30070-71-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa April 12, 2016, 8:52 p.m. UTC 
4.2.8-ckt8 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Sebastian Frias <sf84@laposte.net>

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@laposte.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/net/phy/at803x.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox

Patch

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;