[PATCH v2 12/13] of: add barebox-serial driver

[Oleksij Rempel]

On Tue, Aug 11, 2020 at 10:34:01AM +0200, Sascha Hauer wrote:
> On Wed, Aug 05, 2020 at 12:16:27PM +0200, Oleksij Rempel wrote:
> > Provide a driver which should act as nvmem consumer
> > for board serial number information.
> > 
> > To make use of this driver, DTS should contain a serial
> > node with compatibe "barebox,serial" and nvmem-cell-names
> > "serial-number":
> > 
> > ...
> > 	chosen {
> > 		serial {
> > 			compatible = "barebox,serial";
> > 			nvmem-cell-names = "serial-number";
> > 			nvmem-cells = &some_provider;
> > 		};
> > 	};
> 
> This driver only works when the EEPROM or whatever provides the NVMEM
> contains the serial number in exactly the same format as shall be added
> to the /serial-number property. This seems to be a special case only and
> doesn't seem to justify a generic driver.

As with usual devicetree based solution we can add additional
compatibles to better describe a variant or quirk which should be used
to convert raw data to the serial number in usable for environment and
device tree way. I hope, by having generic drivers other users will alight
with it by making new products or extend existing driver by mainlining
existing products.

Regards,
Oleksij
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