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

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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>
This commit is contained in:
Graeme Gregory 2012-05-14 22:40:43 +09:00 • committed by Mark Brown
parent 4af8be67fd
commit 022f926a24
2 changed files with 23 additions and 33 deletions
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2
include/linux/regmap.h
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@ -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;