diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2013-10-30 15:07:02 +0530 |
|---|---|---|
| committer | Laxman Dewangan <ldewangan@nvidia.com> | 2013-10-30 10:06:45 -0700 |
| commit | 86003361a6b28a12f748439bd3ff8bcdba123339 (patch) | |
| tree | 57090a336f6552b3c3d6d413100bd8e9ca97a822 /arch/arm/mach-tegra/tegra-wakeups.c | |
| parent | 097539e1a189ab66afebcde3a35aa6e26776269e (diff) | |
ARM: tegra: wakeup: add function to get wakeup irq
Add API to get irq number of wakeup source which causes
system to wakeup from LP0.
Change-Id: I3a61099bad9880f1a560d7d9477e1ff69044876b
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/304932
Reviewed-by: Automatic_Commit_Validation_User
Diffstat (limited to 'arch/arm/mach-tegra/tegra-wakeups.c')
| -rw-r--r-- | arch/arm/mach-tegra/tegra-wakeups.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra-wakeups.c b/arch/arm/mach-tegra/tegra-wakeups.c index 5c39dbf49155..0a7c6c43990b 100644 --- a/arch/arm/mach-tegra/tegra-wakeups.c +++ b/arch/arm/mach-tegra/tegra-wakeups.c @@ -18,11 +18,15 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ +#include <linux/export.h> #include <linux/kernel.h> #include <linux/gpio.h> #include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/io.h> #include <linux/irqchip/tegra.h> +#include <linux/system-wakeup.h> #include <mach/irqs.h> #include <mach/gpio-tegra.h> @@ -148,3 +152,27 @@ int tegra_disable_wake_source(int wake) { return tegra_set_wake_source(wake, -EINVAL); } + +int get_wakeup_reason_irq(void) +{ + unsigned long long wake_status = tegra_read_pmc_wake_status(); + unsigned long long mask_ll = 1ULL; + int irq; + struct irq_desc *desc; + int i; + + for (i = 0; i < tegra_wake_table_len; ++i) { + if (mask_ll & wake_status) { + irq = tegra_wake_to_irq(i); + if (!irq) + continue; + desc = irq_to_desc(irq); + if (!desc || !desc->action || !desc->action->name) + continue; + return irq; + } + mask_ll <<= 1; + } + return -EINVAL; +} +EXPORT_SYMBOL_GPL(get_wakeup_reason_irq); |