staging: comedi: hwdrv_apci1500: introduce z8536_write()

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The Z8536 CIO registers are indirectly written by writing the register offset
to the control register then writing the value to the control register.

Introduce a helper function to write the Z8536 CIO registers.

The registers are written from "normal" code and in the interrupt handler,
spinlock the sequence to protect the indirect register access.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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H Hartley Sweeten 2014-12-03 11:25:33 -07:00 committed by Greg Kroah-Hartman

parent 54c3ef4657

commit 8dbaadb931

1 changed files with 253 additions and 812 deletions

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drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.c

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