dt-bindings: display: panel: constrain 'reg' in DSI panels

DSI-attached devices could respond to more than one virtual channel
number, thus their bindings are supposed to constrain the 'reg' property
to match hardware.  Add missing 'reg' constrain for DSI-attached display
panels, based on DTS sources in Linux kernel (assume all devices take
only one channel number).

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240509-dt-bindings-dsi-panel-reg-v1-3-8b2443705be0@linaro.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

40 files changed, 120 insertions, 41 deletions

diff --git a/Documentation/devicetree/bindings/display/panel/asus,z00t-tm5p5-nt35596.yaml b/Documentation/devicetree/bindings/display/panel/asus,z00t-tm5p5-nt35596.yaml
index 75a09df68ba0..2399cabf044c 100644
--- a/Documentation/devicetree/bindings/display/panel/asus,z00t-tm5p5-nt35596.yaml
+++ b/Documentation/devicetree/bindings/display/panel/asus,z00t-tm5p5-nt35596.yaml
@@ -21,7 +21,10 @@ allOf:
 properties:
   compatible:
     const: asus,z00t-tm5p5-n35596
-  reg: true
+
+  reg:
+    maxItems: 1
+
   reset-gpios: true
   vdd-supply:
     description: core voltage supply
diff --git a/Documentation/devicetree/bindings/display/panel/boe,bf060y8m-aj0.yaml b/Documentation/devicetree/bindings/display/panel/boe,bf060y8m-aj0.yaml
index a8f3afa922c8..8b7448ad9138 100644
--- a/Documentation/devicetree/bindings/display/panel/boe,bf060y8m-aj0.yaml
+++ b/Documentation/devicetree/bindings/display/panel/boe,bf060y8m-aj0.yaml
@@ -26,6 +26,9 @@ properties:
   compatible:
     const: boe,bf060y8m-aj0
 
+  reg:
+    maxItems: 1
+
   elvdd-supply:
     description: EL Driving positive (VDD) supply (4.40-4.80V)
   elvss-supply:
@@ -38,7 +41,6 @@ properties:
     description: I/O voltage supply (1.62-1.98V)
 
   port: true
-  reg: true
   reset-gpios: true
 
 required:
diff --git a/Documentation/devicetree/bindings/display/panel/boe,himax8279d.yaml b/Documentation/devicetree/bindings/display/panel/boe,himax8279d.yaml
index 272a3a018a33..f2496cdd9260 100644
--- a/Documentation/devicetree/bindings/display/panel/boe,himax8279d.yaml
+++ b/Documentation/devicetree/bindings/display/panel/boe,himax8279d.yaml
@@ -18,9 +18,11 @@ properties:
       - const: boe,himax8279d8p
       - const: boe,himax8279d10p
 
+  reg:
+    maxItems: 1
+
   backlight: true
   enable-gpios: true
-  reg: true
 
   pp33-gpios:
     maxItems: 1
diff --git a/Documentation/devicetree/bindings/display/panel/boe,th101mb31ig002-28a.yaml b/Documentation/devicetree/bindings/display/panel/boe,th101mb31ig002-28a.yaml
index 32df26cbfeed..5eaccce13c21 100644
--- a/Documentation/devicetree/bindings/display/panel/boe,th101mb31ig002-28a.yaml
+++ b/Documentation/devicetree/bindings/display/panel/boe,th101mb31ig002-28a.yaml
@@ -18,7 +18,9 @@ properties:
         # BOE TH101MB31IG002-28A 10.1" WXGA TFT LCD panel
       - boe,th101mb31ig002-28a
 
