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 15C5F80B; Sat, 4 May 2024 02:34:37 +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=1714790078; cv=none; b=XkoLt+SZDvYtF/SiOQTeGs7kgsur6zDvqsYXufy8PjLiMogHT5AVzSNMfQ3GXBhcnoLZcCMu4eLY4nCn9aUy1TJR0zsO8EyOfs4wiLtfJMSYJOBg3GFQ1fG1sIO2k8KKMYfYStjuNUU589uc4WCb+wb5dEEnO1WEovKWrauit6k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714790078; c=relaxed/simple; bh=yVXtEN60WPDs64dv0Sh0OrP9dwoVq7s070uOhEnMXTI=; h=Message-ID:Content-Type:MIME-Version:In-Reply-To:References: Subject:From:Cc:To:Date; b=EBWN5d5Gjq7FJu7VCtGjmskKj5SHSPJAHo2JMkzfSVgQkMCwX6hzAikQG2qP1nK/s6ITafa6CoFXYCnSXm192sL3/7PIxSq4WoiJj5ZP+y4NeUtfA5PGtcKHp9OM6E+HtbqInmfuqAriSETTb+7Wd78wv0/P2gY8jOFJIoelv1w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CSuvkY0S; 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="CSuvkY0S" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 729ECC116B1; Sat, 4 May 2024 02:34:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714790077; bh=yVXtEN60WPDs64dv0Sh0OrP9dwoVq7s070uOhEnMXTI=; h=In-Reply-To:References:Subject:From:Cc:To:Date:From; b=CSuvkY0STqC1kOsfeQtFTBRAqnzH39UXnwMdiVfjFg8MPe6tAXdsHGdLC2aw9L9Yr Lbi7jZ7BC+ZdIHdpTCM0butQqpvIVTJbtokAAXtOgUEnazbsMf/bJ481YB+eK0kc+u Q+PN9K2u2word9wovED4Vu8bfqYigtkn3r5j9TGxjCQKMqsyVZgX69jgwOmdctC0/F qn61F6ElPnVIyIGMzdFtVMOjPjZLHsByndJl4apRR791VCDfgovWNycWnWhEPM2tyl gCu+RtFaqmV23gPo3N5PPEBTt7s+7cWoGGRZ7iAl1/Sk0Rs3O9YTHwZ+aTh0jfpo5h z6IsnyR27zhdA== Message-ID: <8dcdb1422cd144128c1dc6fff1c273d3.sboyd@kernel.org> Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable In-Reply-To: <20240503-mbly-olb-v2-0-95ce5a1e18fe@bootlin.com> References: <20240503-mbly-olb-v2-0-95ce5a1e18fe@bootlin.com> Subject: Re: [PATCH v2 00/11] Add Mobileye EyeQ system controller support (clk, reset, pinctrl) From: Stephen Boyd Cc: linux-mips@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org, Vladimir Kondratiev , Gregory CLEMENT , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o?= Lebrun To: Conor Dooley , Greg Kroah-Hartman , Krzysztof Kozlowski , Lee Jones , Linus Walleij , Michael Turquette , Philipp Zabel , Rafael J. Wysocki , Rob Herring , Thomas Bogendoerfer , =?utf-8?q?Th=C3=A9o?= Lebrun Date: Fri, 03 May 2024 19:34:35 -0700 User-Agent: alot/0.10 Quoting Th=C3=A9o Lebrun (2024-05-03 07:20:45) > Hello, >=20 > This builds on previous EyeQ5 system-controller revisions[0], supporting > EyeQ5, EyeQ6L and EyeQ6H. We expose a few OLB system-controller > features here: > - Clocks: some read-only PLLs derived from main crystal and some > divider clocks based on PLLs. > - Resets. > - Pin controller, only on EyeQ5 (rest will use generic pinctrl-single). >=20 > EyeQ6H is special in that it has seven instances of this > system-controller. Those are spread around and cannot be seen as a > single device, hence are exposed as seven DT nodes and seven > compatibles. >=20 > This revision differs from previous in that it exposes all devices as a > single DT node. Driver-wise, a MFD registers multiple cells for each > device. Each driver is still in isolation from one another, each in > their respective subsystem. Why can't you use auxiliary device and driver APIs?