From: Graham Moore <grmo...@altera.com> This is a slightly different version of the patch that Insop Song submitted (http://marc.info/?i=201403012022.10111.marex%20()%20denx%20!%20de).
I talked to Insop, and he agreed I should submit this patch as a follow-on to his. This patch uses a flag in the m25p_ids[] array to determine which chips need to use the FSR (Flag Status Register). Rationale for using the FSR: The Micron data sheets say we have to do this, at least for the multi-die 512M and 1G parts (n25q512 and n25q00). In practice, if we don't check the FSR for program/erase status, and we rely solely on the status register (SR), then we get corrupted data in the flash. Micron told us (Altera) that for multi-die chips based on the 65nm 256MB die, we need to check the SR first, then check the FSR, which is why the wait_for_fsr_ready function does that. Future chips based on 45 nm 512MB die will use the FSR only. Thanks. Graham Moore (1): Add support for flag status register on Micron chips. drivers/mtd/devices/m25p80.c | 94 +++++++++++++++++++++++++++++++++++------- 1 file changed, 80 insertions(+), 14 deletions(-) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/