[PATCH v4 01/16] spi: dt-bindings: add spi-max-post-config-frequency property

[Santhosh Kumar K <s-k6@ti.com>]

Add spi-max-post-config-frequency, a generic uint32 property for SPI
peripherals that support two distinct clock rates: a conservative rate
always reachable without controller configuration, and a higher rate
reachable only after controller-side configuration such as PHY tuning.

When both properties are present, spi-max-frequency gives the
conservative pre-configuration rate and spi-max-post-config-frequency
gives the higher post-configuration target.

Signed-off-by: Santhosh Kumar K <s-k6@ti.com>
---
 .../devicetree/bindings/spi/spi-peripheral-props.yaml       | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
index 880a9f624566..ece86f65930f 100644
--- a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml
@@ -45,6 +45,12 @@ properties:
     description:
       Maximum SPI clocking speed of the device in Hz.
 
+  spi-max-post-config-frequency:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Maximum SPI clock frequency in Hz achievable post controller-side
+      configuration.
+
   spi-cs-setup-delay-ns:
     description:
       Delay in nanoseconds to be introduced by the controller after CS is
-- 
2.34.1