-  reg: true
+  reg:
+    maxItems: 1
+
   backlight: true
   enable-gpios: true
   power-supply: true
diff --git a/Documentation/devicetree/bindings/display/panel/boe,tv101wum-nl6.yaml b/Documentation/devicetree/bindings/display/panel/boe,tv101wum-nl6.yaml
index 906ef62709b8..9e603cad1348 100644
--- a/Documentation/devicetree/bindings/display/panel/boe,tv101wum-nl6.yaml
+++ b/Documentation/devicetree/bindings/display/panel/boe,tv101wum-nl6.yaml
@@ -38,7 +38,7 @@ properties:
       - starry,ili9882t
 
   reg:
-    description: the virtual channel number of a DSI peripheral
+    maxItems: 1
 
   enable-gpios:
     description: a GPIO spec for the enable pin
diff --git a/Documentation/devicetree/bindings/display/panel/elida,kd35t133.yaml b/Documentation/devicetree/bindings/display/panel/elida,kd35t133.yaml
index 265ab6d30572..f4cb825d1e96 100644
--- a/Documentation/devicetree/bindings/display/panel/elida,kd35t133.yaml
+++ b/Documentation/devicetree/bindings/display/panel/elida,kd35t133.yaml
@@ -15,7 +15,10 @@ allOf:
 properties:
   compatible:
     const: elida,kd35t133
-  reg: true
+
+  reg:
+    maxItems: 1
+
   backlight: true
   port: true
   reset-gpios: true
diff --git a/Documentation/devicetree/bindings/display/panel/feixin,k101-im2ba02.yaml b/Documentation/devicetree/bindings/display/panel/feixin,k101-im2ba02.yaml
index 81adb82f061d..0d8707a5844d 100644
--- a/Documentation/devicetree/bindings/display/panel/feixin,k101-im2ba02.yaml
+++ b/Documentation/devicetree/bindings/display/panel/feixin,k101-im2ba02.yaml
@@ -15,7 +15,10 @@ allOf:
 properties:
   compatible:
     const: feixin,k101-im2ba02
-  reg: true
+
+  reg:
+    maxItems: 1
+
   backlight: true
   reset-gpios: true
   avdd-supply:
diff --git a/Documentation/devicetree/bindings/display/panel/himax,hx83112a.yaml b/Documentation/devicetree/bindings/display/panel/himax,hx83112a.yaml
index 174661d13811..56bcd152f43c 100644
--- a/Documentation/devicetree/bindings/display/panel/himax,hx83112a.yaml
+++ b/Documentation/devicetree/bindings/display/panel/himax,hx83112a.yaml
@@ -21,6 +21,9 @@ properties:
     contains:
       const: djn,9a-3r063-1102b
 
+  reg:
+    maxItems: 1
+
   vdd1-supply:
     description: Digital voltage rail
 
@@ -30,7 +33,6 @@ properties:
   vsp-supply:
     description: Negative source voltage rail
 
-  reg: true
   port: true
 
 required:
diff --git a/Documentation/devicetree/bindings/display/panel/himax,hx8394.yaml b/Documentation/devicetree/bindings/display/panel/himax,hx8394.yaml
index 916bb7f94206..644387e4fb6f 100644
--- a/Documentation/devicetree/bindings/display/panel/himax,hx8394.yaml
+++ b/Documentation/devicetree/bindings/display/panel/himax,hx8394.yaml
@@ -26,7 +26,8 @@ properties:
           - powkiddy,x55-panel
       - const: himax,hx8394
 
-  reg: true
+  reg:
+    maxItems: 1
 
   reset-gpios: true
 
diff --git a/Documentation/devicetree/bindings/display/panel/ilitek,ili9805.yaml b/Documentation/devicetree/bindings/display/panel/ilitek,ili9805.yaml
index f4f91f93f490..ff67129c9466 100644
--- a/Documentation/devicetree/bindings/display/panel/ilitek,ili9805.yaml
+++ b/Documentation/devicetree/bindings/display/panel/ilitek,ili9805.yaml
@@ -20,9 +20,11 @@ properties:
           - tianma,tm041xdhg01
       - const: ilitek,ili9805
 
+  reg:
+    maxItems: 1
+
   avdd-supply: true
   dvdd-supply: true
-  reg: true
 
 required:
   - compatible
diff --git a/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml b/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml
index b1e624be3e33..ac226d5b2c1e 100644
--- a/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml
+++ b/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml
@@ -23,9 +23,11 @@ properties:
           - wanchanglong,w552946aba
       - const: ilitek,ili9881c
 
