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

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Message-Id: <20241204150326.1470749-3-quic_vdadhani@quicinc.com>
Date: Wed,  4 Dec 2024 20:33:21 +0530
From: Viken Dadhaniya <quic_vdadhani@...cinc.com>
To: andi.shyti@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, gregkh@...uxfoundation.org, jirislaby@...nel.org,
        broonie@...nel.or, andersson@...nel.org, konradybcio@...nel.org,
        johan+linaro@...nel.org, dianders@...omium.org, agross@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-spi@...r.kernel.org
Cc: =quic_msavaliy@...cinc.com, quic_anupkulk@...cinc.com,
        Viken Dadhaniya <quic_vdadhani@...cinc.com>,
        Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
Subject: [PATCH v1 2/7] spi: dt-bindings: Document DT properties for QUP firmware loading

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@...cinc.com>
Signed-off-by: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
Signed-off-by: Viken Dadhaniya <quic_vdadhani@...cinc.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