[PATCH 3/4] mtd: spi-nor: aspeed: configure chip window on AHB bus

[Marek Vasut]

On 04/20/2017 01:56 PM, Cédric Le Goater wrote:
> The segment registers of the SMC controller provide a way to configure
> the mapping windows of the chips on the AHB bus. The settings are
> required to be correct when the controller operates in Command mode,
> which is the case for DMAs and the LPC mapping.
> 
> This tries to set the segment registers of each chip depending on the
> size of the flash device and depending on the previous segment
> settings, in order to have a contiguous window across multiple chips.
> 
> Unfortunately, the AST2500 SPI controller has a bug and it is not
> possible to configure a full 128MB window for a chip of the same
> size. The window size needs to be restricted to 120MB. This issue only
> applies to CE0.
> 
> Signed-off-by: Cédric Le Goater <clg at kaod.org>

Reviewed-by: Marek Vasut <marek.vasut at gmail.com>

-- 
Best regards,
Marek Vasut