Re: [PATCH 3/4] dt-bindings: net: phy: mscc: vsc8531: fix missing "/bits/ 8" in example

From: Andrew Lunn
Date: Mon Jul 30 2018 - 09:58:21 EST


On Mon, Jul 30, 2018 at 03:02:35PM +0200, Quentin Schulz wrote:
> The "vsc8531,led-N-mode" property is read as a u8 in the driver and
> there aren't a lot of modes anyway.
>
> Without the "/bits/ 8" in front of the value of the property, the
> value is stored as an u32 resulting in of_read_property_u8 to always
> return 0.

Hi Quentin

on big endian systems. I'm expect this worked on little endian ARM. I
think the development work was done on a hacked RPi, if i remember
correctly.

>
> Fix the example so that people using the property can actually use it.
>
> Signed-off-by: Quentin Schulz <quentin.schulz@xxxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> index 664d9d0543fc..4c7d1d384df0 100644
> --- a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> +++ b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> @@ -63,6 +63,6 @@ Example:
> compatible = "ethernet-phy-id0007.0570";
> vsc8531,vddmac = <3300>;
> vsc8531,edge-slowdown = <7>;
> - vsc8531,led-0-mode = <LINK_1000_ACTIVITY>;
> - vsc8531,led-1-mode = <LINK_100_ACTIVITY>;
> + vsc8531,led-0-mode = /bits/ 8 <LINK_1000_ACTIVITY>;
> + vsc8531,led-1-mode = /bits/ 8 <LINK_100_ACTIVITY>;

I don't know the device tree language well enough...

Would this work?

vsc8531,led-1-mode = < /bits/ 8 LINK_100_ACTIVITY>;

If so, you can make it part of the #define.

Andrew