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 A665338423B for ; Wed, 2 Sep 2026 15:48:36 +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=1788364118; cv=none; b=l1G0nKLqG8JY/JmQOmHozBOhwYdna8AMqmZlXxI3N71Fi7dZ5GSS1QT8FKoW9XG/Df1IXCzfIuu+SbxJOCqN/V6qN956u/C4VSlceopMIBajYp3AryZQ9wvdK+CLuqMJMNb9yftLBOVRrryRZxiAczjRtGb6KAnoqh9UUeAOxfQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788364118; c=relaxed/simple; bh=FK5r2VJ7dTfRTiRnjWhz/gfkP8J5XQFW/3hUXfbZKxs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ls+oTGhJnbRiYdCWlI1RK2elS2GMO1H90CQ67/AlXaUsHpa9VJzhKsB0PYmqrkDl9w2HJWVecVdu0nl8ATAcJ8L3mLJMZE9fCsxklGdfIwd0fIDYmLspmnnJAqa5Y4/e+k64cm8Wbcdqcx/LQ8FF3k0DUcoCbTxk8V8LpUfXJEs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=K+sfTU/b; 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="K+sfTU/b" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 041761F00A3A; Wed, 2 Sep 2026 15:48:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788364116; bh=iCMCHiLmbVMniSbQUlMNA+V3bAjUJklD1qAmp+/qYlI=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=K+sfTU/bdKV7tbSxo9A8Qvb/hrMUfXLZ+p0Lqxgw1AbeT8wx3l34D4kGf0ZXFYESO VzpPMjBzALVfXkit8eFsIYbsdPO13d6AGvIRJJf0haScGzLti7Jyrt5G+Gva2Dq0eG /2Qa4Z/XEn7/vAy1/4Li36EICXXMvuyXiF/kerFMhCC28sy80FAMXeXhjZ/RKsM0pw il8wUeUnz8dINDbUTR7wMrJsst4tm1QX6sFk2gCdfdeWodYUFxdD+8o9yDIZk0Fwf+ 1SFWycQC02OX22QY8cB2VniYSHER+wL1sSD+n2CPrJGgPIhzXIz7WgdfnqImO4yA9f vbeXGhIk13+zA== Received: by traversing.sirena.org.uk (Postfix, from userid 1000) id 6652FCEEA72; Wed, 02 Sep 2026 16:48:33 +0100 (BST) Date: Wed, 2 Sep 2026 16:48:33 +0100 From: Mark Brown To: Shashank Maurya Cc: Liam Girdwood , linux-kernel@vger.kernel.org, venkata.valluru@oss.qualcomm.com, Jessica Zhang Subject: Re: [PATCH] regulator: rpi-panel-v2: Add optional vcc-supply support Message-ID: References: <20260828-rpi_reg-v1-1-1066b1f68630@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@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="ZrSFiA8PmtPM4ic7" Content-Disposition: inline In-Reply-To: X-Cookie: Orders subject to approval. --ZrSFiA8PmtPM4ic7 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Aug 31, 2026 at 11:44:08AM +0530, Shashank Maurya wrote: > On Fri, Aug 28, 2026 at 01:13:42PM +0100, Mark Brown wrote: > > On Fri, Aug 28, 2026 at 09:59:43AM +0530, Shashank Maurya wrote: > > > The Raspberry Pi Panel V2 regulator driver may rely on an external > > > power rail being provided through the device tree. Add support for an > > > optional "vcc" regulator and enable it during probe before accessing > > > the panel controller. > > Does the device work without power? A name like "Vcc" makes it sound > > like this is the main supply for the device... > No without VCC, regulator will not be up. So device will not work if > power rail is software controlled and not always high. That doesn't sound very optional then. --ZrSFiA8PmtPM4ic7 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmqYRU0ACgkQJNaLcl1U h9Dk4gf+O83b89s65r3rZ0a4tSXFuaFkUUauruKyMqczrJBsezye262PF4urkn/W bPmKXZ8H2GOkY1NEFas7vkX+IesJNLvcs8coEDifJ6jHxP9oVEXzkSchzT7aQCJi 0wNx5o26ilHGMsrsBx8YwXOwZKJeSGbuSMvTvKkNfDvQ7ZGsxr2xEyt/e4oJyvBC g/u7VWqgoO87Pg/jZ9iuYk+eRa7G98l+77Yvrf5u9B8RLcJH6Wp/t4ym0aREgaLj u5g28RuS73khOjL7ilRCL12U1IqxGMjvU2Fj/2SCReXEWlYBYP7QmB8IOSxuMk07 y1ISV6EkarE/g7/cE7cP6SFHGggSGQ== =4lJK -----END PGP SIGNATURE----- --ZrSFiA8PmtPM4ic7--