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

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Message-ID: <CAA8EJpqM5i88UKSrQyG1pMM6NQb8naTri-jNt++q7oKB-zdGAg@mail.gmail.com>
Date:   Mon, 27 Jun 2022 18:15:15 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...ainline.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 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.

> +
> +#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]

-- 
With best wishes
Dmitry