[PATCH 2/6] dt-bindings: serial: Add clock-frequency property as an alternative to clocks

[Andrea della Porta]

The UARTA controller on BCM2712 connected to Bluetooth chip does not
mandiatorily ask for a clock connected to the high speed baud generator.
This is, in fact, an optional clock in the driver.

As an alternative, the call to uart_read_port_properties() ensures that
just a simple 'clock-frequency' property can be specified for the clock
value.

Amend the bindings to allow to either specify clocks or clock-frequency.

Signed-off-by: Andrea della Porta <andrea.porta at suse.com>
---
 .../bindings/serial/brcm,bcm7271-uart.yaml    | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml b/Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml
index 89c462653e2d..96697b1428bd 100644
--- a/Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml
@@ -40,7 +40,15 @@ properties:
           - const: dma_tx
           - const: dma_intr2
 
+  clock-frequency:
+    description:
+      The input clock frequency for the UART, Either this or clocks must be
+      specified.
+
   clocks:
+    description:
+      High speed baud rate clock. Either this or clock-frequency must be
+      specified.
     minItems: 1
 
   clock-names:
@@ -61,11 +69,18 @@ required:
   - compatible
   - reg
   - reg-names
-  - clocks
-  - clock-names
   - interrupts
   - interrupt-names
 
+oneOf:
+  - allOf:
+      - required:
+          - clocks
+      - required:
+          - clock-names
+  - required:
+      - clock-frequency
+
 unevaluatedProperties: false
 
 examples:
-- 
2.35.3