[U-Boot] [PATCH v5 2/3] cfi_flash: convert to driver model

Jagan Teki
2015-12-06T15:03:25Z

On 6 December 2015 at 19:05, Thomas Chou <thomas@wytron.com.tw> wrote:
> Hi Jagan,
>
> On 2015?12?06? 21:10, Jagan Teki wrote:
>>>
>>> This probing is not specific to CFI flash. It will probe all flash
>>> variants
>>> of MTD uclass.
>>
>>
>> This is something I'm unclear, suppose if I need to use MTD uclass in
>> spi-flash drivers shall I enable CONFIG_CFI_FLASH? If so that depends
>> on CONFIG_CFI_FLASH_DRIVER as well right? then it is not correct to
>> enable CFI_FLASH_DRIVER for other flash variants like spi-flash right?
>
>
> There is no need to select CFI_FLASH if there is no CFI flash. The probing
> here is only because we want to display the size of parallel flash in
> initr_flash() of board_r.c.

So, this is the way drivers/mtd/altera_qspi.c getting probed?

>
> Normally, devices are probed when they are used. You should be able to use
> "sf probe" for MTD uclass in the same way you do for SPI_FLASH uclass.

True, suppose if I wanted to probe spi-flash MTD uclass drivers w/o
using "commands" like sf probe then I need to implement dm_scan node
logic on mtd-uclass.c correct?

thanks!
--
Jagan.

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