linux-kernel - Re: [PATCH V1 02/10] thermal: tegra: combine sensor group-related data

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Date:	Thu, 14 Jan 2016 13:40:45 +0800
From:	Wei Ni <wni@...dia.com>
To:	Thierry Reding <thierry.reding@...il.com>
CC:	<rui.zhang@...el.com>, <mikko.perttunen@...si.fi>,
	<swarren@...dotorg.org>, <linux-tegra@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V1 02/10] thermal: tegra: combine sensor group-related
 data



On 2016年01月13日 22:31, Thierry Reding wrote:
> * PGP Signed by an unknown key
> 
> On Wed, Jan 13, 2016 at 03:58:41PM +0800, Wei Ni wrote:
>> Combine sensor group-related data structures into struct
>> tegra_tsensor_group. This provides a single location for
>> sensor group data storage.
>> More sensor group data will be added in subsequent patches.
>>
>> Get rid of T124-specific PDIV/HOTSPOT hack.
>> tegra-soctherm.c contained a hack to set the SENSOR_PDIV and
>> SENSOR_HOTSPOT_OFFSET registers - it just did two writes of
>> T124-specific opaque values.  Convert these into a form that can be
>> substituted on a per-chip basis, and into structure fields that have
>> at least some independent meaning.
> 
> This reads as two completely separate commit messages. Should the patch
> be split up to separate out the two logical changes?

Hmm, you are right, will do it.

> 
>> diff --git a/drivers/thermal/tegra/tegra_soctherm.c b/drivers/thermal/tegra/tegra_soctherm.c
> [...]
>> +static struct tegra_tsensor_group tegra124_tsensor_group_cpu = {
> [...]
>> +};
>> +
>> +static struct tegra_tsensor_group tegra124_tsensor_group_gpu = {
> [...]
>> +};
>> +
>> +static struct tegra_tsensor_group tegra124_tsensor_group_pll = {
> [...]
>> +};
>> +
>> +static struct tegra_tsensor_group tegra124_tsensor_group_mem = {
> [...]
>> +};
>> +
>> +static struct tegra_tsensor_group *
>> +tegra124_tsensor_groups[TEGRA124_SOCTHERM_SENSOR_NUM] = {
> [...]
>>  };
> 
> These look like they should all be static const.

Yes, they should be "static const", I fixed them in the next patch [03/10].
I will change it in this patch.

> 
>> @@ -168,7 +268,7 @@ struct tegra_soctherm {
>>  	struct clk *clock_soctherm;
>>  	void __iomem *regs;
>>  
>> -	struct thermal_zone_device *thermctl_tzs[4];
>> +	struct thermal_zone_device *thermctl_tzs[TEGRA124_SOCTHERM_SENSOR_NUM];
>>  };
> 
> Does it make sense to use macros here for the number of zones? I suspect
> that since you do parameterize the Tegra210 support that will be added
> later on will have a different maximum number, in which case macros will
> not work very well.

All the Tegra serial chips support 4 thermal zones: cpu, gpu, mem, pllx,
including the Tegra 210, so we can use the TEGRA124_SOCTHERM_SENSOR_NUM.

> 
> But perhaps I'll see how you solved that problem in a later patch.
> 
> Thierry
> 
> * Unknown Key
> * 0x7F3EB3A1
>