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ARM: OMAP4: PM: Program CPU1 to hit OFF when off-lined

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Program non-boot CPUs to hit lowest supported power state
when it is off-lined using cpu hotplug framework.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Vishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Santosh Shilimkar
2010-06-16 22:19:48 +05:30
committed by Kevin Hilman
parent a6e48358d1
commit b5b4f2881f
4 changed files with 80 additions and 5 deletions
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14
arch/arm/mach-omap2/omap-hotplug.c
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@@ -22,6 +22,8 @@
#include "common.h"
#include "powerdomain.h"
int platform_cpu_kill(unsigned int cpu)
{
return 1;
@@ -33,6 +35,8 @@ int platform_cpu_kill(unsigned int cpu)
*/
void platform_cpu_die(unsigned int cpu)
{
unsigned int this_cpu;
flush_cache_all();
dsb();
@@ -40,15 +44,15 @@ void platform_cpu_die(unsigned int cpu)
* we're ready for shutdown now, so do it
*/
if (omap_modify_auxcoreboot0(0x0, 0x200) != 0x0)
printk(KERN_CRIT "Secure clear status failed\n");
pr_err("Secure clear status failed\n");
for (;;) {
/*
* Execute WFI
* Enter into low power state
*/
do_wfi();
if (omap_read_auxcoreboot0() == cpu) {
omap4_hotplug_cpu(cpu, PWRDM_POWER_OFF);
this_cpu = smp_processor_id();
if (omap_read_auxcoreboot0() == this_cpu) {
/*
* OK, proper wakeup, we're done
*/