regmap: add a new macro:REGMAP_IRQ_REG_LINE(_id, _reg_bits)

if there are lots of irqs for a device and the register addresses for these
irqs is continuous, we can use this macro to initialize regmap_irq value.

Signed-off-by: Tony Xie <tony.xie@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index a367d59c301d..3930f3331652 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1110,6 +1110,12 @@ struct regmap_irq {
 #define REGMAP_IRQ_REG(_irq, _off, _mask)               \
         [_irq] = { .reg_offset = (_off), .mask = (_mask) }
 
+#define REGMAP_IRQ_REG_LINE(_id, _reg_bits) \
+        [_id] = {                               \
+                .mask = BIT((_id) % (_reg_bits)),       \
+                .reg_offset = (_id) / (_reg_bits),      \
+        }
+
 /**
  * struct regmap_irq_chip - Description of a generic regmap irq_chip.
  *