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Diffstat (limited to 'arch/arm/mach-tegra/sleep.S')
-rw-r--r--arch/arm/mach-tegra/sleep.S23
1 files changed, 22 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/sleep.S b/arch/arm/mach-tegra/sleep.S
index 26afa7cbed11..364d84523fba 100644
--- a/arch/arm/mach-tegra/sleep.S
+++ b/arch/arm/mach-tegra/sleep.S
@@ -34,7 +34,10 @@
#include "flowctrl.h"
#include "sleep.h"
-#ifdef CONFIG_PM_SLEEP
+#define CLK_RESET_CCLK_BURST 0x20
+#define CLK_RESET_CCLK_DIVIDER 0x24
+
+#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_PM_SLEEP)
/*
* tegra_disable_clean_inv_dcache
*
@@ -60,7 +63,9 @@ ENTRY(tegra_disable_clean_inv_dcache)
ldmfd sp!, {r0, r4-r5, r7, r9-r11, pc}
ENDPROC(tegra_disable_clean_inv_dcache)
+#endif
+#ifdef CONFIG_PM_SLEEP
/*
* tegra_sleep_cpu_finish(unsigned long v2p)
*
@@ -108,4 +113,20 @@ ENTRY(tegra_shut_off_mmu)
mov pc, r0
ENDPROC(tegra_shut_off_mmu)
.popsection
+
+/*
+ * tegra_switch_cpu_to_pllp
+ *
+ * In LP2 the normal cpu clock pllx will be turned off. Switch the CPU to pllp
+ */
+ENTRY(tegra_switch_cpu_to_pllp)
+ /* in LP2 idle (SDRAM active), set the CPU burst policy to PLLP */
+ mov32 r5, TEGRA_CLK_RESET_BASE
+ mov r0, #(2 << 28) @ burst policy = run mode
+ orr r0, r0, #(4 << 4) @ use PLLP in run mode burst
+ str r0, [r5, #CLK_RESET_CCLK_BURST]
+ mov r0, #0
+ str r0, [r5, #CLK_RESET_CCLK_DIVIDER]
+ mov pc, lr
+ENDPROC(tegra_switch_cpu_to_pllp)
#endif