diff options
Diffstat (limited to 'arch/arm/mach-tegra/sleep.S')
| -rw-r--r-- | arch/arm/mach-tegra/sleep.S | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/sleep.S b/arch/arm/mach-tegra/sleep.S index addae357da3f..364d84523fba 100644 --- a/arch/arm/mach-tegra/sleep.S +++ b/arch/arm/mach-tegra/sleep.S @@ -34,6 +34,9 @@ #include "flowctrl.h" #include "sleep.h" +#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 @@ -110,4 +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 |