Enable drivers to configure and modify "virtual" registers, which are
non-standard registers that further configure irq type on some devices.
Since they are non-standard, enable drivers to configure them according
to their particular idiosyncrasies by specifying an optional callback
function while registering with the framework.
Signed-off-by: Guru Das Srinagesh <gu...@codeaurora.org>
---
drivers/base/regmap/regmap-irq.c | 5 +++++
include/linux/regmap.h | 4 ++++
2 files changed, 9 insertions(+)
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index d1ade76..e6343ccc 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -333,6 +333,11 @@ static int regmap_irq_set_type(struct irq_data *data,
unsigned int type)
default:
return -EINVAL;
}
+
+ if (d->chip->set_type_virt)
+ return d->chip->set_type_virt(d->virt_buf, type, data->hwirq,
+ reg);
+
return 0;
}
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 97ec733..f87a11a 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1426,6 +1426,8 @@ struct regmap_irq_sub_irq_map {
* before regmap_irq_handler process the interrupts.
* @handle_post_irq: Driver specific callback to handle interrupt from device
* after handling the interrupts in regmap_irq_handler().
+ * @set_type_virt: Driver specific callback to extend regmap_irq_set_type()
+ * and configure virt regs.
* @irq_drv_data: Driver specific IRQ data which is passed as parameter when
* driver specific pre/post interrupt handler is called.
*
@@ -1473,6 +1475,8 @@ struct regmap_irq_chip {
int (*handle_pre_irq)(void *irq_drv_data);
int (*handle_post_irq)(void *irq_drv_data);
+ int (*set_type_virt)(unsigned int **buf, unsigned int type,
+ unsigned long hwirq, int reg);
void *irq_drv_data;
};
--
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a Linux Foundation Collaborative Project
