[PATCH 5/5] implement resource management for platform devices
Sascha Hauer
s.hauer at pengutronix.de
Mon Dec 5 03:56:01 EST 2011
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
drivers/base/driver.c | 29 +++++++++++++++++++++++++++--
include/driver.h | 6 +-----
2 files changed, 28 insertions(+), 7 deletions(-)
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 0b80103..0132e7d 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -214,7 +214,7 @@ int register_driver(struct driver_d *drv)
}
EXPORT_SYMBOL(register_driver);
-void __iomem *dev_get_mem_region(struct device_d *dev, int num)
+static struct resource *dev_get_resource(struct device_d *dev, int num)
{
int i, n = 0;
@@ -222,15 +222,40 @@ void __iomem *dev_get_mem_region(struct device_d *dev, int num)
struct resource *res = &dev->resource[i];
if (resource_type(res) == IORESOURCE_MEM) {
if (n == num)
- return (void __force __iomem *)res->start;
+ return res;
n++;
}
}
return NULL;
}
+
+void __iomem *dev_get_mem_region(struct device_d *dev, int num)
+{
+ struct resource *res;
+
+ res = dev_get_resource(dev, num);
+ if (!res)
+ return res;
+
+ return (void __force __iomem *)res->start;
+}
EXPORT_SYMBOL(dev_get_mem_region);
+void __iomem *dev_request_mem_region(struct device_d *dev, int num)
+{
+ struct resource *res;
+
+ res = dev_get_resource(dev, num);
+ if (!res)
+ return NULL;
+
+ res = request_iomem_region(dev_name(dev), res->start, res->size);
+
+ return (void __force __iomem *)res->start;
+}
+EXPORT_SYMBOL(dev_request_mem_region);
+
int dev_protect(struct device_d *dev, size_t count, unsigned long offset, int prot)
{
printf("%s: currently broken\n", __func__);
diff --git a/include/driver.h b/include/driver.h
index fe9d37a..bbe7248 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -190,11 +190,7 @@ void __iomem *dev_get_mem_region(struct device_d *dev, int num);
/*
* exlusively request register base 'num' for a device
*/
-static inline void __iomem *dev_request_mem_region(struct device_d *dev, int num)
-{
- /* no resource tracking yet */
- return dev_get_mem_region(dev, num);
-}
+void __iomem *dev_request_mem_region(struct device_d *dev, int num);
/*
* register a generic device
--
1.7.7.3
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