[PATCH] drivers: add devm_platform_ioremap_resource_byname() helper
From: Yangtao Li <tiny.windzz@gmail.com>
Date: 2019-12-10 20:31:59
Also in:
linux-amlogic, lkml
Subsystem:
driver core, kobjects, debugfs and sysfs, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
There are currently 300+ instances of using platform_get_resource_byname() and devm_ioremap_resource() together in the kernel tree. This patch wraps these two calls in a single helper. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> --- drivers/base/platform.c | 22 +++++++++++++++++++++- include/linux/platform_device.h | 3 +++ 2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index b6c6c7d97d5b..9c4f5e229600 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c@@ -60,6 +60,7 @@ struct resource *platform_get_resource(struct platform_device *dev, } EXPORT_SYMBOL_GPL(platform_get_resource); +#ifdef CONFIG_HAS_IOMEM /** * devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform * device
@@ -68,7 +69,7 @@ EXPORT_SYMBOL_GPL(platform_get_resource); * resource management * @index: resource index */ -#ifdef CONFIG_HAS_IOMEM + void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev, unsigned int index) {
@@ -78,6 +79,25 @@ void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev, return devm_ioremap_resource(&pdev->dev, res); } EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource); + +/** + * devm_platform_ioremap_resource_byname - call devm_ioremap_resource() for + * a platform device + * + * @pdev: platform device to use both for memory resource lookup as well as + * resource managemend + * @name: resource name + */ +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 1b5cec067533..24ff5da9c532 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h@@ -63,6 +63,9 @@ extern int platform_irq_count(struct platform_device *); extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *); +extern void __iomem * +devm_platform_ioremap_resource_byname(struct platform_device *pdev, + const char *name); extern int platform_get_irq_byname(struct platform_device *, const char *); extern int platform_add_devices(struct platform_device **, int);
--
2.17.1
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