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driver-core: platform: Add platform_irq_count() 

A recent patch added calls to of_irq_count() in the qcom pinctrl
drivers and that caused module build failures because
of_irq_count() is not an exported symbol. We shouldn't export
of_irq_count() to modules because it's an internal OF API that
shouldn't be used by drivers. Platform drivers should use
platform device APIs instead. Therefore, add a platform_irq_count()
API that mirrors the of_irq_count() API so that platform drivers
can stay DT agnostic.

Cc: Andy Gross <andy.gross@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
steinar/wifi_calib_4_9_kernel
Stephen Boyd 2016-01-06 17:12:47 -08:00 committed by Linus Walleij
parent c9f294ff65
commit 4b83555d50
2 changed files with 21 additions and 0 deletions
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20
drivers/base/platform.c
View File

@ -116,6 +116,26 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
}
EXPORT_SYMBOL_GPL(platform_get_irq);
/**
* platform_irq_count - Count the number of IRQs a platform device uses
* @dev: platform device
*
* Return: Number of IRQs a platform device uses or EPROBE_DEFER
*/
int platform_irq_count(struct platform_device *dev)
{
int ret, nr = 0;
while ((ret = platform_get_irq(dev, nr)) >= 0)
nr++;
if (ret == -EPROBE_DEFER)
return ret;
return nr;
}
EXPORT_SYMBOL_GPL(platform_irq_count);
/**
* platform_get_resource_byname - get a resource for a device by name
* @dev: platform device

1
include/linux/platform_device.h
View File

@ -51,6 +51,7 @@ extern void arch_setup_pdev_archdata(struct platform_device *);
extern struct resource *platform_get_resource(struct platform_device *,
unsigned int, unsigned int);
extern int platform_get_irq(struct platform_device *, unsigned int);
extern int platform_irq_count(struct platform_device *);
extern struct resource *platform_get_resource_byname(struct platform_device *,
unsigned int,
const char *);