Sometimes stdout-path contains a UART alias along with speed, etc. For example:
stdout-path = "serial0:115200n8";
Add support for decoding this.
Signed-off-by: Simon Glass sjg@chromium.org ---
drivers/serial/serial-uclass.c | 30 +++++++++++++++++++++++++----- 1 file changed, 25 insertions(+), 5 deletions(-)
diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c index 55011cc..842f78b 100644 --- a/drivers/serial/serial-uclass.c +++ b/drivers/serial/serial-uclass.c @@ -29,14 +29,34 @@ static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
static void serial_find_console_or_panic(void) { + const void *blob = gd->fdt_blob; struct udevice *dev; int node;
- if (CONFIG_IS_ENABLED(OF_CONTROL) && gd->fdt_blob) { + if (CONFIG_IS_ENABLED(OF_CONTROL) && blob) { /* Check for a chosen console */ - node = fdtdec_get_chosen_node(gd->fdt_blob, "stdout-path"); + node = fdtdec_get_chosen_node(blob, "stdout-path"); + if (node < 0) { + const char *str, *p, *name; + + /* + * Deal with things like + * stdout-path = "serial0:115200n8"; + * + * We need to look up the alias and then follow it to + * the correct node. + */ + str = fdtdec_get_chosen_prop(blob, "stdout-path"); + if (str) { + p = strchr(str, ':'); + name = fdt_get_alias_namelen(blob, str, + p ? p - str : strlen(str)); + if (name) + node = fdt_path_offset(blob, name); + } + } if (node < 0) - node = fdt_path_offset(gd->fdt_blob, "console"); + node = fdt_path_offset(blob, "console"); if (!uclass_get_device_by_of_offset(UCLASS_SERIAL, node, &dev)) { gd->cur_serial_dev = dev; @@ -48,14 +68,14 @@ static void serial_find_console_or_panic(void) * bind it anyway. */ if (node > 0 && - !lists_bind_fdt(gd->dm_root, gd->fdt_blob, node, &dev)) { + !lists_bind_fdt(gd->dm_root, blob, node, &dev)) { if (!device_probe(dev)) { gd->cur_serial_dev = dev; return; } } } - if (!SPL_BUILD || !CONFIG_IS_ENABLED(OF_CONTROL) || !gd->fdt_blob) { + if (!SPL_BUILD || !CONFIG_IS_ENABLED(OF_CONTROL) || !blob) { /* * Try to use CONFIG_CONS_INDEX if available (it is numbered * from 1!).