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fdt: implement dev_get_addr_name()

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This function parses the reg property based on an index found in the
reg-names property. This is required for bindings that are written
using reg-names rather than hard-coding indices in reg.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stephen Warren 2016-04-06 12:49:19 -06:00 committed by Simon Glass
parent 690d8a92c1
commit 43c4d44e33
2 changed files with 28 additions and 0 deletions
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16
drivers/core/device.c
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@ -652,6 +652,22 @@ fdt_addr_t dev_get_addr_index(struct udevice *dev, int index)
#endif
}
fdt_addr_t dev_get_addr_name(struct udevice *dev, const char *name)
{
#if CONFIG_IS_ENABLED(OF_CONTROL)
int index;
index = fdt_find_string(gd->fdt_blob, dev->parent->of_offset,
"reg-names", name);
if (index < 0)
return index;
return dev_get_addr_index(dev, index);
#else
return FDT_ADDR_T_NONE;
#endif
}
fdt_addr_t dev_get_addr(struct udevice *dev)
{
return dev_get_addr_index(dev, 0);

12
include/dm/device.h
View file

@ -464,6 +464,18 @@ fdt_addr_t dev_get_addr(struct udevice *dev);
*/
fdt_addr_t dev_get_addr_index(struct udevice *dev, int index);
/**
* dev_get_addr_name() - Get the reg property of a device, indexed by name
*
* @dev: Pointer to a device
* @name: the 'reg' property can hold a list of <addr, size> pairs, with the
* 'reg-names' property providing named-based identification. @index
* indicates the value to search for in 'reg-names'.
*
* @return addr
*/
fdt_addr_t dev_get_addr_name(struct udevice *dev, const char *name);
/**
* device_has_children() - check if a device has any children
*