linux-kernel - Re: [PATCH 8/8] One Laptop Per Child power/battery driver

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Message-ID: <20070507140453.GD3868@ucw.cz>
Date:	Mon, 7 May 2007 14:04:54 +0000
From:	Pavel Machek <pavel@....cz>
To:	Anton Vorontsov <cbou@...l.ru>
Cc:	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	kernel-discuss@...dhelds.org, David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH 8/8] One Laptop Per Child power/battery driver

Hi!

> This probably should be marked as BROKEN because, according
> to David Woodhouse, EC-acccess method will change. Plus currently
> it lacks mutexes. So this driver is just for reference. Converted
> from the battery-2.6 repository, 1:1.
> 
> But nevertheless it should work.
> 
> Signed-off-by: Anton Vorontsov <cbou@...l.ru>
> ---
>  drivers/power/Kconfig        |    6 +
>  drivers/power/Makefile       |    1 +
>  drivers/power/olpc_battery.c |  300 ++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 307 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/power/olpc_battery.c
> 
> diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
> index 051724f..3ac79c3 100644
> --- a/drivers/power/Kconfig
> +++ b/drivers/power/Kconfig
> @@ -42,4 +42,10 @@ config BATTERY_PMU
>  	  Say Y here to expose battery information on Apple machines
>  	  through the generic battery class.
>  
> +config BATTERY_OLPC
> +	tristate "One Laptop Per Child battery"
> +	depends on X86_32
> +	help
> +	  Say Y to enable support for the battery on the $100 laptop.
> +
>  endif # POWER_SUPPLY
> diff --git a/drivers/power/Makefile b/drivers/power/Makefile
> index 0ebdc6d..62b58ca 100644
> --- a/drivers/power/Makefile
> +++ b/drivers/power/Makefile
> @@ -19,3 +19,4 @@ obj-$(CONFIG_APM_POWER)            += apm_power.o
>  
>  obj-$(CONFIG_BATTERY_DS2760)       += ds2760_battery.o
>  obj-$(CONFIG_BATTERY_PMU)          += pmu_battery.o
> +obj-$(CONFIG_BATTERY_OLPC)         += olpc_battery.o
> diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
> new file mode 100644
> index 0000000..40f76bb
> --- /dev/null
> +++ b/drivers/power/olpc_battery.c
> @@ -0,0 +1,300 @@
> +/*
> + * Battery driver for One Laptop Per Child ($100 laptop) board.
> + *
> + *	Copyright ?? 2006  David Woodhouse <dwmw2@...radead.org>

Can we stick to ascii in sources?

> +#define wBAT_VOLTAGE     0xf900  /* *9.76/32,    mV   */
> +#define wBAT_CURRENT     0xf902  /* *15.625/120, mA   */
> +#define wBAT_TEMP        0xf906  /* *256/1000,   ??C  */
> +#define wAMB_TEMP        0xf908  /* *256/1000,   ??C  */

Ascii? And those defines seem affected by hungarian convention.


> +#define sMBAT_STATUS     0xfaa4
> +#define	sBAT_PRESENT          1
> +#define	sBAT_FULL             2
> +#define	sBAT_DESTROY          4  /* what is this exactly? */
> +#define	sBAT_LOW             32
> +#define	sBAT_DISCHG          64
> +#define sMCHARGE_STATUS  0xfaa5
> +#define	sBAT_CHARGE           1
> +#define	sBAT_OVERTEMP         4
> +#define	sBAT_NiMH             8
> +#define sPOWER_FLAG      0xfa40


							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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