From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> 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@xxxxxxxxxxxx> --- .../driver-api/driver-model/devres.rst | 1 + drivers/base/platform.c | 20 +++++++++++++++++++ include/linux/platform_device.h | 3 +++ 3 files changed, 24 insertions(+) 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 d481b8a7d4fc..265d34253865 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 */ static int __platform_get_irq(struct platform_device *dev, unsigned int num) diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 83930790c701..fea5563f6fcf 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 *); -- 2.23.0