[PATCH 1/2] ARM: at91/dt: describe rgmii ethernet phy connected to sama5d3xek boards
Boris BREZILLON
boris.brezillon at free-electrons.com
Wed Jun 25 00:30:20 PDT 2014
Hello Bo,
On 25/06/2014 08:59, Bo Shen wrote:
> Hi Boris,
>
> On 06/25/2014 06:44 AM, Boris BREZILLON wrote:
>> Add ethernet-phy node to specify phy address (on the MDIO bus) and phy
>> interrupt (connected to pin PB25).
>>
>> Define board specific delays to apply to RGMII signals.
>>
>> Signed-off-by: Boris BREZILLON <boris.brezillon at free-electrons.com>
>> ---
>> arch/arm/boot/dts/sama5d3xcm.dtsi | 16 ++++++++++++++++
>> 1 file changed, 16 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/sama5d3xcm.dtsi
>> b/arch/arm/boot/dts/sama5d3xcm.dtsi
>> index b0b1331..2185ad8 100644
>> --- a/arch/arm/boot/dts/sama5d3xcm.dtsi
>> +++ b/arch/arm/boot/dts/sama5d3xcm.dtsi
>> @@ -34,6 +34,22 @@
>>
>> macb0: ethernet at f0028000 {
>> phy-mode = "rgmii";
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + ethernet-phy at 1 {
>
> The GMAC PHY address is 0x7 while not 0x1.
Are you sure of that ? I checked sama5d3x-ek schematics.
On these schematics PHYAD0 is connected to a pull up resistor and
PHYAD1/2 are connected to a pull down one.
This gives PHYAD[4:0] = 0b00001 = 0x1.
Is there some bootloader mechanisms that changes PHYAD[0-2] pin status
and reset the PHY ?
>
>> + interrupt-parent = <&pioB>;
>> + interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
>> + reg = <1>;
>
> Nitpick: as usual, we will add "0x" prefix in reg property.
Sure, I'll fix that.
>
>> + txen-skew-ps = <800>;
>> + txc-skew-ps = <12000>;
Should be 3000 (0xf * 200 ps) not 12000.
>> + rxdv-skew-ps = <400>;
>> + rxc-skew-ps = <12000>;
Ditto.
Best Regards,
Boris
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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