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fdt: Add device tree memory bindings

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Support a default memory bank, specified in reg, as well as
board-specific memory banks in subtree board-id nodes.

This allows memory information to be provided in the device tree,
rather than hard-coded in, which will make it simpler to handle
similar devices with different memory banks, as the board-id values
or masks can be used to match devices.

Signed-off-by: Michael Pratt <mpratt@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
This commit is contained in:
Michael Pratt 2018-06-11 13:07:09 -06:00 • committed by Simon Glass
parent 8c5d4fd0ec
commit 90c08fa038
5 changed files with 224 additions and 1 deletions
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10
include/fdt_support.h
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@ -283,6 +283,16 @@ int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
int fdt_overlay_apply_verbose(void *fdt, void *fdto);
/**
* fdt_get_cells_len() - Get the length of a type of cell in top-level nodes
*
* Returns the length of the cell type in bytes (4 or 8).
*
* @blob: Pointer to device tree blob
* @nr_cells_name: Name to lookup, e.g. "#address-cells"
*/
int fdt_get_cells_len(const void *blob, char *nr_cells_name);
#endif /* ifdef CONFIG_OF_LIBFDT */
#ifdef USE_HOSTCC