diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/net/mdio.txt | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/Documentation/devicetree/bindings/net/mdio.txt b/Documentation/devicetree/bindings/net/mdio.txt index 4ffbbacebda1..96a53f89aa6e 100644 --- a/Documentation/devicetree/bindings/net/mdio.txt +++ b/Documentation/devicetree/bindings/net/mdio.txt @@ -3,13 +3,17 @@ Common MDIO bus properties. These are generic properties that can apply to any MDIO bus. Optional properties: -- reset-gpios: List of one or more GPIOs that control the RESET lines - of the PHYs on that MDIO bus. -- reset-delay-us: RESET pulse width in microseconds as per PHY datasheet. +- reset-gpios: One GPIO that control the RESET lines of all PHYs on that MDIO + bus. +- reset-delay-us: RESET pulse width in microseconds. A list of child nodes, one per device on the bus is expected. These should follow the generic phy.txt, or a device specific binding document. +The 'reset-delay-us' indicates the RESET signal pulse width in microseconds and +applies to all PHY devices. It must therefore be appropriately determined based +on all PHY requirements (maximum value of all per-PHY RESET pulse widths). + Example : This example shows these optional properties, plus other properties required for the TI Davinci MDIO driver. @@ -21,7 +25,7 @@ required for the TI Davinci MDIO driver. #size-cells = <0>; reset-gpios = <&gpio2 5 GPIO_ACTIVE_LOW>; - reset-delay-us = <2>; /* PHY datasheet states 1us min */ + reset-delay-us = <2>; ethphy0: ethernet-phy@1 { reg = <1>; |