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rk2928: usb_detect: support bvalid irq wake up system

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This commit is contained in:
黄涛 2012-08-20 20:52:44 +08:00
parent e2c1923a25
commit d663394000
1 changed files with 52 additions and 1 deletions
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53
arch/arm/plat-rk/usb_detect.c
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@ -4,6 +4,8 @@
#include <linux/gpio.h>
#include <mach/board.h>
#define WAKE_LOCK_TIMEOUT (10 * HZ)
static irqreturn_t usb_detect_irq_handler(int irq, void *dev_id);
static int detect_gpio = INVALID_GPIO;
@ -28,7 +30,7 @@ static struct wake_lock usb_wakelock;
static irqreturn_t usb_detect_irq_handler(int irq, void *dev_id)
{
wake_lock_timeout(&usb_wakelock, 10 * HZ);
wake_lock_timeout(&usb_wakelock, WAKE_LOCK_TIMEOUT);
schedule_delayed_work(&wakeup_work, HZ / 10);
return IRQ_HANDLED;
}
@ -72,3 +74,52 @@ int board_usb_detect_init(unsigned gpio)
return 0;
}
#if defined(CONFIG_ARCH_RK2928)
#include <linux/io.h>
#include <mach/iomux.h>
static irqreturn_t bvalid_irq_handler(int irq, void *dev_id)
{
/* clear irq */
#ifdef CONFIG_ARCH_RK2928
writel_relaxed((1 << 31) | (1 << 15), RK2928_GRF_BASE + GRF_UOC0_CON5);
#endif
wake_lock_timeout(&usb_wakelock, WAKE_LOCK_TIMEOUT);
rk28_send_wakeup_key();
return IRQ_HANDLED;
}
static int bvalid_init(void)
{
int ret;
int irq = IRQ_OTG_BVALID;
if (detect_gpio != INVALID_GPIO) {
printk("usb detect inited by board_usb_detect_init, disable detect by bvalid irq\n");
return 0;
}
if (!wakelock_inited) {
wake_lock_init(&usb_wakelock, WAKE_LOCK_SUSPEND, "usb_detect");
wakelock_inited = true;
}
ret = request_irq(irq, bvalid_irq_handler, 0, "bvalid", NULL);
if (ret < 0) {
pr_err("%s: request_irq(%d) failed\n", __func__, irq);
return ret;
}
/* enable bvalid irq */
#ifdef CONFIG_ARCH_RK2928
writel_relaxed((1 << 30) | (1 << 14), RK2928_GRF_BASE + GRF_UOC0_CON5);
#endif
enable_irq_wake(irq);
return 0;
}
late_initcall(bvalid_init);
#endif