Re: [PATCH v5 11/44] clk: davinci: Add platform information for TI DA830 PSC

[Sekhar Nori]

On Wednesday 17 January 2018 11:02 PM, David Lechner wrote:
>>>>> +ÂÂÂ clk_register_clkdev(clk_data->clks[3], "gpio", NULL);
>>>>
>>>> This is pretty bad (and no fault of yours) - having a con_id but no
>>>> device name. Can you please make a pre-series which passes NULL con_id
>>>> in gpio-davinci.c?
>>>
>>> I'll give it a try. This is complicated by the fact that the con_id has
>>> made it's way into the device tree bindings. However, I think we can
>>> safely deprecate clock-names = "gpio" in the device tree bindings since
>>> we can make the driver ignore that property to preserve backwards
>>> compatibility.
> 
> Agreed.
> 
>> I don't think this breaks DT-backward compatibility. Passing a NULL
>> con_id in driver should find the clock for that device even if DT entry
>> has clock-names present. As far as I can read clk_find().
>>
>> The less intrusive alternate is to add the GPIO device name in the table
>> here, while keeping the con_id and keeping the driver untouched. The
>> advantage of that is lesser number of dependent patches for this series
>> to go in.
>>
>> Later once CCF conversion has been there in the kernel for one full
>> release and no regressions, these other clean-ups can be done.
> 
> I like this approach.

One downside is that we will have to have clock-names = "gpio" in da850
device-tree too. Since its already present in keystone already, I don't
think adding one more is such a big issue.

Thanks,
Sekhar