linux-kernel - Re: [PATCH 1/2] mfd: max77693: Allow building as a module

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Date:	Thu, 7 Apr 2016 14:29:47 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Chanwoo Choi <cw00.choi@...sung.com>,
	Arnd Bergmann <arnd@...db.de>,
	Javier Martinez Canillas <javier@....samsung.com>,
	Kukjin Kim <kgene@...nel.org>, Olof Johansson <olof@...om.net>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	Kevin Hilman <khilman@...nel.org>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: Re: [PATCH 1/2] mfd: max77693: Allow building as a module

On Mon, 04 Apr 2016, Krzysztof Kozlowski wrote:

> The consumer of max77693 regulators on Trats2 board (samsung-usb2-phy
> driver) supports deferred probing so the max77693 main MFD driver can be
> built now as a module. This gives more flexibility and removes manual
> ordering of init calls.
> 
> Suggested-by: Paul Gortmaker <paul.gortmaker@...driver.com>
> Cc: Paul Gortmaker <paul.gortmaker@...driver.com>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> ---
>  drivers/mfd/Kconfig    |  4 ++--
>  drivers/mfd/max77693.c | 14 ++------------
>  2 files changed, 4 insertions(+), 14 deletions(-)

I assume this can be taken immediately and doesn't depend on anything
external to the set?

For my own reference:
  Acked-by: Lee Jones <lee.jones@...aro.org>

> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index eea61e349e26..aa1e7c3f82ee 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -543,8 +543,8 @@ config MFD_MAX77686
>  	  of the device.
>  
>  config MFD_MAX77693
> -	bool "Maxim Semiconductor MAX77693 PMIC Support"
> -	depends on I2C=y
> +	tristate "Maxim Semiconductor MAX77693 PMIC Support"
> +	depends on I2C
>  	select MFD_CORE
>  	select REGMAP_I2C
>  	select REGMAP_IRQ
> diff --git a/drivers/mfd/max77693.c b/drivers/mfd/max77693.c
> index b83b7a7da1ae..78e501feb96c 100644
> --- a/drivers/mfd/max77693.c
> +++ b/drivers/mfd/max77693.c
> @@ -368,6 +368,7 @@ static const struct of_device_id max77693_dt_match[] = {
>  	{ .compatible = "maxim,max77693" },
>  	{},
>  };
> +MODULE_DEVICE_TABLE(of, max77693_dt_match);
>  #endif
>  
>  static struct i2c_driver max77693_i2c_driver = {
> @@ -381,18 +382,7 @@ static struct i2c_driver max77693_i2c_driver = {
>  	.id_table = max77693_i2c_id,
>  };
>  
> -static int __init max77693_i2c_init(void)
> -{
> -	return i2c_add_driver(&max77693_i2c_driver);
> -}
> -/* init early so consumer devices can complete system boot */
> -subsys_initcall(max77693_i2c_init);
> -
> -static void __exit max77693_i2c_exit(void)
> -{
> -	i2c_del_driver(&max77693_i2c_driver);
> -}
> -module_exit(max77693_i2c_exit);
> +module_i2c_driver(max77693_i2c_driver);
>  
>  MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
>  MODULE_AUTHOR("SangYoung, Son <hello.son@...sung.com>");

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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