On 02/14/2016 07:16 PM, Simon Glass wrote:
Recent additions of the MMC and DISK uclasses have indicated that it is time to look at adding a uclass for block devices. This series does this and includes a few clean-ups to the partition code also.
A block device is typically a child device of its storage parent. For example an MMC device will have a block-device child. A USB storage device may have multiple block-device children, one for each LUN.
With this series only USB storage and 'host' are converted over to use the new support. Several more remain, including SCSI, IDE and MMC. Each of these should get its own uclass.
The uclass implements only a few basic features. A few tests are added to check that things work as expected.
The code size impact of switching to driver model for block devices is small. One benefit is that it becomes possible to enumerate all block devices, regardless of their type.
This series looks OK, and I would give it an Acked-by, except that it seems to break DFU to SD card on the 3 systems where I'm running test/py, and even cause "dhcp" to fail on one of them (that could be either memory corruption caused by these patches, or pre-existing corruption that these patches shuffle around in memory so it only now causes a problem). I'll see if I can bisect these down to a specific patch in the series and see what's up.