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=-4.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 2C60FC43381 for ; Sat, 16 Feb 2019 00:40:27 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id EF8F2222DD for ; Sat, 16 Feb 2019 00:40:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="aC/pUPS2"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="J2LmySMk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EF8F2222DD 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-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Date:From:References:Message-ID:Subject :In-Reply-To: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=nlkb4STo25VwM0BVEMaVa290LGU1923UnSRCLic4wqs=; b=aC/pUPS2oMRP/Q JDQ4M6poznN5mKWqLWGaoRoKhaR4J/7cxa0o16CkpIukbpoAxBXZKK8r/S5VKtX96m5krVsK+Xvwx Y91gS3i+0rB3O++5aQGRnvTgRyCzVVtuhaRQk2KkM34zL+RRCxQDvjte1ey9bXUqCktz2fCrdPiL+ vqcK6ZhSDwwMwydNtr5Vddp7Lt7fcS9Mr/iyyDttP9wvxnpuSdizAuP76cOppNzcF2pqb7GKStA+K G1MvNqT2Tj/qiN88epuNJoiQoGy/D8uq4p6dQZQ87DdNGJZAvloyTkRu61+iKLjOGftdI54PGu7pL GhnpJo1WdpTHQhYDH13A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1guo1n-0000ZL-C9; Sat, 16 Feb 2019 00:40:23 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1guo1k-0000Z2-M2 for linux-arm-kernel@lists.infradead.org; Sat, 16 Feb 2019 00:40:21 +0000 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 49168222A1; Sat, 16 Feb 2019 00:40:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550277620; bh=O5tMFdEraOHdNmuSg5PUk6dWxbx6ysYD6z0WMVZZZyE=; h=To:In-Reply-To:Subject:References:Cc:From:Date:From; b=J2LmySMkhDzjYGgkXhfXO3JDaXBMArPrId82r9KN1iR2WE4X2uX9BtU/1ocJHBrER pY6B7EaHzYCuzX3BqpOH5TbkL6gW6dkPi4+UPGj0ztSThODvPUZfEKumfDVlYsvQ8i cHImqFfPR8GP+Y2FjAMrSiLSjS5UsfrD5NgK0w10= MIME-Version: 1.0 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" , "viresh.kumar@linaro.org" , Aisheng Dong , Anson Huang , Daniel Baluta In-Reply-To: <1550137826-18531-2-git-send-email-Anson.Huang@nxp.com> User-Agent: alot/0.8 Subject: Re: [PATCH V6 2/2] clk: imx: scu: add cpu frequency scaling support Message-ID: <155027761947.115909.17708921995062238540@swboyd.mtv.corp.google.com> References: <1550137826-18531-1-git-send-email-Anson.Huang@nxp.com> <1550137826-18531-2-git-send-email-Anson.Huang@nxp.com> From: Stephen Boyd Date: Fri, 15 Feb 2019 16:40:19 -0800 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190215_164020_739836_41460163 X-CRM114-Status: UNSURE ( 8.23 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dl-linux-imx Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Quoting Anson Huang (2019-02-14 01:55:57) > 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. > > 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. > > Signed-off-by: Anson Huang > --- Acked-by: Stephen Boyd _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel