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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0E0CC433FE for ; Thu, 24 Mar 2022 15:58:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351505AbiCXP7f (ORCPT ); Thu, 24 Mar 2022 11:59:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59664 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351519AbiCXP71 (ORCPT ); Thu, 24 Mar 2022 11:59:27 -0400 Received: from mout.perfora.net (mout.perfora.net [74.208.4.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 61CA8ADD6C; Thu, 24 Mar 2022 08:57:41 -0700 (PDT) Received: from localhost.localdomain ([81.221.85.15]) by mrelay.perfora.net (mreueus004 [74.208.5.2]) with ESMTPSA (Nemesis) id 1MCauF-1nPTk73LzX-009gNd; Thu, 24 Mar 2022 16:57:25 +0100 From: Marcel Ziswiler To: linux-arm-kernel@lists.infradead.org Cc: Marcel Ziswiler , Andrejs Cainikovs , Arnd Bergmann , Fabio Estevam , Frank Rowand , Krzysztof Kozlowski , NXP Linux Team , Olof Johansson , Pengutronix Kernel Team , Rob Herring , Sascha Hauer , Shawn Guo , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 09/10] arm64: dts: imx8mm-verdin: note about disabled sd1 pull-ups Date: Thu, 24 Mar 2022 16:56:48 +0100 Message-Id: <20220324155649.285924-10-marcel@ziswiler.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220324155649.285924-1-marcel@ziswiler.com> References: <20220324155649.285924-1-marcel@ziswiler.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:J0L8YMNV2NU16ziuUi4evV7m5GogN7KvqRKUdIp6eeQf5yCXUv3 M+uVnYvHD+A9act5Wq8lV8KGcoH8GwC+Uso+SNMdWS6fuDGS5fNxvVQ3G0CpKa2SS28OKyc nq7IZNIxMuHIwOkxtLBVIl4NrgI3CzZ9N0E6edQ4sbrtZ8fIe4f4d4bkWHBQbfULFBTf+mi ++M2/0hwy/U+koagUdKqQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:ofsBzLGGVaY=:TFYqjvQV4bBu3TToWdb8WI 34plTcYjChlVtsE2BUeIZnWs5sw+7vWXFLRta/aixoUNsHOvOJblfQ/XiSui26m3fKXgfuUDT wJBrCoOYsGlxTrHi9KY2Azrk8q5ixjRbsKYEvQx2LLpkEgcjpdjL1rz9t9RlGaN1hMZG6xGBp nTwgHi2SERPty02b3G5apXs58MbcKFbPrbJtWYeDKeuHeKOuQrvcmY4k/L5x2lxbfBqj5aQoT X43z66XaUpfIiPcy2ZRhZON4PNADRx7bkoousRxmMp5PO9EvrA7mxbSvSa/EIRZ0+39/c8omc alZoxWiWoGkIenuBQ5vuTfjD1iGqaP66fANjYwn7SGbg/dFO/Z7CC4ahB3rmsbm0K469VLEDv zbUt1S5uZLdT7UZUEi2jjS6ZbNeB7OG7/fSxibhRPYsXYo9aQkNepXZJUZG2bskUK5TQ9NRqH 4qb07IARFA+/gzNK4wUQusXlfpG5a+r8jJj4bvepBGA+kVDUNkQmDHxg4Qc0Nerk1UCB3PcKv EdPHObu0JlGWnbL/cQaTzewjhz/MHXm0nwAPe5M2lHy5CzsoJLpPXzZ3lldPwVXpam+V+Mn1n QVS368gUUtsTSTZM5YLruezDttGxP7eD2IQfYaEg4mtdrO+sMqUQBKly6fpX+CSsV3CsTs1qj VRIV0miblYdJ13k0oYGld3rDY1G++H2blCJ7qdxRat63KtxhJrtKWkf0MfcRXuGEf8Qx33fsB KYYtuKvRESDrKdkm Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Marcel Ziswiler Add a note about us using discrete external on-module resistors pulling-up to the on-module +V3.3_1.8_SD (LDO5) rail and explicitly disabling the internal pull-ups due to ERR050080 [1]: IO: Degradation of internal IO pullup/pulldown current capability for IO’s continuously driven in a 3.3V operating mode [1] https://www.nxp.com/webapp/Download?colCode=IMX8MM_0N87W Signed-off-by: Marcel Ziswiler --- arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi index 6e1c762fd2e7..97dd7a00d63b 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi @@ -1179,6 +1179,10 @@ pinctrl_usdhc2_pwr_en: usdhc2pwrengrp { ; /* SODIMM 76 */ }; + /* + * Note: Due to ERR050080 we use discrete external on-module resistors pulling-up to the + * on-module +V3.3_1.8_SD (LDO5) rail and explicitly disable the internal pull-ups here. + */ pinctrl_usdhc2: usdhc2grp { fsl,pins = , -- 2.34.1