Thread (106 messages) 106 messages, 18 authors, 2012-04-11

[PATCH 2/2] clk: Move init fields from clk to clk_hw

From: Saravana Kannan <hidden>
Date: 2012-03-20 20:14:53
Also in: linux-arm-msm, lkml

On 03/20/2012 11:14 AM, Sascha Hauer wrote:
On Tue, Mar 20, 2012 at 03:17:10AM -0700, Saravana Kannan wrote:
quoted
On Tue, March 20, 2012 2:40 am, Sascha Hauer wrote:
quoted
On Tue, Mar 20, 2012 at 12:54:55AM -0700, Saravana Kannan wrote:
quoted
I am using these functions and don't need a static array, I just call
the functions with the desired parameters.
Sure, then let's leave it in. Curious, where do you get the desired
parameters from? Is it static date in code or is it from DT? You somehow
probe it?
It's not from DT. See this thread:

http://www.spinics.net/lists/arm-kernel/msg165839.html
Ah, I see. That's a lot of functions calls. I think it would be much 
more efficient if you just have an array and loop over it. With my 
patch, you can just call a single register function for all these clocks.
quoted
quoted
Overall the clock framework was written in a way that we have to expose
as little information about the internally used structs as necessary. It
seems your patches are pulling in the opposite direction now.
I'm not exposing anything that you don't already pass from the platform
driver. Also, you realize that this is very similar to what you suggested
with clk_initializer right? If there is a strong push, we can make a copy
of these inside the struct clk, but for these few init fields I don't see
a point (see earlier email).
The difference is that a struct clk_initializer is only used to
initialize a clock and not actively used by the clock framework. But as
you already mentioned using a copy inside the clock framework has the
same effect.
My opinion on this is to follow a wait and watch approach on the "flags" 
field. I really can't think of a safe way anyone can misuse it. If 
people start doing that, we can just do the copy and let them deal with 
their broken code. Until that happens, I don't want to waste time/space 
by copying it. The rest of the fields aren't actively used by the common 
clock code after init.

Thanks,
Saravana

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