From: Markus Heidelberg Date: Fri, 15 Aug 2025 09:58:36 +0000 (+0200) Subject: dt-bindings: eeprom: at25: use "size" for FRAMs without device ID X-Git-Tag: v6.18-rc1~74^2~44 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=534c702c3c234665ca2fe426a9fbb12281e55d55;p=thirdparty%2Fkernel%2Flinux.git 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: Markus Heidelberg Reviewed-by: Rob Herring (Arm) Link: https://lore.kernel.org/r/20250815095839.4219-2-m.heidelberg@cab.de Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/devicetree/bindings/eeprom/at25.yaml b/Documentation/devicetree/bindings/eeprom/at25.yaml index c31e5e7195250..00e0f07b44f84 100644 --- a/Documentation/devicetree/bindings/eeprom/at25.yaml +++ b/Documentation/devicetree/bindings/eeprom/at25.yaml @@ -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>; + }; };