4 files changed, 33 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/prm2xxx.c b/arch/arm/mach-omap2/prm2xxx.c
index e2860f9c111d..1f777bf2bc8f 100644
--- a/arch/arm/mach-omap2/prm2xxx.c
+++ b/arch/arm/mach-omap2/prm2xxx.c
@@ -69,6 +69,20 @@ static u32 omap2xxx_prm_read_reset_sources(void)
         return r;
 }
 
+/**
+ * omap2xxx_prm_dpll_reset - use DPLL reset to reboot the OMAP SoC
+ *
+ * Set the DPLL reset bit, which should reboot the SoC.  This is the
+ * recommended way to restart the SoC.  No return value.
+ */
+void omap2xxx_prm_dpll_reset(void)
+{
+        omap2_prm_set_mod_reg_bits(OMAP_RST_DPLL3_MASK, WKUP_MOD,
+                                   OMAP2_RM_RSTCTRL);
+        /* OCP barrier */
+        omap2_prm_read_mod_reg(WKUP_MOD, OMAP2_RM_RSTCTRL);
+}
+
 int omap2xxx_clkdm_sleep(struct clockdomain *clkdm)
 {
         omap2_prm_set_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
diff --git a/arch/arm/mach-omap2/prm2xxx.h b/arch/arm/mach-omap2/prm2xxx.h
index 1d97112524f1..fe8a14f190ab 100644
--- a/arch/arm/mach-omap2/prm2xxx.h
+++ b/arch/arm/mach-omap2/prm2xxx.h
@@ -124,6 +124,8 @@
 extern int omap2xxx_clkdm_sleep(struct clockdomain *clkdm);
 extern int omap2xxx_clkdm_wakeup(struct clockdomain *clkdm);
 
+extern void omap2xxx_prm_dpll_reset(void);
+
 extern int __init prm2xxx_init(void);
 extern int __exit prm2xxx_exit(void);
 
diff --git a/arch/arm/mach-omap2/prm3xxx.c b/arch/arm/mach-omap2/prm3xxx.c
index 1fea656b2ca8..5435673ac9ce 100644
--- a/arch/arm/mach-omap2/prm3xxx.c
+++ b/arch/arm/mach-omap2/prm3xxx.c
@@ -123,6 +123,21 @@ u32 omap3_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset)
 }
 
 /**
+ * omap3xxx_prm_dpll3_reset - use DPLL3 reset to reboot the OMAP SoC
+ *
+ * Set the DPLL3 reset bit, which should reboot the SoC.  This is the
+ * recommended way to restart the SoC, considering Errata i520.  No
+ * return value.
+ */
+void omap3xxx_prm_dpll3_reset(void)
+{
+        omap2_prm_set_mod_reg_bits(OMAP_RST_DPLL3_MASK, OMAP3430_GR_MOD,
+                                   OMAP2_RM_RSTCTRL);
+        /* OCP barrier */
+        omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP2_RM_RSTCTRL);
+}
+
+/**
  * omap3xxx_prm_read_pending_irqs - read pending PRM MPU IRQs into @events
  * @events: ptr to a u32, preallocated by caller
  *
diff --git a/arch/arm/mach-omap2/prm3xxx.h b/arch/arm/mach-omap2/prm3xxx.h
index a3c28a875410..10cd41a8129e 100644
--- a/arch/arm/mach-omap2/prm3xxx.h
+++ b/arch/arm/mach-omap2/prm3xxx.h
@@ -152,6 +152,8 @@ extern void omap3xxx_prm_ocp_barrier(void);
 extern void omap3xxx_prm_save_and_clear_irqen(u32 *saved_mask);
 extern void omap3xxx_prm_restore_irqen(u32 *saved_mask);
 
+extern void omap3xxx_prm_dpll3_reset(void);
+
 extern u32 omap3xxx_prm_get_reset_sources(void);
 
 #endif /* __ASSEMBLER */