On Sat, Oct 24, 2015 at 01:26:54PM -0200, Fabio Estevam wrote:
From: Fabio Estevam fabio.estevam@freescale.com
Many SPI flashes have protection bits (BP2, BP1 and BP0) in the status register that can protect selected regions of the SPI NOR.
Take these bits into account when performing erase operations, making sure that the protected areas are skipped.
Tested on a mx6qsabresd:
=> sf probe SF: Detected M25P32 with page size 256 Bytes, erase size 64 KiB, total 4 MiB => sf protect lock 0x3f0000 0x10000 => sf erase 0x3f0000 0x10000 offset 0x3f0000 is protected and cannot be erased SF: 65536 bytes @ 0x3f0000 Erased: ERROR => sf protect unlock 0x3f0000 0x10000 => sf erase 0x3f0000 0x10000 SF: 65536 bytes @ 0x3f0000 Erased: OK
Signed-off-by: Fabio Estevam fabio.estevam@freescale.com
Reviewed-by: Tom Rini trini@konsulko.com