1 files changed, 13 insertions, 3 deletions

diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index 67a90708b682..a5b9bcd6b108 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -214,6 +214,15 @@ void __init omap_map_sram(void)
                 base = OMAP3_SRAM_PA;
                 base = ROUND_DOWN(base, PAGE_SIZE);
                 omap_sram_io_desc[0].pfn = __phys_to_pfn(base);
+
+                /*
+                 * SRAM must be marked as non-cached on OMAP3 since the
+                 * CORE DPLL M2 divider change code (in SRAM) runs with the
+                 * SDRAM controller disabled, and if it is marked cached,
+                 * the ARM may attempt to write cache lines back to SDRAM
+                 * which will cause the system to hang.
+                 */
+                omap_sram_io_desc[0].type = MT_MEMORY_NONCACHED;
         }
 
         if (cpu_is_omap44xx()) {
@@ -362,14 +371,15 @@ static inline int omap243x_sram_init(void)
 static u32 (*_omap3_sram_configure_core_dpll)(u32 sdrc_rfr_ctrl,
                                               u32 sdrc_actim_ctrla,
                                               u32 sdrc_actim_ctrlb,
-                                              u32 m2);
+                                              u32 m2, u32 unlock_dll);
 u32 omap3_configure_core_dpll(u32 sdrc_rfr_ctrl, u32 sdrc_actim_ctrla,
-                              u32 sdrc_actim_ctrlb, u32 m2)
+                              u32 sdrc_actim_ctrlb, u32 m2, u32 unlock_dll)
 {
         BUG_ON(!_omap3_sram_configure_core_dpll);
         return _omap3_sram_configure_core_dpll(sdrc_rfr_ctrl,
                                                sdrc_actim_ctrla,
-                                               sdrc_actim_ctrlb, m2);
+                                               sdrc_actim_ctrlb, m2,
+                                               unlock_dll);
 }
 
 /* REVISIT: Should this be same as omap34xx_sram_init() after off-idle? */