mfd: wm831x: Use PM ops for shutdown

This helps move us towards removing the bus custom operations.
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/wm831x-i2c.c

@@ -64,11 +64,13 @@ static int wm831x_i2c_suspend(struct device *dev)
 	return wm831x_device_suspend(wm831x);
 }
 
-static void wm831x_i2c_shutdown(struct i2c_client *i2c)
+static int wm831x_i2c_poweroff(struct device *dev)
 {
-	struct wm831x *wm831x = i2c_get_clientdata(i2c);
+	struct wm831x *wm831x = dev_get_drvdata(dev);
 
 	wm831x_device_shutdown(wm831x);
+
+	return 0;
 }
 
 static const struct i2c_device_id wm831x_i2c_id[] = {
@@ -85,6 +87,7 @@ MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
 
 static const struct dev_pm_ops wm831x_pm_ops = {
 	.suspend = wm831x_i2c_suspend,
+	.poweroff = wm831x_i2c_poweroff,
 };
 
 static struct i2c_driver wm831x_i2c_driver = {
@@ -95,7 +98,6 @@ static struct i2c_driver wm831x_i2c_driver = {
 	},
 	.probe = wm831x_i2c_probe,
 	.remove = wm831x_i2c_remove,
-	.shutdown = wm831x_i2c_shutdown,
 	.id_table = wm831x_i2c_id,
 };
 

drivers/mfd/wm831x-spi.c

@@ -66,16 +66,19 @@ static int wm831x_spi_suspend(struct device *dev)
 	return wm831x_device_suspend(wm831x);
 }
 
-static void wm831x_spi_shutdown(struct spi_device *spi)
+static int wm831x_spi_poweroff(struct device *dev)
 {
-	struct wm831x *wm831x = spi_get_drvdata(spi);
+	struct wm831x *wm831x = dev_get_drvdata(dev);
 
 	wm831x_device_shutdown(wm831x);
+
+	return 0;
 }
 
 static const struct dev_pm_ops wm831x_spi_pm = {
 	.freeze = wm831x_spi_suspend,
 	.suspend = wm831x_spi_suspend,
+	.poweroff = wm831x_spi_poweroff,
 };
 
 static const struct spi_device_id wm831x_spi_ids[] = {
@@ -99,7 +102,6 @@ static struct spi_driver wm831x_spi_driver = {
 	.id_table	= wm831x_spi_ids,
 	.probe		= wm831x_spi_probe,
 	.remove		= wm831x_spi_remove,
-	.shutdown	= wm831x_spi_shutdown,
 };
 
 static int __init wm831x_spi_init(void)