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Date: Thu, 29 Nov 2018 15:30:54 -0800
From: Guenter Roeck <groeck@...gle.com>
To: Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc: Lee Jones <lee.jones@...aro.org>,
Gwendal Grignou <gwendal@...omium.org>,
Nicolas Boichat <drinkcat@...omium.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
Guenter Roeck <groeck@...omium.org>, kernel@...labora.com,
Benson Leung <bleung@...omium.org>,
Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v3 1/8] mfd / platform: cros_ec: use devm_mfd_add_devices.
On Tue, Nov 27, 2018 at 4:18 AM Enric Balletbo i Serra
<enric.balletbo@...labora.com> wrote:
>
> 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@...labora.com>
Reviewed-by: Guenter Roeck <groeck@...omium.org>
> ---
>
> 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
>
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