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 X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 676DBC04EB8 for ; Thu, 6 Dec 2018 14:37:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 399BA20672 for ; Thu, 6 Dec 2018 14:37:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 399BA20672 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729678AbeLFOhD (ORCPT ); Thu, 6 Dec 2018 09:37:03 -0500 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:51902 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728482AbeLFOhC (ORCPT ); Thu, 6 Dec 2018 09:37:02 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3ACBFA78; Thu, 6 Dec 2018 06:37:02 -0800 (PST) Received: from edgewater-inn.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 0AE883F575; Thu, 6 Dec 2018 06:37:02 -0800 (PST) Received: by edgewater-inn.cambridge.arm.com (Postfix, from userid 1000) id 249F41AE0BCF; Thu, 6 Dec 2018 14:37:23 +0000 (GMT) Date: Thu, 6 Dec 2018 14:37:23 +0000 From: Will Deacon To: Rob Herring Cc: devicetree@vger.kernel.org, "linux-kernel@vger.kernel.org" , Sean Hudson , Frank Rowand , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , linuxppc-dev , Grant Likely , Kumar Gala , ARM-SoC Maintainers , Mark Rutland Subject: Re: [PATCH v2 08/34] dt-bindings: arm: Convert PMU binding to json-schema Message-ID: <20181206143722.GA14887@arm.com> References: <20181203213223.16986-1-robh@kernel.org> <20181203213223.16986-9-robh@kernel.org> <20181205100858.GA14619@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Dec 05, 2018 at 09:42:04AM -0600, Rob Herring wrote: > On Wed, Dec 5, 2018 at 4:08 AM Will Deacon wrote: > > On Mon, Dec 03, 2018 at 03:31:57PM -0600, Rob Herring wrote: > > > +properties: > > > + compatible: > > > + oneOf: > > > + - items: > > > + - enum: > > > + - apm,potenza-pmu > > > + - arm,armv8-pmuv3 > > > + - arm,cortex-a73-pmu > > > + - arm,cortex-a72-pmu > > > + - arm,cortex-a57-pmu > > > + - arm,cortex-a53-pmu > > > + - arm,cortex-a35-pmu > > > + - arm,cortex-a17-pmu > > > + - arm,cortex-a15-pmu > > > + - arm,cortex-a12-pmu > > > + - arm,cortex-a9-pmu > > > + - arm,cortex-a8-pmu > > > + - arm,cortex-a7-pmu > > > + - arm,cortex-a5-pmu > > > + - arm,arm11mpcore-pmu > > > + - arm,arm1176-pmu > > > + - arm,arm1136-pmu > > > + - brcm,vulcan-pmu > > > + - cavium,thunder-pmu > > > + - qcom,scorpion-pmu > > > + - qcom,scorpion-mp-pmu > > > + - qcom,krait-pmu > > > + - items: > > > + - const: arm,cortex-a7-pmu > > > + - const: arm,cortex-a15-pmu > > > > What do these last two mean? > > The first list only allows a single compatible string. This list says > there are 2 and that the compatible property should be: > compatible = "arm,cortex-a7-pmu", "arm,cortex-a15-pmu"; > > Which shows up here: > arch/arm/boot/dts/sun6i-a31.dtsi: compatible = > "arm,cortex-a7-pmu", "arm,cortex-a15-pmu"; > arch/arm/boot/dts/sun7i-a20.dtsi: compatible = > "arm,cortex-a7-pmu", "arm,cortex-a15-pmu"; > > Maybe the dts is wrong and should be fixed? Yes, that's wrong and you could end up with the kernel exposing the wrong events to userspace. So I think we can fix the .dts and leave the binding without this. > > > +required: > > > + - compatible > > > > I probably said this before, but I do think that it's a shame to lose the > > example binding, especially for something like the PMU where you can > > pretty much take an example and bang in your own IRQ numbers to get it > > up and running. > > I just thought it is so trivial that it didn't add much. I think most > folks would copy-n-paste from an actual dts file which has all the > other nodes you just need to update addresses and irq nums. True... even more of a reason to fix thise sun* .dts files then! Will