From 0fd6f717948083d480f38e97f62cc116faf0e534 Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Tue, 25 Oct 2005 23:02:59 -0500 Subject: [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 Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/time.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/powerpc/kernel/time.c') diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index 82f2cabb4f47..9f264c2f02c3 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -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"); -- cgit v1.2.2