[PATCH 1/2] spi: dt-bindings: qcom,spi-geni-qcom: Add property to force GSI mode

[Pengyu Luo <mitltlatltl@gmail.com>]

Some devices (such as gaokun3) do not disable FIFO mode, causing the
driver to fallback to FIFO mode by default. However, these platforms
also support GSI mode, which is highly preferred for certain
peripherals like SPI touchscreens to improve performance.

Introduce the "qcom,force-gsi-mode" device property to hint and force
the controller into GSI mode during initialization.

Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
---
 .../devicetree/bindings/spi/qcom,spi-geni-qcom.yaml          | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml b/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml
index edf399681d7a..80e394c1c715 100644
--- a/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml
+++ b/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml
@@ -45,6 +45,11 @@ properties:
       - const: tx
       - const: rx
 
+  qcom,force-gsi-mode:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      Use DMA (GSI) mode, even if FIFO mode is not disabled.
+
   interconnects:
     minItems: 2
     maxItems: 3
-- 
2.54.0