drivers: spi: allow limiting reads
authorÁlvaro Fernández Rojas <noltari@gmail.com>
Tue, 23 Jan 2018 16:14:56 +0000 (17:14 +0100)
committerJagan Teki <jagan@amarulasolutions.com>
Wed, 24 Jan 2018 06:33:43 +0000 (12:03 +0530)
commit8af74edc30bb60a90a5c4d2769ff3129b187796e
treef946f505c9b5ec34b4543951124cb3d4d2ca2678
parent48263504c8d501678acaa90c075f3f7cda17c316
drivers: spi: allow limiting reads

For some SPI controllers it's not possible to keep the CS active between
transfers and they are limited to a known number of bytes.
This splits spi_flash reads into different iterations in order to respect
the SPI controller limits.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
drivers/mtd/spi/spi_flash.c
include/spi.h