tree aaa3c18ef2f5c903fa534da2069ed281f0c079b0
parent 5863e9561297e71bd6b862b7c6a1372d8bbda91c
author Bin Meng <bmeng.cn@gmail.com> 1508376057 -0700
committer Bin Meng <bmeng.cn@gmail.com> 1509088427 +0800

spi: ich: Lock down controller settings if required

Some Intel FSP (like Braswell) does SPI lock-down during the call
to fsp_notify(INIT_PHASE_BOOT). But before SPI lock-down is done,
it's bootloader's responsibility to configure the SPI controller's
opcode registers properly otherwise SPI controller driver doesn't
know how to communicate with the SPI flash device.

Rather than passively doing the opcode configuration, let's add a
simple DTS property "intel,spi-lock-down" and let the driver call
the opcode configuration function if required by such FSP.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>