[PATCH v2 1/4] drivers: provide devm_platform_get_and_ioremap_resource_byname()
From: Andrei Stefanescu <hidden>
Date: 2024-09-13 08:30:31
Also in:
linux-devicetree, linux-gpio, lkml
Subsystem:
driver core, kobjects, debugfs and sysfs, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
Similar to commit 890cc39a879906b63912482dfc41944579df2dc6
("drivers: provide devm_platform_get_and_ioremap_resource()")
add a wrapper for "platform_get_resource_byname" and
"devm_ioremap_resource". This new wrapper also returns the resource, if
any, via a pointer.
Suggested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Andrei Stefanescu <redacted>
---
drivers/base/platform.c | 28 ++++++++++++++++++++++++++++
include/linux/platform_device.h | 13 +++++++++++++
2 files changed, 41 insertions(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 4c3ee6521ba5..ab48c02fcb2c 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c@@ -108,6 +108,34 @@ devm_platform_get_and_ioremap_resource(struct platform_device *pdev, } EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource); +/** + * devm_platform_get_and_ioremap_resource_byname - call devm_ioremap_resource() + * for a platform device and get + * a resource by its name instead + * of the index + * + * @pdev: platform device to use both for memory resource lookup as well as + * resource management + * @name: resource name + * @res: optional output parameter to store a pointer to the obtained resource. + * + * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code + * on failure. + */ +void __iomem * +devm_platform_get_and_ioremap_resource_byname(struct platform_device *pdev, + const char *name, + struct resource **res) +{ + struct resource *r; + + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); + if (res) + *res = r; + return devm_ioremap_resource(&pdev->dev, r); +} +EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource_byname); + /** * 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 d422db6eec63..ab7f33f3c426 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h@@ -68,6 +68,12 @@ platform_find_device_by_driver(struct device *start, extern void __iomem * devm_platform_get_and_ioremap_resource(struct platform_device *pdev, unsigned int index, struct resource **res); + +extern void __iomem * +devm_platform_get_and_ioremap_resource_byname(struct platform_device *pdev, + const char *name, + struct resource **res); + extern void __iomem * devm_platform_ioremap_resource(struct platform_device *pdev, unsigned int index);
@@ -83,6 +89,13 @@ devm_platform_get_and_ioremap_resource(struct platform_device *pdev, return ERR_PTR(-EINVAL); } +static inline void __iomem * +devm_platform_get_and_ioremap_resource_byname(struct platform_device *pdev, + const char *name, + struct resource **res) +{ + return ERR_PTR(-EINVAL); +} static inline void __iomem * devm_platform_ioremap_resource(struct platform_device *pdev,
--
2.45.2