[PATCH v1 2/7] spi: dt-bindings: Document DT properties for QUP firmware loading

Viken Dadhaniya
2024-12-04T15:03:40Z

Document the 'qcom,load-firmware' and 'qcom,xfer-mode' properties to
support SE(Serial Engine) firmware loading from the protocol driver and
to select the data transfer mode, either GPI DMA (Generic Packet Interface)
or non-GPI mode (PIO/CPU DMA).

SPI controller can operate in one of two modes based on the
'qcom,xfer-mode' property, and the firmware is loaded accordingly.

Co-developed-by: Mukesh Kumar Savaliya <quic_msavaliy@quicinc.com>
Signed-off-by: Mukesh Kumar Savaliya <quic_msavaliy@quicinc.com>
Signed-off-by: Viken Dadhaniya <quic_vdadhani@quicinc.com>
---
.../devicetree/bindings/spi/qcom,spi-geni-qcom.yaml | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml b/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml
index 2e20ca313ec1..7038981f54ff 100644
--- a/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml
+++ b/Documentation/devicetree/bindings/spi/qcom,spi-geni-qcom.yaml
@@ -66,6 +66,15 @@ properties:
reg:
maxItems: 1

+ qcom,load-firmware:
+ type: boolean
+ description: Optional property to load SE (serial engine) Firmware from protocol driver.
+
+ qcom,xfer-mode:
+ description: Value 1,2 and 3 represents FIFO, CPU DMA and GSI DMA mode respectively.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [1, 2, 3]
+
required:
- compatible
- clocks
@@ -97,6 +106,8 @@ examples:
interconnects = <&qup_virt MASTER_QUP_CORE_0 0 &qup_virt SLAVE_QUP_CORE_0 0>,
<&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_QUP_0 0>;
interconnect-names = "qup-core", "qup-config";
+ qcom,load-firmware;
+ qcom,xfer-mode = <1>;
};

- |
--
2.34.1