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-rw-r--r--arch/arm/mach-tegra/sleep-tegra30.S30
1 files changed, 25 insertions, 5 deletions
diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S
index d29dfcc..ada8821 100644
--- a/arch/arm/mach-tegra/sleep-tegra30.S
+++ b/arch/arm/mach-tegra/sleep-tegra30.S
@@ -19,6 +19,7 @@
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
+#include "fuse.h"
#include "sleep.h"
#include "flowctrl.h"
@@ -43,14 +44,19 @@ ENDPROC(tegra30_hotplug_shutdown)
*
* Puts the current CPU in wait-for-event mode on the flow controller
* and powergates it -- flags (in R0) indicate the request type.
- * Must never be called for CPU 0.
*
- * corrupts r0-r4, r12
+ * r10 = SoC ID
+ * corrupts r0-r4, r10-r12
*/
ENTRY(tegra30_cpu_shutdown)
cpu_id r3
+ tegra_get_soc_id TEGRA_APB_MISC_VIRT, r10
+ cmp r10, #TEGRA30
+ bne _no_cpu0_chk @ It's not Tegra30
+
cmp r3, #0
moveq pc, lr @ Must never be called for CPU 0
+_no_cpu0_chk:
ldr r12, =TEGRA_FLOW_CTRL_VIRT
cpu_to_csr_reg r1, r3
@@ -65,7 +71,9 @@ ENTRY(tegra30_cpu_shutdown)
movw r12, \
FLOW_CTRL_CSR_INTR_FLAG | FLOW_CTRL_CSR_EVENT_FLAG | \
FLOW_CTRL_CSR_ENABLE
- mov r4, #(1 << 4)
+ cmp r10, #TEGRA30
+ moveq r4, #(1 << 4) @ wfe bitmap
+ movne r4, #(1 << 8) @ wfi bitmap
ARM( orr r12, r12, r4, lsl r3 )
THUMB( lsl r4, r4, r3 )
THUMB( orr r12, r12, r4 )
@@ -79,9 +87,20 @@ delay_1:
cpsid a @ disable imprecise aborts.
ldr r3, [r1] @ read CSR
str r3, [r1] @ clear CSR
+
tst r0, #TEGRA30_POWER_HOTPLUG_SHUTDOWN
+ beq flow_ctrl_setting_for_lp2
+
+ /* flow controller set up for hotplug */
+ mov r3, #FLOW_CTRL_WAITEVENT @ For hotplug
+ b flow_ctrl_done
+flow_ctrl_setting_for_lp2:
+ /* flow controller set up for LP2 */
+ cmp r10, #TEGRA30
moveq r3, #FLOW_CTRL_WAIT_FOR_INTERRUPT @ For LP2
- movne r3, #FLOW_CTRL_WAITEVENT @ For hotplug
+ movne r3, #FLOW_CTRL_WAITEVENT
+flow_ctrl_done:
+ cmp r10, #TEGRA30
str r3, [r2]
ldr r0, [r2]
b wfe_war
@@ -89,7 +108,8 @@ delay_1:
__cpu_reset_again:
dsb
.align 5
- wfe @ CPU should be power gated here
+ wfeeq @ CPU should be power gated here
+ wfine
wfe_war:
b __cpu_reset_again
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