Subject: how to specify an OMAP clock in device tree?

From: [email-masked] (Rajendra Nayak)
Date: Tue, 5 Feb 2013 20:06:46 +0530

On Tuesday 05 February 2013 07:59 PM, Roger Quadros wrote:
> On 02/05/2013 04:21 PM, Rajendra Nayak wrote:
>> On Tuesday 05 February 2013 07:48 PM, Roger Quadros wrote:
>>> On 02/05/2013 04:13 PM, Rajendra Nayak wrote:
>>>> On Tuesday 05 February 2013 07:16 PM, Roger Quadros wrote:
>>>>> Fixing the device name doesn't really solve the problem.
>>>>> Not all OMAP boards will use the same clock for the external device.
>>>>
>>>> Are you saying different OMAP boards will use different Internal clocks?
>>>> Or different OMAP boards will use a single Internal clock or an
>>>> external one.
>>>>
>>> All I was saying is that one board can use for example auxclk1 whereas another
>>> one can use auxclk3, both generated by OMAP for the same PHY configuration.
>>
>> Ok, so lets keep DT aside for a while. How would something like this
>> work in a non-DT world? Would the driver then be able to do a
>> clk_get(dev, "main_clk"); and get say auxclk1 on one board and
>> auxclk3 on another?
>>
>
> Yes, all you need to do is specify an alias to the clock in the board file.

Can we then create a special board specific node for panda and do
similar things from DT?
See a similar discussion below on how to handle the gpio_request()
we had as part of board files
http://www.spinics.net/lists/linux-omap/msg85248.html

>
> e.g. in board 1 file
> 	clk_add_alias("main_clk", "phy.1", "auxclk1_ck", NULL);
>
> in board 2 file
> 	clk_add_alias("main_clk", "phy.1", "auxclk3_ck", NULL);
>
> cheers,
> -roger
>