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 7DE4B34FF4E; Wed, 29 Oct 2025 17:33:52 +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=1761759232; cv=none; b=jw5MDLdeqEB0ykjjNar4q8WpbI/vfxuqMx0eYNst/nkTjg91ZOBzoZv2/tAql64+dNBbCJzfH/+CZrrknbEcTg5f1c+yxEAV/8DMjDdxB9fvBKuYDfTe91XwKwXQc0j120Wb7KnlLmfMhkEeXmKOTDdbrgNl8eObVxafRRf9fm4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761759232; c=relaxed/simple; bh=655Qm1zghE7kR+ommrUMLIsCzPbYJTWpOLztSRFlFN8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=lXBMXHZvw3zoVQca0N+xhGM2PIG3rQwN1Usj4nXIOqzI9pJWtDpYNRa1ttN4+MT0HBK3q3UppXRpjybW5gYdaqTINbo/1ZoLEgJqrTxIIGQ9scpHVsAoA6ItVZe9KbqbkyQQKjgEE5BlEiAveS5tBUASNJxG9S7WM6/sqhVgb/A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QKJO92+c; 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="QKJO92+c" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 814A9C4CEF8; Wed, 29 Oct 2025 17:33:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761759232; bh=655Qm1zghE7kR+ommrUMLIsCzPbYJTWpOLztSRFlFN8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=QKJO92+cq1qPa3UJvnYzoK7NbmS0XK2eVnSUE5RtP2bllNcEGnkOjBVnXTgqECnTI Gxfzb5P9REVV8qsE3vkPD/m61uX8C4+JXnzcyTvOrtGHisB5sye64Y/WhyNfJFgLaz lz/RdZS3UR6S6lihCkzcbZhstijznfrIbLCmN3Cvx2QSwWHBM2QVAGyx5m99xfcg3a ea89CBq19BSkoxP3yotmAkANcOQe/FvfNHKBN+H1QjDSGiB/MB11Wd/kXGCl59dk40 9jStJg6QcV1JLKUFWr19R5EutJeSYSh7s4MxGDGaXEXigHJItYjMUHaxoobrcYfCWp TvY4yFQKoD8+A== Date: Wed, 29 Oct 2025 17:33:48 +0000 From: Conor Dooley To: Dan Carpenter Cc: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] dt-bindings: mfd: syscon: introduce no-auto-mmio property for syscons Message-ID: <20251029-ambiance-snooper-43dc00dcee68@spud> References: <230cf12861a4f0b9effc72522444d3e28c1de2c9.1761753288.git.dan.carpenter@linaro.org> Precedence: bulk X-Mailing-List: devicetree@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="ZqvK64s1Y52gkgpz" Content-Disposition: inline In-Reply-To: <230cf12861a4f0b9effc72522444d3e28c1de2c9.1761753288.git.dan.carpenter@linaro.org> --ZqvK64s1Y52gkgpz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Oct 29, 2025 at 08:27:05PM +0300, Dan Carpenter wrote: > Generally, syscons are created automatically and accessed direclty via > MMIO however sometimes syscons might only be accessible from the secure > partition or through SCMI etc. Introduce the no-auto-mmio property to > tell the operating system that the syscon needs to be handled manually. "System controller node represents a register region containing a set of miscellaneous registers." If this isn't actually a register region, but is instead an interface provided by SCMI or whatever "secure partition" is (optee?), why is the syscon compatible being used for the device in the first place? Cheers, Conor. > Signed-off-by: Dan Carpenter > --- > Documentation/devicetree/bindings/mfd/syscon.yaml | 4 ++++ > 1 file changed, 4 insertions(+) >=20 > diff --git a/Documentation/devicetree/bindings/mfd/syscon.yaml b/Document= ation/devicetree/bindings/mfd/syscon.yaml > index 657c38175fba..a0ad12ae0bee 100644 > --- a/Documentation/devicetree/bindings/mfd/syscon.yaml > +++ b/Documentation/devicetree/bindings/mfd/syscon.yaml > @@ -245,6 +245,10 @@ properties: > resets: > maxItems: 1 > =20 > + no-auto-mmio: > + type: boolean > + description: Prevents the syscon from being created automatically > + > required: > - compatible > - reg > --=20 > 2.51.0 >=20 --ZqvK64s1Y52gkgpz Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRh246EGq/8RLhDjO14tDGHoIJi0gUCaQJP/AAKCRB4tDGHoIJi 0hI1AQDFYHdDflBdSUuSVwpprYoijqQftJFl+1trKx0ZwumahAEA2PUMhd44uvdk Aq43laZ2VCzBECPTaog69xYYAPFwtw0= =0Jsq -----END PGP SIGNATURE----- --ZqvK64s1Y52gkgpz--