Re: [PATCH v2] mmc: lower init clock frequency to 300kHz

2010-01-06 Thread Hein_Tibosch
On 6-1-2010 15:01, Pavel Machek wrote: > Machine with minimum clock of 1MHz is clearly broken, yet you issue > "soft" warning. > > What about: > > if (f_min > 400k) > print existing warning > else if (f_min > 300k) > print warning 'if your card does not work, its broken, bu

Re: [PATCH v2] mmc: lower init clock frequency to 300kHz

2010-01-05 Thread Pavel Machek
On Sat 2010-01-02 10:11:10, Ben Nizette wrote: > > A good few months ago, commit > > commit 8dfd0374be84793360db7fff2e635d2cd3bbcb21 > Author: Sascha Hauer > Date: Thu Apr 9 08:32:02 2009 +0200 > > MMC core: limit minimum initialization frequency to 400kHz > > broke a few setups with car

Re: [PATCH v2] mmc: lower init clock frequency to 300kHz

2010-01-02 Thread Pierre Ossman
On Sat, 2 Jan 2010 20:07:01 +1100 Ben Nizette wrote: > > Pierre, thoughts? All my cards were borderline spec but Hein's got a > mainstream, common card which seems to completely ignore the spec. Can we > just take the few-hundred-uS hit and allow initialization down at the bottom > end, say

Re: [PATCH v2] mmc: lower init clock frequency to 300kHz

2010-01-02 Thread Ben Nizette
(Adding linux CCs) On 02/01/2010, at 7:19 PM, Hein_Tibosch wrote: > Almost good: on my Kingston Elite Pro (50x) SD-card, initialization will > only succeed if F <= 282258 Hz. ... > > I checked some datasheets of several makes: > > Delkin microSD min 0 max 400 > Swissbit min 0 max 400 > Sandi

[PATCH v2] mmc: lower init clock frequency to 300kHz

2010-01-01 Thread Ben Nizette
A good few months ago, commit commit 8dfd0374be84793360db7fff2e635d2cd3bbcb21 Author: Sascha Hauer Date: Thu Apr 9 08:32:02 2009 +0200 MMC core: limit minimum initialization frequency to 400kHz broke a few setups with cards which don't quite adhere to the MMC spec - 400kHz is just too f