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dm: core: Add dev_get_addr_ptr() to return a pointer to the reg address

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On some platforms (e.g. x86), the return value of dev_get_addr() can't
be assigned to a pointer type variable directly. As there might be a
difference between the size of fdt_addr_t and the pointer type. On
x86 for example, "fdt_addr_t" is 64bit but "void *" only 32bit. So
assigning the register base directly in dev_get_addr() results in this
compilation warning:
  warning: cast to pointer from integer of different size

This patch introduces the new function dev_get_addr_ptr() that
returns a pointer to the 'reg' address that can be used by drivers
in this case.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Stefan Roese 2016-04-21 07:11:34 +02:00 • committed by Heiko Schocher
parent 65341967ce
commit 28027521be
2 changed files with 15 additions and 0 deletions
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5
drivers/core/device.c
View file

@ -673,6 +673,11 @@ fdt_addr_t dev_get_addr(struct udevice *dev)
return dev_get_addr_index(dev, 0); return dev_get_addr_index(dev, 0);
} }
void *dev_get_addr_ptr(struct udevice *dev)
{
return (void *)(uintptr_t)dev_get_addr_index(dev, 0);
}
bool device_has_children(struct udevice *dev) bool device_has_children(struct udevice *dev)
{ {
return !list_empty(&dev->child_head); return !list_empty(&dev->child_head);

10
include/dm/device.h
View file

@ -453,6 +453,16 @@ int device_find_next_child(struct udevice **devp);
*/ */
fdt_addr_t dev_get_addr(struct udevice *dev); fdt_addr_t dev_get_addr(struct udevice *dev);
/**
* dev_get_addr_ptr() - Return pointer to the address of the reg property
* of a device
*
* @dev: Pointer to a device
*
* @return Pointer to addr, or NULL if there is no such property
*/
void *dev_get_addr_ptr(struct udevice *dev);
/** /**
* dev_get_addr_index() - Get the indexed reg property of a device * dev_get_addr_index() - Get the indexed reg property of a device
* *