linux-kernel - Re: Warnings for invalid VDD (sdhci-s3c)

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Message-ID: <20160324155840.50474b98@xhacker>
Date:	Thu, 24 Mar 2016 15:58:40 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	<ludovic.desroches@...el.com>
CC:	"Ivan T. Ivanov" <ivan.ivanov@...aro.org>,
	<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-samsung-soc@...r.kernel.org>,
	"Jaehoon Chung" <jh80.chung@...sung.com>
Subject: Re: Warnings for invalid VDD (sdhci-s3c)

Hi,

On Thu, 24 Mar 2016 16:28:56 +0900 Krzysztof Kozlowski wrote:

> Hi,
> 
> After 918f4cbd4340 ("mmc: sdhci: restore behavior when setting VDD via
> external regulator") On Trats2 board I see warnings for invalid VDD
> value (2.8V):
> 
> [    3.119656] ------------[ cut here ]------------
> [    3.119666] WARNING: CPU: 3 PID: 90 at
> ../drivers/mmc/host/sdhci.c:1234 sdhci_do_set_ios+0x4cc/0x5e0
> [    3.119669] mmc0: Invalid vdd 0x10

Per my understanding, the wrong vdd indicates a wrong ocr, what's the voltage of
this host's vmmc regulator?

Thanks,
Jisheng