From d54f5b1b48046a418781352d53567130edd5bcde Mon Sep 17 00:00:00 2001 From: Jean-Christophe PLAGNIOL-VILLARD Date: Wed, 17 Oct 2012 15:05:14 +0200 Subject: [PATCH] driver: add support for requesting resource by name this will allow to avoid issue with resource order Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD Signed-off-by: Sascha Hauer --- drivers/base/driver.c | 46 +++++++++++++++++++++++++++++++++++++++++++ include/driver.h | 15 ++++++++++++++ 2 files changed, 61 insertions(+) diff --git a/drivers/base/driver.c b/drivers/base/driver.c index 3ce7953dc..3f5f6a2a1 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -252,6 +252,52 @@ void *dev_get_mem_region(struct device_d *dev, int num) } EXPORT_SYMBOL(dev_get_mem_region); +struct resource *dev_get_resource_by_name(struct device_d *dev, + const char *name) +{ + int i; + + for (i = 0; i < dev->num_resources; i++) { + struct resource *res = &dev->resource[i]; + if (resource_type(res) != IORESOURCE_MEM) + continue; + if (!res->name) + continue; + if (!strcmp(name, res->name)) + return res; + } + + return NULL; +} + +void *dev_get_mem_region_by_name(struct device_d *dev, const char *name) +{ + struct resource *res; + + res = dev_get_resource_by_name(dev, name); + if (!res) + return NULL; + + return (void __force *)res->start; +} +EXPORT_SYMBOL(dev_get_mem_region_by_name); + +void __iomem *dev_request_mem_region_by_name(struct device_d *dev, const char *name) +{ + struct resource *res; + + res = dev_get_resource_by_name(dev, name); + if (!res) + return NULL; + + res = request_iomem_region(dev_name(dev), res->start, res->end); + if (!res) + return NULL; + + return (void __force __iomem *)res->start; +} +EXPORT_SYMBOL(dev_request_mem_region_by_name); + void __iomem *dev_request_mem_region(struct device_d *dev, int num) { struct resource *res; diff --git a/include/driver.h b/include/driver.h index 491805488..f8d815c61 100644 --- a/include/driver.h +++ b/include/driver.h @@ -192,6 +192,21 @@ static inline const char *dev_name(const struct device_d *dev) return dev_id(dev); } +/* + * get resource base 'name' for a device + */ +struct resource *dev_get_resource_by_name(struct device_d *dev, + const char *name); +/* + * get register base 'name' for a device + */ +void *dev_get_mem_region_by_name(struct device_d *dev, const char *name); + +/* + * exlusively request register base 'name' for a device + */ +void __iomem *dev_request_mem_region_by_name(struct device_d *dev, + const char *name); /* * get register base 'num' for a device */