From: Chen-Yu Tsai <wens@kernel.org>
To: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Samuel Holland <samuel@sholland.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ARM: dts: sun8i: r40: bananapi-m2-ultra: Limit eMMC clock to 37.5 MHz
Date: Sun, 15 Nov 2026 19:35:16 +0800 [thread overview]
Message-ID: <179474251652.3095306.12076464290738502589.b4-ty@kernel.org> (raw)
In-Reply-To: <20261104185148.883318-1-jernej.skrabec@gmail.com>
On Wed, 04 Nov 2026 19:51:48 +0100, Jernej Skrabec wrote:
> The Samsung eMMC on Banana Pi M2 Ultra fails with "data error, sending
> stop command" within a second of sustained reads in DDR52 mode at
> 50 MHz. At 37.5 MHz the same board survives a long read/write soak.
>
> Limit the eMMC clock to 37.5 MHz. Also enable the hardware reset line,
> which is routed to the controller (PC24), so the card can be recovered
> after such errors.
>
> [...]
Applied to sunxi/dt-for-7.5 in sunxi, thanks!
[1/1] ARM: dts: sun8i: r40: bananapi-m2-ultra: Limit eMMC clock to 37.5 MHz
https://git.kernel.org/sunxi/linux/c/160738a3721c
Best regards,
--
Chen-Yu Tsai <wens@kernel.org>
prev parent reply other threads:[~2026-11-15 11:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-04 18:51 Jernej Skrabec
2026-11-15 11:35 ` Chen-Yu Tsai [this message]
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