Hi Stefan,
On 02-Mar-19 3:56 PM, Stefan Roese wrote:
Hi Chris, Hi Vignesh,
On 02.03.19 09:36, Vignesh Raghavendra wrote:
On 02-Mar-19 1:15 PM, Chris Packham wrote:
This board uses Micron N25Q256A SPI flash. Enable SPI_FLASH_BAR to allow us to access the whole chip.
Signed-off-by: Chris Packham judge.packham@gmail.com Cc: Vignesh R vigneshr@ti.com
Could add imply SPI_FLASH_BAR to KIRKWOOD_SPI instead? So that we don't have to fix every defconfig that using kirkwood_spi.c.
Did you use BAR before the newly introduced SPI NOR restructuring? If not, then I would rather oppose to using it now, since option should only be used by those platforms that used it earlier as well.
configs/db-88f6820-amc_defconfig did use SPI_FLASH_BAR before SPI NOR re-work
BAR mode is not supported by Linux and an U-Boot special.
Looks like kernel driver does support 3/4 byte addressing, but U-Boot version of the driver doesn't.
Could you please double check, if and how addressing of the whole 32MiB was done before? And perhaps its possible to enhance the SPI driver to support 3 and 4 byte addressing instead.
It would be great if driver could be modified to support 3 and 4 byte addressing modes.