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regmap: irq: add chip option mask_writeonly

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Some irq controllers have writeonly/multipurpose register layouts. In
those cases we read invalid data back. Here we add the option
mask_writeonly as masking option.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Michael Grzeschik
2017-06-23 14:35:09 +02:00
committed by Mark Brown
parent 63c73b059c
commit a71411dbf6
2 changed files with 27 additions and 15 deletions
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2
include/linux/regmap.h
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@@ -884,6 +884,7 @@ struct regmap_irq {
*
* @status_base: Base status register address.
* @mask_base: Base mask register address.
* @mask_writeonly: Base mask register is write only.
* @unmask_base: Base unmask register address. for chips who have
* separate mask and unmask registers
* @ack_base: Base ack address. If zero then the chip is clear on read.
@@ -927,6 +928,7 @@ struct regmap_irq_chip {
unsigned int wake_base;
unsigned int type_base;
unsigned int irq_reg_stride;
bool mask_writeonly:1;
bool init_ack_masked:1;
bool mask_invert:1;
bool use_ack:1;