linux-kernel - Re: [PATCH 7/8] eeepc-laptop: document fan

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Date:	Mon, 27 Oct 2014 22:31:40 -0700
From:	Darren Hart <dvhart@...radead.org>
To:	Frans Klaver <fransklaver@...il.com>
Cc:	Corentin Chary <corentin.chary@...il.com>,
	acpi4asus-user@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/8] eeepc-laptop: document fan_pwm conversions

On Wed, Oct 22, 2014 at 09:12:42PM +0200, Frans Klaver wrote:
> eeepc_get_fan_pwm and eeepc_set_fan_pwm convert the PWM value read from
> the fan to a range lmsensors understands. Unfortunately this is only
> clear if you are familiar with how lmsensors handles duty cycles.
> 
> Introduce two conversion functions that document the goal of these
> conversions.
> 
> Signed-off-by: Frans Klaver <fransklaver@...il.com>
> ---
>  drivers/platform/x86/eeepc-laptop.c | 16 +++++++++++++---
>  1 file changed, 13 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
> index f820bb3..275a239 100644
> --- a/drivers/platform/x86/eeepc-laptop.c
> +++ b/drivers/platform/x86/eeepc-laptop.c
> @@ -974,18 +974,28 @@ static struct platform_driver platform_driver = {
>  #define EEEPC_EC_SFB0      0xD0
>  #define EEEPC_EC_FAN_CTRL  (EEEPC_EC_SFB0 + 3) /* Byte containing SF25  */
>  
> +static inline int eeepc_pwm_to_lmsensors(int value)
> +{
> +	return value * 255 / 100;
> +}
> +
> +static inline int eeepc_lmsensors_to_pwm(int value)
> +{
> +	value = clamp_val(value, 0, 255);
> +	return value * 100 / 255;

Says the guy cleaning up all the magic numbers.... ;-)

But yeah, this is fine IMO. Applied.

-- 
Darren Hart
Intel Open Source Technology Center
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