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kernel
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linux
dt-bindings: display: st: add two new compatibles to LTDC device
The new STMicroelectronics SoC features a display controller similar to
the one used in previous SoCs. Because there is additional registers,
and different mandatory clocks it is incompatible with existing IPs. On
STM32MP251, the device only needs two clocks while on STM32MP255 it
needs four.
Add the new names to the list of compatible string and handle each
quirks accordingly.
Acked-by: Philippe Cornu <philippe.cornu@foss.st.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250822-drm-misc-next-v5-1-9c825e28f733@foss.st.com
Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
+50
-2
+50
-2
Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml
+50
-2
Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml
···
12
12
13
13
properties:
14
14
compatible:
15
-
const: st,stm32-ltdc
15
+
enum:
16
+
- st,stm32-ltdc
17
+
- st,stm32mp251-ltdc
18
+
- st,stm32mp255-ltdc
16
19
17
20
reg:
18
21
maxItems: 1
···
27
24
minItems: 1
28
25
29
26
clocks:
30
-
maxItems: 1
27
+
minItems: 1
28
+
maxItems: 4
31
29
32
30
clock-names:
33
31
items:
34
32
- const: lcd
33
+
- const: bus
34
+
- const: ref
35
+
- const: lvds
36
+
minItems: 1
35
37
36
38
resets:
37
39
maxItems: 1
···
58
50
- clock-names
59
51
- resets
60
52
- port
53
+
54
+
allOf:
55
+
- if:
56
+
properties:
57
+
compatible:
58
+
contains:
59
+
enum:
60
+
- st,stm32-ltdc
61
+
then:
62
+
properties:
63
+
clocks:
64
+
maxItems: 1
65
+
clock-names:
66
+
maxItems: 1
67
+
- if:
68
+
properties:
69
+
compatible:
70
+
contains:
71
+
enum:
72
+
- st,stm32mp251-ltdc
73
+
then:
74
+
properties:
75
+
clocks:
76
+
minItems: 2
77
+
maxItems: 2
78
+
clock-names:
79
+
minItems: 2
80
+
maxItems: 2
81
+
- if:
82
+
properties:
83
+
compatible:
84
+
contains:
85
+
enum:
86
+
- st,stm32mp255-ltdc
87
+
then:
88
+
properties:
89
+
clocks:
90
+
minItems: 4
91
+
clock-names:
92
+
minItems: 4
61
93
62
94
additionalProperties: false
63
95