diff options
| author | Joachim Eastwood <manabian@gmail.com> | 2015-05-06 20:09:09 +0200 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2015-05-28 19:59:40 +0200 |
| commit | 3386e0fa905c31bf1dafa2cbe2ecceb7e5ce2e66 (patch) | |
| tree | 7096ea89f1d2e5aa2366cf85b548d1c53284ed38 | |
| parent | of: Grammar s/property exist/property exists/ (diff) | |
| download | linux-3386e0fa905c31bf1dafa2cbe2ecceb7e5ce2e66.tar.xz linux-3386e0fa905c31bf1dafa2cbe2ecceb7e5ce2e66.zip | |
of: add helper function to retrive match data
It's a common operation for device drivers to retrive the data
member from of_device_id struct in their probe function.
Most driver end up doing:
const struct of_device_id *match;
match = of_match_device(driver_of_match, &pdev->dev);
driver->data = match->data;
With the of_device_get_match_data helper function all this can
done in one go.
Signed-off-by: Joachim Eastwood <manabian@gmail.com>
[robh: add missing inline to dummmy declaration]
Signed-off-by: Rob Herring <robh@kernel.org>
| -rw-r--r-- | drivers/of/device.c | 12 | ||||
| -rw-r--r-- | include/linux/of_device.h | 7 |
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/of/device.c b/drivers/of/device.c index 20c1332a0018..8b91ea241b10 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -163,6 +163,18 @@ void of_device_unregister(struct platform_device *ofdev) } EXPORT_SYMBOL(of_device_unregister); +const void *of_device_get_match_data(const struct device *dev) +{ + const struct of_device_id *match; + + match = of_match_device(dev->driver->of_match_table, dev); + if (!match) + return NULL; + + return match->data; +} +EXPORT_SYMBOL(of_device_get_match_data); + ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len) { const char *compat; diff --git a/include/linux/of_device.h b/include/linux/of_device.h index 22801b10cef5..4c508549833a 100644 --- a/include/linux/of_device.h +++ b/include/linux/of_device.h @@ -33,6 +33,8 @@ extern int of_device_add(struct platform_device *pdev); extern int of_device_register(struct platform_device *ofdev); extern void of_device_unregister(struct platform_device *ofdev); +extern const void *of_device_get_match_data(const struct device *dev); + extern ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len); @@ -65,6 +67,11 @@ static inline int of_driver_match_device(struct device *dev, static inline void of_device_uevent(struct device *dev, struct kobj_uevent_env *env) { } +static inline const void *of_device_get_match_data(const struct device *dev) +{ + return NULL; +} + static inline int of_device_get_modalias(struct device *dev, char *str, ssize_t len) { |