mmc: sdhci-of-at91: Internal clock never stabilised

[Ludovic Desroches]

Hi Alex,

Which revision of SoC are you using?

Regards

Ludovic

On Sun, Jan 08, 2017 at 01:53:44PM +0100, Alexandre Belloni wrote:
> Hi,
> 
> I think Cyrille worked on that a few month ago, maybe he has a comment.
> 
> On 08/01/2017 at 14:07:53 +0200, Alex Gershgorin wrote :
> > Hi All,
> > We have two different HW platforms based on SAMA5D2 SoC (SAMA5D2 Xplained
> > Board and our own HW).
> > On both of them we are facing stabilization of the internal
> > clock problem, it does not happen all the time but quite often.
> > Please see below my Kernel boot messages:
> > 
> > sdhci: Copyright(c) Pierre Ossman
> > sdhci-pltfm: SDHCI platform and OF driver helper
> > sdhci-at91 a0000000.sdio-host: update clk mul to 39 as gck rate is
> > 480000000 Hz
> > mmc0: Internal clock never stabilised.
> > mmc0: Internal clock never stabilised.
> > mmc0: SDHCI controller on a0000000.sdio-host [a0000000.sdio-host] using ADMA
> > 
> > snip
> > 
> > snip
> > 
> > Waiting for root device /dev/mmcblk0p2...
> > mmc0: Internal clock never stabilised.
> > mmc0: Timeout waiting for hardware cmd interrupt.
> > sdhci: =========== REGISTER DUMP (mmc0)===========
> > sdhci: Sys addr: 0x00000000 | Version:  0x00001502
> > sdhci: Blk size: 0x00000000 | Blk cnt:  0x00000000
> > sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
> > sdhci: Present: 0x01ff0001 | Host ctl: 0x00000001
> > sdhci: Power: 0x0000000f | Blk gap:  0x00000000
> > sdhci: Wake-up: 0x00000000 | Clock:    0x0000ffe1
> > sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
> > sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003
> > sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
> > sdhci: Caps: 0x27ec0c8c | Caps_1: 0x00270f77
> > sdhci: Cmd: 0x00000000 | Max curr: 0x00000000
> > sdhci: Host ctl2: 0x00000000
> > sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
> > sdhci: ===========================================
> > 
> > Any direction to solve this problem?
> > 
> > Thanks,
> > Alex Gershgorin
> 
> -- 
> Alexandre Belloni, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com
> 
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