From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753129AbdFVKYt (ORCPT ); Thu, 22 Jun 2017 06:24:49 -0400 Received: from mail-ot0-f194.google.com ([74.125.82.194]:33136 "EHLO mail-ot0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752743AbdFVKYr (ORCPT ); Thu, 22 Jun 2017 06:24:47 -0400 MIME-Version: 1.0 In-Reply-To: <20170620012411.GF4493@codeaurora.org> References: <20170618015855.27738-1-chunyan.zhang@spreadtrum.com> <20170618015855.27738-10-chunyan.zhang@spreadtrum.com> <20170620012411.GF4493@codeaurora.org> From: Chunyan Zhang Date: Thu, 22 Jun 2017 18:24:45 +0800 Message-ID: Subject: Re: [PATCH V1 9/9] arm64: dts: add ccu for SC9860 To: Stephen Boyd Cc: Chunyan Zhang , Michael Turquette , Rob Herring , Mark Rutland , linux-clk@vger.kernel.org, "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Arnd Bergmann , Mark Brown , Xiaolong Zhang , Orson Zhai , Geng Ren , Ben Li Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Stephen, On 20 June 2017 at 09:24, Stephen Boyd wrote: > On 06/18, Chunyan Zhang wrote: >> diff --git a/arch/arm64/boot/dts/sprd/sc9860-ccu.dtsi b/arch/arm64/boot/dts/sprd/sc9860-ccu.dtsi >> new file mode 100644 >> index 0000000..e15bf2d >> --- /dev/null >> +++ b/arch/arm64/boot/dts/sprd/sc9860-ccu.dtsi >> @@ -0,0 +1,67 @@ >> +/* >> + * Spreadtrum SC9860 SoC CCU >> + * >> + * Copyright (C) 2017, Spreadtrum Communications Inc. >> + * >> + * SPDX-License-Identifier: (GPL-2.0+ OR MIT) >> + */ >> + >> +&soc { >> + ext_26m: ext-26m { >> + compatible = "fixed-clock"; >> + #clock-cells = <0>; >> + clock-frequency = <26000000>; >> + clock-output-names = "ext-26m"; >> + }; >> + >> + ext_32m_sine0: ext-32m-sine0 { >> + compatible = "fixed-clock"; >> + #clock-cells = <0>; >> + clock-frequency = <32000000>; >> + clock-output-names = "ext-32m-sine0"; >> + }; >> + >> + ext_32m_sine1: ext-32m-sine1 { >> + compatible = "fixed-clock"; >> + #clock-cells = <0>; >> + clock-frequency = <32000000>; >> + clock-output-names = "ext-32m-sine1"; >> + }; >> + >> + ext_rco_100m: ext-rco-100m { >> + compatible = "fixed-clock"; >> + #clock-cells = <0>; >> + clock-frequency = <100000000>; >> + clock-output-names = "ext-rco-100m"; >> + }; >> + >> + ext_32k: ext-32k { >> + compatible = "fixed-clock"; >> + #clock-cells = <0>; >> + clock-frequency = <32768>; >> + clock-output-names = "ext-32k"; >> + }; > > These should all be outside of the soc node as they're probably > on the board and not the SoC? The hint is that they don't have a > reg property. > >> + >> + ccu: clk { > > clock-controller is a more standard node name. OK, will address. > >> + compatible = "sprd,sc9860-ccu"; >> + #clock-cells = <1>; >> + reg = <0 0x20000000 0 0x400>, >> + <0 0x20210000 0 0x3000>, >> + <0 0x402b0000 0 0x4000>, >> + <0 0x402d0000 0 0x400>, >> + <0 0x402e0000 0 0x4000>, >> + <0 0x40400000 0 0x400>, >> + <0 0x40880000 0 0x400>, >> + <0 0x415e0000 0 0x400>, >> + <0 0x60200000 0 0x400>, >> + <0 0x61000000 0 0x400>, >> + <0 0x61100000 0 0x3000>, >> + <0 0x62000000 0 0x4000>, >> + <0 0x62100000 0 0x4000>, >> + <0 0x63000000 0 0x400>, >> + <0 0x63100000 0 0x3000>, >> + <0 0x70b00000 0 0x3000>; > > There are a lot of reg properties here. Perhaps there needs to be > different nodes for the different clock controllers in this SoC? > On Spreadtrum's platform, clocks are basically located in a few address areas due to some hardware design issue, that says there're more than one kinds of clocks in one address range, and one kind of clocks have more than one physical address bases, except ccu_pll and ccu_div in this patchset. We're planning to map the whole device area at one time before initializing each of them, once that has been done and upstreamed, I will remove these lists of addressed. Thanks for your review, Chunyan >> + clocks = <&ext_26m>, <&ext_rco_100m>, <&ext_32k>; >> + clock-names = "ext-26m", "ext-rco-100m", "ext-32k"; >> + }; > > -- > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, > a Linux Foundation Collaborative Project