From patchwork Mon Mar 1 16:03:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 389483 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT 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 93D37C433E6 for ; Mon, 1 Mar 2021 19:12:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 53FED64ED0 for ; Mon, 1 Mar 2021 19:12:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241117AbhCATMP (ORCPT ); Mon, 1 Mar 2021 14:12:15 -0500 Received: from mail.kernel.org ([198.145.29.99]:36380 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240946AbhCATGe (ORCPT ); Mon, 1 Mar 2021 14:06:34 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id E23FD6526C; Mon, 1 Mar 2021 17:35:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614620153; bh=FLMp82SAN4JtOo9+0ryMpY2ma3al5ZgYRumOG6TdWb4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DWiSldaI7TWv4hVx+gLNa3Vnx1WSNkZ20DfkFKUWl0PJaIHCT0wpmK3FTGH2JArw5 HO9KSB1Raeudy0OYvd85NVwkOCgzXABstWoIf6NP5vPFXiobGvwQiEac6OelttQiWT iK+2pprZzqvTl22Meskk6SNK3KdwQ/CiXjvqZ8jk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andre Przywara , Chen-Yu Tsai , Maxime Ripard , Sasha Levin Subject: [PATCH 5.11 050/775] arm64: dts: allwinner: A64: Limit MMC2 bus frequency to 150 MHz Date: Mon, 1 Mar 2021 17:03:38 +0100 Message-Id: <20210301161204.192943165@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161201.679371205@linuxfoundation.org> References: <20210301161201.679371205@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Andre Przywara [ Upstream commit 948c657cc45e8ce48cb533d4e2106145fa765759 ] In contrast to the H6 (and later) manuals, the A64 datasheet does not specify any limitations in the maximum possible frequency for eMMC controllers. However experimentation has found that a 150 MHz limit similar to other SoCs and also the MMC0 and MMC1 controllers on the A64 seems to exist for the MMC2 controller. Limit the frequency for the MMC2 controller to 150 MHz in the SoC .dtsi. The Pinebook seems to be the an odd exception, since it apparently seems to work with 200 MHz as well, so overwrite this in its board .dts file. Tested on a Pine64-LTS: 200 MHz HS-200 fails, 150 MHz HS-200 works. Fixes: 22be992faea7 ("arm64: allwinner: a64: Increase the MMC max frequency") Signed-off-by: Andre Przywara Acked-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20210113152630.28810-7-andre.przywara@arm.com Signed-off-by: Sasha Levin --- arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts | 1 + arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts index d07cf05549c32..7ae16541d14f5 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts @@ -167,6 +167,7 @@ pinctrl-0 = <&mmc2_pins>, <&mmc2_ds_pin>; vmmc-supply = <®_dcdc1>; vqmmc-supply = <®_eldo1>; + max-frequency = <200000000>; bus-width = <8>; non-removable; cap-mmc-hw-reset; diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi index 19e9b8ca8432f..57786fc120c30 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi @@ -514,7 +514,7 @@ resets = <&ccu RST_BUS_MMC2>; reset-names = "ahb"; interrupts = ; - max-frequency = <200000000>; + max-frequency = <150000000>; status = "disabled"; #address-cells = <1>; #size-cells = <0>;