From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 76AB23AF66E for ; Fri, 18 Sep 2026 12:36:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789734976; cv=none; b=o26xhToTcO6WL3g5So/XdVsVizCXO/81Vq4vTprkgWqsq43MDMDD2jczGMk0wr+DRYM3Ye9cRc6AoD/g2e2ixE/TxBzevMS6+eQf+qH0pUM4QLpnkFWfCjvto+3PxL1LA9bFBLcIRrLhmu4OC4fO/+q0lelno02/1wIPRu9uzIk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789734976; c=relaxed/simple; bh=+Eawl5SxhbcxVTSrftCHbfh/NkYEt/ITCxfJ9a2Njh8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jRToxQfl98B96TX7LOpP4rBm+vghi+9xtfJF6bpUoo3N0ihcptx8FnyrOSc2lGse5q9UrjHVqPoqokR02jqtrAR/6+iG1vRlnPtmO6n5ho3RQCJ4L6EUnOhJ+A6bBdnbYFeEKLOBmJsRrrLoGeTb5uqhQrtUyO4lkzJZyCFtRoo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DusgQpZI; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DusgQpZI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB3BE1F000FF; Fri, 18 Sep 2026 12:36:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789734975; bh=Sb0LbV+qy9vs/5l3oux6Y+ZcGfz04wYswEvpakDWmsQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=DusgQpZIz+qRZGZwEVV53iGNlr2yK/sOSUe0cB2fsd7J9GdoSOk7mCia8ThcOcPv4 bbKOZ+6BWxMdK9/kE0dCsg209TdjdYdqVnZI/Xelg1otJ0pyCcX5WC2yu/xOkoUUr7 o76NSp67xccdL/EPthaMlnLfQy7GM37CAXbafu2R049u3uv1gZqntmD05iWd/SnR/X GvaKrvnQnHy/UFIGnDpuOHD8JxZvgPSkBpRYH72baMCO6ovs6Nv7sUo3KutAf6n6jt 9LZD8yBCocHpioQ/lB5//v8tyiuiuIVx3TDzbtsNiD1S9F7mn65v/+JQfVulB6F5+b ckamN3mQvaW+w== Date: Fri, 18 Sep 2026 14:36:12 +0200 From: Thierry Reding To: Jon Hunter Cc: linux-tegra@vger.kernel.org Subject: Re: [PATCH] arm64: tegra: Enable built-in RTC on Jetson AGX Thor Message-ID: References: <20260817143205.287870-1-thierry.reding@kernel.org> <75f49105-f36a-48cb-877b-5ab96c8fcd90@nvidia.com> <353be5ea-4845-42dd-a902-430f0ed37348@nvidia.com> Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="isrtrbl7wjbvke3j" Content-Disposition: inline In-Reply-To: <353be5ea-4845-42dd-a902-430f0ed37348@nvidia.com> --isrtrbl7wjbvke3j Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH] arm64: tegra: Enable built-in RTC on Jetson AGX Thor MIME-Version: 1.0 On Fri, Sep 11, 2026 at 03:48:19PM +0100, Jon Hunter wrote: >=20 > On 18/08/2026 11:54, Thierry Reding wrote: > > On Mon, Aug 17, 2026 at 03:41:31PM +0100, Jon Hunter wrote: > > >=20 > > > On 17/08/2026 15:32, Thierry Reding wrote: > > > > From: Thierry Reding > > > >=20 > > > > The built-in RTC is mostly useful for testing suspend/resume cycles. > > > >=20 > > > > Signed-off-by: Thierry Reding > > > > --- > > > > arch/arm64/boot/dts/nvidia/tegra264-p4071-0000+p3834.dtsi | 6 ++= ++++ > > > > 1 file changed, 6 insertions(+) > > > >=20 > > > > diff --git a/arch/arm64/boot/dts/nvidia/tegra264-p4071-0000+p3834.d= tsi b/arch/arm64/boot/dts/nvidia/tegra264-p4071-0000+p3834.dtsi > > > > index c4ba3322ed9a..113ecf297378 100644 > > > > --- a/arch/arm64/boot/dts/nvidia/tegra264-p4071-0000+p3834.dtsi > > > > +++ b/arch/arm64/boot/dts/nvidia/tegra264-p4071-0000+p3834.dtsi > > > > @@ -13,6 +13,12 @@ chosen { > > > > stdout-path =3D "serial0:115200n8"; > > > > }; > > > > + bus@0 { > > > > + rtc@c2c0000 { > > > > + status =3D "okay"; > > > > + }; > > > > + }; > > > > + > > >=20 > > >=20 > > > Any reason we should not just enable in tegra264.dtsi by default? I s= ee that > > > we do that for tegra234. > >=20 > > This is more of a development type of option and not everybody may want > > to have it enabled, especially since it's not always hooked up to do > > anything useful. We commonly use it on the devkit for suspend/resume > > testing, so it's useful there, but even then there's usually another RTC > > on a PMIC or something that's considered the primary one. > >=20 > > So in production I suspect people may not want to enable the built-in > > RTC. If we enabled it by default, then people would have to explicitly > > disable it again. > >=20 > > I don't feel very strongly either way, and I could easily be swayed. >=20 > I would be good to get this added. I don't have strong feelings either > way. So ... >=20 > Tested-by: Jon Hunter > Acked-by: Jon Hunter Applied, thanks. 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