spi: pl022: Add support for chip select extension

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Add support for a extended PL022 which has an extra register for controlling up
to five chip select signals. This controller is found on the AXM5516 SoC.
Unfortunately the PrimeCell identification registers are identical to a
standard ARM PL022. To work around this, the peripheral ID must be overridden
in the device tree using the "arm,primecell-periphid" property with the value
0x000b6022.

Signed-off-by: Anders Berg <anders.berg@avagotech.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Anders Berg 2014-09-17 08:46:58 +02:00 • committed by Mark Brown

parent 73e3f1eb51

commit db4fa45ed3

2 changed files with 63 additions and 1 deletions

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include/linux/amba/bus.h

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