1 files changed, 13 insertions, 1 deletions

diff --git a/arch/arm/plat-omap/include/plat/clock.h b/arch/arm/plat-omap/include/plat/clock.h
index be69f5cac32d..dcd7bb81420d 100644
--- a/arch/arm/plat-omap/include/plat/clock.h
+++ b/arch/arm/plat-omap/include/plat/clock.h
@@ -176,12 +176,24 @@ struct dpll_data {
 
 #endif
 
-/* struct clk.flags possibilities */
+/*
+ * struct clk.flags possibilities
+ *
+ * XXX document the rest of the clock flags here
+ *
+ * CLOCK_CLKOUTX2: (OMAP4 only) DPLL CLKOUT and CLKOUTX2 GATE_CTRL
+ *     bits share the same register.  This flag allows the
+ *     omap4_dpllmx*() code to determine which GATE_CTRL bit field
+ *     should be used.  This is a temporary solution - a better approach
+ *     would be to associate clock type-specific data with the clock,
+ *     similar to the struct dpll_data approach.
+ */
 #define ENABLE_REG_32BIT        (1 << 0)        /* Use 32-bit access */
 #define CLOCK_IDLE_CONTROL      (1 << 1)
 #define CLOCK_NO_IDLE_PARENT    (1 << 2)
 #define ENABLE_ON_INIT          (1 << 3)        /* Enable upon framework init */
 #define INVERT_ENABLE           (1 << 4)        /* 0 enables, 1 disables */
+#define CLOCK_CLKOUTX2          (1 << 5)
 
 /**
  * struct clk - OMAP struct clk