From patchwork Wed Mar 27 19:26:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Folker Schwesinger X-Patchwork-Id: 13607415 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 9645DC47DD9 for ; Wed, 27 Mar 2024 20:33:39 +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-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=yx5FDFiLw1L8ueszqd9AkB7Q79ms1se0U6q0+rE0+0I=; b=Yww0ZzPLcteXYT GLkuclEivbVu58BXz9dxlamlL4CXJTOkeilajEnf99tiot2pCZrPNuKAUs2weKfCeDu2kXYxPUmPI tAoY36durKYuqiXuIc+kTp3Biv8eH6oCzhFwvwoZgM3gZePS2FqU01gvm9rzBzz5c5Zd4M6w9fX80 go0SKTwH9ZZsIZ5TFwxGi8V+zLNzZVbeAar4ojlFmQhbewM7v+2g+31Wz5fx+WhVspL/pLu6i5cLG MZBnCPsUcWYVY0RQNA1YkLn3AeU2QMYT3pfgxxfsWyV9Kjr8Jv99qyAQt8yFratasTtfNBJt6xBQV DS2UnYEGl/LdzRc73eJg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rpZxg-0000000B23e-28oE; Wed, 27 Mar 2024 20:33:28 +0000 Received: from www522.your-server.de ([195.201.215.122]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rpYvN-0000000An96-17D8; Wed, 27 Mar 2024 19:27:03 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=folker-schwesinger.de; s=default2212; h=Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References; bh=ewabUOMzJnwQzsx6uM+32Ptxk3uRoq9dz5K5trAa2Tw=; b=cfBOblgaCQsVMKWXs7JvuzXIpt 5KYTQCi9mGlYqAPuWWxGrm24kSe+DDWVQ30C72djLQTnWYRhzIK/9a9vk389Uas8F84Unksc8ZIdw E2I/OtC7o5MI/LqfegdkmnqysdsCiuQCctTu1SOGtIhrp4h0mBsPMO4PmHouM13JgazZ0evyYPJXj nM+ZyhQbo7gTQ6dPiZ9A6YKwLLCTlzZbV0XMNjtsxtS4uS+Zb/O0661CHcPLBkPboNhIeC7p0sFCc I++e6nX1rxgaogmbTKYecoFuISFtwPwsg93zg/trZm+HMoLs/MXQvaYj4t3pDKjouPY/bqMqr/Zi7 tQCC02PA==; Received: from sslproxy06.your-server.de ([78.46.172.3]) by www522.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1rpYvD-000IpD-Qg; Wed, 27 Mar 2024 20:26:51 +0100 Received: from [185.209.196.215] (helo=homedev.localdomain) by sslproxy06.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1rpYvD-000Iyc-5O; Wed, 27 Mar 2024 20:26:51 +0100 From: Folker Schwesinger To: Vinod Koul , Yogesh Hegde , Heiko Stuebner , Chris Ruehl , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Folker Schwesinger , Dragan Simic , Christopher Obbard , linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 0/2] Enable internal strobe pulldown on Radxa ROCK 4 SBCs Date: Wed, 27 Mar 2024 20:26:36 +0100 Message-ID: <20240327192641.14220-1-dev@folker-schwesinger.de> X-Mailer: git-send-email 2.44.0 MIME-Version: 1.0 X-Authenticated-Sender: dev@folker-schwesinger.de X-Virus-Scanned: Clear (ClamAV 0.103.10/27227/Wed Mar 27 09:33:27 2024) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240327_122701_624857_3893B5FC X-CRM114-Status: UNSURE ( 9.51 ) X-CRM114-Notice: Please train this message. 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Various RK3399 boards, including the ROCK Pi 4 series showed instabilities with some eMMC modules when operating in HS400 mode [1]. Later, a missing pull-down resistor on the eMMC strobe line was identified as the root cause of these instabilities [2]. This series enables the internal pull-down on the eMMC PHY strobe line for all ROCK 4 series boards as they all lack an external strobe pull-down resistor. Furthermore, HS400 mode is re-enabled for these boards. Previously, to workaround the instabilities until the issue was investigated further, HS400 mode was replaced with HS200 mode [1]. [1]: https://lore.kernel.org/all/20230705144255.115299-1-chris.obbard@collabora.com/ [2]: https://lore.kernel.org/all/20220822074139.3810-1-jensenhuang@friendlyarm.com/ Folker Schwesinger (2): arm64: dts: rockchip: Add enable-strobe-pulldown to emmc phy on ROCK Pi 4 arm64: dts: rockchip: Add enable-strobe-pulldown to emmc phy on ROCK 4C+ arch/arm64/boot/dts/rockchip/rk3399-rock-4c-plus.dts | 4 +++- arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-) base-commit: 4cece764965020c22cff7665b18a012006359095