spi: bcm2835aux: add bcm2835 auxiliary spi device driver

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The bcm2835 has 2 auxiliary spi bus masters spi1 and spi2.

This implements the driver to enable these devices.

The driver does not implement native chip-selects but uses
the aribtrary GPIO-chip-selects provided by the spi-chipselect.

Note that this driver relies on the fact that
the clock is implemented by the clk-bcm2835-aux driver,
which enables/disables the HW block when requesting/releasing
the clock.

Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Martin Sperl 2015-09-11 11:22:04 +00:00 • committed by Mark Brown

parent 541cf5de02

commit 1ea29b39f4

3 changed files with 505 additions and 0 deletions

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11

drivers/spi/Kconfig

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1

drivers/spi/Makefile

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493

drivers/spi/spi-bcm2835aux.c

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