[PATCH] mfd: sec: initialize driver via module_platform_driver

[PATCH] mfd: sec: initialize driver via module_platform_driver

[Krzysztof Kozlowski]

The driver was using subsys_initcall() because in old times deferred
probe was not supported everywhere and specific ordering was needed.
Since probe deferral works fine and specific ordering is discouraged
(hides dependencies between drivers and couples their boot order), the
driver can be converted to regular module_platform_driver.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 drivers/mfd/sec-core.c | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
index 95473ff9bb4b..8d55992da19e 100644
--- a/drivers/mfd/sec-core.c
+++ b/drivers/mfd/sec-core.c
@@ -549,19 +549,7 @@ static struct i2c_driver sec_pmic_driver = {
 	.shutdown = sec_pmic_shutdown,
 	.id_table = sec_pmic_id,
 };
-
-static int __init sec_pmic_init(void)
-{
-	return i2c_add_driver(&sec_pmic_driver);
-}
-
-subsys_initcall(sec_pmic_init);
-
-static void __exit sec_pmic_exit(void)
-{
-	i2c_del_driver(&sec_pmic_driver);
-}
-module_exit(sec_pmic_exit);
+module_i2c_driver(sec_pmic_driver);
 
 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 MODULE_DESCRIPTION("Core support for the S5M MFD");
-- 
2.17.1

Re: [PATCH] mfd: sec: initialize driver via module_platform_driver

[Marek Szyprowski]

Hi Krzysztof,

On 21.09.2020 22:34, Krzysztof Kozlowski wrote:
> The driver was using subsys_initcall() because in old times deferred
> probe was not supported everywhere and specific ordering was needed.
> Since probe deferral works fine and specific ordering is discouraged
> (hides dependencies between drivers and couples their boot order), the
> driver can be converted to regular module_platform_driver.
>
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>   drivers/mfd/sec-core.c | 14 +-------------
>   1 file changed, 1 insertion(+), 13 deletions(-)
>
> diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
> index 95473ff9bb4b..8d55992da19e 100644
> --- a/drivers/mfd/sec-core.c
> +++ b/drivers/mfd/sec-core.c
> @@ -549,19 +549,7 @@ static struct i2c_driver sec_pmic_driver = {
>   	.shutdown = sec_pmic_shutdown,
>   	.id_table = sec_pmic_id,
>   };
> -
> -static int __init sec_pmic_init(void)
> -{
> -	return i2c_add_driver(&sec_pmic_driver);
> -}
> -
> -subsys_initcall(sec_pmic_init);
> -
> -static void __exit sec_pmic_exit(void)
> -{
> -	i2c_del_driver(&sec_pmic_driver);
> -}
> -module_exit(sec_pmic_exit);
> +module_i2c_driver(sec_pmic_driver);
>   
>   MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
>   MODULE_DESCRIPTION("Core support for the S5M MFD");

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland