thermal/qcom/tsens: Drop ops_v0_1

Since the commit 6812d1dfbca9 ("thermal/drivers/qcom/tsens-v0_1: Fix
mdm9607 slope values") the default v0.1 implementation of tsens
options is unused by the driver. Drop it now to stop compiler
complaining about the unused static const. If it appears there is the
need for the default v0.1 ops struct, this commit can be easily
reverted without further considerations.

Fixes: 6812d1dfbca9 ("thermal/drivers/qcom/tsens-v0_1: Fix mdm9607 slope values")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20231019144311.1035181-1-dmitry.baryshkov@linaro.org

thermal/drivers/tsens: Make tsens_xxxx_nvmem static

This patch fixes the following sparse warnings:

drivers/thermal/qcom/tsens-v1.c:24:40: sparse: warning: symbol 'tsens_qcs404_nvmem' was not declared. Should it be static?
drivers/thermal/qcom/tsens-v0_1.c:26:40: sparse: warning: symbol 'tsens_8916_nvmem' was not declared. Should it be static?
drivers/thermal/qcom/tsens-v0_1.c:42:40: sparse: warning: symbol 'tsens_8974_nvmem' was not declared. Should it be static?
drivers/thermal/qcom/tsens-v0_1.c:64:40: sparse: warning: symbol 'tsens_8974_backup_nvmem' was not declared. Should it be static?

No functional change intended.

Signed-off-by: Min-Hua Chen <minhuadotchen@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230713160415.149381-1-minhuadotchen@gmail.com

thermal/drivers/qcom/tsens-v0_1: Add MSM8909 data

The MSM8909 SoC has 5 thermal sensors in a TSENS v0.1 block. Like
MDM9607 it uses a non-standard default slope value of 3000 [1] and needs
per-sensor "correction factors" to workaround issues with the factory
calibration [2].

[1]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/blob/LA.UM.7.7.c26-09100-8x09.0/arch/arm/boot/dts/qcom/msm8909.dtsi#L476
[2]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/commit/6df022c6d0c2c1b4a5a6c2124dba4d57910c0911

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-v5-6-5eb632235ba7@kernkonzept.com

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

thermal/drivers/qcom/tsens-v0_1: Fix mdm9607 slope values

According to the msm-3.18 vendor kernel from Qualcomm [1], mdm9607 uses
a non-standard slope value of 3000 (instead of 3200) for all sensors.
Fill it properly similar to the 8939 code added recently.

[1]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/blob/LE.UM.4.3.2.r1-04200-9x07/arch/arm/boot/dts/qcom/mdm9607.dtsi#L875

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-v5-2-5eb632235ba7@kernkonzept.com

thermal/drivers/qcom/tsens: Drop unused legacy structs

The old single-cell parsing code was removed for MSM8939, MDM9607 and
MSM8976 but for some reason the structs defining the bit positions etc
were kept around (unused). Drop them now.

Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: 51d78b8b1beb ("thermal/drivers/tsens: Drop single-cell code for mdm9607")
Fixes: dfadb4599ab0 ("thermal/drivers/tsens: Drop single-cell code for msm8939")
Fixes: 3a908971f7cb ("thermal/drivers/tsens: Drop single-cell code for msm8976/msm8956")
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230508-msm8909-tsens-v5-1-5eb632235ba7@kernkonzept.com

thermal/drivers/qcom/tsens-v0_1: Add support for MSM8226

The MSM8226 TSENS IP has 6 thermal sensors in a TSENS v0.1 block.
The thermal sensors use non-standard slope values.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230507201225.89694-4-matti.lehtimaki@gmail.com

thermal/drivers/tsens: Drop single-cell code for msm8939

There is no dtsi file for msm8939 in the kernel sources. Drop the
compatibility with unofficial dtsi and remove support for handling the
single-cell calibration data on msm8939.

Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230101194034.831222-14-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/tsens: Drop single-cell code for mdm9607

There is no dtsi file for mdm9607 in the kernel sources. Drop the
compatibility with unofficial dtsi and remove support for handling the
single-cell calibration data on mdm9607.

Cc: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230101194034.831222-13-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/tsens: Rework legacy calibration data parsers

Rework existing calibration parsing code to use simple data structure
describing data layout. This allows us to drop all the mask & shift
values, replacing them with data tables.

