linux-kernel - Re: [PATCH 4/4] mmc: omap_hsmmc: Simplify init for twl6030 MMC card detect

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Date:	Mon, 05 Mar 2012 14:46:07 +0530
From:	Rajendra Nayak <rnayak@...com>
To:	Tony Lindgren <tony@...mide.com>
CC:	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	Samuel Ortiz <sameo@...ux.intel.com>,
	linux-mmc@...r.kernel.org, Chris Ball <cjb@...top.org>,
	linux-arm-kernel@...ts.infradead.org,
	Venkatraman S <svenkatr@...com>, Balaji T K <balajitk@...com>
Subject: Re: [PATCH 4/4] mmc: omap_hsmmc: Simplify init for twl6030 MMC card
 detect

On Friday 02 March 2012 10:52 PM, Tony Lindgren wrote:
> BTW, with -rc5, looks like re-inserting omap_hsmmc on omap4 fails
> to detect any cards, and then fails to unload. This works on omap3
> just fine. Any ideas why that would be?

Yeah, looks like thats broken. I am not sure whats going wrong though.
I just enabled CONFIG_MMC_DEBUG and saw these logs below.

Venkat/Balaji, care to look at this one?

# insmod omap_hsmmc.ko
[   43.358398] omap_hsmmc omap_hsmmc.0: context was not lost
[   43.364105] omap_hsmmc omap_hsmmc.0: enabled
[   44.434661] mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 
timing 0
[   44.442352] omap_hsmmc omap_hsmmc.0: Set clock to 0Hz
[   44.474365] omap_hsmmc omap_hsmmc.0: disabled
[   44.482208] omap_hsmmc omap_hsmmc.4: context was not lost
[   44.482208] omap_hsmmc omap_hsmmc.4: enabled
[   44.546600] omap_hsmmc omap_hsmmc.0: context was not lost
[   44.552276] omap_hsmmc omap_hsmmc.0: enabled
[   44.552276] mmc0: mmc_rescan_try_freq: trying to init card at 400000 Hz
[   44.563720] mmc0: clock 0Hz busmode 2 powermode 1 cs 0 Vdd 18 width 0 
timing 0
[   44.572174] omap_hsmmc omap_hsmmc.0: Set clock to 0Hz
[   44.613800] mmc0: clock 400000Hz busmode 2 powermode 2 cs 0 Vdd 18 
width 0 timing 0
[   44.621887] omap_hsmmc omap_hsmmc.0: Set clock to 400000Hz
[   44.735290] mmc0: starting CMD52 arg 00000c00 flags 00000195
[   44.741271] omap_hsmmc omap_hsmmc.0: mmc0: CMD52, argument 0x00000c00
[   45.560241] mmc1: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 
timing 0
[   45.567871] omap_hsmmc omap_hsmmc.4: Set clock to 0Hz
[   45.591491] omap_hsmmc omap_hsmmc.4: disabled
#
#
# rmmod omap_hsmmc
[  607.302307] omap_hsmmc omap_hsmmc.4: context was not lost
[  607.308044] omap_hsmmc omap_hsmmc.4: enabled
[  607.312591] omap_hsmmc omap_hsmmc.4: disabled
[  607.317199] omap_hsmmc omap_hsmmc.4: context was not lost
[  607.322875] omap_hsmmc omap_hsmmc.4: enabled

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