[PATCH v3 1/8] mfd / platform: cros_ec: use devm_mfd_add_devices.

[Enric Balletbo i Serra]

Use devm_mfd_add_devices() for adding cros-ec core MFD child devices. This
reduces the need of remove callback from platform/chrome for removing the
MFD child devices.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
---

Changes in v3:
- Removed cros_ec_remove from include file.

Changes in v2:
- Use devm only for the cros-ec core.

 drivers/mfd/cros_ec.c                 | 14 +++-----------
 drivers/mfd/cros_ec_dev.c             |  1 +
 drivers/platform/chrome/cros_ec_i2c.c | 10 ----------
 drivers/platform/chrome/cros_ec_lpc.c |  4 ----
 drivers/platform/chrome/cros_ec_spi.c | 11 -----------
 include/linux/mfd/cros_ec.h           | 10 ----------
 6 files changed, 4 insertions(+), 46 deletions(-)

diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index fe6f83766144..6acfe036d522 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -129,8 +129,8 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 		}
 	}
 
-	err = mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO, &ec_cell, 1,
-			      NULL, ec_dev->irq, NULL);
+	err = devm_mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO, &ec_cell,
+				   1, NULL, ec_dev->irq, NULL);
 	if (err) {
 		dev_err(dev,
 			"Failed to register Embedded Controller subdevice %d\n",
@@ -147,7 +147,7 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 		 * - the EC is responsive at init time (it is not true for a
 		 *   sensor hub.
 		 */
-		err = mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO,
+		err = devm_mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO,
 				      &ec_pd_cell, 1, NULL, ec_dev->irq, NULL);
 		if (err) {
 			dev_err(dev,
@@ -181,14 +181,6 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 }
 EXPORT_SYMBOL(cros_ec_register);
 
-int cros_ec_remove(struct cros_ec_device *ec_dev)
-{
-	mfd_remove_devices(ec_dev->dev);
-
-	return 0;
-}
-EXPORT_SYMBOL(cros_ec_remove);
-
 #ifdef CONFIG_PM_SLEEP
 int cros_ec_suspend(struct cros_ec_device *ec_dev)
 {
diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index 8f9d6964173e..ff788d3e6d5f 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -493,6 +493,7 @@ static int ec_device_remove(struct platform_device *pdev)
 
 	cros_ec_debugfs_remove(ec);
 
+	mfd_remove_devices(ec->dev);
 	cdev_del(&ec->cdev);
 	device_unregister(&ec->class_dev);
 	return 0;
diff --git a/drivers/platform/chrome/cros_ec_i2c.c b/drivers/platform/chrome/cros_ec_i2c.c
index ef9b4763356f..9a009eaa4ada 100644
--- a/drivers/platform/chrome/cros_ec_i2c.c
+++ b/drivers/platform/chrome/cros_ec_i2c.c
@@ -317,15 +317,6 @@ static int cros_ec_i2c_probe(struct i2c_client *client,
 	return 0;
 }
 
-static int cros_ec_i2c_remove(struct i2c_client *client)
-{
-	struct cros_ec_device *ec_dev = i2c_get_clientdata(client);
-
-	cros_ec_remove(ec_dev);
-
-	return 0;
-}
-
 #ifdef CONFIG_PM_SLEEP
 static int cros_ec_i2c_suspend(struct device *dev)
 {
@@ -376,7 +367,6 @@ static struct i2c_driver cros_ec_driver = {
 		.pm	= &cros_ec_i2c_pm_ops,
 	},
 	.probe		= cros_ec_i2c_probe,
-	.remove		= cros_ec_i2c_remove,
 	.id_table	= cros_ec_i2c_id,
 };
 
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index e1b75775cd4a..14684a56e40f 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -327,7 +327,6 @@ static int cros_ec_lpc_probe(struct platform_device *pdev)
 
 static int cros_ec_lpc_remove(struct platform_device *pdev)
 {
-	struct cros_ec_device *ec_dev;
 	struct acpi_device *adev;
 
 	adev = ACPI_COMPANION(&pdev->dev);
@@ -335,9 +334,6 @@ static int cros_ec_lpc_remove(struct platform_device *pdev)
 		acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY,
 					   cros_ec_lpc_acpi_notify);
 
-	ec_dev = platform_get_drvdata(pdev);
-	cros_ec_remove(ec_dev);
-
 	return 0;
 }
 
diff --git a/drivers/platform/chrome/cros_ec_spi.c b/drivers/platform/chrome/cros_ec_spi.c
index 2060d1483043..6cfbc2835beb 100644
--- a/drivers/platform/chrome/cros_ec_spi.c
+++ b/drivers/platform/chrome/cros_ec_spi.c
@@ -685,16 +685,6 @@ static int cros_ec_spi_probe(struct spi_device *spi)
 	return 0;
 }
 
-static int cros_ec_spi_remove(struct spi_device *spi)
-{
-	struct cros_ec_device *ec_dev;
-
-	ec_dev = spi_get_drvdata(spi);
-	cros_ec_remove(ec_dev);
-
-	return 0;
-}
-
 #ifdef CONFIG_PM_SLEEP
 static int cros_ec_spi_suspend(struct device *dev)
 {
@@ -733,7 +723,6 @@ static struct spi_driver cros_ec_driver_spi = {
 		.pm	= &cros_ec_spi_pm_ops,
 	},
 	.probe		= cros_ec_spi_probe,
-	.remove		= cros_ec_spi_remove,
 	.id_table	= cros_ec_spi_id,
 };
 
diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index e44e3ec8a9c7..706dd724de52 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -281,16 +281,6 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
 int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
 			    struct cros_ec_command *msg);
 
-/**
- * cros_ec_remove() - Remove a ChromeOS EC.
- * @ec_dev: Device to register.
- *
- * Call this to deregister a ChromeOS EC, then clean up any private data.
- *
- * Return: 0 on success or negative error code.
- */
-int cros_ec_remove(struct cros_ec_device *ec_dev);
-
 /**
  * cros_ec_register() - Register a new ChromeOS EC, using the provided info.
  * @ec_dev: Device to register.
-- 
2.19.1