Input: adxl34 - make enable/disable separate from suspend/resume

Suspending and resuming the device should be separate from enabling
and disabling it through sysfs attribute and thus should not alter
ac->disabled flag.

[michael.hennerich@analog.com: various fixups]
Tested-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

4 files changed, 70 insertions, 48 deletions

diff --git a/drivers/input/misc/adxl34x-i2c.c b/drivers/input/misc/adxl34x-i2c.c
index 76194b5..0779724 100644
--- a/drivers/input/misc/adxl34x-i2c.c
+++ b/drivers/input/misc/adxl34x-i2c.c
@@ -58,14 +58,14 @@ static int adxl34x_i2c_read_block(struct device *dev,
 	return 0;
 }
 
-static const struct adxl34x_bus_ops adx134x_smbus_bops = {
+static const struct adxl34x_bus_ops adxl34x_smbus_bops = {
 	.bustype	= BUS_I2C,
 	.write		= adxl34x_smbus_write,
 	.read		= adxl34x_smbus_read,
 	.read_block	= adxl34x_smbus_read_block,
 };
 
-static const struct adxl34x_bus_ops adx134x_i2c_bops = {
+static const struct adxl34x_bus_ops adxl34x_i2c_bops = {
 	.bustype	= BUS_I2C,
 	.write		= adxl34x_smbus_write,
 	.read		= adxl34x_smbus_read,
@@ -88,7 +88,7 @@ static int __devinit adxl34x_i2c_probe(struct i2c_client *client,
 	ac = adxl34x_probe(&client->dev, client->irq, false,
 			   i2c_check_functionality(client->adapter,
 						   I2C_FUNC_SMBUS_READ_I2C_BLOCK) ?
-				&adx134x_smbus_bops : &adx134x_i2c_bops);
+				&adxl34x_smbus_bops : &adxl34x_i2c_bops);
 	if (IS_ERR(ac))
 		return PTR_ERR(ac);
 
@@ -105,26 +105,26 @@ static int __devexit adxl34x_i2c_remove(struct i2c_client *client)
 }
 
 #ifdef CONFIG_PM
-static int adxl34x_suspend(struct i2c_client *client, pm_message_t message)
+static int adxl34x_i2c_suspend(struct i2c_client *client, pm_message_t message)
 {
 	struct adxl34x *ac = i2c_get_clientdata(client);
 
-	adxl34x_disable(ac);
+	adxl34x_suspend(ac);
 
 	return 0;
 }
 
-static int adxl34x_resume(struct i2c_client *client)
+static int adxl34x_i2c_resume(struct i2c_client *client)
 {
 	struct adxl34x *ac = i2c_get_clientdata(client);
 
-	adxl34x_enable(ac);
+	adxl34x_resume(ac);
 
 	return 0;
 }
 #else
-# define adxl34x_suspend NULL
-# define adxl34x_resume  NULL
+# define adxl34x_i2c_suspend NULL
+# define adxl34x_i2c_resume  NULL
 #endif
 
 static const struct i2c_device_id adxl34x_id[] = {
@@ -141,8 +141,8 @@ static struct i2c_driver adxl34x_driver = {
 	},
 	.probe    = adxl34x_i2c_probe,
 	.remove   = __devexit_p(adxl34x_i2c_remove),
-	.suspend  = adxl34x_suspend,
-	.resume   = adxl34x_resume,
+	.suspend  = adxl34x_i2c_suspend,
+	.resume   = adxl34x_i2c_resume,
 	.id_table = adxl34x_id,
 };
 
diff --git a/drivers/input/misc/adxl34x-spi.c b/drivers/input/misc/adxl34x-spi.c
index 7f99235..782de9e 100644
--- a/drivers/input/misc/adxl34x-spi.c
+++ b/drivers/input/misc/adxl34x-spi.c
@@ -94,26 +94,26 @@ static int __devexit adxl34x_spi_remove(struct spi_device *spi)
 }
 
 #ifdef CONFIG_PM
-static int adxl34x_suspend(struct spi_device *spi, pm_message_t message)
+static int adxl34x_spi_suspend(struct spi_device *spi, pm_message_t message)
 {
 	struct adxl34x *ac = dev_get_drvdata(&spi->dev);
 
-	adxl34x_disable(ac);
+	adxl34x_suspend(ac);
 
 	return 0;
 }
 
-static int adxl34x_resume(struct spi_device *spi)
+static int adxl34x_spi_resume(struct spi_device *spi)
 {
 	struct adxl34x *ac = dev_get_drvdata(&spi->dev);
 
-	adxl34x_enable(ac);
+	adxl34x_resume(ac);
 
 	return 0;
 }
 #else
-# define adxl34x_suspend NULL
-# define adxl34x_resume  NULL
+# define adxl34x_spi_suspend NULL
+# define adxl34x_spi_resume  NULL
 #endif
 
 static struct spi_driver adxl34x_driver = {
@@ -124,8 +124,8 @@ static struct spi_driver adxl34x_driver = {
 	},
 	.probe   = adxl34x_spi_probe,
 	.remove  = __devexit_p(adxl34x_spi_remove),
-	.suspend = adxl34x_suspend,
-	.resume  = adxl34x_resume,
+	.suspend = adxl34x_spi_suspend,
+	.resume  = adxl34x_spi_resume,
 };
 
