Commit 534c702c authored by Markus Heidelberg's avatar Markus Heidelberg Committed by Greg Kroah-Hartman
Browse files

dt-bindings: eeprom: at25: use "size" for FRAMs without device ID 

Not all FRAM chips have a device ID and implement the corresponding read
command. Thus the memory size, which is contained in the device ID,
cannot be detected and has to be set manually as it is done for EEPROMs.

Link: https://lore.kernel.org/all/20250401133148.38330-1-m.heidelberg@cab.de/


Signed-off-by: default avatarMarkus Heidelberg <m.heidelberg@cab.de>
Reviewed-by: default avatarRob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250815095839.4219-2-m.heidelberg@cab.de


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b009c1db

Documentation/devicetree/bindings/eeprom/at25.yaml

+8 −0
Original line number Diff line number Diff line
@@ -56,6 +56,7 @@ properties: 
    $ref: /schemas/types.yaml#/definitions/uint32

    description:

      Total eeprom size in bytes.

      Also used for FRAMs without device ID where the size cannot be detected.



  address-width:

    $ref: /schemas/types.yaml#/definitions/uint32
@@ -146,4 +147,11 @@ examples: 
            reg = <1>;

            spi-max-frequency = <40000000>;

        };



        fram@2 {

            compatible = "cypress,fm25", "atmel,at25";

            reg = <2>;

            spi-max-frequency = <20000000>;

            size = <2048>;

        };

    };