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| author | Yuntao Wang <yuntao.wang@linux.dev> | 2025-11-15 21:47:46 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-12-18 14:03:07 +0100 |
| commit | 7045d5970e16393c1ad3fd1b27c433b6c22c6dee (patch) | |
| tree | acdaa2fe673ec3580ceb0b7b4929da1b8f917a44 /drivers/of | |
| parent | d0482ca91d76b337fd485a2437edabc530b3630f (diff) | |
| download | linux-7045d5970e16393c1ad3fd1b27c433b6c22c6dee.tar.gz linux-7045d5970e16393c1ad3fd1b27c433b6c22c6dee.tar.bz2 linux-7045d5970e16393c1ad3fd1b27c433b6c22c6dee.zip | |
of/fdt: Consolidate duplicate code into helper functions
[ Upstream commit 8278cb72c60399f6dc6300c409879fb4c7291513 ]
Currently, there are many pieces of nearly identical code scattered across
different places. Consolidate the duplicate code into helper functions to
improve maintainability and reduce the likelihood of errors.
Signed-off-by: Yuntao Wang <yuntao.wang@linux.dev>
Link: https://patch.msgid.link/20251115134753.179931-2-yuntao.wang@linux.dev
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Stable-dep-of: bec5f6092bc1 ("of/fdt: Fix the len check in early_init_dt_check_for_elfcorehdr()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/fdt.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 0edd639898a6..0c18bdefbbee 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -625,6 +625,47 @@ const void *__init of_get_flat_dt_prop(unsigned long node, const char *name, return fdt_getprop(initial_boot_params, node, name, size); } +const __be32 *__init of_flat_dt_get_addr_size_prop(unsigned long node, + const char *name, + int *entries) +{ + const __be32 *prop; + int len, elen = (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32); + + prop = of_get_flat_dt_prop(node, name, &len); + if (!prop || len % elen) { + *entries = 0; + return NULL; + } + + *entries = len / elen; + return prop; +} + +bool __init of_flat_dt_get_addr_size(unsigned long node, const char *name, + u64 *addr, u64 *size) +{ + const __be32 *prop; + int entries; + + prop = of_flat_dt_get_addr_size_prop(node, name, &entries); + if (!prop || entries != 1) + return false; + + of_flat_dt_read_addr_size(prop, 0, addr, size); + return true; +} + +void __init of_flat_dt_read_addr_size(const __be32 *prop, int entry_index, + u64 *addr, u64 *size) +{ + int entry_cells = dt_root_addr_cells + dt_root_size_cells; + prop += entry_cells * entry_index; + + *addr = dt_mem_next_cell(dt_root_addr_cells, &prop); + *size = dt_mem_next_cell(dt_root_size_cells, &prop); +} + /** * of_fdt_is_compatible - Return true if given node from the given blob has * compat in its compatible list |