diff options
Diffstat (limited to 'arch/arm/mach-omap2/timer.c')
| -rw-r--r-- | arch/arm/mach-omap2/timer.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c index 69e46631a7c..def9a0ebe42 100644 --- a/arch/arm/mach-omap2/timer.c +++ b/arch/arm/mach-omap2/timer.c @@ -144,6 +144,41 @@ static struct clock_event_device clockevent_gpt = { .set_mode = omap2_gp_timer_set_mode, }; +static struct property device_disabled = { + .name = "status", + .length = sizeof("disabled"), + .value = "disabled", +}; + +static struct of_device_id omap_timer_match[] __initdata = { + { .compatible = "ti,omap2-timer", }, + { } +}; + +/** + * omap_dmtimer_init - initialisation function when device tree is used + * + * For secure OMAP3 devices, timers with device type "timer-secure" cannot + * be used by the kernel as they are reserved. Therefore, to prevent the + * kernel registering these devices remove them dynamically from the device + * tree on boot. + */ +void __init omap_dmtimer_init(void) +{ + struct device_node *np; + + if (!cpu_is_omap34xx()) + return; + + /* If we are a secure device, remove any secure timer nodes */ + if ((omap_type() != OMAP2_DEVICE_TYPE_GP)) { + for_each_matching_node(np, omap_timer_match) { + if (of_get_property(np, "ti,timer-secure", NULL)) + prom_add_property(np, &device_disabled); + } + } +} + static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer, int gptimer_id, const char *fck_source) @@ -437,6 +472,7 @@ static inline void __init realtime_counter_init(void) clksrc_nr, clksrc_src) \ static void __init omap##name##_timer_init(void) \ { \ + omap_dmtimer_init(); \ omap2_gp_clockevent_init((clkev_nr), clkev_src); \ omap2_clocksource_init((clksrc_nr), clksrc_src); \ } |