diff options
Diffstat (limited to 'target/linux/generic/patches-4.4/736-at803x-fix-reset-handling.patch')
| -rw-r--r-- | target/linux/generic/patches-4.4/736-at803x-fix-reset-handling.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.4/736-at803x-fix-reset-handling.patch b/target/linux/generic/patches-4.4/736-at803x-fix-reset-handling.patch new file mode 100644 index 0000000000..91c2334e55 --- /dev/null +++ b/target/linux/generic/patches-4.4/736-at803x-fix-reset-handling.patch @@ -0,0 +1,43 @@ +From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> +Date: Wed, 23 Mar 2016 00:44:40 +0300 +Subject: [PATCH] at803x: fix reset handling +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +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> +--- + +--- a/drivers/net/phy/at803x.c ++++ b/drivers/net/phy/at803x.c +@@ -250,7 +250,7 @@ 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); + +@@ -377,10 +377,10 @@ 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); + |