dev_request_resource is useful for porting kernel drivers that use devm_request_source on a resource retrieved via <linux/of_address.h>. Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> --- drivers/base/driver.c | 19 +++++++++++++++---- include/driver.h | 3 +++ 2 files changed, 18 insertions(+), 4 deletions(-) diff --git a/drivers/base/driver.c b/drivers/base/driver.c index 839a8513fc25..efbffcdddbcb 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -453,8 +453,19 @@ struct resource *dev_get_resource_by_name(struct device *dev, return ERR_PTR(-ENOENT); } -struct resource *dev_request_mem_resource_by_name(struct device *dev, - const char *name) +static struct resource *dev_request_iomem_resource(struct device *dev, + const struct resource *res) +{ + return request_iomem_region(dev_name(dev), res->start, res->end); +} + +int dev_request_resource(struct device *dev, const struct resource *res) +{ + return PTR_ERR_OR_ZERO(dev_request_iomem_resource(dev, res)); +} +EXPORT_SYMBOL(dev_request_resource); + +struct resource *dev_request_mem_resource_by_name(struct device *dev, const char *name) { struct resource *res; @@ -462,7 +473,7 @@ struct resource *dev_request_mem_resource_by_name(struct device *dev, if (IS_ERR(res)) return ERR_CAST(res); - return request_iomem_region(dev_name(dev), res->start, res->end); + return dev_request_iomem_resource(dev, res); } EXPORT_SYMBOL(dev_request_mem_resource_by_name); @@ -487,7 +498,7 @@ struct resource *dev_request_mem_resource(struct device *dev, int num) if (IS_ERR(res)) return ERR_CAST(res); - return request_iomem_region(dev_name(dev), res->start, res->end); + return dev_request_iomem_resource(dev, res); } void __iomem *dev_request_mem_region_err_null(struct device *dev, int num) diff --git a/include/driver.h b/include/driver.h index e1b1ebde5b5f..b7d6ea1e52c1 100644 --- a/include/driver.h +++ b/include/driver.h @@ -220,6 +220,9 @@ struct resource *dev_get_resource_by_name(struct device *dev, unsigned long type, const char *name); +int dev_request_resource(struct device *dev, + const struct resource *res); + /* * exlusively request register base 'name' for a device */ -- 2.30.2