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From: <ed.tsai@mediatek.com>
To: Matthias Brugger <matthias.bgg@gmail.com>,
	AngeloGioacchino Del Regno
	<angelogioacchino.delregno@collabora.com>
Cc: <linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>
Subject: [PATCH 0/2] ufs: add delay for VCC ramp-up stability
Date: Thu, 5 Mar 2026 16:29:13 +0800	[thread overview]
Message-ID: <20260305083610.2672344-1-ed.tsai@mediatek.com> (raw)

Hi,

This patch series resolves a link stability issue found on our certain
platforms where the VCC regulator has a slow ramp-up time.

To fix this, a delay is needed after VCC is turned on. The solution is
implemented in two parts:

1. Introduced the new host quriks, UFSHCD_QUIRK_VCC_ON_DELAY.
2. Applied in our new platform with UFS5 device to enusre the VCC is
   ready before we enable the clocks.


             reply	other threads:[~2026-03-05  8:36 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-05  8:29 ed.tsai [this message]
2026-03-05  8:29 ` [PATCH 1/2] ufs: core: Add quriks for VCC ramp-up delay ed.tsai
2026-03-05 12:24   ` Bart Van Assche
2026-03-06  0:19     ` Ed Tsai (蔡宗軒)
2026-03-06  2:15       ` Bart Van Assche
2026-03-06  2:16   ` Bart Van Assche
2026-03-05  8:29 ` [PATCH 2/2] ufs: host: mediatek: Add VCC on delay for stability ed.tsai
2026-03-05 12:20   ` Bart Van Assche

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