linux-kernel - Re: [PATCH v2 2/2] arm64: dts: mt7986: fix emmc hs400 mode without uboot initialization

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Message-ID: <23f32b2a-a1fc-da13-e36d-c385abaa9d78@collabora.com>
Date:   Tue, 3 Oct 2023 10:36:12 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Frank Wunderlich <linux@...web.de>,
        linux-mediatek@...ts.infradead.org
Cc:     Frank Wunderlich <frank-w@...lic-files.de>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Wenbin Mei <wenbin.mei@...iatek.com>,
        Sam Shih <sam.shih@...iatek.com>, linux-mmc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Eric Woudstra <ericwouds@...il.com>, stable@...r.kernel.org
Subject: Re: [PATCH v2 2/2] arm64: dts: mt7986: fix emmc hs400 mode without
 uboot initialization

Il 29/06/23 20:43, Frank Wunderlich ha scritto:
> From: Eric Woudstra <ericwouds@...il.com>
> 
> Eric reports errors on emmc with hs400 mode when booting linux on bpi-r3
> without uboot [1]. Booting with uboot does not show this because clocks
> seem to be initialized by uboot.
> 
> Fix this by adding assigned-clocks and assigned-clock-parents like it's
> done in uboot [2].
> 
> [1] https://forum.banana-pi.org/t/bpi-r3-kernel-fails-setting-emmc-clock-to-416m-depends-on-u-boot/15170
> [2] https://github.com/u-boot/u-boot/blob/master/arch/arm/dts/mt7986.dtsi#L287
> 
> Cc: stable@...r.kernel.org
> Fixes: 513b49d19b34 ("arm64: dts: mt7986: add mmc related device nodes")
> Signed-off-by: Eric Woudstra <ericwouds@...il.com>
> Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>