diff options
Diffstat (limited to 'drivers/hwmon/lis3lv02d.c')
| -rw-r--r-- | drivers/hwmon/lis3lv02d.c | 88 |
1 files changed, 29 insertions, 59 deletions
diff --git a/drivers/hwmon/lis3lv02d.c b/drivers/hwmon/lis3lv02d.c index 17f200341bc..df3f58613f7 100644 --- a/drivers/hwmon/lis3lv02d.c +++ b/drivers/hwmon/lis3lv02d.c @@ -105,56 +105,39 @@ static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) { int position[3]; - position[0] = lis3_dev.read_data(lis3, OUTX); - position[1] = lis3_dev.read_data(lis3, OUTY); - position[2] = lis3_dev.read_data(lis3, OUTZ); + position[0] = lis3->read_data(lis3, OUTX); + position[1] = lis3->read_data(lis3, OUTY); + position[2] = lis3->read_data(lis3, OUTZ); - *x = lis3lv02d_get_axis(lis3_dev.ac.x, position); - *y = lis3lv02d_get_axis(lis3_dev.ac.y, position); - *z = lis3lv02d_get_axis(lis3_dev.ac.z, position); + *x = lis3lv02d_get_axis(lis3->ac.x, position); + *y = lis3lv02d_get_axis(lis3->ac.y, position); + *z = lis3lv02d_get_axis(lis3->ac.z, position); } void lis3lv02d_poweroff(struct lis3lv02d *lis3) { - lis3_dev.is_on = 0; + /* disable X,Y,Z axis and power down */ + lis3->write(lis3, CTRL_REG1, 0x00); } EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); void lis3lv02d_poweron(struct lis3lv02d *lis3) { - lis3_dev.is_on = 1; - lis3_dev.init(lis3); -} -EXPORT_SYMBOL_GPL(lis3lv02d_poweron); + u8 reg; -/* - * To be called before starting to use the device. It makes sure that the - * device will always be on until a call to lis3lv02d_decrease_use(). Not to be - * used from interrupt context. - */ -static void lis3lv02d_increase_use(struct lis3lv02d *dev) -{ - mutex_lock(&dev->lock); - dev->usage++; - if (dev->usage == 1) { - if (!dev->is_on) - lis3lv02d_poweron(dev); - } - mutex_unlock(&dev->lock); -} + lis3->init(lis3); -/* - * To be called whenever a usage of the device is stopped. - * It will make sure to turn off the device when there is not usage. - */ -static void lis3lv02d_decrease_use(struct lis3lv02d *dev) -{ - mutex_lock(&dev->lock); - dev->usage--; - if (dev->usage == 0) - lis3lv02d_poweroff(dev); - mutex_unlock(&dev->lock); + /* + * Common configuration + * BDU: LSB and MSB values are not updated until both have been read. + * So the value read will always be correct. + */ + lis3->read(lis3, CTRL_REG2, ®); + reg |= CTRL2_BDU; + lis3->write(lis3, CTRL_REG2, reg); } +EXPORT_SYMBOL_GPL(lis3lv02d_poweron); + static irqreturn_t lis302dl_interrupt(int irq, void *dummy) { @@ -198,14 +181,12 @@ static int lis3lv02d_misc_open(struct inode *inode, struct file *file) printk(KERN_ERR DRIVER_NAME ": IRQ%d allocation failed\n", lis3_dev.irq); return -EBUSY; } - lis3lv02d_increase_use(&lis3_dev); return 0; } static int lis3lv02d_misc_release(struct inode *inode, struct file *file) { fasync_helper(-1, file, 0, &lis3_dev.async_queue); - lis3lv02d_decrease_use(&lis3_dev); free_irq(lis3_dev.irq, &lis3_dev); clear_bit(0, &lis3_dev.misc_opened); /* release the device */ return 0; @@ -314,10 +295,8 @@ static int lis3lv02d_joystick_kthread(void *data) static int lis3lv02d_joystick_open(struct input_dev *input) { - lis3lv02d_increase_use(&lis3_dev); lis3_dev.kthread = kthread_run(lis3lv02d_joystick_kthread, NULL, "klis3lv02d"); if (IS_ERR(lis3_dev.kthread)) { - lis3lv02d_decrease_use(&lis3_dev); return PTR_ERR(lis3_dev.kthread); } @@ -327,7 +306,6 @@ static int lis3lv02d_joystick_open(struct input_dev *input) static void lis3lv02d_joystick_close(struct input_dev *input) { kthread_stop(lis3_dev.kthread); - lis3lv02d_decrease_use(&lis3_dev); } static inline void lis3lv02d_calibrate_joystick(void) @@ -390,9 +368,7 @@ static ssize_t lis3lv02d_position_show(struct device *dev, { int x, y, z; - lis3lv02d_increase_use(&lis3_dev); lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); - lis3lv02d_decrease_use(&lis3_dev); return sprintf(buf, "(%d,%d,%d)\n", x, y, z); } @@ -406,9 +382,7 @@ static ssize_t lis3lv02d_calibrate_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - lis3lv02d_increase_use(&lis3_dev); lis3lv02d_calibrate_joystick(); - lis3lv02d_decrease_use(&lis3_dev); return count; } @@ -420,9 +394,7 @@ static ssize_t lis3lv02d_rate_show(struct device *dev, u8 ctrl; int val; - lis3lv02d_increase_use(&lis3_dev); lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); - lis3lv02d_decrease_use(&lis3_dev); val = (ctrl & (CTRL1_DF0 | CTRL1_DF1)) >> 4; return sprintf(buf, "%d\n", lis3lv02dl_df_val[val]); } @@ -446,17 +418,17 @@ static struct attribute_group lis3lv02d_attribute_group = { static int lis3lv02d_add_fs(struct lis3lv02d *lis3) { - lis3_dev.pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); - if (IS_ERR(lis3_dev.pdev)) - return PTR_ERR(lis3_dev.pdev); + lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); + if (IS_ERR(lis3->pdev)) + return PTR_ERR(lis3->pdev); - return sysfs_create_group(&lis3_dev.pdev->dev.kobj, &lis3lv02d_attribute_group); + return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); } -int lis3lv02d_remove_fs(void) +int lis3lv02d_remove_fs(struct lis3lv02d *lis3) { - sysfs_remove_group(&lis3_dev.pdev->dev.kobj, &lis3lv02d_attribute_group); - platform_device_unregister(lis3_dev.pdev); + sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); + platform_device_unregister(lis3->pdev); return 0; } EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); @@ -482,13 +454,12 @@ int lis3lv02d_init_device(struct lis3lv02d *dev) break; default: printk(KERN_ERR DRIVER_NAME - ": unknown sensor type 0x%X\n", lis3_dev.whoami); + ": unknown sensor type 0x%X\n", dev->whoami); return -EINVAL; } - mutex_init(&dev->lock); lis3lv02d_add_fs(dev); - lis3lv02d_increase_use(dev); + lis3lv02d_poweron(dev); if (lis3lv02d_joystick_enable()) printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n"); @@ -503,7 +474,6 @@ int lis3lv02d_init_device(struct lis3lv02d *dev) if (misc_register(&lis3lv02d_misc_device)) printk(KERN_ERR DRIVER_NAME ": misc_register failed\n"); out: - lis3lv02d_decrease_use(dev); return 0; } EXPORT_SYMBOL_GPL(lis3lv02d_init_device); |