Re: [PATCH v3 09/10] ARM: dts: introduce MPS2 AN385/AN386

Vladimir Murzin
2016-02-17T16:48:44Z

On 16/02/16 16:10, Vladimir Murzin wrote:
> On 16/02/16 11:01, Arnd Bergmann wrote:
>> On Tuesday 16 February 2016 10:08:14 Vladimir Murzin wrote:
>>> +
>>> + ethernet@40200000 {
>>> + compatible = "smsc,lan9220", "smsc,lan9115";
>>> + reg = <0x40200000 0x10000>;
>>> + interrupts = <13>;
>>> + interrupt-parent = <&nvic>;
>>> + smsc,irq-active-high;
>>> + };
>>> +};
>>> +
>>>
>>
>> This node seems slightly misplaced. Is there some external bus interface
>> that this is connected to? The address suggests that it should be somewhere
>> below the /soc node, and you probably want to list the external bus
>> interface with a "ranges" property that identifies the addresses visibile
>> there, and put the external chip under there.
>>
>
> I might messed it up since the MAC/PHY connects to the same 16-bit
> interface as the 16MB PSRAM external memory and both connected via AHB.
>
> Not sure how it should be expressed, so some help form DT camp would be
> appreciated.

Arnd,

Does following fixup address your point on where/how ethernet node
should be placed?

diff --git a/arch/arm/boot/dts/mps2-an385.dts b/arch/arm/boot/dts/an385.dts
index 976f86d..50c8d24 100644
--- a/arch/arm/boot/dts/mps2-an385.dts
+++ b/arch/arm/boot/dts/mps2-an385.dts
@@ -63,14 +63,10 @@
device_type = "memory";
reg = <0x21000000 0x1000000>;
};
+};

- ethernet@40200000 {
- compatible = "smsc,lan9220", "smsc,lan9115";
- reg = <0x40200000 0x10000>;
- interrupts = <13>;
- interrupt-parent = <&nvic>;
- smsc,irq-active-high;
- };
+&mb {
+ ranges = <0 0x40200000 0x10000>;
};

&uart0 {
diff --git a/arch/arm/boot/dts/mps2.dtsi b/arch/arm/boot/dts/mps2.dtsi
index 5d2c539..1673472 100644
--- a/arch/arm/boot/dts/mps2.dtsi
+++ b/arch/arm/boot/dts/mps2.dtsi
@@ -223,5 +223,21 @@
default-state = "off";
};
};
+
+ };
+
+ mb: smb {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ ethernet@0 {
+ compatible = "smsc,lan9220", "smsc,lan9115";
+ reg = <0x0 0x10000>;
+ interrupts = <13>;
+ interrupt-parent = <&nvic>;
+ smsc,irq-active-high;
+ };
};
};

Cheers
Vladimir

>
> Cheers
> Vladimir
>
>> Arnd
>>
>>
>>
>
>
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