Hello Marc, Heiko!
I'm sorry for the delay!
On 19.10.2015 10:31, Marc Kleine-Budde wrote:
> On 10/19/2015 09:27 AM, Heiko Schocher wrote:
>>>> .../devicetree/bindings/net/can/ti_hecc-can.txt | 20 ++++++++++
>>>> arch/arm/boot/dts/am3517.dtsi | 13 +++++++
>>>> drivers/net/can/ti_hecc.c | 45
>>>> +++++++++++++++++++++-
>>>> 3 files changed, 76 insertions(+), 2 deletions(-)
>>>> create mode 100644
>>>> Documentation/devicetree/bindings/net/can/ti_hecc-can.txt
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/net/can/ti_hecc-can.txt
>>>> b/Documentation/devicetree/bindings/net/can/ti_hecc-can.txt
>>>> new file mode 100644
>>>> index 0000000..09fab59
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/net/can/ti_hecc-can.txt
>>>> @@ -0,0 +1,20 @@
>>>> +* TI HECC CAN *
>>>> +
>>>> +Required properties:
>>>> + - compatible: Should be "ti,hecc"
>>>
>>> We usually put the name of the first SoC this IP core appears in to the
>>> compatible.
>>
>> Ok, so "ti,am335xx-hecc" would be OK?
>> @Anton: you used "am35x" ... it should be "am35xx"
>
> The "xx" is not okay. Give precisely the first SoC Version this IP core
> was implemented in.
>
It's OMAP3 based arch, but HECC is implemented only in AM3505 and AM3517 SoCs.
So, I'm confused about what's "name" should I use.
>>
>>>> + - reg: Should contain CAN controller registers location and length
>>>> + - interrupts: Should contain IRQ line for the CAN controller
>>>
>>> I'm missing the description of the ti,* properties. I think they are
>>> required, too. Although the code doesn't enforce it.
>>
>> Ok.
>>
>>>> +
>>>> +Example:
>>>> +
>>>> + can0: hecc@5c050000 {
>>>> + compatible = "ti,hecc";
>>>> + reg = <0x5c050000 0x4000>;
>>>> + interrupts = <24>;
>>>> + ti,hecc_scc_offset = <0>;
>>>> + ti,hecc_scc_ram_offset = <0x3000>;
>>>> + ti,hecc_ram_offset = <0x3000>;
>>>> + ti,hecc_mbx_offset = <0x2000>;
>>>> + ti,hecc_int_line = <0>;
>>>> + ti,hecc_version = <1>;
>>>
>>> Versioning in the OF world is done via the compatible. Are the offsets a
>>> per SoC parameter? I'm not sure if it's better to put
>>> the offsets into the driver.
>>
>> I am unsure here too..
>
> The devicetree people will hopefully help here.
>
I added offsets here just make it consistent with platform data in machine file.
Actually it seems that it's not necessary to put offsets in DT file and I can
move it to driver.
But again, it was added to keep consistency.
> regards,
> Marc
>
regards,
Anton
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