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regmap-irq: Add driver callback to configure virtual regs 

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 <gurus@codeaurora.org>
Link: https://lore.kernel.org/r/07e058cdec2297d15c95c825aa0263064d962d5a.1616613838.git.gurus@codeaurora.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Guru Das Srinagesh 2021-03-24 12:28:54 -07:00 committed by Mark Brown
parent 4c50144563
commit 394409aafd
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2 changed files with 9 additions and 0 deletions
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5
drivers/base/regmap/regmap-irq.c
View File

@ -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;
}

4
include/linux/regmap.h
View File

@ -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;
};