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Fri, 24 Jan 2025 10:53:21 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTPS id 4485cm9h0c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 24 Jan 2025 10:53:21 +0000 Received: from APBLRPPMTA02.qualcomm.com (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 50OArLRj016285; Fri, 24 Jan 2025 10:53:21 GMT Received: from hu-devc-hyd-u22-c.qualcomm.com ([10.213.97.252]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTPS id 50OArKkF016284 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 24 Jan 2025 10:53:21 +0000 Received: by hu-devc-hyd-u22-c.qualcomm.com (Postfix, from userid 4047106) id 6C2F655C; Fri, 24 Jan 2025 16:23:20 +0530 (+0530) From: Viken Dadhaniya To: andi.shyti@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, gregkh@linuxfoundation.org, jirislaby@kernel.org, broonie@kernel.or, andersson@kernel.org, konradybcio@kernel.org, johan+linaro@kernel.org, dianders@chromium.org, agross@kernel.org, linux-arm-msm@vger.kernel.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-spi@vger.kernel.org Cc: quic_msavaliy@quicinc.com, quic_anupkulk@quicinc.com, Viken Dadhaniya Subject: [PATCH v2 2/8] dt-bindings: i2c: qcom,i2c-geni: Add support for selecting data transfer mode Date: Fri, 24 Jan 2025 16:23:03 +0530 Message-Id: <20250124105309.295769-3-quic_vdadhani@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250124105309.295769-1-quic_vdadhani@quicinc.com> References: <20250124105309.295769-1-quic_vdadhani@quicinc.com> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: Z9hZOKDbuLarUJtzNLSm3tK5N_7xPbvO X-Proofpoint-GUID: Z9hZOKDbuLarUJtzNLSm3tK5N_7xPbvO X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-01-24_04,2025-01-23_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 impostorscore=0 mlxscore=0 suspectscore=0 lowpriorityscore=0 mlxlogscore=999 spamscore=0 phishscore=0 clxscore=1015 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501240079 Data transfer mode is fixed by TrustZone (TZ), which currently restricts developers from modifying the transfer mode from the APPS side. Document the 'qcom,xfer-mode' properties to select the data transfer mode, either GPI DMA (Generic Packet Interface) or non-GPI mode (PIO/CPU DMA). I2C 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 Signed-off-by: Mukesh Kumar Savaliya Signed-off-by: Viken Dadhaniya --- v1 -> v2: - Drop 'qcom,load-firmware' property and add 'firmware-name' property in qup common driver. - Update commit log. v1 Link: https://lore.kernel.org/linux-kernel/20241204150326.1470749-2-quic_vdadhani@quicinc.com/ --- --- .../devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml index 9f66a3bb1f80..68e4bf0c84d1 100644 --- a/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml +++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml @@ -66,6 +66,12 @@ properties: required-opps: maxItems: 1 + qcom,xfer-mode: + description: Set the value to 1 for non-GPI (FIFO/CPU DMA) mode and 3 for GPI DMA mode. + The default mode is FIFO. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [1, 3] + required: - compatible - interrupts @@ -142,5 +148,6 @@ examples: interconnect-names = "qup-core", "qup-config", "qup-memory"; power-domains = <&rpmhpd SC7180_CX>; required-opps = <&rpmhpd_opp_low_svs>; + qcom,xfer-mode = <1>; }; ...