Commit 0fd6f717 authored by Kumar Gala's avatar Kumar Gala Committed by Paul Mackerras
Browse files

[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: default avatarKumar K. Gala <kumar.gala@freescale.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent ab590ccb

arch/powerpc/kernel/time.c

+11 −0
Original line number Diff line number Diff line
@@ -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");