regmap: add support for non contiguous status to regmap-irq

In some chips the IRQ status registers are not contiguous in the register
map but spaced at even spaces. This is an easy case to handle with minor
changes. It is assume for this purpose that the stride for status is
equal to the stride for mask/ack registers as well.

Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 720866887ae3..56af22ec9aba 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -219,6 +219,7 @@ struct regmap_irq {
  * @status_base: Base status register address.
  * @mask_base:   Base mask register address.
  * @ack_base:    Base ack address.  If zero then the chip is clear on read.
+ * @irq_reg_stride:  Stride to use for chips where registers are not contiguous.
  *
  * @num_regs:    Number of registers in each control bank.
  * @irqs:        Descriptors for individual IRQs.  Interrupt numbers are
@@ -231,6 +232,7 @@ struct regmap_irq_chip {
         unsigned int status_base;
         unsigned int mask_base;
         unsigned int ack_base;
+        unsigned int irq_reg_stride;
 
         int num_regs;