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author | Paul Burton <paul.burton@imgtec.com> | 2016-05-17 07:43:25 +0100 |
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committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2016-05-25 23:13:38 +0200 |
commit | 49717b18be6760cc560767ed3a0c72ecfd3cb076 (patch) | |
tree | 18f7134fc6413b68b4548b0572bf24a12794423b /common | |
parent | 0a222d53d81cbd4f7a440a6f83e243a7b4e80544 (diff) | |
download | u-boot-imx-49717b18be6760cc560767ed3a0c72ecfd3cb076.zip u-boot-imx-49717b18be6760cc560767ed3a0c72ecfd3cb076.tar.gz u-boot-imx-49717b18be6760cc560767ed3a0c72ecfd3cb076.tar.bz2 |
fdt: Document the rest of struct of_bus
Provide some documentation for the fields of struct of_bus, for
consistency with that provided for the new match field.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common')
-rw-r--r-- | common/fdt_support.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c index 96b5d0a..5d8eb12 100644 --- a/common/fdt_support.c +++ b/common/fdt_support.c @@ -966,10 +966,29 @@ static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } /** * struct of_bus - Callbacks for bus specific translators + * @name: A string used to identify this bus in debug output. + * @addresses: The name of the DT property from which addresses are + * to be read, typically "reg". * @match: Return non-zero if the node whose parent is at * parentoffset in the FDT blob corresponds to a bus * of this type, otherwise return zero. If NULL a match * is assumed. + * @count_cells:Count how many cells (be32 values) a node whose parent + * is at parentoffset in the FDT blob will require to + * represent its address (written to *addrc) & size + * (written to *sizec). + * @map: Map the address addr from the address space of this + * bus to that of its parent, making use of the ranges + * read from DT to an array at range. na and ns are the + * number of cells (be32 values) used to hold and address + * or size, respectively, for this bus. pna is the number + * of cells used to hold an address for the parent bus. + * Returns the address in the address space of the parent + * bus. + * @translate: Update the value of the address cells at addr within an + * FDT by adding offset to it. na specifies the number of + * cells used to hold the address being translated. Returns + * zero on success, non-zero on error. * * Each bus type will include a struct of_bus in the of_busses array, * providing implementations of some or all of the functions used to |