[PATCH v6 0/4] Exynos Thermal code improvement

[Daniel Lezcano]

On 5/15/25 13:10, Anand Moon wrote:
> Hi Daniel,
> 
> On Wed, 14 May 2025 at 16:53, Daniel Lezcano <daniel.lezcano at linaro.org> wrote:
>>
>> On Wed, Apr 30, 2025 at 06:02:56PM +0530, Anand Moon wrote:
>>> Hi All,
>>
>> Hi Anand,
>>
>> if the goal of the changes is to do cleanups, I recommend to rework
>> how the code is organized. Instead of having the data->soc check all
>> around the functions, write per platform functions and store them in
>> struct of_device_id data field instead of the soc version.
>>
>> Basically get rid of exynos_map_dt_data by settings the different ops
>> in a per platform structure.
>>
>> Then the initialization routine would be simpler to clean.
>>
> 
> Thanks, I had previously attempted this approach.
> The goal is to split the exynos_tmu_data structure to accommodate
> SoC-specific callbacks for initialization and configuration.
> 
> In my earlier attempt, I tried to refactor the code to achieve this.
> However, the main challenge I encountered was that the
> exynos_sensor_ops weren’t being correctly mapped for each SoC.
> 
> Some SoC have multiple sensor
> exynos4x12
>                      tmu: tmu at 100c0000
> exynos5420
>                  tmu_cpu0: tmu at 10060000
>                  tmu_cpu1: tmu at 10064000
>                  tmu_cpu2: tmu at 10068000
>                  tmu_cpu3: tmu at 1006c000
>                  tmu_gpu: tmu at 100a0000
>   exynos5433
>                  tmu_atlas0: tmu at 10060000
>                  tmu_atlas1: tmu at 10068000
>                  tmu_g3d: tmu at 10070000
> exynos7
>                  tmu at 10060000
> 
> It could be a design issue of the structure.or some DTS issue.
> So what I found in debugging it is not working correctly.
> 
> static const struct thermal_zone_device_ops exynos_sensor_ops = {
>          .get_temp = exynos_get_temp,
>          .set_emul_temp = exynos_tmu_set_emulation,
>          .set_trips = exynos_set_trips,
> };
> 
> The sensor callback will not return a valid pointer and soc id for the get_temp.
> 
> Here is my earlier version of local changes.
> [1] https://pastebin.com/bbEP04Zh exynos_tmu.c
> [2] https://pastebin.com/PzNz5yve Odroid U3 dmesg.log
> [3] https://pastebin.com/4Yjt2d2u    Odroid Xu4 dmesg.log
> 
> I want to re-model the structure to improve the code.
> Once Its working condition I will send this for review.
> 
> If you have some suggestions please let me know.

I suggest to do the conversion step by step beginning by 
exynos4210_tmu_clear_irqs, then by exynos_map_dt_data as the first 
cleanup iteration


-- 
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog