We use a combination of the serialN alias and CONFIG_CONS_INDEX to determine which serial alias we should set linux,stdout-path to.
Signed-off-by: Kumar Gala galak@kernel.crashing.org ---
Note, this patch is also in my git tree: git.kernel.org:/pub/scm/boot/u-boot/galak/u-boot.git libfdt_testing
common/fdt_support.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/common/fdt_support.c b/common/fdt_support.c index deb5ef1..381efe0 100644 --- a/common/fdt_support.c +++ b/common/fdt_support.c @@ -28,6 +28,7 @@ #include <fdt.h> #include <libfdt.h> #include <fdt_support.h> +#include <exports.h>
/* * Global data (for the gd->bd) @@ -67,6 +68,41 @@ int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, return fdt_setprop(fdt, nodeoff, prop, val, len); }
+static int fdt_fixup_stdout(void *fdt, int choosenoff) +{ + int err = 0; +#ifdef CONFIG_CONS_INDEX + int node; + char sername[9] = { 0 }; + const char *path; + + sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); + + err = node = fdt_path_offset(fdt, "/aliases"); + if (node >= 0) { + int len; + path = fdt_getprop(fdt, node, sername, &len); + if (path) { + char *p = malloc(len); + err = -FDT_ERR_NOSPACE; + if (p) { + memcpy(p, path, len); + err = fdt_setprop(fdt, choosenoff, + "linux,stdout-path", p, len); + free(p); + } + } else { + err = len; + } + } +#endif + if (err < 0) + printf("WARNING: could not set linux,stdout-path %s.\n", + fdt_strerror(err)); + + return err; +} + int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force) { int nodeoffset; @@ -157,6 +193,9 @@ int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force) printf("WARNING: could not set linux,initrd-end %s.\n", fdt_strerror(err)); } + + err = fdt_fixup_stdout(fdt, nodeoffset); + #ifdef OF_STDOUT_PATH err = fdt_setprop(fdt, nodeoffset, "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);