+/**
+ * Set polarity for Load, Clk, SI signals.
+ */
+#define SIPO_SET_LD_LEVEL(device, load_pol) do { /* Implement me! */ } while (0)
+#define SIPO_SET_CLK_LEVEL(clock_pol) do { /* Implement me! */ } while (0)
+#define SIPO_SET_SI_LEVEL() do { /* Implement me! */ } while (0)