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=-4.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, 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 AB1FAC43381 for ; Tue, 26 Feb 2019 18:08:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7979221852 for ; Tue, 26 Feb 2019 18:08:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551204522; bh=6luI78bJ4FYRrCrd9j5W8oBLzCAaME+1lLXedunPT7k=; h=To:References:Cc:Subject:From:In-Reply-To:Date:List-ID:From; b=PiFEGXmImG8klOFBr39fdliS3pk8RspOzBtITNE+gs+AhHbdHL1bXEp7QD8MTPUk3 hgQbobH7W2h07KisUf+lLBJbBfu5zryEztoTgbIO2Z6pEDBWYjhmPpDRJpJc8SuWR+ CVyHL6kClvhRYuoSPS0wpMiorZ3Q0sOvj2OGuv2o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728956AbfBZSIl (ORCPT ); Tue, 26 Feb 2019 13:08:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:46352 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728456AbfBZSIk (ORCPT ); Tue, 26 Feb 2019 13:08:40 -0500 Received: from localhost (unknown [104.132.0.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D2468217F5; Tue, 26 Feb 2019 18:08:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551204519; bh=6luI78bJ4FYRrCrd9j5W8oBLzCAaME+1lLXedunPT7k=; h=To:References:Cc:Subject:From:In-Reply-To:Date:From; b=K011+sfjrQJFpSVn8+2/GWdhhs+yGwngpiYn1zyWAriEJmyHOWTTPseavnAwEhJHK Zv+MsW7R2fUw598EUTTPROoUbCwOlkPzjBM7Wso31A7Xb/WHxhlrznT1PB2bApUEbx pB/YjiLWlr1VK2GY+g29bIr8S4+px8Yw0rOmHG9w= Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable To: "devicetree@vger.kernel.org" , "festevam@gmail.com" , "kernel@pengutronix.de" , "linux-arm-kernel@lists.infradead.org" , "linux-clk@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "mark.rutland@arm.com" , "mturquette@baylibre.com" , "robh+dt@kernel.org" , "s.hauer@pengutronix.de" , "shawnguo@kernel.org" , Aisheng Dong , Anson Huang , Daniel Baluta References: <1551157967-30925-1-git-send-email-Anson.Huang@nxp.com> <1551157967-30925-2-git-send-email-Anson.Huang@nxp.com> Message-ID: <155120451899.260864.1060210942751564859@swboyd.mtv.corp.google.com> User-Agent: alot/0.8 Cc: dl-linux-imx Subject: Re: [PATCH V7 2/2] clk: imx: scu: add cpu frequency scaling support From: Stephen Boyd In-Reply-To: <1551157967-30925-2-git-send-email-Anson.Huang@nxp.com> Date: Tue, 26 Feb 2019 10:08:38 -0800 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoting Anson Huang (2019-02-25 21:17:36) > On NXP's i.MX SoCs with system controller inside, CPU frequency > scaling can ONLY be done by system controller firmware, and it > can ONLY be requested from secure mode, so Linux kernel has to > call ARM SMC to trap to ARM-Trusted-Firmware to request system > controller firmware to do CPU frequency scaling. >=20 > This patch adds i.MX system controller CPU frequency scaling support, > it reuses cpufreq-dt driver and implement the CPU frequency scaling > inside SCU clock driver. >=20 > Signed-off-by: Anson Huang > --- Applied to clk-next