+  reg:
+    maxItems: 1
+
   backlight: true
   power-supply: true
-  reg: true
   reset-gpios: true
   rotation: true
 
diff --git a/Documentation/devicetree/bindings/display/panel/innolux,p097pfg.yaml b/Documentation/devicetree/bindings/display/panel/innolux,p097pfg.yaml
index 5a5f071627fb..4164e3f7061d 100644
--- a/Documentation/devicetree/bindings/display/panel/innolux,p097pfg.yaml
+++ b/Documentation/devicetree/bindings/display/panel/innolux,p097pfg.yaml
@@ -16,9 +16,11 @@ properties:
   compatible:
     const: innolux,p097pfg
 
+  reg:
+    maxItems: 1
+
   backlight: true
   enable-gpios: true
-  reg: true
 
   avdd-supply:
     description: The regulator that provides positive voltage
diff --git a/Documentation/devicetree/bindings/display/panel/jadard,jd9365da-h3.yaml b/Documentation/devicetree/bindings/display/panel/jadard,jd9365da-h3.yaml
index 41eb7fbf7715..20afdb4568a2 100644
--- a/Documentation/devicetree/bindings/display/panel/jadard,jd9365da-h3.yaml
+++ b/Documentation/devicetree/bindings/display/panel/jadard,jd9365da-h3.yaml
@@ -21,7 +21,8 @@ properties:
           - radxa,display-8hd-ad002
       - const: jadard,jd9365da-h3
 
-  reg: true
+  reg:
+    maxItems: 1
 
   vdd-supply:
     description: supply regulator for VDD, usually 3.3V
diff --git a/Documentation/devicetree/bindings/display/panel/jdi,lpm102a188a.yaml b/Documentation/devicetree/bindings/display/panel/jdi,lpm102a188a.yaml
index 2f4d27a309a7..a8621459005b 100644
--- a/Documentation/devicetree/bindings/display/panel/jdi,lpm102a188a.yaml
+++ b/Documentation/devicetree/bindings/display/panel/jdi,lpm102a188a.yaml
@@ -26,7 +26,9 @@ properties:
   compatible:
     const: jdi,lpm102a188a
 
-  reg: true
+  reg:
+    maxItems: 1
+
   enable-gpios: true
   reset-gpios: true
   power-supply: true
diff --git a/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.yaml b/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.yaml
index 63c82a4378ff..0c8b5cb78bfe 100644
--- a/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.yaml
+++ b/Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.yaml
@@ -16,8 +16,10 @@ properties:
   compatible:
     const: jdi,lt070me05000
 
+  reg:
+    maxItems: 1
+
   enable-gpios: true
-  reg: true
   reset-gpios: true
 
   vddp-supply:
diff --git a/Documentation/devicetree/bindings/display/panel/leadtek,ltk050h3146w.yaml b/Documentation/devicetree/bindings/display/panel/leadtek,ltk050h3146w.yaml
index a40ab887ada7..e2a2dd4ef5fa 100644
--- a/Documentation/devicetree/bindings/display/panel/leadtek,ltk050h3146w.yaml
+++ b/Documentation/devicetree/bindings/display/panel/leadtek,ltk050h3146w.yaml
@@ -18,7 +18,10 @@ properties:
       - leadtek,ltk050h3146w
       - leadtek,ltk050h3146w-a2
       - leadtek,ltk050h3148w
-  reg: true
+
+  reg:
+    maxItems: 1
+
   backlight: true
   reset-gpios: true
   iovcc-supply:
diff --git a/Documentation/devicetree/bindings/display/panel/leadtek,ltk500hd1829.yaml b/Documentation/devicetree/bindings/display/panel/leadtek,ltk500hd1829.yaml
index d589f1677214..af9e0ea0e72f 100644
--- a/Documentation/devicetree/bindings/display/panel/leadtek,ltk500hd1829.yaml
+++ b/Documentation/devicetree/bindings/display/panel/leadtek,ltk500hd1829.yaml
@@ -17,7 +17,10 @@ properties:
     enum:
       - leadtek,ltk101b4029w
       - leadtek,ltk500hd1829
-  reg: true
+
+  reg:
+    maxItems: 1
+
   backlight: true
   reset-gpios: true
   iovcc-supply:
diff --git a/Documentation/devicetree/bindings/display/panel/newvision,nv3051d.yaml b/Documentation/devicetree/bindings/display/panel/newvision,nv3051d.yaml
index 7a634fbc465e..d3a25a8fd7e3 100644
--- a/Documentation/devicetree/bindings/display/panel/newvision,nv3051d.yaml
+++ b/Documentation/devicetree/bindings/display/panel/newvision,nv3051d.yaml
@@ -24,7 +24,9 @@ properties:
           - powkiddy,rk2023-panel
       - const: newvision,nv3051d
 
