+/* v1.2 device - SDCA address mapping */

Can you please add description of bits used by each field here,
something like we have done for DevId

were you referring to something like this?

 * Spec definition
 *   Register           Bit     Contents
 *   DevId_0 [7:4]      47:44   sdw_version
 *   DevId_0 [3:0]      43:40   unique_id
 *   DevId_1            39:32   mfg_id [15:8]
 *   DevId_2            31:24   mfg_id [7:0]
 *   DevId_3            23:16   part_id [15:8]
 *   DevId_4            15:08   part_id [7:0]
 *   DevId_5            07:00   class_id


+#define SDW_SDCA_CTL(fun, ent, ctl, ch)                (BIT(30) |              
        \
+                                                (((fun) & 0x7) << 22) |      \
+                                                (((ent) & 0x40) << 15) |     \
+                                                (((ent) & 0x3f) << 7) |      \
+                                                (((ctl) & 0x30) << 15) |     \
+                                                (((ctl) & 0x0f) << 3) |      \
+                                                (((ch) & 0x38) << 12) |      \
+                                                ((ch) & 0x07))

GENMASK() for the bitmaps here please. Also it would look very neat by
using FIELD_PREP() here, you can skip the bit shifts and they would be
done by FIELD_PREP() for you.

ok.

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