Common clock: function clock and bus clock

[Russell King - ARM Linux]

On Thu, Mar 20, 2014 at 10:45:27AM +0100, Ben Dooks wrote:
> On 11/03/14 03:06, Chao Xie wrote:
>> hi
>>
>> I can not find any examples for handling function clock and bus clock
>> in drivers/clk/.
>
> The convention is that clk_get(dev, NULL) will get the bus clock
> for the device and that any other clocks are appropriately named.

There is no such convention.  clk_get(dev, NULL) with clkdev (the
reference) will find a clock in the table for the device also with
a NULL connection ID.  That's the only "limitation".

There's no implication that NULL is some kind of bus clock.

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