[PATCH v4 2/2] dt-bindings: net: wireless: mt76: clarify backoff limit usage

[Ryder Lee]

Clarify the usage of path backoff limit properties in mt76 binding.
Add explicit documentation for old generation (mt7915, mt7916, mt7981,
mt7986) and new generation (mt7990, mt7992, mt7996) devices, including
the difference in beamforming and non-beamforming entries.

Rephrase the paths-ru/paths-ru-bf description to reflect the actual
usage.

Co-developed-by: Allen Ye <allen.ye at mediatek.com>
Signed-off-by: Allen Ye <allen.ye at mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee at mediatek.com>
---
v1-v3: none

v4:
- revise commit message
- use PCI id as the compatible string to replace "connac2/3"
---
 .../bindings/net/wireless/mediatek,mt76.yaml  | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/wireless/mediatek,mt76.yaml b/Documentation/devicetree/bindings/net/wireless/mediatek,mt76.yaml
index ae6b97cdc..ccb31cf76 100644
--- a/Documentation/devicetree/bindings/net/wireless/mediatek,mt76.yaml
+++ b/Documentation/devicetree/bindings/net/wireless/mediatek,mt76.yaml
@@ -27,6 +27,11 @@ properties:
       - mediatek,mt7622-wmac
       - mediatek,mt7981-wmac
       - mediatek,mt7986-wmac
+      - pci14c3,7915 #mt7915
+      - pci14c3,7906 #mt7916
+      - pci14c3,7990 #mt7996
+      - pci14c3,7992 #mt7992
+      - pci14c3,7993 #mt7990
 
   reg:
     minItems: 1
@@ -252,6 +257,14 @@ properties:
                       followed by 10 power limit values. The order of the
                       channel resource unit settings is RU26, RU52, RU106,
                       RU242/SU20, RU484/SU40, RU996/SU80 and RU2x996/SU160.
+                      - For mt7981/mt7986/mt7915/mt7916
+                        - Beamforming entries for BW20~BW160 and OFDM do not
+                          include 1T1ss.
+                        - When 1T1ss is not used, it should be filled with 0.
+                      - For mt7996/mt7992/mt7990
+                        - Beamforming entries for BW20~BW160 and RU include
+                          1T1ss, but OFDM does not include 1T1ss.
+                        - 1T1ss is taken into account, so no need to fill with 0.
                     minItems: 1
                     maxItems: 7
                     items:
@@ -270,6 +283,14 @@ properties:
                       followed by 10 power limit values. The order of the
                       channel resource unit settings is RU26, RU52, RU106,
                       RU242/SU20, RU484/SU40, RU996/SU80 and RU2x996/SU160.
+                      - For mt7981/mt7986/mt7915/mt7916
+                        - Beamforming entries for BW20~BW160 and OFDM do not
+                          include 1T1ss.
+                        - When 1T1ss is not used, it should be filled with 0.
+                      - For mt7996/mt7992/mt7990
+                        - Beamforming entries for BW20~BW160 and RU include
+                          1T1ss, but OFDM does not include 1T1ss.
+                        - 1T1ss is taken into account, so no need to fill with 0.
                     minItems: 1
                     maxItems: 7
                     items:
-- 
2.45.2