[U-Boot] [PATCH] mmc: add wrappers for MMC block_{read, write, erase}

[Steve Rae <srae@broadcom.com>]

On 14-05-30 10:07 AM, Stephen Warren wrote:
> On 05/30/2014 10:56 AM, Steve Rae wrote:
>> On 14-05-30 08:58 AM, Stephen Warren wrote:
> ...
>>> What code are you
>>> looking at that handles multiple devices sequentially under program
>>> control rather than user command control?
>>
>> Cannot go into too much detail here (yet) -- but imagine the situation
>> where:
>> - lookup the GPT partition name (in User, Boot1, Boot2)
>> - do a block_write to the desired location...
>
> So this is all to support some non-upstream code that you can't discuss?
> That doesn't sound good...
>
>> So after discussing with a colleague, we would propose the following.
>> Does this implement what you were proposing?:
>>
>>
>> Usage (example):
>>
>> mmc->part_num_next_block_op = 1;          /* specify Boot1 partition */
>> mmc->block_dev.block_read(0, 0, 1, buf);  /* read first block from Boot1
>> partition */
>> mmc->part_num_next_block_op = 0;          /* specify User partition */
>> mmc->block_dev.block_read(0, 0, 1, buf);  /* read first block from User
>> partition */
>
> No. I would propose:
>
> get_device("mmc", "0.1", &bdev_boot1);
> bdev_boot1->block_read(...);
> get_device("mmc", "0.0", &bdev_user);
> bdev_user->block_read(...);
>
> That way, nothing needs to change in block_dev_desc_t, get_device(), etc.
>
OK -- I can make this work...
Therefore, abandoning this change.
Many Thanks, Steve