hdata: Explain what the xscom node bus-frequency is
Vague documentation is about as annoying as no documentation.
@@ -281,7 +281,10 @@ static struct dt_node *add_xscom_node(uint64_t base, uint32_t hw_id,
}
dt_add_property_u64s(node, "reg", addr, size);
- /* Derive bus frquency */
+ /*
+ * The bus-frequency of the xscom node is actually the PIB/PCB
+ * frequency. It is derived from the nest-clock via a 4:1 divider
+ */
freq = dt_prop_get_u64_def(dt_root, "nest-frequency", 0);
freq /= 4;
if (freq)
