svn commit: r261092 - head/sys/dev/uart

[Warner Losh]

Author: imp
Date: Fri Jan 24 00:14:14 2014
New Revision: 261092
URL: http://svnweb.freebsd.org/changeset/base/261092

Log:
  clock-frequency is a FreeBSD-specific extention. Make it optional and
  allow the client uart drivers to decide if a frequency is required.

Modified:
  head/sys/dev/uart/uart_cpu_fdt.c

Modified: head/sys/dev/uart/uart_cpu_fdt.c
==============================================================================
--- head/sys/dev/uart/uart_cpu_fdt.c	Thu Jan 23 21:30:31 2014	(r261091)
+++ head/sys/dev/uart/uart_cpu_fdt.c	Fri Jan 24 00:14:14 2014	(r261092)
@@ -62,9 +62,10 @@ uart_fdt_get_clock(phandle_t node, pcell
 {
 	pcell_t clock;
 
+	/* clock-frequency is a FreeBSD-only extention. */
 	if ((OF_getprop(node, "clock-frequency", &clock,
 	    sizeof(clock))) <= 0)
-		return (ENXIO);
+		clock = 0;
 
 	if (clock == 0)
 		/* Try to retrieve parent 'bus-frequency' */