[alsa-devel] [PATCH 3/3] ASoC: rt5645: add device tree support

[Rafael J. Wysocki]

On 5/7/2015 1:26 PM, Liam Girdwood wrote:
> On Thu, 2015-05-07 at 05:34 +0000, Bard Liao wrote:
>>>>> +static int rt5645_parse_dt(struct rt5645_priv *rt5645, struct
>>>>> +device_node *np) {
>>>>> + rt5645->pdata.in2_diff = of_property_read_bool(np,
>>>>> +         "realtek,in2-differential");
>>>>> + of_property_read_u32(np,
>>>>> +         "realtek,dmic1-data-pin",
>>> &rt5645->pdata.dmic1_data_pin);
>>>> We should really be using device_property_() instead of
>> of_property_()
>>>> APIs since we will have to support both DT and ACPI properties.
>> Unfortunately, I can't find a way to test it.
> device_property() API calls abstract the device tree calls and ACPI
> calls. So testing with your DT based HW will work.
>
>> Is that ok we just replace all of_property_ with device_property_?
> Yes, that's the intention.
>
>> Also, is there any corresponding API for of_get_named_gpio?
>> Or we can replace it with device_property_read_u32?
>> I tried the change above, and it can build. However I don't know
>> if it can work.
> Oh, I think that's a question for Rafael. I think the intention is to
> have a 1:1 mapping between the APIs so that there are no gaps ?

Yes, that's the idea, but then the GPIO maintainers would like to clean 
up the API too.

Mika is more familiar with the GPIO area than I am.

Mika, can you please help us here?

Rafael