From patchwork Mon Jan 16 16:57:00 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 9519161 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 900DC600C5 for ; Mon, 16 Jan 2017 17:00:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7E2D526E78 for ; Mon, 16 Jan 2017 17:00:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 71E06283BB; Mon, 16 Jan 2017 17:00:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0B05426E78 for ; Mon, 16 Jan 2017 17:00:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751583AbdAPRAE (ORCPT ); Mon, 16 Jan 2017 12:00:04 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:58808 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751356AbdAPQ5K (ORCPT ); Mon, 16 Jan 2017 11:57:10 -0500 Received: by mail.free-electrons.com (Postfix, from userid 110) id 0A20420BC2; Mon, 16 Jan 2017 17:57:12 +0100 (CET) Received: from localhost (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id D535920708; Mon, 16 Jan 2017 17:57:11 +0100 (CET) From: Maxime Ripard To: Chen-Yu Tsai , Maxime Ripard , Ulf Hansson Cc: Rob Herring , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, Andre Przywara Subject: [PATCH v3 10/13] arm64: allwinner: a64: Increase the MMC max frequency Date: Mon, 16 Jan 2017 17:57:00 +0100 Message-Id: <331b186d5caebe91c236e2ef6b8daf3117621d6d.1484585798.git-series.maxime.ripard@free-electrons.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The eMMC controller seem to have a maximum frequency of 200MHz, while the regular MMC controllers are capped at 150MHz. Since older SoCs cannot go that high, we cannot change the default maximum frequency, but fortunately for us we have a property for that in the DT. This also has the side effect of allowing to use the MMC HS200 and SD SDR104 modes for the boards that support it (with either 1.2v or 1.8v IOs). Signed-off-by: Maxime Ripard arm64: allwinner: a64: Limit MMC0 and MMC1 rates to 150MHz Trying to set the bus to 200MHz on MMC1 when doing SDIO is failing. Allwinner sets the maximum for this bus to 150MHz, so enforce that limit. This hasn't been tested with MMC0, but the documented limit is the same, and I expect the behaviour to be the same. Signed-off-by: Maxime Ripard --- arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 3 +++ 1 file changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi index 8e149498e096..b371fccc234b 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi @@ -332,6 +332,7 @@ resets = <&ccu RST_BUS_MMC0>; reset-names = "ahb"; interrupts = ; + max-frequency = <150000000>; status = "disabled"; #address-cells = <1>; #size-cells = <0>; @@ -345,6 +346,7 @@ resets = <&ccu RST_BUS_MMC1>; reset-names = "ahb"; interrupts = ; + max-frequency = <150000000>; status = "disabled"; #address-cells = <1>; #size-cells = <0>; @@ -358,6 +360,7 @@ resets = <&ccu RST_BUS_MMC2>; reset-names = "ahb"; interrupts = ; + max-frequency = <200000000>; status = "disabled"; #address-cells = <1>; #size-cells = <0>;