regmap: irq: Add mask invert flag for enable register

Currently, regmap will write 1 to mask_base to mask
an interrupt and write 0 to unmask it.

But some chips do not have an interrupt mask register,
and only have interrupt enable register.
Then we should write 0 to disable interrupt and 1 to enable.

So add an mask_invert flag to handle this.
If it is not set, behavior is same as previous.
If set it to 1, the mask value will be inverted
before written to mask_base

Signed-off-by: Xiaofan Tian <tianxf@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 9c4c9c673f38..e3bcc3f4dcb8 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -300,6 +300,7 @@ struct regmap_irq_chip {
         unsigned int ack_base;
         unsigned int wake_base;
         unsigned int irq_reg_stride;
+        unsigned int mask_invert;
         bool runtime_pm;
 
         int num_regs;