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| author | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2019-10-22 11:43:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-05 20:33:13 +0300 |
| commit | c9c8641d3ebd79274af75f7df3e6a9c6cc8a66e9 (patch) | |
| tree | d14690c74beef6a0d8a9a4e15700791abee97b0f | |
| parent | 444b0111f3bc8f3b2bc83dc15f85123034a79bc2 (diff) | |
| download | linux-c9c8641d3ebd79274af75f7df3e6a9c6cc8a66e9.tar.xz | |
drivers: provide devm_platform_ioremap_resource_byname()
Provide a variant of devm_platform_ioremap_resource() that allows to
lookup resources from platform devices by name rather than by index.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20191022084318.22256-7-brgl@bgdev.pl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/driver-api/driver-model/devres.rst | 1 | ||||
| -rw-r--r-- | drivers/base/platform.c | 20 | ||||
| -rw-r--r-- | include/linux/platform_device.h | 3 |
3 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst index 480b78ca3871..4ab193319d8c 100644 --- a/Documentation/driver-api/driver-model/devres.rst +++ b/Documentation/driver-api/driver-model/devres.rst @@ -319,6 +319,7 @@ IOMAP devm_ioremap_resource_wc() devm_platform_ioremap_resource() : calls devm_ioremap_resource() for platform device devm_platform_ioremap_resource_wc() + devm_platform_ioremap_resource_byname() devm_iounmap() pcim_iomap() pcim_iomap_regions() : do request_region() and iomap() on multiple BARs diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 28eb71967f17..1b8a20466eef 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -95,6 +95,26 @@ void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev, res = platform_get_resource(pdev, IORESOURCE_MEM, index); return devm_ioremap_resource_wc(&pdev->dev, res); } + +/** + * devm_platform_ioremap_resource_byname - call devm_ioremap_resource for + * a platform device, retrieve the + * resource by name + * + * @pdev: platform device to use both for memory resource lookup as well as + * resource management + * @name: name of the resource + */ +void __iomem * +devm_platform_ioremap_resource_byname(struct platform_device *pdev, + const char *name) +{ + struct resource *res; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); + return devm_ioremap_resource(&pdev->dev, res); +} +EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource_byname); #endif /* CONFIG_HAS_IOMEM */ /** diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 91fcdbbae89d..276a03c24691 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -60,6 +60,9 @@ devm_platform_ioremap_resource(struct platform_device *pdev, extern void __iomem * devm_platform_ioremap_resource_wc(struct platform_device *pdev, unsigned int index); +extern void __iomem * +devm_platform_ioremap_resource_byname(struct platform_device *pdev, + const char *name); extern int platform_get_irq(struct platform_device *, unsigned int); extern int platform_get_irq_optional(struct platform_device *, unsigned int); extern int platform_irq_count(struct platform_device *); |