linux-kernel - Re: [PATCH v3 2/2] thermal: qcom: tsens-v1: Add support for MSM8992/4 TSENS

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Message-ID: <e57300bb-163b-2963-e55e-a5d0b0678f4f@somainline.org>
Date:   Tue, 28 Jun 2022 15:19:17 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, martin.botka@...ainline.org,
        angelogioacchino.delregno@...ainline.org,
        marijn.suijten@...ainline.org, jamipkettunen@...ainline.org,
        Amit Kucheria <amitk@...nel.org>,
        Thara Gopinath <thara.gopinath@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Zhang Rui <rui.zhang@...el.com>, linux-pm@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] thermal: qcom: tsens-v1: Add support for MSM8992/4
 TSENS



On 27.06.2022 17:15, Dmitry Baryshkov wrote:
> On Sun, 1 May 2022 at 23:21, Konrad Dybcio <konrad.dybcio@...ainline.org> wrote:
>>
>> MSM8994, despite being heavily based on MSM8974, uses the
>> 1.2 version of TSENS. Also, 8994 being 8994, it has a custom
>> way of calculating the slope.
>>
>> MSM8992 in turn is a cut-down version of MSM8994 and uses
>> the same TSENS hardware, albeit with a different set of sensors.
>>
>> Also tested on 8976 (by a person who didn't want to be named)
>> to make sure the 11->16 max_sensors changes didn't break anything.
>>
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
>> ---
>> Changes since v2:
>>
>> - don't use slope before it's initialized (whoops!)
>> - don't re-assign the same value to p[0..15]
>> - free calib_rsel
>> - use the same ops for 8992 and 8994
>>
>>  drivers/thermal/qcom/tsens-v1.c | 293 ++++++++++++++++++++++++++++++--
>>  drivers/thermal/qcom/tsens.c    |   6 +
>>  drivers/thermal/qcom/tsens.h    |   2 +-
>>  3 files changed, 288 insertions(+), 13 deletions(-)
>>
>> diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
>> index 573e261ccca7..58864962f370 100644
>> --- a/drivers/thermal/qcom/tsens-v1.c
>> +++ b/drivers/thermal/qcom/tsens-v1.c
>> @@ -142,6 +142,99 @@
>>  #define CAL_SEL_MASK   7
>>  #define CAL_SEL_SHIFT  0
>>
>> +/* eeprom layout data for 8994 */
>> +#define MSM8994_BASE0_MASK     0x3ff
>> +#define MSM8994_BASE1_MASK     0xffc00
>> +#define MSM8994_BASE0_SHIFT    0
>> +#define MSM8994_BASE1_SHIFT    10
> 
> Generally I feel that all the _MASK values can be better generated
> using the GENMASK and newly defined _SHIFT value.
Yes, I agree, however I think it'd be better to do it for
all the defines in this file at once in a separate commit.

Konrad
> 
>> +
>> +#define MSM8994_S0_MASK        0xf00000
>> +#define MSM8994_S1_MASK        0xf000000
>> +#define MSM8994_S2_MASK        0xf0000000
>> +#define MSM8994_S3_MASK        0xf
>> +#define MSM8994_S4_MASK        0xf0
>> +#define MSM8994_S5_MASK        0xf00
>> +#define MSM8994_S6_MASK        0xf000
>> +#define MSM8994_S7_MASK        0xf0000
>> +#define MSM8994_S8_MASK        0xf00000
>> +#define MSM8994_S9_MASK        0xf000000
>> +#define MSM8994_S10_MASK       0xf0000000
>> +#define MSM8994_S11_MASK       0xf
>> +#define MSM8994_S12_MASK       0xf0
>> +#define MSM8994_S13_MASK       0xf00
>> +#define MSM8994_S14_MASK       0xf000
>> +#define MSM8994_S15_MASK       0xf0000
>> +
>> +#define MSM8994_S0_SHIFT       20
>> +#define MSM8994_S1_SHIFT       24
>> +#define MSM8994_S2_SHIFT       28
>> +#define MSM8994_S3_SHIFT       0
>> +#define MSM8994_S4_SHIFT       4
>> +#define MSM8994_S5_SHIFT       8
>> +#define MSM8994_S6_SHIFT       12
>> +#define MSM8994_S7_SHIFT       16
>> +#define MSM8994_S8_SHIFT       20
>> +#define MSM8994_S9_SHIFT       24
>> +#define MSM8994_S10_SHIFT      28
>> +#define MSM8994_S11_SHIFT      0
>> +#define MSM8994_S12_SHIFT      4
>> +#define MSM8994_S13_SHIFT      8
>> +#define MSM8994_S14_SHIFT      12
>> +#define MSM8994_S15_SHIFT      16
> 
> [skipped the rest]
>