On Thu, Oct 08, 2015 at 08:01:23PM +0200, Ulf Hansson wrote:

+Russell

On 17 September 2015 at 10:16, Ludovic Desroches
[off-list ref] wrote:

quoted

The Atmel sdhci device needs a new quirk. sdhci_set_clock set the Clock
Control Register to 0 before computing the new value and writing it.
It disables the internal clock which causes a reset mecanism. If we
write the new value before this reset mecanism is done, it will prevent
the stabilisation of the internal clock, so a delay is needed. This
delay is about 2-3 cycles of the base clock. To be safe, a 1 ms delay is
used.

Signed-off-by: Ludovic Desroches <redacted>
---
Hi Ulf,

Can you take these patches as fixes? I thought it was better to introduce a
quirk instead of duplicating a part of the sdhci_set_clock function to
implement my own set_clock function.

Hi Ludovic,

Sorry for the delay!

I have been thinking of how to address patches for sdhci that adds
more quirks/callbacks. To be honest, I am fed up with such patches as
I think it keeps the development of sdhci going in the wrong
direction.

Instead, I have been hoping for someone to have stab into turning
sdhci into a library as Russell King pointed out several times as
well.

Now, as my response too you had a big delay for these patches and
because it's a fix intended for the rc, I am going to apply patch1 and
patch2 anyway. Although, you and everybody else that contributes to
the sdhci development, please consider this as the *last* time for
adding quirks/callbacks, unless you have *very good* reasons.

Thanks Ulf, it seems it is my lucky day! I understand and share your
point of view about quirks but it was so easy to manage controller
issues with them...

Regards

Ludovic