Re: [patch 06/10] 40x decrementer fixes
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From: Sergei Shtylyov <hidden>
Date: 2007-08-03 17:08:21
I wrote:
quoted
Allow generic_calibrate_decr to work for 40x platforms. Given that the hardware behavior is identical, this also changes the set_dec function to reload the PIT
It's not actually identical. When you're writing to the PIT reg on 40x, you're alos writing to the hidden PIT auto-reload reg. which is not the case for 440 that is true Book E.
quoted
on 40x to match the behavior 44x currently has.
Why bother doing this?! This will only warrant you imprecise decrementer interrupts while it should be interrupting at the precise period currently (if you load PIT once)...
I.e. the error will only accumulate. NAK. WBR, Sergei