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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED 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 680E3C43144 for ; Wed, 27 Jun 2018 14:56:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 07FA525F6E for ; Wed, 27 Jun 2018 14:56:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="nSeSiNQM" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 07FA525F6E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 S934566AbeF0O4E (ORCPT ); Wed, 27 Jun 2018 10:56:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:44578 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933868AbeF0O4C (ORCPT ); Wed, 27 Jun 2018 10:56:02 -0400 Received: from [192.168.1.22] (cpe-70-114-128-244.austin.res.rr.com [70.114.128.244]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 71BB825EFB; Wed, 27 Jun 2018 14:56:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1530111361; bh=8sK6GdLClZNK93uZBpJ5V9yM8eIfcjf+6F6yicfqJhI=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=nSeSiNQMcLrEoc4C52pmGfc3UWLmyEI6CFOMKcxqWOb6q/rg9TkEvEmSe1PASOu4/ D1eLJesORQCRKtcvMkSiKp0Ghu5xTGFzv2oNCOHh6h8UoyuquowAejEt3iW7JijYMR z0rUR4DPN+4xWt0TXVTBDtaaQaX8ze0IQh1h3g6I= Subject: Re: [PATCH] arm: dts: socfpga: denali needs nand_x_clk too To: Masahiro Yamada , Miquel Raynal Cc: Mark Rutland , DTML , Richard Weinberger , Linux Kernel Mailing List , Boris Brezillon , Rob Herring , linux-mtd , Brian Norris , David Woodhouse , =?UTF-8?Q?Marek_Va=c5=a1ut?= References: <20180619120719.26921-1-richard@nod.at> <3320422.EJ8D6C0VHL@blindfold> <20180625165506.484e025f@bbrezillon> <20180626200928.29aca979@xps13> From: Dinh Nguyen Openpgp: preference=signencrypt Autocrypt: addr=dinguyen@kernel.org; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Masahiro, On 06/26/2018 09:52 PM, Masahiro Yamada wrote: > 2018-06-27 3:09 GMT+09:00 Miquel Raynal : >> Hi Masahiro, >> >> On Tue, 26 Jun 2018 11:38:21 +0900, Masahiro Yamada >> wrote: >> >>> 2018-06-25 23:55 GMT+09:00 Boris Brezillon : >>>> On Mon, 25 Jun 2018 09:50:18 -0500 >>>> Dinh Nguyen wrote: >>>> >>>>> On 06/22/2018 10:58 AM, Richard Weinberger wrote: >>>>>> Masahiro, >>>>>> >>>>>> Am Freitag, 22. Juni 2018, 16:37:21 CEST schrieb Masahiro Yamada: >>>>>>> Hi Richard, >>>>>>> >>>>>>> >>>>>>> 2018-06-19 21:07 GMT+09:00 Richard Weinberger : >>>>>>>> The denali NAND flash controller needs at least two clocks to operate, >>>>>>>> nand_clk and nand_x_clk. >>>>>>>> Since 1bb88666775e ("mtd: nand: denali: handle timing parameters by >>>>>>>> setup_data_interface()") nand_x_clk is used to derive timing settings. >>>>>>>> >>>>>>>> Signed-off-by: Richard Weinberger >>>>>>>> --- >>>>>>>> Strictly speaking denali needs a ecc_clk too, but AFAIK such a clock >>>>>>>> is not present on this SoC. >>>>>>>> But my SoCFPGA knowledge is very limited. >>>>>>>> >>>>>>>> Thanks, >>>>>>>> //richard >>>>>>>> --- >>>>>>>> arch/arm/boot/dts/socfpga.dtsi | 3 ++- >>>>>>>> 1 file changed, 2 insertions(+), 1 deletion(-) >>>>>>>> >>>>>>>> diff --git a/arch/arm/boot/dts/socfpga.dtsi b/arch/arm/boot/dts/socfpga.dtsi >>>>>>>> index 486d4e7433ed..562f7b375bbd 100644 >>>>>>>> --- a/arch/arm/boot/dts/socfpga.dtsi >>>>>>>> +++ b/arch/arm/boot/dts/socfpga.dtsi >>>>>>>> @@ -754,7 +754,8 @@ >>>>>>>> reg-names = "nand_data", "denali_reg"; >>>>>>>> interrupts = <0x0 0x90 0x4>; >>>>>>>> dma-mask = <0xffffffff>; >>>>>>>> - clocks = <&nand_clk>; >>>>>>>> + clocks = <&nand_clk>, <&nand_x_clk>; >>>>>>>> + clock-names = "nand", "nand_x"; >>>>>>> >>>>>>> >>>>>>> IMHO, this should be >>>>>>> >>>>>>> clocks = <&nand_clk>, <&nand_x_clk>, <&nand_x_clk>; >>>>>>> clock-names = "nand", "nand_x", "ecc"; >>>>> >>>>> No, it should be just the nand_x and ecc. >>>>> >>>>> There's already a patch to use the nand_x_clk and not the nand_clk. >>> >>> >>> Different people try to fix the problem in different ways. >>> >>> I think it is due to miscommunication across sub-systems. >> >> Is the series named >> >> mtd: rawnand: denali: add new clocks and improve >> setup_data_interface >> >> still valid? > > Yes. > I believe V4 is valid. > > > Information for Dinh Nguyen: > > http://patchwork.ozlabs.org/patch/933507/ > http://patchwork.ozlabs.org/patch/933487/ > http://patchwork.ozlabs.org/patch/933494/ > http://patchwork.ozlabs.org/patch/933506/ > > > If he is not convinced, I am open to discussion, though. I wasn't aware of these patches. This patch is staged to go into v4.17-rc3 through the arm-soc: https://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git/commit/arch/arm/boot/dts/socfpga.dtsi?h=fixes&id=4eda9b766b042ea38d84df91581b03f6145a2ab0 I think your patch will handle a case where only 1 clock is passed in, so it should be okay right? Dinh