It is common to have a "reg = <address size>" property in the FDT. Add a function to handle this, similar to the existing fdtdec_get_addr();
Signed-off-by: Simon Glass sjg@chromium.org --- include/fdtdec.h | 15 +++++++++++++++ lib/fdtdec.c | 26 +++++++++++++++++++++----- 2 files changed, 36 insertions(+), 5 deletions(-)
diff --git a/include/fdtdec.h b/include/fdtdec.h index 70d0e97..570d3ac 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -38,11 +38,13 @@ */ #ifdef CONFIG_PHYS_64BIT typedef u64 fdt_addr_t; +typedef u64 fdt_size_t; #define FDT_ADDR_T_NONE (-1ULL) #define fdt_addr_to_cpu(reg) be64_to_cpu(reg) #define fdt_size_to_cpu(reg) be64_to_cpu(reg) #else typedef u32 fdt_addr_t; +typedef u32 fdt_size_t; #define FDT_ADDR_T_NONE (-1U) #define fdt_addr_to_cpu(reg) be32_to_cpu(reg) #define fdt_size_to_cpu(reg) be32_to_cpu(reg) @@ -186,6 +188,19 @@ fdt_addr_t fdtdec_get_addr(const void *blob, int node, const char *prop_name);
/** + * Look up an address property in a node and return it as an address. + * The property must hold one address with a length. This is only tested + * on 32-bit machines. + * + * @param blob FDT blob + * @param node node to examine + * @param prop_name name of property to find + * @return address, if found, or FDT_ADDR_T_NONE if not + */ +fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, + const char *prop_name, fdt_size_t *sizep); + +/** * Look up a 32-bit integer property in a node and return it. The property * must have at least 4 bytes of data. The value of the first cell is * returned. diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 6dba438..d0bc848 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -54,25 +54,41 @@ const char *fdtdec_get_compatible(enum fdt_compat_id id) return compat_names[id]; }
-fdt_addr_t fdtdec_get_addr(const void *blob, int node, - const char *prop_name) +fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, + const char *prop_name, fdt_size_t *sizep) { const fdt_addr_t *cell; int len;
debug("%s: %s: ", __func__, prop_name); cell = fdt_getprop(blob, node, prop_name, &len); - if (cell && (len == sizeof(fdt_addr_t) || + if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || len == sizeof(fdt_addr_t) * 2)) { - fdt_addr_t addr = fdt_addr_to_cpu(*cell);
- debug("%p\n", (void *)addr); + fdt_addr_t addr = fdt_addr_to_cpu(*cell); + if (sizep) { + const fdt_size_t *size; + + size = (fdt_size_t *)((char *)cell + + sizeof(fdt_addr_t)); + *sizep = fdt_size_to_cpu(*size); + debug("addr=%p, size=%p\n", (void *)addr, + (void *)*sizep); + } else { + debug("%p\n", (void *)addr); + } return addr; } debug("(not found)\n"); return FDT_ADDR_T_NONE; }
+fdt_addr_t fdtdec_get_addr(const void *blob, int node, + const char *prop_name) +{ + return fdtdec_get_addr_size(blob, node, prop_name, NULL); +} + s32 fdtdec_get_int(const void *blob, int node, const char *prop_name, s32 default_val) {