diff options
| author | Simon Glass <sjg@chromium.org> | 2017-06-12 06:21:31 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2017-07-11 10:08:20 -0600 |
| commit | 878d68c0c357ff62120d5783d950f34ecd1065d9 (patch) | |
| tree | b10e1929ab5e2fefa1f786db8c3ce1df089f35a4 /drivers/core/of_access.c | |
| parent | f7d6fcf7aead384ea39bc7aba581e912c3759eaa (diff) | |
dm: core: Add functions to obtain node's address/size cells
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
Diffstat (limited to 'drivers/core/of_access.c')
| -rw-r--r-- | drivers/core/of_access.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/core/of_access.c b/drivers/core/of_access.c index 93a6560496..2bb23eef88 100644 --- a/drivers/core/of_access.c +++ b/drivers/core/of_access.c @@ -96,6 +96,30 @@ int of_n_size_cells(const struct device_node *np) return OF_ROOT_NODE_SIZE_CELLS_DEFAULT; } +int of_simple_addr_cells(const struct device_node *np) +{ + const __be32 *ip; + + ip = of_get_property(np, "#address-cells", NULL); + if (ip) + return be32_to_cpup(ip); + + /* Return a default of 2 to match fdt_address_cells()*/ + return 2; +} + +int of_simple_size_cells(const struct device_node *np) +{ + const __be32 *ip; + + ip = of_get_property(np, "#size-cells", NULL); + if (ip) + return be32_to_cpup(ip); + + /* Return a default of 2 to match fdt_size_cells()*/ + return 2; +} + struct property *of_find_property(const struct device_node *np, const char *name, int *lenp) { |