The code for msm8974 is not reworked, as it has separate calibration and
backup data.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230101194034.831222-12-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/tsens: Support using nvmem cells for msm8974 calibration

MSM8974 has two sets of calibration data: main one and backup. Add
support for parsing both sets of calibration data from nvmem cells.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230101194034.831222-11-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/tsens: Support using nvmem cells for calibration data

Add a unified function using nvmem cells for parsing the calibration
data rather than parsing the calibration blob manually.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230101194034.831222-10-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/tsens: limit num_sensors to 9 for msm8939

On msm8939 last (hwid=10) sensor was added in the hw revision 3.0.
Calibration data for it was placed outside of the main calibration data
blob, so it is not accessible by the current blob-parsing code.

Moreover data for the sensor's p2 is not contiguous in the fuses. This
makes it hard to use nvmem_cell API to parse calibration data in a
generic way.

Since the sensor doesn't seem to be actually used by the existing
hardware, disable the sensor for now.

Fixes: 332bc8ebab2c ("thermal: qcom: tsens-v0_1: Add support for MSM8939")
Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Cc: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Link: https://lore.kernel.org/r/20230101194034.831222-9-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/tsens: fix slope values for msm8939

According to the vendor kernels (msm-3.10, 3.14 and 3.18), msm8939
uses non-standard slope values for calibrating the sensors. Fill them
accordingly.

Fixes: 332bc8ebab2c ("thermal: qcom: tsens-v0_1: Add support for MSM8939")
Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Cc: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Link: https://lore.kernel.org/r/20230101194034.831222-8-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/tsens: Drop unnecessary hw_ids

The tsens driver defaults to using hw_id equal to the index of the
sensor. Thus it is superfluous to declare such hw_id arrays. Drop such
arrays from mdm9607 and msm8976 data.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230101194034.831222-5-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/tsens: Allow configuring min and max trips

IPQ8074 and IPQ6018 dont support negative trip temperatures and support
up to 204 degrees C as the max trip temperature.

So, instead of always setting the -40 as min and 120 degrees C as max
allow it to be configured as part of the features.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220818220245.338396-3-robimarko@gmail.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/tsens: Add support for combined interrupt

Despite using tsens v2.3 IP, IPQ8074 and IPQ6018 only have one IRQ for
signaling both up/low and critical trips.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220818220245.338396-2-robimarko@gmail.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/qcom/tsens-v0_1: Fix MSM8939 fourth sensor hw_id

Reading temperature from this sensor fails with 'Invalid argument'.

Looking at old vendor dts [1], its hw_id should be 3 instead of 4.
Change this hw_id accordingly.

[1] https://github.com/msm8916-mainline/android_kernel_qcom_msm8916/blob/master/arch/arm/boot/dts/qcom/msm8939-common.dtsi#L511

Fixes: 332bc8ebab2c ("thermal: qcom: tsens-v0_1: Add support for MSM8939")
Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Link: https://lore.kernel.org/r/20220811105014.7194-1-vincent.knecht@mailoo.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

thermal/drivers/qcom/tsens-v0_1: Add support for MDM9607

MDM9607 TSENS IP is very similar to the one of MSM8916, with
minor adjustments to various tuning values.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Acked-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210319220802.198215-2-konrad.dybcio@somainline.org

treewide: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

thermal: qcom: tsens-v0_1: Add support for MSM8939

The TSENS integrated on MSM8939 is a v0_1 device with 10 sensors.
Different from its predecessor MSM8916, where 'calib_sel' bits sit in
separate qfprom word, MSM8939 has 'cailb' and 'calib_sel' bits mixed and
spread on discrete offsets. That's why all qfprom bits are read as one
go and later mapped to calibration data for MSM8939.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Amit Kucheria <amit.kucheria@linaro.org>
Tested-by: Konrad Dybcio <konradybcio@gmail.com> /* on Asus Z00T smartphone */
Acked-by: Konrad Dybcio <konradybcio@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200629144926.665-3-shawn.guo@linaro.org

drivers: thermal: tsens: De-constify struct tsens_features

struct tsens_features is currently initialized as part of platform data
at compile-time and not modifiable. We now have some usecases in feature
detection across IP versions where it is more flexible to update the
features after probing registers.

