From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tushar Behera <tushar.behera@linaro.org>
Date: Mon, 08 Apr 2013 09:22:42 +0530
Subject: [U-Boot] mmc: sdhci: Add a quirk to add delay during completion
 of sdhci_send_cmd
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References: <CAD6G_RT=19P+D1gvE5TGJHJGw3U0agw4Bi4S14vPm6R_6U9NjQ@mail.gmail.com>
Message-ID: <51623F0A.20807@linaro.org>
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On 04/07/2013 10:27 AM, Jagan Teki wrote:
> Hi,
> 
> I saw that you have been added the SDHCI_QUIRK_WAIT_SEND_CMD on below commit
> http://git.denx.de/?p=u-boot.git;a=commitdiff;h=13243f2eafc4292917178051fe1bb5aab2774dca
> 
> I need few quires regarding the QUIRK delay.
> 1. Why the delay is 1000
> +       if (host->quirks & SDHCI_QUIRK_WAIT_SEND_CMD)
> +               udelay(1000);
> +
> 2. is this delay specific to s5p_sdhci  controller?

This was specific to s5p_sdhci driver so as to replicate the behavior of
s5p_mmc driver.

> 3. I have an issue "Controller never released inhibit bit(s)"
>    but when I enable this quirk on my driver with udelay(10000), it's
> working.

I am not sure about the exact delay as per the spec. I have added
Jaehoon to CC who might have additional information about this.

> 
> Could you please help me.
> 
> Thanks,
> Jagan.
> 


-- 
Tushar Behera