From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm2-f13.google.com (mail-wm2-f13.google.com [74.125.225.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1BD185FDA7 for ; Fri, 18 Sep 2026 19:33:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.225.141 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789759998; cv=none; b=S1CTAbyjram5uMU43KbZ4URYxCoCHjX+t0Ss7DyFb2UMk2oZUMu7M1qTcirWGxTmT/oBP0yg88Z0lraj3SLlAfDXoFIeUXac9lJm0k4/3UszG7e6xIjSZ77Gj2JWvgD4WqngPFuCApUxZUd7r2RIZdKGfyfqpNjx22wdluLPLmA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789759998; c=relaxed/simple; bh=I4ZLHNc3Kb6nHjggVLCsPXuCipOM3fLsDlbTkgctH74=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=uTuLUQL+vUH9P844+SntJiinCnGLTl9YwcfYTNF8Zu5owXkp94DBEJIGndnEje38IyK9Lhfn0nEIwvmTPvPeP6ic1O+Vh1VFZnuAKHM0vZonGLVToonm4ZzOTuz27XnEKcgDsTE758gT6AiXSQLoCae2fl06kf4CsZrRoCu53L8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=rUWOxqYZ; arc=none smtp.client-ip=74.125.225.141 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="rUWOxqYZ" Received: by mail-wm2-f13.google.com with SMTP id 5b1f17b1804b1-49b912d37b5so7077065e9.2 for ; Fri, 18 Sep 2026 12:33:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1789759991; x=1790364791; darn=vger.kernel.org; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to :content-type; bh=sSqwyN7Lx41J/1XR2bBQKHR+k8k6/S/N9gfyTr24T5o=; b=rUWOxqYZi6zM76uApjyrqapuQWHEyB1ROiV1zPbCO+8gEMPIYOape06QcmWP9X56F3 uX9Xly+41EVnOUOUGpdmATNUPK+q6WqPzP887bAIgIRu++YSuuFjMTRzlNkIu/l7BlJC f/Lascl0qC7uW1MVRq0a/ABm1Np4lNVrOuc19gJQq9GuKRsAtsFubHrvJEiPpTNo4jQ8 06wXluB+bORhdMRBHedArs02OKa2lfSoH1mh2L5fBs5K3SkLwcd3b+eoPAPgml8eL600 m32CaCllX7zwy1mFFWrNI3iOAWswtziaIstvRhvfJhEdtqtJNuzaFdt+Noglsxh+6N9w YNUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789759991; x=1790364791; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=sSqwyN7Lx41J/1XR2bBQKHR+k8k6/S/N9gfyTr24T5o=; b=qlYFq7fqDiDDzCu4V3TBfMVMWzu2W92VxSzxHRWG1WtXR9RG0MRm7P+hVzOSQtRBRN oux7fJUVXLp0OETYxqzGFeunCdjrV0iIpLISgrGK30TmKXprTH2fQNwbVOV2lX1CDdPx AaPIcovoSyKYpYnE8jXSl8eFWA/9zQML7UKVwyiHNl32sxDQapAR9G1Ns3S9fisvhRNN Jr8ANS1D9sTbSrZZuLUuOj2TYZpTJgRkeQO3P1u/BvVoaqEfes7QnYvP4yv4FoSU69Hf V01bNSpCihIEIp/NR1XFZTdy+YAmKwCxP6rpTxRkFTVMW76sz8gEq3bAoVzGS+SigPpW xyGg== X-Forwarded-Encrypted: i=1; AKwUvBwwp0G7DDXCkbpYqlAgbB1JohBKqlxHILDns5PvfsQivZFKKufITYR+4YJsR+5Bi+v19z96m9PK4GGf@vger.kernel.org X-Gm-Message-State: AFuF++nwuGxndfihI6rGlH1RpcHzlvz3sZUrLq7LrRJKEAY0w+Z2EjaO acGnC6LHptEgPN3LhNJYYSnrWPf9ljPQwxhrZA2eJIzv6XRqb+0xOEh0 X-Gm-Gg: AYBFou1Inolj2b7YUK0BrdAujawmWGvMY4JtRCLUuIVnMnoVI0Cj5SDmhBjKqGqOlCm P3T3vo6o6+SufY7xm3SJrw8dV33HbWLuCmlIHcOL7vJAw+8AqIVBu1FyL9krwgp3NY3MVGbT0RR KNP7Roibfs86isahgNKeogJGkIc+DdC+RccKO3h9V0csqQQ1vKscISjkqrQFawfD1AaG89JkUEg neJnzOTmOGxrCf3dXEqtPutMZbg3gIHhsp4rQKdg+NP/Ab+lV9foCN0Nj9UnODsnbuVHU7fBQHp W7k1EMrEMaKVMjSyX4LDNwUmJcgzs20/miLssQ85+vx4Hm+Y/w8YXW5I66olDQYg/pU0czr6/5o kEqVDVGBuTImfCT/LZc/Fs4lfgHxzSX/3xRRGlwgJSjYD6HceHz5X8naZX13NtZdbHYLLKUDiBV cW4+9Hhl8aRegbCJ8CO8h+fGsqz5Lri8VEbhrHijyN9IebAIGL3VEVdlGxIfkqNMh1moNx+XrB7 UQoVPSTjGvcQlzlsF7JLxUO1bC6egAjRRNUZmvfO4w= X-Received: by 2002:a05:600c:1986:b0:49b:9105:cdaf with SMTP id 5b1f17b1804b1-49fc56cb2f7mr87032645e9.8.1789759990865; Fri, 18 Sep 2026 12:33:10 -0700 (PDT) Received: from [192.168.0.40] (212.71.14.70.adsl.dyn.edpnet.net. [212.71.14.70]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49fcd2f7ef3sm10168685e9.0.2026.09.18.12.33.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 18 Sep 2026 12:33:10 -0700 (PDT) Message-ID: <74d59f1e-479a-495e-8413-51e1feca78f5@gmail.com> Date: Fri, 18 Sep 2026 21:33:10 +0200 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 v3 1/2] dt-bindings: rtc: Add property for Raspberry Pi 5 RTC To: Stefan Wahren , Krzysztof Kozlowski Cc: Alexandre Belloni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Jonathan Bell , linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org References: <20260917135841.841680-1-sander.speetjens@gmail.com> <20260917135841.841680-2-sander.speetjens@gmail.com> <20260918-steadfast-unselfish-loris-996d7d@quoll> Content-Language: en-US From: Sander Speetjens In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit > On 9/18/26 15:27, Stefan Wahren wrote: >> Am 18.09.26 um 13:44 schrieb Krzysztof Kozlowski: >>> On Thu, Sep 17, 2026 at 03:58:40PM +0200, Sander Speetjens wrote: >>>> Add trickle-voltage-millivolt property for the Raspberry Pi 5 RTC. >>> Why? Describe the hardware, the need, not the diff. >> Is this something we can avoid by making this configurable via >> userspace / hw_clock --param-set=parameter=value ? I think it would be handy to have both. A cm5 board designer could choose to have a super-cap or lithium ion cell and for that a device-tree property would be handy for it is always the same. But for a user attachable battery on the pi 5b via headers or soldering the userspace version would be easier.