 static int __init adxl34x_spi_init(void)
diff --git a/drivers/input/misc/adxl34x.c b/drivers/input/misc/adxl34x.c
index 77fb409..bb9c10f 100644
--- a/drivers/input/misc/adxl34x.c
+++ b/drivers/input/misc/adxl34x.c
@@ -200,6 +200,7 @@ struct adxl34x {
 	unsigned orient3d_saved;
 	bool disabled;	/* P: mutex */
 	bool opened;	/* P: mutex */
+	bool suspended;	/* P: mutex */
 	bool fifo_delay;
 	int irq;
 	unsigned model;
@@ -399,41 +400,44 @@ static irqreturn_t adxl34x_irq(int irq, void *handle)
 
 static void __adxl34x_disable(struct adxl34x *ac)
 {
-	if (!ac->disabled && ac->opened) {
-		/*
-		 * A '0' places the ADXL34x into standby mode
-		 * with minimum power consumption.
-		 */
-		AC_WRITE(ac, POWER_CTL, 0);
-
-		ac->disabled = true;
-	}
+	/*
+	 * A '0' places the ADXL34x into standby mode
+	 * with minimum power consumption.
+	 */
+	AC_WRITE(ac, POWER_CTL, 0);
 }
 
 static void __adxl34x_enable(struct adxl34x *ac)
 {
-	if (ac->disabled && ac->opened) {
-		AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE);
-		ac->disabled = false;
-	}
+	AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE);
 }
 
-void adxl34x_disable(struct adxl34x *ac)
+void adxl34x_suspend(struct adxl34x *ac)
 {
 	mutex_lock(&ac->mutex);
-	__adxl34x_disable(ac);
+
+	if (!ac->suspended && !ac->disabled && ac->opened)
+		__adxl34x_disable(ac);
+
+	ac->suspended = true;
+
 	mutex_unlock(&ac->mutex);
 }
-EXPORT_SYMBOL_GPL(adxl34x_disable);
+EXPORT_SYMBOL_GPL(adxl34x_suspend);
 
-void adxl34x_enable(struct adxl34x *ac)
+void adxl34x_resume(struct adxl34x *ac)
 {
 	mutex_lock(&ac->mutex);
-	__adxl34x_enable(ac);
+
+	if (ac->suspended && !ac->disabled && ac->opened)
+		__adxl34x_enable(ac);
+
+	ac->suspended= false;
+
 	mutex_unlock(&ac->mutex);
 }
 
-EXPORT_SYMBOL_GPL(adxl34x_enable);
+EXPORT_SYMBOL_GPL(adxl34x_resume);
 
 static ssize_t adxl34x_disable_show(struct device *dev,
 				    struct device_attribute *attr, char *buf)
@@ -455,10 +459,21 @@ static ssize_t adxl34x_disable_store(struct device *dev,
 	if (error)
 		return error;
 
-	if (val)
-		adxl34x_disable(ac);
-	else
-		adxl34x_enable(ac);
+	mutex_lock(&ac->mutex);
+
+	if (!ac->suspended && ac->opened) {
+		if (val) {
+			if (!ac->disabled)
+				__adxl34x_disable(ac);
+		} else {
+			if (ac->disabled)
+				__adxl34x_enable(ac);
+		}
+	}
+
+	ac->disabled = !!val;
+
+	mutex_unlock(&ac->mutex);
 
 	return count;
 }
@@ -575,7 +590,7 @@ static ssize_t adxl34x_autosleep_store(struct device *dev,
 	else
 		ac->pdata.power_mode &= ~(PCTL_AUTO_SLEEP | PCTL_LINK);
 
-	if (!ac->disabled && ac->opened)
+	if (!ac->disabled && !ac->suspended && ac->opened)
 		AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE);
 
 	mutex_unlock(&ac->mutex);
@@ -649,8 +664,12 @@ static int adxl34x_input_open(struct input_dev *input)
 	struct adxl34x *ac = input_get_drvdata(input);
 
 	mutex_lock(&ac->mutex);
+
+	if (!ac->suspended && !ac->disabled)
+		__adxl34x_enable(ac);
+
 	ac->opened = true;
-	__adxl34x_enable(ac);
+
 	mutex_unlock(&ac->mutex);
 
 	return 0;
@@ -661,8 +680,12 @@ static void adxl34x_input_close(struct input_dev *input)
 	struct adxl34x *ac = input_get_drvdata(input);
 
 	mutex_lock(&ac->mutex);
-	__adxl34x_disable(ac);
+
+	if (!ac->suspended && !ac->disabled)
+		__adxl34x_disable(ac);
+
 	ac->opened = false;
+
 	mutex_unlock(&ac->mutex);
 }
 
@@ -878,7 +901,6 @@ EXPORT_SYMBOL_GPL(adxl34x_probe);
 
 int adxl34x_remove(struct adxl34x *ac)
 {
-	adxl34x_disable(ac);
 	sysfs_remove_group(&ac->dev->kobj, &adxl34x_attr_group);
 	free_irq(ac->irq, ac);
 	input_unregister_device(ac->input);
diff --git a/drivers/input/misc/adxl34x.h b/drivers/input/misc/adxl34x.h
index ea9093c..bbbc80f 100644
--- a/drivers/input/misc/adxl34x.h
+++ b/drivers/input/misc/adxl34x.h
@@ -20,8 +20,8 @@ struct adxl34x_bus_ops {
 	int (*write)(struct device *, unsigned char, unsigned char);
 };
 
-void adxl34x_disable(struct adxl34x *ac);
-void adxl34x_enable(struct adxl34x *ac);
+void adxl34x_suspend(struct adxl34x *ac);
+void adxl34x_resume(struct adxl34x *ac);
 struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 			      bool fifo_delay_default,
 			      const struct adxl34x_bus_ops *bops);