From: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
As there is no Power management unit on this board, it is not possible to power
down a core, just WFI is allowed. There is no point to invalidate the cache and
exit coherency.
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Reviewed-and-tested-by: Soren Brinkmann <soren.brinkmann@xxxxxxxxxx>
---
arch/arm/mach-zynq/hotplug.c | 32 +-------------------------------
1 file changed, 1 insertion(+), 31 deletions(-)
diff --git a/arch/arm/mach-zynq/hotplug.c b/arch/arm/mach-zynq/hotplug.c
index 5052c70326e4..366f46c91365 100644
--- a/arch/arm/mach-zynq/hotplug.c
+++ b/arch/arm/mach-zynq/hotplug.c
@@ -10,35 +10,7 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/smp.h>
-
-#include <asm/cacheflush.h>
-#include <asm/cp15.h>
-#include "common.h"
-
-static inline void zynq_cpu_enter_lowpower(void)
-{
- unsigned int v;
-
- flush_cache_all();
- asm volatile(
- " mcr p15, 0, %1, c7, c5, 0\n"
- " dsb\n"
- /*
- * Turn off coherency
- */
- " mrc p15, 0, %0, c1, c0, 1\n"
- " bic %0, %0, #0x40\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- " mrc p15, 0, %0, c1, c0, 0\n"
- " bic %0, %0, %2\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- : "=&r" (v)
- : "r" (0), "Ir" (CR_C)
- : "cc");
-}
+#include <asm/proc-fns.h>
/*
* platform-specific code to shutdown a CPU
@@ -47,8 +19,6 @@ static inline void zynq_cpu_enter_lowpower(void)
*/
void zynq_platform_cpu_die(unsigned int cpu)
{
- zynq_cpu_enter_lowpower();
-
/*
* there is no power-control hardware on this platform, so all
* we can do is put the core into WFI; this is safe as the calling
--
2.0.1.1.gfbfc394
--
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