-  reg: true
+  reg:
+    maxItems: 1
+
   backlight: true
   port: true
   reset-gpios:
diff --git a/Documentation/devicetree/bindings/display/panel/novatek,nt35510.yaml b/Documentation/devicetree/bindings/display/panel/novatek,nt35510.yaml
index 91921f4b0e5f..bb50fd5506c3 100644
--- a/Documentation/devicetree/bindings/display/panel/novatek,nt35510.yaml
+++ b/Documentation/devicetree/bindings/display/panel/novatek,nt35510.yaml
@@ -24,7 +24,10 @@ properties:
       string determines how the NT35510 panel driver shall be configured
       to work with the indicated panel. The novatek,nt35510 compatible shall
       always be provided as a fallback.
-  reg: true
+
+  reg:
+    maxItems: 1
+
   reset-gpios: true
   vdd-supply:
     description: regulator that supplies the vdd voltage
diff --git a/Documentation/devicetree/bindings/display/panel/novatek,nt35950.yaml b/Documentation/devicetree/bindings/display/panel/novatek,nt35950.yaml
index 377a05d48a02..52cee4ee84b4 100644
--- a/Documentation/devicetree/bindings/display/panel/novatek,nt35950.yaml
+++ b/Documentation/devicetree/bindings/display/panel/novatek,nt35950.yaml
@@ -33,6 +33,9 @@ properties:
       to work with the indicated panel. The novatek,nt35950 compatible shall
       always be provided as a fallback.
 
+  reg:
+    maxItems: 1
+
   reset-gpios:
     maxItems: 1
     description: phandle of gpio for reset line - This should be 8mA, gpio
@@ -49,7 +52,6 @@ properties:
 
   backlight: true
   ports: true
-  reg: true
 
 required:
   - compatible
diff --git a/Documentation/devicetree/bindings/display/panel/novatek,nt36523.yaml b/Documentation/devicetree/bindings/display/panel/novatek,nt36523.yaml
index 5f7e4c486094..0447ee724947 100644
--- a/Documentation/devicetree/bindings/display/panel/novatek,nt36523.yaml
+++ b/Documentation/devicetree/bindings/display/panel/novatek,nt36523.yaml
@@ -30,6 +30,9 @@ properties:
               - lenovo,j606f-boe-nt36523w
           - const: novatek,nt36523w
 
+  reg:
+    maxItems: 1
+
   reset-gpios:
     maxItems: 1
     description: phandle of gpio for reset line - This should be 8mA
@@ -37,7 +40,6 @@ properties:
   vddio-supply:
     description: regulator that supplies the I/O voltage
 
-  reg: true
   ports: true
   rotation: true
   backlight: true
diff --git a/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml b/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml
index ae821f465e1c..800a2f0a4dad 100644
--- a/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml
+++ b/Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml
@@ -29,6 +29,9 @@ properties:
       determines how the NT36672A panel driver is configured for the indicated
       panel. The novatek,nt36672a compatible shall always be provided as a fallback.
 
