On 23.11.2009 15:33, Carl-Daniel Hailfinger wrote:
On 19.11.2009 17:51, Carl-Daniel Hailfinger wrote:
To summarize: Write granularity is chip specific. The following write granularities exist according to my datasheet survey: - 1 bit. Each bit can be cleared individually. - 1 byte. A byte can be written once. Further writes to an already written byte cause the contents to be either undefined or to stay unchanged. - 128 bytes. If less than 128 bytes are written, the rest will be erased. Each write to a 128-byte region will trigger an automatic erase before anything is written. Very uncommon behaviour. - 256 bytes. If less than 256 bytes are written, the contents of the unwritten bytes are undefined.
New patch. Handle 1-bit, 1-byte and 256-byte write granularity.
Stefan: I believe this addresses your concerns.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Ping? This is http://patchwork.coreboot.org/patch/582/ in case you want to look at the patch again. Regards, Carl-Daniel -- Developer quote of the month: "We are juggling too many chainsaws and flaming arrows and tigers."