diff mbox series

[4.4,297/312] at803x: fix reset handling

Message ID 20200508123145.266175751@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH May 8, 2020, 12:34 p.m. UTC 
From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>

commit d57019d1858a6f9b3ca05d76d793466ae428cfa3 upstream.

The driver of course "knows" that the chip's reset signal is active low,
so  it drives the GPIO to 0  to reset the PHY and to 1 otherwise; however
all this will only work iff the GPIO  is  specified as active-high in the
device tree!  I think both the driver and the device trees (if there are
any -- I was unable to find them) need to be fixed in this case...

Fixes: 13a56b449325 ("net: phy: at803x: Add support for hardware reset")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/phy/at803x.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -198,7 +198,7 @@  static int at803x_probe(struct phy_devic
 	if (!priv)
 		return -ENOMEM;
 
-	gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+	gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(gpiod_reset))
 		return PTR_ERR(gpiod_reset);
 
@@ -274,10 +274,10 @@  static void at803x_link_change_notify(st
 
 				at803x_context_save(phydev, &context);
 
-				gpiod_set_value(priv->gpiod_reset, 0);
-				msleep(1);
 				gpiod_set_value(priv->gpiod_reset, 1);
 				msleep(1);
+				gpiod_set_value(priv->gpiod_reset, 0);
+				msleep(1);
 
 				at803x_context_restore(phydev, &context);