+  reg:
+    maxItems: 1
+
   reset-gpios:
     maxItems: 1
     description: phandle of gpio for reset line - This should be 8mA, gpio
@@ -44,7 +47,6 @@ properties:
   vddneg-supply:
     description: phandle of the negative boost supply regulator
 
-  reg: true
   port: true
   backlight: true
 
diff --git a/Documentation/devicetree/bindings/display/panel/olimex,lcd-olinuxino.yaml b/Documentation/devicetree/bindings/display/panel/olimex,lcd-olinuxino.yaml
index 72463795e4c6..e5d8785fdf90 100644
--- a/Documentation/devicetree/bindings/display/panel/olimex,lcd-olinuxino.yaml
+++ b/Documentation/devicetree/bindings/display/panel/olimex,lcd-olinuxino.yaml
@@ -38,10 +38,12 @@ properties:
   compatible:
     const: olimex,lcd-olinuxino
 
+  reg:
+    maxItems: 1
+
   backlight: true
   enable-gpios: true
   power-supply: true
-  reg: true
 
 required:
   - compatible
diff --git a/Documentation/devicetree/bindings/display/panel/raydium,rm67191.yaml b/Documentation/devicetree/bindings/display/panel/raydium,rm67191.yaml
index d62fd692bf10..4825792bf712 100644
--- a/Documentation/devicetree/bindings/display/panel/raydium,rm67191.yaml
+++ b/Documentation/devicetree/bindings/display/panel/raydium,rm67191.yaml
@@ -16,7 +16,9 @@ properties:
   compatible:
     const: raydium,rm67191
 
-  reg: true
+  reg:
+    maxItems: 1
+
   port: true
   reset-gpios: true
   width-mm: true
diff --git a/Documentation/devicetree/bindings/display/panel/raydium,rm692e5.yaml b/Documentation/devicetree/bindings/display/panel/raydium,rm692e5.yaml
index f436ba6738ca..7ad223f98253 100644
--- a/Documentation/devicetree/bindings/display/panel/raydium,rm692e5.yaml
+++ b/Documentation/devicetree/bindings/display/panel/raydium,rm692e5.yaml
@@ -22,6 +22,9 @@ properties:
       - const: fairphone,fp5-rm692e5-boe
       - const: raydium,rm692e5
 
+  reg:
+    maxItems: 1
+
   dvdd-supply:
     description: Digital voltage rail
 
@@ -31,7 +34,6 @@ properties:
   vddio-supply:
     description: I/O voltage rail
 
-  reg: true
   port: true
 
 required:
diff --git a/Documentation/devicetree/bindings/display/panel/ronbo,rb070d30.yaml b/Documentation/devicetree/bindings/display/panel/ronbo,rb070d30.yaml
index 95ce22c6787a..04f86e0cbac9 100644
--- a/Documentation/devicetree/bindings/display/panel/ronbo,rb070d30.yaml
+++ b/Documentation/devicetree/bindings/display/panel/ronbo,rb070d30.yaml
@@ -14,7 +14,7 @@ properties:
     const: ronbo,rb070d30
 
   reg:
-    description: MIPI-DSI virtual channel
+    maxItems: 1
 
   power-gpios:
     description: GPIO used for the power pin
diff --git a/Documentation/devicetree/bindings/display/panel/samsung,amoled-mipi-dsi.yaml b/Documentation/devicetree/bindings/display/panel/samsung,amoled-mipi-dsi.yaml
index ccc482570d6a..e8f9e9d06a29 100644
--- a/Documentation/devicetree/bindings/display/panel/samsung,amoled-mipi-dsi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/samsung,amoled-mipi-dsi.yaml
@@ -33,7 +33,9 @@ properties:
         # Samsung S6E3HF2 5.65" 1600x2560 AMOLED panel
       - samsung,s6e3hf2
 
-  reg: true
+  reg:
+    maxItems: 1
+
   reset-gpios: true
   enable-gpios: true
   te-gpios: true
diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6d16d0.yaml b/Documentation/devicetree/bindings/display/panel/samsung,s6d16d0.yaml
index 66d147496bc3..2af5bc47323f 100644
--- a/Documentation/devicetree/bindings/display/panel/samsung,s6d16d0.yaml
+++ b/Documentation/devicetree/bindings/display/panel/samsung,s6d16d0.yaml
@@ -16,8 +16,10 @@ properties:
   compatible:
     const: samsung,s6d16d0
 
