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Commit 202e9ebf authored by Xiaocheng Li's avatar Xiaocheng Li
Browse files

of/address: Add new API of_iomap_by_name and of_get_address_by_name 



Create new API of_iomap_by_name and of_get_address_by_name, which
would read "reg-names" property and get the reg address by its
name.

Change-Id: I7ce30da5a7cbc29f8349641af97ac7ed16b4f506
Signed-off-by: default avatarXiaocheng Li <lix@codeaurora.org>
parent a65cf5a3

drivers/of/address.c

+32 −0
Original line number Original line Diff line number Diff line
@@ -552,6 +552,22 @@ const __be32 *of_get_address(struct device_node *dev, int index, u64 *size, 
}

}

EXPORT_SYMBOL(of_get_address);

EXPORT_SYMBOL(of_get_address);





const __be32 *of_get_address_by_name(struct device_node *dev, const char *name,

		u64 *size, unsigned int *flags)

{

	int index;

	if (!name)

		return NULL;



	/* Try to read "reg-names" property and get the index by name */

	index = of_property_match_string(dev, "reg-names", name);

	if (index < 0)

		return NULL;



	return of_get_address(dev, index, size, flags);

}

EXPORT_SYMBOL(of_get_address_by_name);



static int __of_address_to_resource(struct device_node *dev,

static int __of_address_to_resource(struct device_node *dev,

		const __be32 *addrp, u64 size, unsigned int flags,

		const __be32 *addrp, u64 size, unsigned int flags,

		const char *name, struct resource *r)

		const char *name, struct resource *r)
@@ -644,3 +660,19 @@ void __iomem *of_iomap(struct device_node *np, int index) 
	return ioremap(res.start, resource_size(&res));

	return ioremap(res.start, resource_size(&res));

}

}

EXPORT_SYMBOL(of_iomap);

EXPORT_SYMBOL(of_iomap);



void __iomem *of_iomap_by_name(struct device_node *np, const char *name)

{

	int index;



	if (!name)

		return NULL;



	/* Try to read "reg-names" property and get the index by name */

	index = of_property_match_string(np, "reg-names", name);

	if (index < 0)

		return NULL;



	return of_iomap(np, index);

}

EXPORT_SYMBOL(of_iomap_by_name);

include/linux/of_address.h

+4 −0
Original line number Original line Diff line number Diff line
@@ -14,6 +14,8 @@ extern struct device_node *of_find_matching_node_by_address( 
					const struct of_device_id *matches,

					const struct of_device_id *matches,

					u64 base_address);

					u64 base_address);

extern void __iomem *of_iomap(struct device_node *device, int index);

extern void __iomem *of_iomap(struct device_node *device, int index);

extern void __iomem *of_iomap_by_name(struct device_node *device,

					const char *name);





/* Extract an address from a device, returns the region size and

/* Extract an address from a device, returns the region size and

 * the address space flags too. The PCI version uses a BAR number

 * the address space flags too. The PCI version uses a BAR number
@@ -21,6 +23,8 @@ extern void __iomem *of_iomap(struct device_node *device, int index); 
 */

 */

extern const __be32 *of_get_address(struct device_node *dev, int index,

extern const __be32 *of_get_address(struct device_node *dev, int index,

			   u64 *size, unsigned int *flags);

			   u64 *size, unsigned int *flags);

extern const __be32 *of_get_address_by_name(struct device_node *dev,

			   const char *name, u64 *size, unsigned int *flags);





#ifndef pci_address_to_pio

#ifndef pci_address_to_pio

static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }

static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }