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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3818AC433F5 for ; Fri, 1 Apr 2022 18:24:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236339AbiDAS0J (ORCPT ); Fri, 1 Apr 2022 14:26:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233663AbiDAS0G (ORCPT ); Fri, 1 Apr 2022 14:26:06 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 126DE17FD3E; Fri, 1 Apr 2022 11:24:16 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B4955B825B1; Fri, 1 Apr 2022 18:24:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 643DDC340EE; Fri, 1 Apr 2022 18:24:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1648837453; bh=rcBit4D+cJoPaMnAkofaQ1xtj/Y+I4p055Ym5x4wpfg=; h=In-Reply-To:References:Subject:From:Cc:To:Date:From; b=RHgJE8FS1xd73mO0tEcxy32mK8k0oW+n5FvSrRwp7qXoCHklunZnWADnIxsgwHIkx LSFEc8hkCjv6tHrZp8kOKfD3Sh34+R8VuWKmHeXT1cE9+Ru5aSOvubifCsmPUWgvO8 2uD8kjzvMZPcQY4IbzO3rIWu9T9GAZZ/tMn/GCx6AjvjJpf89wObMEcMxTt2OsGKwb EUn+Up6C/MUZjFApbX4rlQ0eOVEVMp+FXnwZ6RlkXKXXbcHM/Gh6+ZPaHQ3BmXmKcv 9ROrR2SNVB/R5DVLrk58YeiCLevP5lQsukCQRa5nAeojjWdmavQZzh4nHJF9mnSfag rybfMxJ6QHerQ== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable In-Reply-To: <3107512.vfdyTQepKt@diego> References: <20220329111323.3569-1-jbx6244@gmail.com> <20220331225134.7A0A9C340ED@smtp.kernel.org> <3107512.vfdyTQepKt@diego> Subject: Re: [PATCH v3 1/2] dt-bindings: clock: convert rockchip,rk3188-cru.txt to YAML From: Stephen Boyd Cc: robh+dt@kernel.org, krzk+dt@kernel.org, mturquette@baylibre.com, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org To: Heiko =?utf-8?q?St=C3=BCbner?= , Johan Jonker , zhangqing@rock-chips.com Date: Fri, 01 Apr 2022 11:24:11 -0700 User-Agent: alot/0.10 Message-Id: <20220401182413.643DDC340EE@smtp.kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoting Heiko St=C3=BCbner (2022-04-01 00:55:55) > Hi Stephen, >=20 > Am Freitag, 1. April 2022, 00:51:32 CEST schrieb Stephen Boyd: > > Quoting Johan Jonker (2022-03-29 04:13:22) > > > diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3188-= cru.yaml b/Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.yaml > > > new file mode 100644 > > > index 000000000..ddd7e46af > > > --- /dev/null > > > +++ b/Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.yaml > > > @@ -0,0 +1,78 @@ > > > +# SPDX-License-Identifier: GPL-2.0 > > > +%YAML 1.2 > > > +--- > > > +$id: http://devicetree.org/schemas/clock/rockchip,rk3188-cru.yaml# > > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > > + > > > +title: Rockchip RK3188/RK3066 Clock and Reset Unit (CRU) > > > + > > > +maintainers: > > > + - Elaine Zhang > > > + - Heiko Stuebner > > > + > > > +description: | > > > + The RK3188/RK3066 clock controller generates and supplies clocks t= o various > > > + controllers within the SoC and also implements a reset controller = for SoC > > > + peripherals. > > > + Each clock is assigned an identifier and client nodes can use this= identifier > > > + to specify the clock which they consume. All available clocks are = defined as > > > + preprocessor macros in the dt-bindings/clock/rk3188-cru.h and > > > + dt-bindings/clock/rk3066-cru.h headers and can be used in device t= ree sources. > > > + Similar macros exist for the reset sources in these files. > > > + There are several clocks that are generated outside the SoC. It is= expected > > > + that they are defined using standard clock bindings with following > > > + clock-output-names: > > > + - "xin24m" - crystal input - required > > > + - "xin32k" - RTC clock - optional > > > + - "xin27m" - 27mhz crystal input on RK3066 - optional > > > + - "ext_hsadc" - external HSADC clock - optional > > > + - "ext_cif0" - external camera clock - optional > > > + - "ext_rmii" - external RMII clock - optional > > > + - "ext_jtag" - external JTAG clock - optional > >=20 > > I'd expect all these clks here to be inputs to this node. >=20 > The optional clocks are all part of a circular dependency. >=20 > So for example xin32k normally is generated by the pmic and fed > back into the system, so to get xin32k, we need the pmic to probe, > which needs i2c, which in turn already needs the clock controller. >=20 > Or optional clocks may not be available at all. >=20 > So for the past years we already relied on the clock-system's > self adaptation if a clock becomes available at some point > during later boot and hence do not have those in a clocks-property. >=20 Are you saying that we can't have these clks in the clocks property because there's a circular driver probe dependency? I don't see how that matters for the dt binding. What is broken if they're put in the binding and specified in the node? 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 55401C433EF for ; Fri, 1 Apr 2022 18:24:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:To:Cc:From:Subject: References:In-Reply-To:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=9b6VTD1GfLSBXsupf2tj16nilpmlwKHhDL/LdhEhXf0=; b=U4lIfBdeQ3S4sf cPOSoU6aQGPaZDjwyIYVLnu4bu1hUUVNF9xMJtYHun+0P1K7idUni1tE5/ZmZKmO92MHqbrbYMEFE w7WeCa+/YmbPYRlXzFsDiOS85pPczNzqLt3A9d/kHMzTHQZTpRc7+Z+cY9pLsKwux2i+St4jDuON3 n7W1UhwaJt7XdRpQJ1IN1r3GuG36JtWvbTV1B69LlGoOUoPQ4ihp6rE21DOLM9RgAkkHJMjpRIIKj frLh8xxNYoZgB7AH7DR8HXxT88P6pz5WAlbPwFrTzJZdLvdwIdB7MCbKaIXYW0WYD3ons7IbqYpso W419gWr5BkZ5PIWvmRkg==; 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