+  reg:
+    maxItems: 1
+
   port: true
-  reg: true
   reset-gpios: true
 
   vdd1-supply:
diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6d7aa0.yaml b/Documentation/devicetree/bindings/display/panel/samsung,s6d7aa0.yaml
index 45a236d2cc70..939da65114bf 100644
--- a/Documentation/devicetree/bindings/display/panel/samsung,s6d7aa0.yaml
+++ b/Documentation/devicetree/bindings/display/panel/samsung,s6d7aa0.yaml
@@ -24,7 +24,8 @@ properties:
           - samsung,ltl101at01
       - const: samsung,s6d7aa0
 
-  reg: true
+  reg:
+    maxItems: 1
 
   backlight:
     description:
diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6e88a0-ams452ef01.yaml b/Documentation/devicetree/bindings/display/panel/samsung,s6e88a0-ams452ef01.yaml
index b749e9e906b7..42634fc3b5b2 100644
--- a/Documentation/devicetree/bindings/display/panel/samsung,s6e88a0-ams452ef01.yaml
+++ b/Documentation/devicetree/bindings/display/panel/samsung,s6e88a0-ams452ef01.yaml
@@ -15,7 +15,10 @@ allOf:
 properties:
   compatible:
     const: samsung,s6e88a0-ams452ef01
-  reg: true
+
+  reg:
+    maxItems: 1
+
   port: true
   reset-gpios: true
   vdd3-supply:
diff --git a/Documentation/devicetree/bindings/display/panel/samsung,s6e8aa0.yaml b/Documentation/devicetree/bindings/display/panel/samsung,s6e8aa0.yaml
index 200fbf1c74a0..4601fa460680 100644
--- a/Documentation/devicetree/bindings/display/panel/samsung,s6e8aa0.yaml
+++ b/Documentation/devicetree/bindings/display/panel/samsung,s6e8aa0.yaml
@@ -16,7 +16,9 @@ properties:
   compatible:
     const: samsung,s6e8aa0
 
-  reg: true
+  reg:
+    maxItems: 1
+
   reset-gpios: true
   display-timings: true
 
diff --git a/Documentation/devicetree/bindings/display/panel/sharp,lq101r1sx01.yaml b/Documentation/devicetree/bindings/display/panel/sharp,lq101r1sx01.yaml
index 57b44a0e763d..ce820b96a7e2 100644
--- a/Documentation/devicetree/bindings/display/panel/sharp,lq101r1sx01.yaml
+++ b/Documentation/devicetree/bindings/display/panel/sharp,lq101r1sx01.yaml
@@ -37,7 +37,9 @@ properties:
       - enum:
           - sharp,lq101r1sx01
 
-  reg: true
+  reg:
+    maxItems: 1
+
   power-supply: true
   backlight: true
 
diff --git a/Documentation/devicetree/bindings/display/panel/sharp,ls043t1le01.yaml b/Documentation/devicetree/bindings/display/panel/sharp,ls043t1le01.yaml
index a90d0d8bf7c9..b6ea246430ce 100644
--- a/Documentation/devicetree/bindings/display/panel/sharp,ls043t1le01.yaml
+++ b/Documentation/devicetree/bindings/display/panel/sharp,ls043t1le01.yaml
@@ -16,7 +16,9 @@ properties:
   compatible:
     const: sharp,ls043t1le01-qhd
 
-  reg: true
+  reg:
+    maxItems: 1
+
   backlight: true
   reset-gpios: true
   port: true
diff --git a/Documentation/devicetree/bindings/display/panel/sharp,ls060t1sx01.yaml b/Documentation/devicetree/bindings/display/panel/sharp,ls060t1sx01.yaml
index 271c097cc9a4..77a4fce129e7 100644
--- a/Documentation/devicetree/bindings/display/panel/sharp,ls060t1sx01.yaml
+++ b/Documentation/devicetree/bindings/display/panel/sharp,ls060t1sx01.yaml
@@ -16,7 +16,9 @@ properties:
   compatible:
     const: sharp,ls060t1sx01
 
