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[PATCH] powerpc: Add support for Book-E timer config to generic_calibrate_decr 

We need to initialize some control SPRS for timers on Book-E before
we start taking decrementer interrupts.

Signed-off-by: Kumar K. Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Kumar Gala 2005-10-25 23:02:59 -05:00 committed by Paul Mackerras
parent ab590ccb42
commit 0fd6f71794
1 changed files with 11 additions and 0 deletions
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11
arch/powerpc/kernel/time.c
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@ -610,6 +610,17 @@ void __init generic_calibrate_decr(void)
ppc_proc_freq = *fp;
}
}
#ifdef CONFIG_BOOKE
/* Set the time base to zero */
mtspr(SPRN_TBWL, 0);
mtspr(SPRN_TBWU, 0);
/* Clear any pending timer interrupts */
mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
/* Enable decrementer interrupt */
mtspr(SPRN_TCR, TCR_DIE);
#endif
if (!node_found)
printk(KERN_ERR "WARNING: Estimating processor frequency "
"(not found)\n");