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Wed, 12 Aug 2026 11:21:40 -0700 (PDT) X-Received: by 2002:a17:903:40d1:b0:2c7:ebfb:618f with SMTP id d9443c01a7336-2d34556662bmr88758575ad.14.1786558899929; Wed, 12 Aug 2026 11:21:39 -0700 (PDT) Received: from [192.168.1.15] ([106.222.235.2]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2d37c24a371sm537155ad.28.2026.08.12.11.21.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 12 Aug 2026 11:21:39 -0700 (PDT) Message-ID: Date: Wed, 12 Aug 2026 23:51:34 +0530 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/2] dt-bindings: i2c: Add Qualcomm I2C target controller To: Krzysztof Kozlowski Cc: Mukesh Kumar Savaliya , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260802-i2c-qcom-slave-v2-0-27653118fa75@oss.qualcomm.com> <20260802-i2c-qcom-slave-v2-1-27653118fa75@oss.qualcomm.com> <20260804-airborne-impala-of-proficiency-a9a8d9@quoll> Content-Language: en-US From: Viken Dadhaniya In-Reply-To: <20260804-airborne-impala-of-proficiency-a9a8d9@quoll> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: Q_4Cuwx3oBNkgyGypEnFXa2kvqjRbbLP X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODEyMDE0NyBTYWx0ZWRfX3VfIIzZzJkV+ tpVv2mt4vFT+QuqnjdDs8zhg6SLINQwDJAfQFHZy0G8fwdUWDBVyTPWkZCm2pZomdlMmKbT/9pb Were9oGXuaCvBqkdku8oj4EHgLDLdE3OHOaga0mZOdau6MdY23fR4a5nGwnk6Zq/7Dk/EywwPnu S7XU+K026v4BJxlZY7vFfeXVdcj2ENohRIzP00mIB3y9ZbxmYfrjceTiCkK6xis1udiavXJ2k5n Kr0D2OrZRW3mEO0/UPnAJR5HTVWmXGivnyqBYkgOm/SF+oQXSv7gKt3tsVcJj6K2ZSUyUoRuapF udnR5fzOao1ZSJvqlABd0SgR0Vvswxiz9D+UpSGXnLdQbzIWxjZJYQj9Utv+29hYMo0LiPu3Olr mxC+3Z8IN2Y+1xy5pI6LaVDWrdWdUkqNzzth3Z+MM4831jvnH0twZbVtXlKRMAAJI++aD2OFXvg NylldWUHXHEK0G/5laQ== X-Authority-Analysis: v=2.4 cv=E8n9Y6dl c=1 sm=1 tr=0 ts=6a7cb9b5 cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=NH2SoAXOXKK5768fTBPIkg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=gEfo2CItAAAA:8 a=EUspDBNiAAAA:8 a=RP_QtRrjLn2U0etmI9oA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=GvdueXVYPmCkWapjIL-Q:22 a=sptkURWiP4Gy88Gu7hUp:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwODEyMDE0NyBTYWx0ZWRfX8Ip/dSgninYB x0Ly2PVBlnlgX0PBn2ronYJ7GmWTxCIbRFczdkm12LqX5XwgrI2Xs41yHhnOK6idkrqNtdCJ6PO FNdS3Lg2ZKsVw8AzaRt/IWy6bB6QYGk= X-Proofpoint-ORIG-GUID: Q_4Cuwx3oBNkgyGypEnFXa2kvqjRbbLP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-12_05,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 malwarescore=0 lowpriorityscore=0 adultscore=0 bulkscore=0 clxscore=1015 impostorscore=0 spamscore=0 phishscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608120147 On 8/4/2026 1:14 PM, Krzysztof Kozlowski wrote: > On Sun, Aug 02, 2026 at 06:43:30PM +0530, Viken Dadhaniya wrote: >> QDU1000 and related Qualcomm SoCs include a dedicated I2C target >> controller that operates exclusively in target mode. It is a distinct >> IP from the Qualcomm I2C master controllers (GENI, QUP) with a >> different register interface, so it requires its own binding. >> >> Document the MMIO region, interrupt, XO and AHB clocks, interconnect >> path, and optional pinctrl states for the controller. >> >> Signed-off-by: Viken Dadhaniya >> --- >> .../devicetree/bindings/i2c/qcom,i2c-target.yaml | 84 ++++++++++++++++++++++ > > Filename must match compatible. Sure, will update it. > >> 1 file changed, 84 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-target.yaml b/Documentation/devicetree/bindings/i2c/qcom,i2c-target.yaml >> new file mode 100644 >> index 000000000000..1e34e874cc4c >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-target.yaml >> @@ -0,0 +1,84 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/i2c/qcom,i2c-target.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Qualcomm I2C Target Controller >> + >> +maintainers: >> + - Mukesh Kumar Savaliya >> + - Viken Dadhaniya >> + >> +description: >> + Dedicated hardware IP found on Qualcomm SoCs that operates exclusively >> + as an I2C target (slave) device on the bus. Supports FIFO (PIO) mode >> + for data transfer. >> + >> +properties: >> + compatible: >> + enum: >> + - qcom,qdu1000-i2c-target >> + >> + reg: >> + maxItems: 1 >> + >> + interrupts: >> + maxItems: 1 >> + >> + clocks: >> + items: >> + - description: XO reference clock >> + - description: AHB bus clock >> + >> + clock-names: >> + items: >> + - const: xo >> + - const: ahb >> + >> + interconnects: >> + maxItems: 1 >> + >> + interconnect-names: >> + const: i2c > > Pretty useless name, drop the interconnect-names. Sure. will remove it. > >> + >> + pinctrl-0: true >> + pinctrl-1: true >> + >> + pinctrl-names: >> + items: >> + - const: default >> + - const: sleep >> + >> +required: >> + - compatible >> + - reg >> + - interrupts >> + - clocks >> + - clock-names >> + - interconnects >> + - interconnect-names >> + >> +allOf: >> + - $ref: /schemas/i2c/i2c-controller.yaml# > > This wasn't here before. Is this a controller or a target? Now I am > confused. It is a target. Wrong ref, will remove it. > >> + >> +unevaluatedProperties: false >> + >> +examples: >> + - | >> + #include >> + #include >> + #include >> + >> + i2c@88ca000 { >> + compatible = "qcom,qdu1000-i2c-target"; >> + reg = <0x88ca000 0x64>; >> + clocks = <&gcc GCC_SM_BUS_XO_CLK>, <&gcc GCC_SM_BUS_AHB_CLK>; >> + clock-names = "xo", "ahb"; >> + interrupts = ; >> + #address-cells = <1>; >> + #size-cells = <0>; > > How is this valid? > > What sort of children the target has? What does it do with these > children? This controller is an I2C target only — it has no DT children. Will remove those lines. > >> + interconnect-names = "i2c"; >> + interconnects = <&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_SMBUS_CFG 0>; >> + }; >> +... >> >> -- >> 2.34.1 >>