[U-Boot] [PATCH 4/6] mmc: Continue polling MMC card for OCR only if it is still not ready

[Andrew Gabbasov]

Hi Troy,

> From: Troy Kisky [mailto:troy.kisky at boundarydevices.com]
> Sent: Friday, March 20, 2015 9:39 PM
> To: Peng.Fan at freescale.com; Gabbasov, Andrew; u-boot at lists.denx.de
> Cc: Eric Nelson
> Subject: Re: [U-Boot] [PATCH 4/6] mmc: Continue polling MMC card for OCR
> only if it is still not ready
> 
> [skipped]
> 
> Here's another patch that solves the problem a little earlier. It has this
> disadvantage of being slightly bigger, though it makes the code look
better.
> 
> https://github.com/boundarydevices/u-boot-imx6/commit/c0260ca
> 

I have a couple of doubts regarding that patch.

First, my personal taste objects to such duplicating of the code
(I mean setting of version, ocr, rca, etc fields of mmc structure).
If we'll have to change or add anything to these settings, we'll have to
make
the same change in 2 different place, which is error-prone and extremely
inconvenient from maintenance point of view.

Second, what about SPI mode? Doesn't this patch skip retrieving of OCR
register
with a special command for SPI host case (thus setting ocr field
incorrectly),
if the card comes to ready state with the first attempt?

Thanks.

Best regards,
Andrew