-  reg: true
+  reg:
+    maxItems: 1
+
   backlight: true
   reset-gpios: true
   port: true
diff --git a/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml b/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml
index 059cc6dbcfca..fd778a20f760 100644
--- a/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml
+++ b/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml
@@ -22,7 +22,10 @@ properties:
     enum:
       - sony,acx424akp
       - sony,acx424akm
-  reg: true
+
+  reg:
+    maxItems: 1
+
   reset-gpios: true
   vddi-supply:
     description: regulator that supplies the vddi voltage
diff --git a/Documentation/devicetree/bindings/display/panel/sony,td4353-jdi.yaml b/Documentation/devicetree/bindings/display/panel/sony,td4353-jdi.yaml
index b6b885b4c22d..feca40b0d759 100644
--- a/Documentation/devicetree/bindings/display/panel/sony,td4353-jdi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/sony,td4353-jdi.yaml
@@ -20,7 +20,8 @@ properties:
   compatible:
     const: sony,td4353-jdi-tama
 
-  reg: true
+  reg:
+    maxItems: 1
 
   backlight: true
 
diff --git a/Documentation/devicetree/bindings/display/panel/sony,tulip-truly-nt35521.yaml b/Documentation/devicetree/bindings/display/panel/sony,tulip-truly-nt35521.yaml
index 967972939598..a58a31349757 100644
--- a/Documentation/devicetree/bindings/display/panel/sony,tulip-truly-nt35521.yaml
+++ b/Documentation/devicetree/bindings/display/panel/sony,tulip-truly-nt35521.yaml
@@ -21,7 +21,8 @@ properties:
   compatible:
     const: sony,tulip-truly-nt35521
 
-  reg: true
+  reg:
+    maxItems: 1
 
   positive5-supply:
     description: Positive 5V supply
diff --git a/Documentation/devicetree/bindings/display/panel/synaptics,r63353.yaml b/Documentation/devicetree/bindings/display/panel/synaptics,r63353.yaml
index e5617d125567..2fd6e0ec3682 100644
--- a/Documentation/devicetree/bindings/display/panel/synaptics,r63353.yaml
+++ b/Documentation/devicetree/bindings/display/panel/synaptics,r63353.yaml
@@ -19,15 +19,17 @@ properties:
           - sharp,ls068b3sx02
       - const: syna,r63353
 
+  reg:
+    maxItems: 1
+
   avdd-supply: true
   dvdd-supply: true
-  reg: true
 
 required:
   - compatible
+  - reg
   - avdd-supply
   - dvdd-supply
-  - reg
   - reset-gpios
   - port
   - backlight
diff --git a/Documentation/devicetree/bindings/display/panel/visionox,rm69299.yaml b/Documentation/devicetree/bindings/display/panel/visionox,rm69299.yaml
index 772399067515..30047a62fc11 100644
--- a/Documentation/devicetree/bindings/display/panel/visionox,rm69299.yaml
+++ b/Documentation/devicetree/bindings/display/panel/visionox,rm69299.yaml
@@ -20,7 +20,8 @@ properties:
   compatible:
     const: visionox,rm69299-1080p-display
 
-  reg: true
+  reg:
+    maxItems: 1
 
   vdda-supply:
     description: |
diff --git a/Documentation/devicetree/bindings/display/panel/xinpeng,xpp055c272.yaml b/Documentation/devicetree/bindings/display/panel/xinpeng,xpp055c272.yaml
index c407deb6afb1..9c9743a23500 100644
--- a/Documentation/devicetree/bindings/display/panel/xinpeng,xpp055c272.yaml
+++ b/Documentation/devicetree/bindings/display/panel/xinpeng,xpp055c272.yaml
@@ -15,7 +15,10 @@ allOf:
 properties:
   compatible:
     const: xinpeng,xpp055c272
-  reg: true
+
+  reg:
+    maxItems: 1
+
   backlight: true
   port: true
   reset-gpios: true