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| author | John Linn <john.linn@xilinx.com> | 2009-06-05 11:36:31 -0600 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2009-12-14 08:45:03 +0100 |
| commit | 6d858535be59b220c0f8dc335e030c2e3f3a3032 (patch) | |
| tree | 6760484ac9aaaf867a3889886ed178479783d792 /arch | |
| parent | 95dfbbe4700016bddd7e8915e95a97652e70f495 (diff) | |
| download | linux-3.10-6d858535be59b220c0f8dc335e030c2e3f3a3032.tar.gz linux-3.10-6d858535be59b220c0f8dc335e030c2e3f3a3032.tar.bz2 linux-3.10-6d858535be59b220c0f8dc335e030c2e3f3a3032.zip | |
microblaze: Fix the heartbeat gpio to be more robust
The device tree handling for the gpio in the heart beat was not handling
the system when there was no gpio and it wasn't working with a newer version
of the gpio core which does not have the is-bidir property.
Signed-off-by: John Linn <john.linn@xilinx.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/microblaze/kernel/heartbeat.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/microblaze/kernel/heartbeat.c b/arch/microblaze/kernel/heartbeat.c index 1bdf20222b9..522751737cf 100644 --- a/arch/microblaze/kernel/heartbeat.c +++ b/arch/microblaze/kernel/heartbeat.c @@ -45,6 +45,7 @@ void heartbeat(void) void setup_heartbeat(void) { struct device_node *gpio = NULL; + int *prop; int j; char *gpio_list[] = { "xlnx,xps-gpio-1.00.a", @@ -58,10 +59,14 @@ void setup_heartbeat(void) break; } - base_addr = *(int *) of_get_property(gpio, "reg", NULL); - base_addr = (unsigned long) ioremap(base_addr, PAGE_SIZE); - printk(KERN_NOTICE "Heartbeat GPIO at 0x%x\n", base_addr); + if (gpio) { + base_addr = *(int *) of_get_property(gpio, "reg", NULL); + base_addr = (unsigned long) ioremap(base_addr, PAGE_SIZE); + printk(KERN_NOTICE "Heartbeat GPIO at 0x%x\n", base_addr); - if (*(int *) of_get_property(gpio, "xlnx,is-bidir", NULL)) - out_be32(base_addr + 4, 0); /* GPIO is configured as output */ + /* GPIO is configured as output */ + prop = (int *) of_get_property(gpio, "xlnx,is-bidir", NULL); + if (prop) + out_be32(base_addr + 4, 0); + } } |