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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id E782FC433EF for ; Wed, 13 Apr 2022 12:44:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:CC:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8z4hiTsjOGzra+hLkRf81bFJaWjcStOBvCXs/xlTixo=; b=x4fkhln8FdZVaC 8CYP3GxPGOb2JhRkSTJCV/2Q+PLaFaUGf/r7/nzKWe6LXNVr5uSth2Mz/0Rn4YykzMMK3x7MrUzbt MCwwB+IWm6cBVcMi+96Jc+9CeQS6BH5s+felfGB5K/LyfW2vZ2+1SMFSQa94sATNmDql0oIaYlKtW X7e5MbFQLuaGLqwGqiPn/h4dOpIT38Zq4aW5wofCZ8Fdt4B4XIYG+C6VlPe2k3ZkkGL8Mtvf9ADEn Md4wRfIp8UDSqse/ZRh63NuKz/4k0TC9+GreN5Z0bgP/yBQxudJUi0S1jy/XQxDuiVEcUaszdc2Gj /MEt5j+kcBYr5VXTa3ow==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1necLm-0012oe-Na; Wed, 13 Apr 2022 12:43:58 +0000 Received: from esa.microchip.iphmx.com ([68.232.153.233]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1necLZ-0012iR-Qg for linux-arm-kernel@lists.infradead.org; Wed, 13 Apr 2022 12:43:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1649853827; x=1681389827; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=PyZB99kmdmF++hcpBMCZkS0+ko1iFOj2LBTNcFSP+G8=; b=IfDqCRosAdi6+QjMXczuN5FcXuJYSnTVMDyALjDM0yc3UVzHS4XzwKhi itRrqQKydq0G6vNjE9Cwr1r9vo+ha6gDSNPR18CPzhtD+dvp0c/UxzLId 5tSDm6JPbYpv72YugbKZjFSri0Z7mDq14ED9hcoPr5Ek69PLjMIw2zbP5 uSOUj8tRIi3CT4jk8X637k5LfUBcqiKljmc382i7Ar9ZPW1yOpeGGSY1B 2dZE1Wzl7EMw/rnDyjrXVt6B5bhfpJoeV1bbvOWRVaXD7FXdZ/GwJj1Ry SBAeCF0wSnAqRw2LAXNzWuK9yfwLx4MlXBfFX6xPQvfWYh/MEfqvctbDs A==; X-IronPort-AV: E=Sophos;i="5.90,256,1643698800"; d="scan'208";a="159967363" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa5.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 13 Apr 2022 05:43:46 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Wed, 13 Apr 2022 05:43:44 -0700 Received: from [10.12.72.146] (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Wed, 13 Apr 2022 05:43:42 -0700 Message-ID: Date: Wed, 13 Apr 2022 14:43:42 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [PATCH] ARM: dts: at91: sama7g5ek: Align the impedance of the QSPI0's HSIO and PCB lines Content-Language: en-US To: Tudor Ambarus , CC: , , , , "Mihai Sain" References: <20220406130505.422042-1-tudor.ambarus@microchip.com> From: Nicolas Ferre Organization: microchip In-Reply-To: <20220406130505.422042-1-tudor.ambarus@microchip.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220413_054345_962405_D51EC022 X-CRM114-Status: GOOD ( 16.17 ) 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-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 06/04/2022 at 15:05, Tudor Ambarus wrote: > The impedance of the QSPI PCB lines on the sama7g5ek is 50 Ohms. > Align the output impedance of the QSPI0 HSIOs by setting a medium drive > strength which corresponds to an impedance of 56 Ohms when VDD is in the > 3.0V - 3.6V range. The high drive strength setting corresponds to an > output impedance of 42 Ohms on the QSPI0 HSIOs. > > Suggested-by: Mihai Sain > Signed-off-by: Tudor Ambarus Acked-by: Nicolas Ferre Queued in fixes branch for 5.18. Thanks! Best regards, Nicolas > --- > arch/arm/boot/dts/at91-sama7g5ek.dts | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm/boot/dts/at91-sama7g5ek.dts b/arch/arm/boot/dts/at91-sama7g5ek.dts > index 08685a10eda1..8f9643170ba3 100644 > --- a/arch/arm/boot/dts/at91-sama7g5ek.dts > +++ b/arch/arm/boot/dts/at91-sama7g5ek.dts > @@ -655,7 +655,7 @@ pinctrl_qspi: qspi { > ; > bias-disable; > slew-rate = <0>; > - atmel,drive-strength = ; > + atmel,drive-strength = ; > }; > > pinctrl_sdmmc0_default: sdmmc0_default { -- Nicolas Ferre _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel