From 33afa315c3c941b303e9b3152552010ad266ebbf Mon Sep 17 00:00:00 2001 From: pierre Kuo Date: Wed, 19 Aug 2020 15:57:05 +0800 Subject: [PATCH 2/2] driver core: platform: provide devm_platform_iounremap_resource Combine platform_get_resource() and devm_iounremap_resource() to release the iomem allocated by devm_platform_get_and_ioremap_resource(). Signed-off-by: pierre Kuo --- drivers/base/platform.c | 24 ++++++++++++++++++++++++ include/linux/platform_device.h | 4 ++++ 2 files changed, 28 insertions(+) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index e5d8a0503b4f..e2655c00873f 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -84,6 +84,30 @@ devm_platform_get_and_ioremap_resource(struct platform_device *pdev, } EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource); +/** + * devm_platform_iounremap_resource - call devm_iounremap_resource() for a + * platform device with memory that addr points to. + * + * @pdev: platform device to use both for memory resource lookup as well as + * resource management + * @index: resource index + * @addr: address to be unmap. + */ +void +devm_platform_iounremap_resource(struct platform_device *pdev, + unsigned int index, void __iomem *addr) +{ + struct resource *r; + + r = platform_get_resource(pdev, IORESOURCE_MEM, index); + if (!r) + dev_err(&pdev->dev, + "MEM resource index %d not found\n", index); + else + devm_iounremap_resource(&pdev->dev, r, addr); +} +EXPORT_SYMBOL_GPL(devm_platform_iounremap_resource); + /** * devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform * device diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 77a2aada106d..75da15937679 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -67,6 +67,10 @@ devm_platform_ioremap_resource_wc(struct platform_device *pdev, extern void __iomem * devm_platform_ioremap_resource_byname(struct platform_device *pdev, const char *name); +extern void +devm_platform_iounremap_resource(struct platform_device *pdev, + unsigned int index, + void __iomem *addr); 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 *); -- 2.17.1