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| author | Michal Simek <monstr@monstr.eu> | 2011-12-12 14:02:47 +0100 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2012-10-04 14:29:15 +0200 |
| commit | 88d23b4462c9c9b8c8876d60f5b57d39b53c6227 (patch) | |
| tree | 42a10487a2d7b1ab182c2098894ecee178fb169b /arch/microblaze | |
| parent | microblaze: Add support for ioreadXX/iowriteXX_rep (diff) | |
| download | linux-88d23b4462c9c9b8c8876d60f5b57d39b53c6227.tar.xz linux-88d23b4462c9c9b8c8876d60f5b57d39b53c6227.zip | |
microblaze: Added fdt chosen capability for timer
This lets a dts author flag a particular timer in the system as the system timer.
If the chosen node contains a "system-timer=<&foo>" entry than that handle will
be used to determine the system timer. In no such entry exists then the first
found timer will be used (current behaviour).
Signed-off-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze')
| -rw-r--r-- | arch/microblaze/kernel/timer.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c index 522defa7d41f..edd3f835e7df 100644 --- a/arch/microblaze/kernel/timer.c +++ b/arch/microblaze/kernel/timer.c @@ -257,7 +257,15 @@ void __init time_init(void) 0 }; #endif - timer = of_find_compatible_node(NULL, NULL, "xlnx,xps-timer-1.00.a"); + prop = of_get_property(of_chosen, "system-timer", NULL); + if (prop) + timer = of_find_node_by_phandle(be32_to_cpup(prop)); + else + pr_info("No chosen timer found, using default\n"); + + if (!timer) + timer = of_find_compatible_node(NULL, NULL, + "xlnx,xps-timer-1.00.a"); BUG_ON(!timer); timer_baseaddr = be32_to_cpup(of_get_property(timer, "reg", NULL)); |