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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ab77365ff55sm84490166b.181.2025.02.06.03.30.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 06 Feb 2025 03:30:53 -0800 (PST) Message-ID: <74527323-31ff-4ed0-b19f-e535f26abf2b@oss.qualcomm.com> Date: Thu, 6 Feb 2025 12:30:50 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@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: chrome: Add binding for ChromeOS Pogo pin connector To: Stephen Boyd , Konrad Dybcio , Bjorn Andersson Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, patches@lists.linux.dev, cros-qcom-dts-watchers@chromium.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Benson Leung , devicetree@vger.kernel.org, chrome-platform@lists.linux.dev, Pin-yen Lin References: <20250205233016.1600517-1-swboyd@chromium.org> <20250205233016.1600517-2-swboyd@chromium.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20250205233016.1600517-2-swboyd@chromium.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: uSCLuot14HK-CycC5UVUjAXL8JTfzyJg X-Proofpoint-ORIG-GUID: uSCLuot14HK-CycC5UVUjAXL8JTfzyJg 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=2025-02-06_03,2025-02-05_03,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 suspectscore=0 adultscore=0 mlxlogscore=999 phishscore=0 mlxscore=0 priorityscore=1501 malwarescore=0 spamscore=0 bulkscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2501170000 definitions=main-2502060095 On 6.02.2025 12:30 AM, Stephen Boyd wrote: > Describe the set of pins used to connect the detachable keyboard on > detachable ChromeOS devices. The set of pins is called the "pogo pins". > It's basically USB 2.0 with an extra pin for base detection. We expect > to find a keyboard on the other side of this connector with a specific > vid/pid, so describe that as a child device at the port of the usb > device connected upstream. > > Cc: Rob Herring > Cc: Krzysztof Kozlowski > Cc: Conor Dooley > Cc: Benson Leung > Cc: > Cc: > Cc: Pin-yen Lin > Signed-off-by: Stephen Boyd > --- > .../chrome/google,pogo-pin-connector.yaml | 68 +++++++++++++++++++ > 1 file changed, 68 insertions(+) > create mode 100644 Documentation/devicetree/bindings/chrome/google,pogo-pin-connector.yaml > > diff --git a/Documentation/devicetree/bindings/chrome/google,pogo-pin-connector.yaml b/Documentation/devicetree/bindings/chrome/google,pogo-pin-connector.yaml > new file mode 100644 > index 000000000000..622e171b6b08 > --- /dev/null > +++ b/Documentation/devicetree/bindings/chrome/google,pogo-pin-connector.yaml > @@ -0,0 +1,68 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/chrome/google,pogo-pin-connector.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Google Pogo Pin Connector This looks like a very generic piece of hw.. many boards (esp. convertibles) do the same thing, with 4 or 5 pins on the bottom of the device. But of course hw manufacturers being hw manufacturers, many different kinds of signals go through such connectors - if it's not USB then it's perhaps I2C or some variation thereof IMO, we could perhaps add this to usb-connector.yaml as "usb-custom-connector" or so Konrad