diff options
Diffstat (limited to 'arch/arm/mach-tegra/wakeups.c')
| -rw-r--r-- | arch/arm/mach-tegra/wakeups.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/wakeups.c b/arch/arm/mach-tegra/wakeups.c new file mode 100644 index 000000000000..d53563cf22ba --- /dev/null +++ b/arch/arm/mach-tegra/wakeups.c @@ -0,0 +1,85 @@ +/* + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/kernel.h> +#include <linux/gpio.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/interrupt.h> + +#include <mach/iomap.h> +#include <mach/irqs.h> +#include <mach/gpio.h> + +#include "gpio-names.h" +#include "wakeups.h" + +extern int *tegra_wake_event_irq; +extern unsigned int tegra_wake_event_irq_size; + +int tegra_irq_to_wake(int irq) +{ + int i; + int wake_irq; + int search_gpio; + static int last_wake = -1; + + /* Two level wake irq search for gpio based wakeups - + * 1. check for GPIO irq(based on tegra_wake_event_irq table) + * e.g. for a board, wake7 based on GPIO PU6 and irq==390 done first + * 2. check for gpio bank irq assuming search for GPIO irq + * preceded this search. + * e.g. in this step check for gpio bank irq GPIO6 irq==119 + */ + for (i = 0; i < tegra_wake_event_irq_size; i++) { + /* return if step 1 matches */ + if (tegra_wake_event_irq[i] == irq) { + pr_info("Wake%d for irq=%d\n", i, irq); + last_wake = i; + return i; + } + + /* step 2 below uses saved last_wake from step 1 + * in previous call */ + search_gpio = irq_to_gpio( + tegra_wake_event_irq[i]); + if (search_gpio < 0) + continue; + wake_irq = tegra_gpio_get_bank_int_nr(search_gpio); + if (wake_irq < 0) + continue; + if ((last_wake == i) && + (wake_irq == irq)) { + pr_info("gpio bank wake found: wake%d for irq=%d\n", + i, irq); + return i; + } + } + + return -EINVAL; +} + +int tegra_wake_to_irq(int wake) +{ + if (wake < 0) + return -EINVAL; + + if (wake >= tegra_wake_event_irq_size) + return -EINVAL; + + return tegra_wake_event_irq[wake]; +} + |