Blackfin: SMP: implement cpu_freq support
Re-use some of the existing cpu hotplugging code in the process.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/mach-bf561/hotplug.c b/arch/blackfin/mach-bf561/hotplug.c
index 4cd3b28..42fc085 100644
--- a/arch/blackfin/mach-bf561/hotplug.c
+++ b/arch/blackfin/mach-bf561/hotplug.c
@@ -5,30 +5,27 @@
* Licensed under the GPL-2 or later.
*/
+#include <linux/smp.h>
#include <asm/blackfin.h>
-#include <asm/irq.h>
-#include <asm/smp.h>
-
-#define SIC_SYSIRQ(irq) (irq - (IRQ_CORETMR + 1))
+#include <mach/pll.h>
int hotplug_coreb;
void platform_cpu_die(void)
{
- unsigned long iwr[2] = {0, 0};
- unsigned long bank = SIC_SYSIRQ(IRQ_SUPPLE_0) / 32;
- unsigned long bit = 1 << (SIC_SYSIRQ(IRQ_SUPPLE_0) % 32);
-
+ unsigned long iwr;
hotplug_coreb = 1;
- iwr[bank] = bit;
-
/* disable core timer */
bfin_write_TCNTL(0);
- /* clear ipi interrupt IRQ_SUPPLE_0 */
+ /* clear ipi interrupt IRQ_SUPPLE_0 of CoreB */
bfin_write_SICB_SYSCR(bfin_read_SICB_SYSCR() | (1 << (10 + 1)));
SSYNC();
- coreb_sleep(iwr[0], iwr[1], 0);
+ /* set CoreB wakeup by ipi0, iwr will be discarded */
+ bfin_iwr_set_sup0(&iwr, &iwr, &iwr);
+ SSYNC();
+
+ coreb_die();
}