From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5CFD1D3ABF4 for ; Mon, 11 Nov 2024 23:46:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ABW+11sQ1l4nBs8Olbs/aP1MX6sdIare85wg7ZRgab4=; b=XaV0yDmNpBNjNWYOA3NzdNTDFS 1mDhmNXwwY0H3G+UPupAp/Z4gmGPoyYfgMVnfj35203Wc7bJ1BXe/lSZsY11kQXO2Cn/empqslHTE itMpTJLFOcKmn1D/9Mm+bwodx7KVM/8fiO4UF+eYw6gKsO9jSwbyKUcdsz9lsVKcoVEsqWFFJ3+Re ZRCwJU1xgQVzm4fTzOd00tD6ZRao4lDOnlyOvVYZvcfeYlWcgaYT+VYfU1fFeCLN94IH6dAb4C4yD KAfRV8RHAwwa5dkof+j/Kt51BqAgn0iPdU+uIVbdo0s9tO2N28IWk9P3Bog93p1giJogB67fwpZU5 adU5WZsw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tAe6T-00000001ePr-04QI; Mon, 11 Nov 2024 23:45:53 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tAbt2-00000001Mic-2rUG for linux-arm-kernel@lists.infradead.org; Mon, 11 Nov 2024 21:23:54 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 8CDE15C5863; Mon, 11 Nov 2024 21:23:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A315C4CECF; Mon, 11 Nov 2024 21:23:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1731360231; bh=NaCDGDciMwXtP8AUG1ZAj+h2gJO6t1bPaGcNDVapqAk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=UGeajZqhjZasGKQm4q6r+WxsrNe2qCdR8p7pVfXpD/oW1Xy/qHoKXKF2ZVi7IlQEu bQznd75PmHJeMy1KncMfKpBjPnUWuIW6E7HgY45LfIiGB6Kv5JD76iOhJyovUAejMq NkgaEhkc6Y30Ax1HTcS1Zt5p1ubGbiory1TIjkjuqg8fW3AQ0HAlAEENZGfxpL9++c qilmeCsNN/1EveDny5370zOPFT0Ke5NnLmoAA4XLloX4IaWqbkpJ61W7Kn3qUmE/q3 GNHKQV2ePkM5uhHrXDa4sgdWjj4Ifd3bWb1Bboe1IrcIBHPhIFKu+a0JGWnFNtNIZc RV4xF8d6+swXQ== Date: Mon, 11 Nov 2024 15:23:49 -0600 From: Rob Herring To: Matthias Schiffer Cc: Conor Dooley , Nishanth Menon , Vignesh Raghavendra , Tero Kristo , Krzysztof Kozlowski , Conor Dooley , Greg Kroah-Hartman , Kees Cook , Tony Luck , "Guilherme G. Piccoli" , Felipe Balbi , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-hardening@vger.kernel.org, Devarsh Thakkar , Hari Nagalla , linux@ew.tq-group.com Subject: Re: [PATCH 2/5] dt-bindings: arm: ti: Add compatible for AM625-based TQMa62xx SOM family and carrier board Message-ID: <20241111212349.GA1955710-robh@kernel.org> References: <4f5ad877f44df35a3b2c7f336647f057c4e6377d.1730299760.git.matthias.schiffer@ew.tq-group.com> <20241104-floral-dexterous-7d3fee2ff616@spud> <20241105-tinsmith-countable-fbb51045bc98@spud> <7286141141fe4930cd2581dac7a1fb36a98e62c4.camel@ew.tq-group.com> <20241106-happy-anything-46f7293f6aca@spud> <068c22af19c07a7c79bb4abb0366a2505b4b1aae.camel@ew.tq-group.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <068c22af19c07a7c79bb4abb0366a2505b4b1aae.camel@ew.tq-group.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241111_132352_830226_0EF6B9B7 X-CRM114-Status: GOOD ( 19.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Nov 11, 2024 at 10:58:57AM +0100, Matthias Schiffer wrote: > On Wed, 2024-11-06 at 16:40 +0000, Conor Dooley wrote: > > On Wed, Nov 06, 2024 at 01:03:08PM +0100, Matthias Schiffer wrote: > > > On Tue, 2024-11-05 at 18:55 +0000, Conor Dooley wrote: > > > > On Tue, Nov 05, 2024 at 11:40:20AM +0100, Matthias Schiffer wrote: > > > > > On Mon, 2024-11-04 at 18:47 +0000, Conor Dooley wrote: > > > > > > On Mon, Nov 04, 2024 at 10:47:25AM +0100, Matthias Schiffer wrote: > > > > > > > The TQMa62xx is a SoM family with a pluggable connector. The MBa62xx is > > > > > > > the matching reference/starterkit carrier board. > > > > > > > > > > > > Why all the wildcards? Why isn't there a compatible per device in the > > > > > > family? > > > > > > Because all variants use the same Device Tree. There is also only one compatible and one (main) DTSI > > > for the AM62 SoC family, which our Device Trees are based on. > > > > So what varies between the members of the family? > > There are currently 6 SoCs in the family: > - AM6254 > - AM6252 > - AM6251 > - AM6234 > - AM6232 > - AM6231 > > They differ in: > - Existence of GPU (AM625 vs AM623) > - Number of Cortex-A53 cores (last digit) > > All of these use ti,am625 as their SoC-level compatible. The differences are currently handled by U- > Boot, which checks various feature flags in the SoC registers and patches the OS DTB accordingly by > removing CPU nodes and disabling the GPU node if necessary. That's how it should be. Most likely, those are all the same die. Different die are expensive and it takes a high volume to justify the cost. Rob