Re: [Question] Can of_find_spi_xx_by_node be moved out of CONFIG_OF_DYNAMIC in SPI driver

[qiaozhou <qiaozhou-XOWFcpiLszpWk0Htik3J/w@public.gmane.org>]

On 2016年07月15日 18:58, Mark Brown wrote:
> On Fri, Jul 15, 2016 at 10:03:26AM +0800, qiaozhou wrote:
>
>> My case is like this: I got a ARM mali-video driver, which may have several
>> ports/endpoints, which needs I2C/SPI interface to do some initiation. In the
>> video driver, it uses device node conf to find matching ports, and calls
> This sounds like a fairly standard setup, most external HDMI encoders
> are I2C and SPI controlled, which already works fine as far as I'm aware.
>
>> functions, such as of_find_video_tx_by_node -> of_find_i2c_device_by_node.
>> Now the hardware changes from i2c to spi, so I wonder whether
>> of_find_spi_device_by_node can be used freely. Otherwise I may need to
>> modify the mali-video driver, and as it's provided to us and may get updated
>> from time to time, my change may be conflicted with future versions.
>> Also I didn't quite understand the way to "use a phandle to connect the two
>> devices", is there any code/driver which I can take as a reference? I'll
>> study it.
> Off the top of my head something like the TDA998x or ADV7511 should be
> worth looking at here - it just sounds like the the Mali driver may just
> not be using the frameworks well, you should probably encourage people
> to get it upstreamed.
Got it. I'll check it. Thanks a lot for the suggestions.

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