Remove const qualifier from tsens_features and the encapsulating
tsens_plat_data.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/2919a72220470366ae11e0bb5330a4ea39838f71.1584015867.git.amit.kucheria@linaro.org

drivers: thermal: tsens: Add interrupt support

Depending on the IP version, TSENS supports upper, lower and critical
threshold interrupts. We only add support for upper and lower threshold
interrupts for now.

TSENSv2 has an irq [status|clear|mask] bit tuple for each sensor while
earlier versions only have a single bit per sensor to denote status and
clear. These differences are handled transparently by the interrupt
handler. At each interrupt, we reprogram the new upper and lower threshold
in the .set_trip callback.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/7508ba143f144407e5dd546107ddae65c380a76f.1572526427.git.amit.kucheria@linaro.org

drivers: thermal: qcom: tsens: Fix memory leak from qfprom read

memory returned as part of nvmem_read via qfprom_read should be
freed by the consumer once done.
Existing code is not doing it so fix it.

Below memory leak detected by kmemleak
[<ffffff80088b7658>] kmemleak_alloc+0x50/0x84
[<ffffff80081df120>] __kmalloc+0xe8/0x168
[<ffffff80086db350>] nvmem_cell_read+0x30/0x80
[<ffffff8008632790>] qfprom_read+0x4c/0x7c
[<ffffff80086335a4>] calibrate_v1+0x34/0x204
[<ffffff8008632518>] tsens_probe+0x164/0x258
[<ffffff80084e0a1c>] platform_drv_probe+0x80/0xa0
[<ffffff80084de4f4>] really_probe+0x208/0x248
[<ffffff80084de2c4>] driver_probe_device+0x98/0xc0
[<ffffff80084dec54>] __device_attach_driver+0x9c/0xac
[<ffffff80084dca74>] bus_for_each_drv+0x60/0x8c
[<ffffff80084de634>] __device_attach+0x8c/0x100
[<ffffff80084de6c8>] device_initial_probe+0x20/0x28
[<ffffff80084dcbb8>] bus_probe_device+0x34/0x7c
[<ffffff80084deb08>] deferred_probe_work_func+0x6c/0x98
[<ffffff80080c3da8>] process_one_work+0x160/0x2f8

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

Revert "drivers: thermal: tsens: Add new operation to check if a sensor is enabled"

This reverts commit 3e6a8fb3308419129c7a52de6eb42feef5a919a0.

Cc: Andy Gross <agross@kernel.org>
Cc: David Brown <david.brown@linaro.org>
Cc: Amit Kucheria <amit.kucheria@linaro.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Suggested-by: Amit Kucheria <amit.kucheria@linaro.org>
Reported-by: Andy Gross <andygro@gmail.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers: thermal: tsens: Introduce IP-specific max_sensor count

The IP can support 'm' sensors while the platform can enable 'n' sensors
of the 'm' where n <= m.

Track maximum sensors supported by the IP so that we can correctly track
what subset of the sensors are supported on the platform.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers: thermal: tsens: Add new operation to check if a sensor is enabled

is_sensor_enabled() checks if the sensors are enabled on this platform.
It is possible that the SoC might choose not to enable all the sensors
that the IP block is capable of supporting.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers: thermal: tsens: Introduce reg_fields to deal with register description

As we add support for newer versions of the TSENS IP, the current
approach isn't scaling because registers and bitfields get moved around,
requiring platform-specific hacks in the code. By moving to regmap, we
can hide the register level differences away from the code.

Define a common set of registers and bit-fields that we care about
across the various tsens IP versions.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers: thermal: tsens: Merge tsens-8974 into tsens-v0_1

8974 and 8916 have the same version of the TSENS IP. Merge the files to
allow for better code reuse.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers: thermal: tsens: Rename constants to prepare to merge with tsens-8974

Some #defines in tsens-v_0_1.c clash with those in tsens-8974.c. Prefix
them with 8916 to avoid the clash so we can merge the two files.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers: thermal: tsens: Rename tsens-8916 to prepare to merge with tsens-8974

8916 and 8974 use v0.1.0 of the TSENS IP. Rename tsens-8916 to prepare
it for merging with tsens-8974 in a later commit.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>