linux-kernel - Re: [PATCH 2/2] mmc: dw_mmc: Give a good reset after we give power

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Message-ID: <54EE13CB.5040401@collabora.co.uk>
Date:	Wed, 25 Feb 2015 19:26:19 +0100
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Doug Anderson <dianders@...omium.org>,
	Jaehoon Chung <jh80.chung@...sung.com>,
	Seungwon Jeon <tgih.jun@...sung.com>,
	Ulf Hansson <ulf.hansson@...aro.org>
CC:	Alim Akhtar <alim.akhtar@...sung.com>,
	Sonny Rao <sonnyrao@...omium.org>,
	Andrew Bresticker <abrestic@...omium.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Addy Ke <addy.ke@...k-chips.com>,
	Alexandru Stan <amstan@...omium.org>, chris@...ntf.net,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] mmc: dw_mmc: Give a good reset after we give power

Hello Doug,

On 02/20/2015 07:57 PM, Doug Anderson wrote:
> We should give dw_mmc a good reset after we apply power.  On some
> boards vqmmc may actually be connected to the IP block in the SoC so
> it's good to reset after power comes in.
> 
> Without this we sometimes see failures enumerating cards on rk3288.
> 
> Signed-off-by: Doug Anderson <dianders@...omium.org>

On an Exynos5250 Snow, Exynos5420 Peach Pit and Exynos5800 Peach Pi:

Tested-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>

Best regards,
Javier

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