[PATCH 1/4] Add low level PLL config register interface module

Kumar Gala galak at kernel.crashing.org
Mon Aug 25 21:40:00 EST 2008

On Aug 25, 2008, at 5:41 AM, Kevin Diggs wrote:

> This adds a small module to handle the low level details of dealing  
> with the
> PLL config register (HID1) found in the IBM 750GX. It provides 2  
> possible
> interfaces, both selectable via kernel config options. One is a  
> sysfs attribute
> and the other is a normal function API. It is called pll_if.
> The determination of the bus frequency is what worked on a PowerMac  
> 8600. Any
> suggestions on a more general solution are welcome.
> WARNING - I used some #ifdefs - Let the fur fly!
> My name is Kevin Diggs and I approve this patch.

This really should be split into two patches.  One for the perl script  
and one for the actual kernel code.

Scanning the actual kernel code you have a lot of #ifdef's that should  
be cleaned up:

Can't #ifdef CONFIG_PPC_750GX_DUAL_PLL_IF_SYSFS just be #ifdef  

#ifdef CONFIG_PPC_OF seems unnecessary as all PPC always has this set.

What's up with #define MULFIRST and the #if 0?

- k

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