On 07/04/2018 09:34 AM, Emmanuel Vadot wrote:
On Wed, 4 Jul 2018 09:25:16 +0200 Alexander Graf agraf@suse.de wrote:
On 07/04/2018 09:08 AM, Emmanuel Vadot wrote:
When running with special configuration (OF_BOARD and mmc overlay) RPI have the SD card as id 1. This make device enumeration fails when using the API.
Signed-off-by: Emmanuel Vadot manu@freebsd.org
Could you please elaborate a bit? From the commit message I don't fully understand which problem you're trying to solve.
Thanks,
Alex
Sure,
When using the dtb from the rpi fundation and the mmc overlay (which switch back the sd card to use the SDHCI controller and not the SDHOST one) and using OF_BOARD so u-boot uses it/pass it to the OS the device id for the sd is 1 : U-Boot> mmc list mmc@7e300000: 1
This cause the API (see api/api_storage.c) code to never expose this device to the consumer as the default value for CONFIG_SYS_MMC_MAX_DEVICE is 1.
Ouch, that whole file assumes that you know the number of devices present in your system. That's terrible.
I think the real fix would be to convert api_storage.c to instead use dm native routines to loop through all available devices and not explicitly depend on any maximum number of possible devices.
Simon, do you potentially have a patch lying around for that in a branch already?
Alex