HWMON: ams - convert to use input-polldev

Switch to using input-polldev skeleton instead of implementing polling
loop by itself.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Michael Hanselmann <linux-kernel@hansmi.ch>

3 files changed, 35 insertions, 47 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index f0ab2acea1bb..99c82b1af8c9 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -131,6 +131,7 @@ config SENSORS_K8TEMP
 config SENSORS_AMS
         tristate "Apple Motion Sensor driver"
         depends on PPC_PMAC && !PPC64 && INPUT && ((ADB_PMU && I2C = y) || (ADB_PMU && !I2C) || I2C) && EXPERIMENTAL
+        select INPUT_POLLDEV
         help
           Support for the motion sensor included in PowerBooks. Includes
           implementations for PMU and I2C.
diff --git a/drivers/hwmon/ams/ams-input.c b/drivers/hwmon/ams/ams-input.c
index ca7095d96ad0..7b81e0c2c2d9 100644
--- a/drivers/hwmon/ams/ams-input.c
+++ b/drivers/hwmon/ams/ams-input.c
@@ -27,47 +27,32 @@ static unsigned int invert;
 module_param(invert, bool, 0644);
 MODULE_PARM_DESC(invert, "Invert input data on X and Y axis");
 
-static int ams_input_kthread(void *data)
+static void ams_idev_poll(struct input_polled_dev *dev)
 {
+        struct input_dev *idev = dev->input;
         s8 x, y, z;
 
-        while (!kthread_should_stop()) {
-                mutex_lock(&ams_info.lock);
-
-                ams_sensors(&x, &y, &z);
-
-                x -= ams_info.xcalib;
-                y -= ams_info.ycalib;
-                z -= ams_info.zcalib;
-
-                input_report_abs(ams_info.idev, ABS_X, invert ? -x : x);
-                input_report_abs(ams_info.idev, ABS_Y, invert ? -y : y);
-                input_report_abs(ams_info.idev, ABS_Z, z);
+        mutex_lock(&ams_info.lock);
 
-                input_sync(ams_info.idev);
+        ams_sensors(&x, &y, &z);
 
-                mutex_unlock(&ams_info.lock);
+        x -= ams_info.xcalib;
+        y -= ams_info.ycalib;
+        z -= ams_info.zcalib;
 
-                msleep(25);
-        }
+        input_report_abs(idev, ABS_X, invert ? -x : x);
+        input_report_abs(idev, ABS_Y, invert ? -y : y);
+        input_report_abs(idev, ABS_Z, z);
 
-        return 0;
-}
+        input_sync(idev);
 
-static int ams_input_open(struct input_dev *dev)
-{
-        ams_info.kthread = kthread_run(ams_input_kthread, NULL, "kams");
-        return IS_ERR(ams_info.kthread) ? PTR_ERR(ams_info.kthread) : 0;
-}
-
-static void ams_input_close(struct input_dev *dev)
-{
-        kthread_stop(ams_info.kthread);
+        mutex_unlock(&ams_info.lock);
 }
 
 /* Call with ams_info.lock held! */
 static void ams_input_enable(void)
 {
+        struct input_dev *input;
         s8 x, y, z;
 
         if (ams_info.idev)
@@ -78,27 +63,29 @@ static void ams_input_enable(void)
         ams_info.ycalib = y;
         ams_info.zcalib = z;
 
-        ams_info.idev = input_allocate_device();
+        ams_info.idev = input_allocate_polled_device();
         if (!ams_info.idev)
                 return;
 
-        ams_info.idev->name = "Apple Motion Sensor";
-        ams_info.idev->id.bustype = ams_info.bustype;
-        ams_info.idev->id.vendor = 0;
-        ams_info.idev->open = ams_input_open;
-        ams_info.idev->close = ams_input_close;
-        ams_info.idev->dev.parent = &ams_info.of_dev->dev;
+        ams_info.idev->poll = ams_idev_poll;
+        ams_info.idev->poll_interval = 25;
+
+        input = ams_info.idev->input;
+        input->name = "Apple Motion Sensor";
+        input->id.bustype = ams_info.bustype;
+        input->id.vendor = 0;
+        input->dev.parent = &ams_info.of_dev->dev;
 
-        input_set_abs_params(ams_info.idev, ABS_X, -50, 50, 3, 0);
-        input_set_abs_params(ams_info.idev, ABS_Y, -50, 50, 3, 0);
-        input_set_abs_params(ams_info.idev, ABS_Z, -50, 50, 3, 0);
+        input_set_abs_params(input, ABS_X, -50, 50, 3, 0);
+        input_set_abs_params(input, ABS_Y, -50, 50, 3, 0);
+        input_set_abs_params(input, ABS_Z, -50, 50, 3, 0);
 
-        set_bit(EV_ABS, ams_info.idev->evbit);
-        set_bit(EV_KEY, ams_info.idev->evbit);
-        set_bit(BTN_TOUCH, ams_info.idev->keybit);
+        set_bit(EV_ABS, input->evbit);
+        set_bit(EV_KEY, input->evbit);
+        set_bit(BTN_TOUCH, input->keybit);
 
-        if (input_register_device(ams_info.idev)) {
-                input_free_device(ams_info.idev);
+        if (input_register_polled_device(ams_info.idev)) {
+                input_free_polled_device(ams_info.idev);
                 ams_info.idev = NULL;
                 return;
         }
@@ -108,7 +95,8 @@ static void ams_input_enable(void)
 static void ams_input_disable(void)
 {
         if (ams_info.idev) {
-                input_unregister_device(ams_info.idev);
+                input_unregister_polled_device(ams_info.idev);
+                input_free_polled_device(ams_info.idev);
                 ams_info.idev = NULL;
         }
 }
diff --git a/drivers/hwmon/ams/ams.h b/drivers/hwmon/ams/ams.h
index 240730e6bcde..a6221e5dd984 100644
--- a/drivers/hwmon/ams/ams.h
+++ b/drivers/hwmon/ams/ams.h
@@ -1,5 +1,5 @@
 #include <linux/i2c.h>
-#include <linux/input.h>
+#include <linux/input-polldev.h>
 #include <linux/kthread.h>
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
@@ -52,8 +52,7 @@ struct ams {
 #endif
 
         /* Joystick emulation */
-        struct task_struct *kthread;
-        struct input_dev *idev;
+        struct input_polled_dev *idev;
         __u16 bustype;
 
         /* calibrated null values */