linux-kernel - Re: [PATCHv2 1/1] thermal: of: improve of-thermal sensor registration API

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Message-ID: <546A8EA9.5070001@kapsi.fi>
Date:	Tue, 18 Nov 2014 02:11:21 +0200
From:	Mikko Perttunen <mikko.perttunen@...si.fi>
To:	Eduardo Valentin <edubezval@...il.com>,
	Linux PM <linux-pm@...r.kernel.org>
CC:	Caesar Wang <caesar.wang@...k-chips.com>, Wei Ni <wni@...dia.com>,
	Lukasz Majewski <l.majewski@...sung.com>,
	Alexandre Courbot <gnurou@...il.com>,
	devicetree@...r.kernel.org, Grant Likely <grant.likely@...aro.org>,
	Guenter Roeck <linux@...ck-us.net>,
	Jean Delvare <jdelvare@...e.de>, linux-kernel@...r.kernel.org,
	linux-tegra@...r.kernel.org, lm-sensors@...sensors.org,
	Rob Herring <robh+dt@...nel.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Zhang Rui <rui.zhang@...el.com>
Subject: Re: [PATCHv2 1/1] thermal: of: improve of-thermal sensor registration
 API

On 11/18/2014 12:44 AM, Eduardo Valentin wrote:
> Different drivers request API extensions in of-thermal. For this reason,
> additional callbacks are required to fit the new drivers needs.
>
> The current API implementation expects the registering sensor driver
> to provide a get_temp and get_trend callbacks as function parameters.
> As the amount of callbacks is growing, this patch changes the existing
> implementation to use a .ops field to hold all the of thermal callbacks
> to sensor drivers.
>
> This patch also changes the existing of-thermal users to fit the new
> API design. No functional change is introduced in this patch.
>
> Cc: Alexandre Courbot <gnurou@...il.com>
> Cc: devicetree@...r.kernel.org
> Cc: Grant Likely <grant.likely@...aro.org>
> Cc: Guenter Roeck <linux@...ck-us.net>
> Cc: Jean Delvare <jdelvare@...e.de>
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-pm@...r.kernel.org
> Cc: linux-tegra@...r.kernel.org
> Cc: lm-sensors@...sensors.org
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Stephen Warren <swarren@...dotorg.org>
> Cc: Thierry Reding <thierry.reding@...il.com>
> Cc: Zhang Rui <rui.zhang@...el.com>
> Signed-off-by: Eduardo Valentin <edubezval@...il.com>
> ---
>
> Difference from V1:
>   - Fix error handling when .get_trend is not provided.
>
> ---
>   drivers/hwmon/lm75.c                               |  9 +++--
>   drivers/hwmon/ntc_thermistor.c                     |  6 +++-
>   drivers/hwmon/tmp102.c                             |  6 +++-
>   drivers/thermal/of-thermal.c                       | 41 +++++++++-------------
>   drivers/thermal/tegra_soctherm.c                   |  7 ++--
>   drivers/thermal/ti-soc-thermal/ti-thermal-common.c |  8 +++--
>   include/linux/thermal.h                            | 24 +++++++++----
>   7 files changed, 62 insertions(+), 39 deletions(-)
>
> ...
> diff --git a/drivers/thermal/tegra_soctherm.c b/drivers/thermal/tegra_soctherm.c
> index 70f7e9e..893c39c 100644
> --- a/drivers/thermal/tegra_soctherm.c
> +++ b/drivers/thermal/tegra_soctherm.c
> @@ -317,6 +317,10 @@ static int tegra_thermctl_get_temp(void *data, long *out_temp)
>   	return 0;
>   }
>
> +static const struct thermal_zone_of_device_ops tegra_of_thermal_ops = {
> +	.get_trend = tegra_thermctl_get_temp,
> +};

This should probably read ".get_temp = tegra_thermctl_get_temp" instead 
of .get_trend :)

> ...

Cheers,
Mikko

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