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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 609C0C433EF for ; Tue, 5 Oct 2021 07:14:29 +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 2C48E61409 for ; Tue, 5 Oct 2021 07:14:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2C48E61409 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=QXoP7H11p7BayIRpLd5s06kxTPYWuXVbEN73oO4mdX4=; b=mz4YuEB/qnSyc2 8O8sD8wqf2leYUrfUblJJBnnIGpZT2FJhpezaHCsKxjAy3JdqgGVW51uURmzeKR8aV1t2Mtp7KXII atj+BrjdnUhI2ALSK3khLdWNTL/Fpd8oRbPnGw3X3yr4vkxE46kNANb6FuQDq6ZpzhHRSt9FcWVle zm7kpV69Ve021z3zj+uS2gnaXlnA4B0yy3ItlOE4yRa5sgWPUOyKNTXRnKezJYlbS8uLx4VEoicEs JLbP1egUTrZQ1lu+yP+53WIyNzu7t4TorviiHbjNjK48R1ZyGiveAlMk90FHgo1mxHC1Bzbpn3r/n UGApaIy7byGb3oY2OBMA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mXed2-009HTF-VY; Tue, 05 Oct 2021 07:12:45 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mXecu-009HRM-Le for linux-arm-kernel@lists.infradead.org; Tue, 05 Oct 2021 07:12:42 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4AC6861506; Tue, 5 Oct 2021 07:12:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1633417956; bh=Z1Kyh4CmT/HAHgyMmHMMCSHGxms9KPY2yA5BUj5ZFLg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fCnJZF3GT8TJTOOoHPseEhYX2OVuS7WYLpZ3h2dcHx7a1PhFE9e9OxNIHbpT5F8PJ TK/qO6FF5eFOcjAYgEhdTvpi6vIuyrpEvR8lRQhaHfNSaUCApvEsAyszRCnGJCHiLG LKyqaQh6eQpNMOkeA1v4n0YkfOxY37o4FlEp/paZHfEm1f91KKqZ+dzmjaFneaEwBW lNAE4mJKT6CTNO6+S1RxkNEbHBSUuholIp/7XMbwUUwKNNCHubH+O/NbwTKOFCzQ98 +Jtt+S91lmXPhd77E8Fs090n3bt0b3FECB065apme/VW+lXCKEnOPNWQX7ExKQCBFU aAsuC9SG4KJ6g== Date: Tue, 5 Oct 2021 15:12:31 +0800 From: Shawn Guo To: Frieder Schrempf Cc: devicetree@vger.kernel.org, Frieder Schrempf , Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rob Herring , Sascha Hauer , stable@vger.kernel.org, Fabio Estevam , NXP Linux Team , Pengutronix Kernel Team Subject: Re: [PATCH 5/8] arm64: dts: imx8mm-kontron: Fix CAN SPI clock frequency Message-ID: <20211005071230.GC20743@dragon> References: <20210930155633.2745201-1-frieder@fris.de> <20210930155633.2745201-6-frieder@fris.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210930155633.2745201-6-frieder@fris.de> User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211005_001236_748538_B50FB3F3 X-CRM114-Status: GOOD ( 17.64 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Sep 30, 2021 at 05:56:28PM +0200, Frieder Schrempf wrote: > From: Frieder Schrempf > > The MCP2515 can be used with an SPI clock of up to 10 MHz. Set the > limit accordingly to prevent any performance issues caused by the > really low clock speed of 100 kHz. Could you share some testing result of this change? > > Fixes: 21c4f45b335f ("arm64: dts: Add the Kontron i.MX8M Mini SoMs and baseboards") It's really an optimization rather than fix, isn't it? Shawn > Cc: stable@vger.kernel.org > Signed-off-by: Frieder Schrempf > --- > arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts > index f2c8ccefd1bf..dbf11e03ecce 100644 > --- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts > +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts > @@ -98,7 +98,7 @@ can0: can@0 { > clocks = <&osc_can>; > interrupt-parent = <&gpio4>; > interrupts = <28 IRQ_TYPE_EDGE_FALLING>; > - spi-max-frequency = <100000>; > + spi-max-frequency = <10000000>; > vdd-supply = <®_vdd_3v3>; > xceiver-supply = <®_vdd_5v>; > }; > -- > 2.33.0 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel