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ARM: 7369/1: amba: add functions to add devices dynamically

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Add two functions to add APB and AHB devices to the amba (PrimeCell)
bus dynamically. This is modeled after the static definition
macros recently introduced into <linux/amba/bus.h> and can
help us in factoring out a bunch of code across the kernel.
Since a lot of call sites seem to be using a returned struct
amba device* pointer, let's use that.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Linus Walleij 2012-04-03 11:58:42 +01:00 committed by Russell King
parent e816b57a33
commit 6026aa907b
2 changed files with 57 additions and 0 deletions
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49
drivers/amba/bus.c
View File

@ -543,6 +543,55 @@ int amba_device_add(struct amba_device *dev, struct resource *parent)
}
EXPORT_SYMBOL_GPL(amba_device_add);
static struct amba_device *
amba_aphb_device_add(struct device *parent, const char *name,
resource_size_t base, size_t size, int irq1, int irq2,
void *pdata, unsigned int periphid, u64 dma_mask)
{
struct amba_device *dev;
int ret;
dev = amba_device_alloc(name, base, size);
if (!dev)
return ERR_PTR(-ENOMEM);
dev->dma_mask = dma_mask;
dev->dev.coherent_dma_mask = dma_mask;
dev->irq[0] = irq1;
dev->irq[1] = irq2;
dev->periphid = periphid;
dev->dev.platform_data = pdata;
dev->dev.parent = parent;
ret = amba_device_add(dev, &iomem_resource);
if (ret) {
amba_device_put(dev);
return ERR_PTR(ret);
}
return dev;
}
struct amba_device *
amba_apb_device_add(struct device *parent, const char *name,
resource_size_t base, size_t size, int irq1, int irq2,
void *pdata, unsigned int periphid)
{
return amba_aphb_device_add(parent, name, base, size, irq1, irq2, pdata,
periphid, 0);
}
EXPORT_SYMBOL_GPL(amba_apb_device_add);
struct amba_device *
amba_ahb_device_add(struct device *parent, const char *name,
resource_size_t base, size_t size, int irq1, int irq2,
void *pdata, unsigned int periphid)
{
return amba_aphb_device_add(parent, name, base, size, irq1, irq2, pdata,
periphid, ~0ULL);
}
EXPORT_SYMBOL_GPL(amba_ahb_device_add);
static void amba_device_initialize(struct amba_device *dev, const char *name)
{
device_initialize(&dev->dev);

8
include/linux/amba/bus.h
View File

@ -63,6 +63,14 @@ struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t);
void amba_device_put(struct amba_device *);
int amba_device_add(struct amba_device *, struct resource *);
int amba_device_register(struct amba_device *, struct resource *);
struct amba_device *amba_apb_device_add(struct device *parent, const char *name,
resource_size_t base, size_t size,
int irq1, int irq2, void *pdata,
unsigned int periphid);
struct amba_device *amba_ahb_device_add(struct device *parent, const char *name,
resource_size_t base, size_t size,
int irq1, int irq2, void *pdata,
unsigned int periphid);
void amba_device_unregister(struct amba_device *);
struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int);
int amba_request_regions(struct amba_device *, const char *);