[PATCH v6 1/7] dt-bindings: mfd: stm32-lptimer: add support for stm32mp25

[Fabrice Gasnier <fabrice.gasnier@foss.st.com>]

Add a new stm32mp25 compatible to stm32-lptimer dt-bindings, to support
STM32MP25 SoC. Some features has been updated or added to the low-power
timer:
- new capture compare channels
- up to two PWM channels
- PWM input capture
- peripheral interconnect in stm32mp25 has been updated (new triggers).
- registers/bits has been added or revisited (IER access).
So introduce a new compatible to handle this diversity.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
---
Changes in V4:
- Add Rob's Reviewed-by tag
Changes in V3:
- Fix yaml indentation issue found by Rob's bot
Changes in V2:
- Use fallback compatibles, along with stm32mp25 specific compatible
- trigger identifier can be up to 4 (e.g. from LPTIM1..5)
---
 .../bindings/mfd/st,stm32-lptimer.yaml        | 40 ++++++++++++++++---
 1 file changed, 34 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/st,stm32-lptimer.yaml b/Documentation/devicetree/bindings/mfd/st,stm32-lptimer.yaml
index d41308856408..4eabafb8079d 100644
--- a/Documentation/devicetree/bindings/mfd/st,stm32-lptimer.yaml
+++ b/Documentation/devicetree/bindings/mfd/st,stm32-lptimer.yaml
@@ -21,7 +21,12 @@ maintainers:
 
 properties:
   compatible:
-    const: st,stm32-lptimer
+    oneOf:
+      - items:
+          - const: st,stm32mp25-lptimer
+          - const: st,stm32-lptimer
+      - items:
+          - const: st,stm32-lptimer
 
   reg:
     maxItems: 1
@@ -48,13 +53,21 @@ properties:
     minItems: 1
     maxItems: 2
 
+  power-domains:
+    maxItems: 1
+
   pwm:
     type: object
     additionalProperties: false
 
     properties:
       compatible:
-        const: st,stm32-pwm-lp
+        oneOf:
+          - items:
+              - const: st,stm32mp25-pwm-lp
+              - const: st,stm32-pwm-lp
+          - items:
+              - const: st,stm32-pwm-lp
 
       "#pwm-cells":
         const: 3
@@ -69,7 +82,12 @@ properties:
 
     properties:
       compatible:
-        const: st,stm32-lptimer-counter
+        oneOf:
+          - items:
+              - const: st,stm32mp25-lptimer-counter
+              - const: st,stm32-lptimer-counter
+          - items:
+              - const: st,stm32-lptimer-counter
 
     required:
       - compatible
@@ -80,7 +98,12 @@ properties:
 
     properties:
       compatible:
-        const: st,stm32-lptimer-timer
+        oneOf:
+          - items:
+              - const: st,stm32mp25-lptimer-timer
+              - const: st,stm32-lptimer-timer
+          - items:
+              - const: st,stm32-lptimer-timer
 
     required:
       - compatible
@@ -92,13 +115,18 @@ patternProperties:
 
     properties:
       compatible:
-        const: st,stm32-lptimer-trigger
+        oneOf:
+          - items:
+              - const: st,stm32mp25-lptimer-trigger
+              - const: st,stm32-lptimer-trigger
+          - items:
+              - const: st,stm32-lptimer-trigger
 
       reg:
         description: Identify trigger hardware block.
         items:
           minimum: 0
-          maximum: 2
+          maximum: 4
 
     required:
       - compatible
-- 
2.25.1