From e726111f953f8f5b922b953caf06ba6790c5fbaa Mon Sep 17 00:00:00 2001 From: Samu Onkalo Date: Fri, 22 Oct 2010 07:57:25 -0400 Subject: [PATCH] hwmon: lis3: Cleanup interrupt handling Irqcfg moved to chip data instead of platform data. This simplifies access in interrupt handler little bit. Input device open and close functions set status for interrupt threaded handler once. Unnecessary check for interrupt source removed since it is enough that active interrupt line indicates that there was an interrupt. Signed-off-by: Samu Onkalo Acked-by: Eric Piel Signed-off-by: Guenter Roeck --- drivers/hwmon/lis3lv02d.c | 33 +++++++++++---------------------- drivers/hwmon/lis3lv02d.h | 2 ++ 2 files changed, 13 insertions(+), 22 deletions(-) diff --git a/drivers/hwmon/lis3lv02d.c b/drivers/hwmon/lis3lv02d.c index 159e402ddec..d9c97e8c53a 100644 --- a/drivers/hwmon/lis3lv02d.c +++ b/drivers/hwmon/lis3lv02d.c @@ -343,10 +343,14 @@ static void lis3lv02d_joystick_open(struct input_polled_dev *pidev) { if (lis3_dev.pm_dev) pm_runtime_get_sync(lis3_dev.pm_dev); + + if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev) + atomic_set(&lis3_dev.wake_thread, 1); } static void lis3lv02d_joystick_close(struct input_polled_dev *pidev) { + atomic_set(&lis3_dev.wake_thread, 0); if (lis3_dev.pm_dev) pm_runtime_put(lis3_dev.pm_dev); } @@ -366,8 +370,7 @@ static irqreturn_t lis302dl_interrupt(int irq, void *dummy) wake_up_interruptible(&lis3_dev.misc_wait); kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN); out: - if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev && - lis3_dev.idev->input->users) + if (atomic_read(&lis3_dev.wake_thread)) return IRQ_WAKE_THREAD; return IRQ_HANDLED; } @@ -398,31 +401,15 @@ static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3) mutex_unlock(&lis3->mutex); } -static void lis302dl_interrupt_handle_ff_wu(struct lis3lv02d *lis3) -{ - u8 wu1_src; - u8 wu2_src; - - lis3->read(lis3, FF_WU_SRC_1, &wu1_src); - lis3->read(lis3, FF_WU_SRC_2, &wu2_src); - - wu1_src = wu1_src & FF_WU_SRC_IA ? wu1_src : 0; - wu2_src = wu2_src & FF_WU_SRC_IA ? wu2_src : 0; - - /* joystick poll is internally protected by the lis3->mutex. */ - if (wu1_src || wu2_src) - lis3lv02d_joystick_poll(lis3_dev.idev); -} - static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data) { struct lis3lv02d *lis3 = data; - if ((lis3->pdata->irq_cfg & LIS3_IRQ1_MASK) == LIS3_IRQ1_CLICK) + if ((lis3->irq_cfg & LIS3_IRQ1_MASK) == LIS3_IRQ1_CLICK) lis302dl_interrupt_handle_click(lis3); else - lis302dl_interrupt_handle_ff_wu(lis3); + lis3lv02d_joystick_poll(lis3->idev); return IRQ_HANDLED; } @@ -432,10 +419,10 @@ static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data) struct lis3lv02d *lis3 = data; - if ((lis3->pdata->irq_cfg & LIS3_IRQ2_MASK) == LIS3_IRQ2_CLICK) + if ((lis3->irq_cfg & LIS3_IRQ2_MASK) == LIS3_IRQ2_CLICK) lis302dl_interrupt_handle_click(lis3); else - lis302dl_interrupt_handle_ff_wu(lis3); + lis3lv02d_joystick_poll(lis3->idev); return IRQ_HANDLED; } @@ -831,6 +818,7 @@ int lis3lv02d_init_device(struct lis3lv02d *dev) } mutex_init(&dev->mutex); + atomic_set(&dev->wake_thread, 0); lis3lv02d_add_fs(dev); lis3lv02d_poweron(dev); @@ -851,6 +839,7 @@ int lis3lv02d_init_device(struct lis3lv02d *dev) if (dev->whoami == WAI_8B) lis3lv02d_8b_configure(dev, p); + dev->irq_cfg = p->irq_cfg; if (p->irq_cfg) dev->write(dev, CTRL_REG3, p->irq_cfg); } diff --git a/drivers/hwmon/lis3lv02d.h b/drivers/hwmon/lis3lv02d.h index c5c063de2f4..e54a1672ae6 100644 --- a/drivers/hwmon/lis3lv02d.h +++ b/drivers/hwmon/lis3lv02d.h @@ -271,6 +271,8 @@ struct lis3lv02d { struct fasync_struct *async_queue; /* queue for the misc device */ wait_queue_head_t misc_wait; /* Wait queue for the misc device */ unsigned long misc_opened; /* bit0: whether the device is open */ + atomic_t wake_thread; + unsigned char irq_cfg; struct lis3lv02d_platform_data *pdata; /* for passing board config */ struct mutex mutex; /* Serialize poll and selftest */ -- 2.20.1