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Feature #546

open

Add support for SFDP for probing to differentiate between flash chips with same ID but different capabilities

Added by Anastasia Klimchuk 5 months ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
Start date:
07/02/2024
Due date:
% Done:

0%

Estimated time:
Affected versions:
Needs backport to:
Affected hardware:
Affected OS:

Description

Newer chips support SFDP (Serial Flash Discoverable Parameter), a
specification that allows (at least) SPI flash chips to self-document
themselves to software, and that nearly all flash chips from the last
decade or so support.

One can
even use whether the probed flash chip supports SFDP to rule out
entries (a flash chip that does not respond to SFDP should not be used
with a chip definition of a SFDP-capable chip).

https://mail.coreboot.org/hyperkitty/list/flashrom@flashrom.org/thread/UCCMBKV5O4JXX4XD5DLFFH5BKEUUXWX2/

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