linux-kernel - Re: [PATCH v2] thermal: Make it simpler to use the thermal layer inside the kernel

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Date:	Fri, 3 Oct 2008 19:08:36 +0200
From:	Thomas Renninger <trenn@...e.de>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	rui.zhang@...el.com, pavel@...e.cz
Subject: Re: [PATCH v2] thermal: Make it simpler to use the thermal layer inside the kernel

On Wednesday 01 October 2008 08:41:11 pm Matthew Garrett wrote:
> The thermal layer passes temperatures and trip point types around as
> strings. This is fine for sysfs, but makes it hard to use them for other
> purposes in-kernel. Move the string conversion to the sysfs-specific
> code.
I went through your very first version and I also like the string to 
int conversion very much.
I wanted to move the polling from acpi/thermal.c to the new thermal
layer to have the thermal polling in the architecture independent part
and started on top of your first version, but I got stuck and run out of time, 
otherwise I'd also sent this.

>  struct thermal_cooling_device_ops {
> -	int (*get_max_state) (struct thermal_cooling_device *, char *);
> -	int (*get_cur_state) (struct thermal_cooling_device *, char *);
> +	int (*get_max_state) (struct thermal_cooling_device *, unsigned int *);
> +	int (*get_cur_state) (struct thermal_cooling_device *, unsigned int *);
>  	int (*set_cur_state) (struct thermal_cooling_device *, unsigned int);
>  };
Looks like you forgot the menlow driver again which also makes use of this:

grep get_max_state drivers/misc/intel_menlow.c
        .get_max_state = memory_get_max_bandwidth,

It would be great to see the conversion in .28.

        Thomas
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