diff options
Diffstat (limited to 'drivers/core/ofnode.c')
-rw-r--r-- | drivers/core/ofnode.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c index 45ea84e9fb..42f3c09a51 100644 --- a/drivers/core/ofnode.c +++ b/drivers/core/ofnode.c @@ -31,6 +31,68 @@ bool ofnode_name_eq(ofnode node, const char *name) return (strlen(name) == len) && !strncmp(node_name, name, len); } +int ofnode_read_u8(ofnode node, const char *propname, u8 *outp) +{ + const u8 *cell; + int len; + + assert(ofnode_valid(node)); + debug("%s: %s: ", __func__, propname); + + if (ofnode_is_np(node)) + return of_read_u8(ofnode_to_np(node), propname, outp); + + cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname, + &len); + if (!cell || len < sizeof(*cell)) { + debug("(not found)\n"); + return -EINVAL; + } + *outp = *cell; + debug("%#x (%d)\n", *outp, *outp); + + return 0; +} + +u8 ofnode_read_u8_default(ofnode node, const char *propname, u8 def) +{ + assert(ofnode_valid(node)); + ofnode_read_u8(node, propname, &def); + + return def; +} + +int ofnode_read_u16(ofnode node, const char *propname, u16 *outp) +{ + const fdt16_t *cell; + int len; + + assert(ofnode_valid(node)); + debug("%s: %s: ", __func__, propname); + + if (ofnode_is_np(node)) + return of_read_u16(ofnode_to_np(node), propname, outp); + + cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname, + &len); + if (!cell || len < sizeof(*cell)) { + debug("(not found)\n"); + return -EINVAL; + } + *outp = be16_to_cpup(cell); + debug("%#x (%d)\n", *outp, *outp); + + return 0; +} + +u16 ofnode_read_u16_default(ofnode node, const char *propname, u16 def) +{ + assert(ofnode_valid(node)); + ofnode_read_u16(node, propname, &def); + + return def; +} + int ofnode_read_u32(ofnode node, const char *propname, u32 *outp) { return ofnode_read_u32_index(node, propname, 0, outp); |