From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8725742065; Tue, 19 Aug 2025 20:17:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755634653; cv=none; b=gzUc39m8CI4KCOPWUKwIhVOz+16ycg1fBchE9acqn9GvNXLX1j77Gq18Ibk3KuIryZFDew3NYOLt6odxrY1NeETZOuwe+BTZSj298OmSbl3UcTpIkxANjrsjrgFrUUVkJG5QCsNQZWXAZGgWvXBGLpFIXLVPDgOmYn4lLS/gthM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755634653; c=relaxed/simple; bh=U3q6ToLedU70bZtEW12+5dJwu9UAwqYJ/UGCU6LWzSQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ke0jy8abry7xMVaZh1JY8pKelD/21zoFBShJYMH7eRCujo0lJHex7qG7WWVmWwlAyB2n33NOvQaHwcugrxj3EBFaVY6MGajI+nqgF/jypI67LKsD8Qp9JrfTHJOsETxsmers6/NZJynCwQl9C2yG6VaXM/JcP+QSL+ZKof0pjjU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LRp7A+/w; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LRp7A+/w" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFE99C4CEF1; Tue, 19 Aug 2025 20:17:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755634652; bh=U3q6ToLedU70bZtEW12+5dJwu9UAwqYJ/UGCU6LWzSQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=LRp7A+/wRv7ggXzPyAsPMR83RBwwR2BGDqN+WXMkAITJvfTJ3lku62QcIAgoib+/N PeylRYfP1DU2pi5hCGbkzN4M101W6GHSVsNWX5MXUIySBw0Yjeeb9PpUE6Q7YRwaXb 5/wgn6b9aBFaYNiqXrQCVqtyI7291RqbqEwKYPMffM0kBSHsvE2enA+VIrTHv5CbzX /sX5xEZHMM9znosbNs6s8uw/AJ0IH3syrY1v9xM2dmCUY3oDplXgtCNn8GOcXhX+gm e+XaOPjPLBiuzPwG84m8tt5beyZxjiN+tJV/j9ZaFXUSD85xIikBHV8iH0sVDLzBSx r5T2UwPckIltw== Date: Tue, 19 Aug 2025 15:17:31 -0500 From: "Rob Herring (Arm)" To: James Calligeros Cc: linux-arm-kernel@lists.infradead.org, asahi@lists.linux.dev, Lee Jones , Alexandre Belloni , Conor Dooley , Mark Kettenis , Janne Grunau , linux-input@vger.kernel.org, Krzysztof Kozlowski , Sven Peter , Dmitry Torokhov , Alyssa Rosenzweig , linux-rtc@vger.kernel.org, Guenter Roeck , linux-kernel@vger.kernel.org, Jean Delvare , linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, Neal Gompa Subject: Re: [PATCH 1/8] dt-bindings: rtc: Add Apple SMC RTC Message-ID: <175563462607.1254097.12905994195694572424.robh@kernel.org> References: <20250819-macsmc-subdevs-v1-0-57df6c3e5f19@gmail.com> <20250819-macsmc-subdevs-v1-1-57df6c3e5f19@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250819-macsmc-subdevs-v1-1-57df6c3e5f19@gmail.com> On Tue, 19 Aug 2025 21:47:53 +1000, James Calligeros wrote: > From: Sven Peter > > Apple Silicon Macs (M1, etc.) have an RTC that is part of the PMU IC, > but most of the PMU functionality is abstracted out by the SMC. > An additional RTC offset stored inside NVMEM is required to compute > the current date/time. > > Reviewed-by: Mark Kettenis > Reviewed-by: Neal Gompa > Signed-off-by: Sven Peter > Signed-off-by: James Calligeros > --- > .../bindings/mfd/apple,smc.yaml | 9 +++++++ > .../bindings/rtc/apple,smc-rtc.yaml | 35 +++++++++++++++++++++++++ > MAINTAINERS | 1 + > 3 files changed, 45 insertions(+) > Reviewed-by: Rob Herring (Arm)