Re: [RFC] Creating an eeprom class

Greg KH
2013-01-20T22:39:14Z

On Sun, Jan 20, 2013 at 07:08:28PM +0100, Thomas De Schampheleire wrote:
> [plaintext and fixed address of David Brownell]

David passed away a year or so ago, so that's really not going to help :(

> Hi,
>
> Several of the eeprom drivers that live in drivers/misc/eeprom export
> a binary sysfs file 'eeprom'. If a userspace program or script wants
> to access this file, it needs to know the full path, for example:
>
> /sys/bus/spi/devices/spi32766.0/eeprom
>
> The problem with this approach is that it requires knowledge about the
> hardware configuration: is the eeprom on the SPI bus, the I2C bus, or
> maybe memory mapped?
>
> It would therefore be more interesting to have a bus-agnostic way to
> access this eeprom file, for example:
> /sys/class/eeprom/eeprom0/eeprom
>
> Maybe it'd be even better to use a more generic class name than
> 'eeprom', since there are several types of eeprom-like devices that
> you could export this way.

Does all of the existing "eeprom" devices use the same userspace
interface? If so, yes, having a "class" would make sense.

> Or should we rather hook the eeprom code into the mtd subsystem?

Why mtd?

thanks,

greg k-h