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path: root/drivers/hwmon/lis3lv02d.c
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Diffstat (limited to 'drivers/hwmon/lis3lv02d.c')
-rw-r--r--drivers/hwmon/lis3lv02d.c187
1 files changed, 74 insertions, 113 deletions
diff --git a/drivers/hwmon/lis3lv02d.c b/drivers/hwmon/lis3lv02d.c
index 778eb779598..271338bdb6b 100644
--- a/drivers/hwmon/lis3lv02d.c
+++ b/drivers/hwmon/lis3lv02d.c
@@ -27,9 +27,7 @@
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
-#include <linux/input.h>
-#include <linux/kthread.h>
-#include <linux/semaphore.h>
+#include <linux/input-polldev.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/poll.h>
@@ -105,56 +103,39 @@ 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);
+ reg |= CTRL2_BDU;
+ lis3->write(lis3, CTRL_REG2, reg);
}
+EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
+
static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
{
@@ -198,15 +179,12 @@ 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);
- printk("lis3: registered interrupt %d\n", lis3_dev.irq);
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;
@@ -290,46 +268,16 @@ static struct miscdevice lis3lv02d_misc_device = {
.fops = &lis3lv02d_misc_fops,
};
-/**
- * lis3lv02d_joystick_kthread - Kthread polling function
- * @data: unused - here to conform to threadfn prototype
- */
-static int lis3lv02d_joystick_kthread(void *data)
+static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
{
int x, y, z;
- while (!kthread_should_stop()) {
- lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
- input_report_abs(lis3_dev.idev, ABS_X, x - lis3_dev.xcalib);
- input_report_abs(lis3_dev.idev, ABS_Y, y - lis3_dev.ycalib);
- input_report_abs(lis3_dev.idev, ABS_Z, z - lis3_dev.zcalib);
-
- input_sync(lis3_dev.idev);
-
- try_to_freeze();
- msleep_interruptible(MDPS_POLL_INTERVAL);
- }
-
- return 0;
-}
-
-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);
- }
-
- return 0;
+ lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
+ input_report_abs(pidev->input, ABS_X, x - lis3_dev.xcalib);
+ input_report_abs(pidev->input, ABS_Y, y - lis3_dev.ycalib);
+ input_report_abs(pidev->input, ABS_Z, z - lis3_dev.zcalib);
}
-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)
{
@@ -339,33 +287,36 @@ static inline void lis3lv02d_calibrate_joystick(void)
int lis3lv02d_joystick_enable(void)
{
+ struct input_dev *input_dev;
int err;
if (lis3_dev.idev)
return -EINVAL;
- lis3_dev.idev = input_allocate_device();
+ lis3_dev.idev = input_allocate_polled_device();
if (!lis3_dev.idev)
return -ENOMEM;
+ lis3_dev.idev->poll = lis3lv02d_joystick_poll;
+ lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
+ input_dev = lis3_dev.idev->input;
+
lis3lv02d_calibrate_joystick();
- lis3_dev.idev->name = "ST LIS3LV02DL Accelerometer";
- lis3_dev.idev->phys = DRIVER_NAME "/input0";
- lis3_dev.idev->id.bustype = BUS_HOST;
- lis3_dev.idev->id.vendor = 0;
- lis3_dev.idev->dev.parent = &lis3_dev.pdev->dev;
- lis3_dev.idev->open = lis3lv02d_joystick_open;
- lis3_dev.idev->close = lis3lv02d_joystick_close;
+ input_dev->name = "ST LIS3LV02DL Accelerometer";
+ input_dev->phys = DRIVER_NAME "/input0";
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->id.vendor = 0;
+ input_dev->dev.parent = &lis3_dev.pdev->dev;
- set_bit(EV_ABS, lis3_dev.idev->evbit);
- input_set_abs_params(lis3_dev.idev, ABS_X, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
- input_set_abs_params(lis3_dev.idev, ABS_Y, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
- input_set_abs_params(lis3_dev.idev, ABS_Z, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
+ set_bit(EV_ABS, input_dev->evbit);
+ input_set_abs_params(input_dev, ABS_X, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
+ input_set_abs_params(input_dev, ABS_Y, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
+ input_set_abs_params(input_dev, ABS_Z, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
- err = input_register_device(lis3_dev.idev);
+ err = input_register_polled_device(lis3_dev.idev);
if (err) {
- input_free_device(lis3_dev.idev);
+ input_free_polled_device(lis3_dev.idev);
lis3_dev.idev = NULL;
}
@@ -378,8 +329,9 @@ void lis3lv02d_joystick_disable(void)
if (!lis3_dev.idev)
return;
- misc_deregister(&lis3lv02d_misc_device);
- input_unregister_device(lis3_dev.idev);
+ if (lis3_dev.irq)
+ misc_deregister(&lis3lv02d_misc_device);
+ input_unregister_polled_device(lis3_dev.idev);
lis3_dev.idev = NULL;
}
EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
@@ -390,9 +342,7 @@ 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 +356,7 @@ 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 +368,7 @@ 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 +392,17 @@ 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);
@@ -482,18 +428,35 @@ 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");
- printk("lis3_init_device: irq %d\n", dev->irq);
+ /* passing in platform specific data is purely optional and only
+ * used by the SPI transport layer at the moment */
+ if (dev->pdata) {
+ struct lis3lv02d_platform_data *p = dev->pdata;
+
+ if (p->click_flags && (dev->whoami == LIS_SINGLE_ID)) {
+ dev->write(dev, CLICK_CFG, p->click_flags);
+ dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit);
+ dev->write(dev, CLICK_LATENCY, p->click_latency);
+ dev->write(dev, CLICK_WINDOW, p->click_window);
+ dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf);
+ dev->write(dev, CLICK_THSY_X,
+ (p->click_thresh_x & 0xf) |
+ (p->click_thresh_y << 4));
+ }
+
+ if (p->irq_cfg)
+ dev->write(dev, CTRL_REG3, p->irq_cfg);
+ }
/* bail if we did not get an IRQ from the bus layer */
if (!dev->irq) {
@@ -502,11 +465,9 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
goto out;
}
- printk("lis3: registering device\n");
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);