linux-kernel - Re: Aw: regression with 33140e668b10 thermal/drivers/mediatek: Control buffer enablement tweaks

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Message-ID: <07a569b9-e691-64ea-dd65-3b49842af33d@linaro.org>
Date:   Tue, 12 Sep 2023 14:57:45 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Frank Wunderlich <frank-w@...lic-files.de>
Cc:     Markus Schneider-Pargmann <msp@...libre.com>,
        Fabien Parent <fparent@...libre.com>,
        Amjad Ouled-Ameur <aouledameur@...libre.com>,
        Daniel Golle <daniel@...rotopia.org>,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Alex Riabchenko <d3adme4t@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Matthias Brugger <matthias.bgg@...il.com>
Subject: Re: Aw: regression with 33140e668b10 thermal/drivers/mediatek:
 Control buffer enablement tweaks


Hi Frank,

thanks for reporting and investigating the issue.


On 31/08/2023 15:34, Frank Wunderlich wrote:
> Hi,
> 
> looked a bit deeper into it and it looks like i only need to add the fields in the mtk_thermal_data struct
> 
> --- a/drivers/thermal/mediatek/auxadc_thermal.c
> +++ b/drivers/thermal/mediatek/auxadc_thermal.c
> @@ -690,6 +690,9 @@ static const struct mtk_thermal_data mt7986_thermal_data = {
>          .adcpnp = mt7986_adcpnp,
>          .sensor_mux_values = mt7986_mux_values,
>          .version = MTK_THERMAL_V3,
> +       .apmixed_buffer_ctl_reg = APMIXED_SYS_TS_CON1,
> +       .apmixed_buffer_ctl_mask = GENMASK(31, 6) | BIT(3),
> +       .apmixed_buffer_ctl_set = BIT(0),
>   };
> 
> in my quick test the temprature can be read again and i'm near room temperature...i though it was a bit higher before, but as far as i understand the code, the values were fixed before and only made it configurable.
> 
> if someone can confirm that i'm right, i can send official patch.

At the first glance, it seems the proposed change is correct and could 
be proposed as a hot fix.

However, the conditions with the version and the apmixed_buffer_ctl_reg 
looks a bit fuzzy.

Markus, can you revisit this part of code and consolidate the 
configurable approach ?

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