[RFC PATCH 1/3] eeprom: Add a simple EEPROM framework

Maxime Ripard
2015-02-26T13:21:07Z

On Thu, Feb 26, 2015 at 09:16:27AM +0000, Srinivas Kandagatla wrote:
> I think we are making simple eeprom framework too smart which will
> break in future.
>
> IMHO, Anything on top of eeprom interface that interprets the data should
> not go into the eeprom framework itself, it can either live some parsers/SOC
> specific drivers/interfaces.

True, but that doesn't mean that this parser support can't be built
within the framework itself.

> As Stephen pointed out earlier lets start with something like this, which
> would provide a better abstraction to the discussed use cases like
> serial-number and packed data in eeprom.
>
> qfprom at 1000000 {
> reg = <0x1000000 0x1000>;
> ranges = <0 0x1000000 0x1000>;
> compatible = "qcom,qfprom-msm8960"
>
> pvs-data: pvs-data at 40 {
> compatible = "qcom,pvs-a";
> reg = <0x40 0x20>,
> };
>
> tsens-data: tmdata at 10 {
> reg = <0x10 40>;
> };
>
> serial-number: serial at 50 {
> compatible = "qcom,serial-msm8960";
> reg = <0x50 4>, <0x60 4>;
> };
>
> };

And I'm sorry, but I still don't get why the compatibles are needed
here.

> and then on the consumer side:
>
> device {
> eeproms = <&serial-number>;
> eeprom-names = "soc-rev-id";
> };
>
> driver side:
>
> eeprom_get_cell()
> eeprom_read();

Looks good otherwise.

Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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