Hi Andrew,

On 02/26/2015 08:46 AM, Andrew Lunn wrote:

On Thu, Feb 26, 2015 at 06:55:22AM -0500, Peter Hurley wrote:

quoted

On 11/27/2014 12:56 PM, Leif Lindholm wrote:

quoted

Support specifying console options (like with console=ttyXN,<options>)
by appending them to the stdout-path property after a separating ':'.

Example:
        stdout-path = "uart0:115200";

This format breaks DT earlycon because libfdt doesn't recognize ':' as a
path terminator.

It's simple enough to fix this directly in early_init_dt_scan_chosen_serial()
but perhaps it would better to teach fdt_path_offset() to recognize ':'?

Hi Peter

ePAPR says for stdout-path in Chosen:

A string that specifies the full path to the node representing the
device to be used for boot console output. If the character ":" is
present in the value it terminates the path. The value may be an
alias.

So it is probably wise to implement this properly.

Sorry if I was unclear. My question was not _whether_ to fix this
for earlycon, but rather _how_.

IOW, is the ':' character accepted as a path terminator for
1. all nodes, so fix this in fdt_path_offset();
2. only chosen nodes;
3. unique to stdout-path, so fix this in early_init_dt_scan_chosen_serial()?

Regards,
Peter Hurley