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dm: core: Add functions to obtain node's address/size cells

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The of_n_addr_cells() and of_n_size_cells() functions are useful for
getting the size of addresses in a node, but in a few places U-Boot needs
to obtain the actual property value for a node without walking up the
stack. Add functions for this and just the existing code to use it.

Add a comment to the existing ofnode functions which do not do the right
thing with a flat tree.

This fixes a problem reading PCI addresses.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
This commit is contained in:
Simon Glass
2017-06-12 06:21:31 -06:00
parent f7d6fcf7ae
commit 878d68c0c3
8 changed files with 128 additions and 6 deletions
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4
drivers/core/regmap.c
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@@ -72,8 +72,8 @@ int regmap_init_mem(struct udevice *dev, struct regmap **mapp)
ofnode node = dev_ofnode(dev);
struct resource r;
addr_len = dev_read_addr_cells(dev->parent);
size_len = dev_read_size_cells(dev->parent);
addr_len = dev_read_simple_addr_cells(dev->parent);
size_len = dev_read_simple_size_cells(dev->parent);
both_len = addr_len + size_len;
len = dev_read_size(dev, "reg");