From: Uwe Kleine-König Date: Thu, 12 May 2016 10:00:33 +0000 (+0200) Subject: phy: add support for a reset-gpio specification X-Git-Tag: v4.9.8~2112^2~49 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=da47b4572056487fd7941c26f73b3e8815ff712a;p=platform%2Fkernel%2Flinux-rpi3.git phy: add support for a reset-gpio specification The framework only asserts (for now) that the reset gpio is not active. Signed-off-by: Uwe Kleine-König Reviewed-by: Roger Quadros Signed-off-by: David S. Miller --- diff --git a/Documentation/devicetree/bindings/net/phy.txt b/Documentation/devicetree/bindings/net/phy.txt index bc1c3c8..c00a9a8 100644 --- a/Documentation/devicetree/bindings/net/phy.txt +++ b/Documentation/devicetree/bindings/net/phy.txt @@ -35,6 +35,8 @@ Optional Properties: - broken-turn-around: If set, indicates the PHY device does not correctly release the turn around line low at the end of a MDIO transaction. +- reset-gpios: Reference to a GPIO used to reset the phy. + Example: ethernet-phy@0 { @@ -42,4 +44,5 @@ ethernet-phy@0 { interrupt-parent = <40000>; interrupts = <35 1>; reg = <0>; + reset-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>; }; diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index e977ba9..307f72a 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -34,6 +34,7 @@ #include #include #include +#include #include @@ -1570,9 +1571,16 @@ static int phy_probe(struct device *dev) struct device_driver *drv = phydev->mdio.dev.driver; struct phy_driver *phydrv = to_phy_driver(drv); int err = 0; + struct gpio_descs *reset_gpios; phydev->drv = phydrv; + /* take phy out of reset */ + reset_gpios = devm_gpiod_get_array_optional(dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(reset_gpios)) + return PTR_ERR(reset_gpios); + /* Disable the interrupt if the PHY doesn't support it * but the interrupt is still a valid one */