diff options
| author | Stephan Gerhold <stephan.gerhold@kernkonzept.com> | 2023-06-07 12:47:46 +0200 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2023-06-26 12:03:13 +0200 |
| commit | b6f739da0070c36655118618a173a59fa14c7adc (patch) | |
| tree | dc531eb5893e5d0bc6964d99f31ed25955f4bd13 /drivers/thermal/qcom/tsens.c | |
| parent | 6812d1dfbca99cd5032683354bf50e0002b2aa02 (diff) | |
thermal/drivers/qcom/tsens-v0_1: Add mdm9607 correction offsets
According to the msm-3.18 vendor kernel from Qualcomm, mdm9607 needs
"correction factors" to adjust for additional offsets observed after the
factory calibration values in the fuses [1, 2].
The fixed offsets should be applied unless there is a special
calibration mode value that indicates that no offsets are needed [3].
Note that the new calibration mode values are called differently in this
patch compared to the vendor kernel:
- TSENS_TWO_POINT_CALIB_N_WA -> ONE_PT_CALIB2_NO_OFFSET
- TSENS_TWO_POINT_CALIB_N_OFFSET_WA -> TWO_PT_CALIB_NO_OFFSET
This is because close inspection of the calibration function [3] reveals
that TSENS_TWO_POINT_CALIB_N_WA is actually a "one point" calibration
because the if statements skip all "point2" related code for it.
[1]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/commit/d9d2db1b82bf3f72f5de0803d55e6849eb5b671e
[2]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/commit/d75aef53a760e8ff7bac54049d00c8b2ee1b193e
[3]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/blob/LE.UM.4.3.2.r1-04200-9x07/drivers/thermal/msm-tsens.c#L2987-3136
Fixes: a2149ab815fc ("thermal/drivers/qcom/tsens-v0_1: Add support for MDM9607")
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230508-msm8909-tsens-v5-3-5eb632235ba7@kernkonzept.com
Diffstat (limited to 'drivers/thermal/qcom/tsens.c')
| -rw-r--r-- | drivers/thermal/qcom/tsens.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index 1c457b55efb3..9dd5e4b70911 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -134,10 +134,12 @@ int tsens_read_calibration(struct tsens_priv *priv, int shift, u32 *p1, u32 *p2, p1[i] = p1[i] + (base1 << shift); break; case TWO_PT_CALIB: + case TWO_PT_CALIB_NO_OFFSET: for (i = 0; i < priv->num_sensors; i++) p2[i] = (p2[i] + base2) << shift; fallthrough; case ONE_PT_CALIB2: + case ONE_PT_CALIB2_NO_OFFSET: for (i = 0; i < priv->num_sensors; i++) p1[i] = (p1[i] + base1) << shift; break; @@ -149,6 +151,18 @@ int tsens_read_calibration(struct tsens_priv *priv, int shift, u32 *p1, u32 *p2, } } + /* Apply calibration offset workaround except for _NO_OFFSET modes */ + switch (mode) { + case TWO_PT_CALIB: + for (i = 0; i < priv->num_sensors; i++) + p2[i] += priv->sensor[i].p2_calib_offset; + fallthrough; + case ONE_PT_CALIB2: + for (i = 0; i < priv->num_sensors; i++) + p1[i] += priv->sensor[i].p1_calib_offset; + break; + } + return mode; } @@ -254,7 +268,7 @@ void compute_intercept_slope(struct tsens_priv *priv, u32 *p1, if (!priv->sensor[i].slope) priv->sensor[i].slope = SLOPE_DEFAULT; - if (mode == TWO_PT_CALIB) { + if (mode == TWO_PT_CALIB || mode == TWO_PT_CALIB_NO_OFFSET) { /* * slope (m) = adc_code2 - adc_code1 (y2 - y1)/ * temp_120_degc - temp_30_degc (x2 - x1) |