Date: Mon, 18 Jan 2010 15:19:51 +0100
From: Samuel Ortiz <sameo@linux.intel.com>
To: Christoph Egger <siccegge@stud.informatik.uni-erlangen.de>
Cc: linux-kernel@vger.kernel.org, Reinhard.Tartler@informatik.uni-erlangen.de
Subject: Re: [PATCH] obsolete config in kernel source (TWL4030_BCI_BATTERY)
Message-ID: <20100118141950.GF8036@sortiz.org>
References: <20100115144347.GA3921@faui49.informatik.uni-erlangen.de>
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Hi Christoph,

On Fri, Jan 15, 2010 at 03:43:48PM +0100, Christoph Egger wrote:
> Hi all!
> 
> 	As part of the VAMOS[0] research project at the University of
> Erlangen we're checking referential integrity between kernel KConfig
> options and in-code Conditional blocks.
> 
> 	The in-code config option CONFIG_TWL4030_BCI_BATTERY seems to
> originate from the omap project[1]. However some variant of that patch
> was rejected from mainline inclusion (sorry no links at hand right
> now) and the functionality seems to get implemented under another name
> [2] so this config option is probably dead.
> 
> 	Please keep me informed of this patch getting confirmed /
> merged so we can keep track of it.
Patch applied to the mfd tree, thanks a lot.

Cheers,
Samuel.


> Regards
> 
> 	Christoph Egger
> 
> [0] http://vamos1.informatik.uni-erlangen.de/
> [1] http://linux.omap.com/pub/kernel/3430sdp/patches-applicable-over-linux-omap-2.6.git/twl4030_bci_battery_20080305.patch
> [2] http://lwn.net/Articles/364310/

> From 85b4ae895062f4980b35f9868589f361702cfaba Mon Sep 17 00:00:00 2001
> From: Christoph Egger <siccegge@stud.informatik.uni-erlangen.de>
> Date: Fri, 15 Jan 2010 15:33:46 +0100
> Subject: [PATCH] remove leftover from discontinued TWL4030 battery patch
> 
> The TWL4030_BCI_BATTERY config option originates from a patch to the
> omap git tree. However inclusion in linux was seemingly rejected and
> the functionality nears inclusion under a different name so this
> removes the bits of the old version that made it into the mainline
> kernel again.
> 
> Signed-off-by: Christoph Egger <siccegge@stud.informatik.uni-erlangen.de>
> ---
>  drivers/mfd/twl-core.c  |   19 -------------------
>  include/linux/i2c/twl.h |    7 +------
>  2 files changed, 1 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
> index aeaeac4..f5f5e17 100644
> --- a/drivers/mfd/twl-core.c
> +++ b/drivers/mfd/twl-core.c
> @@ -58,13 +58,6 @@
>  
>  #define DRIVER_NAME			"twl"
>  
> -#if defined(CONFIG_TWL4030_BCI_BATTERY) || \
> -	defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
> -#define twl_has_bci()		true
> -#else
> -#define twl_has_bci()		false
> -#endif
> -
>  #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
>  #define twl_has_keypad()	true
>  #else
> @@ -587,18 +580,6 @@ add_children(struct twl4030_platform_data *pdata, unsigned long features)
>  	struct device	*child;
>  	unsigned sub_chip_id;
>  
> -	if (twl_has_bci() && pdata->bci &&
> -	    !(features & (TPS_SUBSET | TWL5031))) {
> -		child = add_child(3, "twl4030_bci",
> -				pdata->bci, sizeof(*pdata->bci),
> -				false,
> -				/* irq0 = CHG_PRES, irq1 = BCI */
> -				pdata->irq_base + BCI_PRES_INTR_OFFSET,
> -				pdata->irq_base + BCI_INTR_OFFSET);
> -		if (IS_ERR(child))
> -			return PTR_ERR(child);
> -	}
> -
>  	if (twl_has_gpio() && pdata->gpio) {
>  		child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
>  				pdata->gpio, sizeof(*pdata->gpio),
> diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
> index bf1c5be..32172dc 100644
> --- a/include/linux/i2c/twl.h
> +++ b/include/linux/i2c/twl.h
> @@ -601,12 +601,7 @@ int twl4030_sih_setup(int module);
>  #define TWL4030_VAUX3_DEV_GRP		0x1F
>  #define TWL4030_VAUX3_DEDICATED		0x22
>  
> -#if defined(CONFIG_TWL4030_BCI_BATTERY) || \
> -	defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
> -	extern int twl4030charger_usb_en(int enable);
> -#else
> -	static inline int twl4030charger_usb_en(int enable) { return 0; }
> -#endif
> +static inline int twl4030charger_usb_en(int enable) { return 0; }
>  
>  /*----------------------------------------------------------------------*/
>  
> -- 
> 1.6.3.3
> 


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