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The thermal OF code has a new API allowing to migrate the OF
initialization to a simpler approach. The ops are no longer device
tree specific and are the generic ones provided by the core code.
Convert the ops to the thermal_zone_device_ops format and use the new
API to register the thermal zone with these generic ops.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Link: https://lore.kernel.org/r/20220804224349.1926752-22-daniel.lezcano@linexp.org
Reviewed-by: Bryan Brattlof <bb@ti.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Fix sparse warnings:
drivers/thermal/k3_j72xx_bandgap.c:532:36: sparse: sparse: symbol 'k3_j72xx_bandgap_j721e_data' was not declared. Should it be static?
drivers/thermal/k3_j72xx_bandgap.c:536:36: sparse: sparse: symbol 'k3_j72xx_bandgap_j7200_data' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jin Xiaoyun <jinxiaoyun2@huawei.com>
Link: https://lore.kernel.org/r/20220613063111.654893-1-jinxiaoyun2@huawei.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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This while loop exits with "i" set to -1 and so then it sets:
derived_table[-1] = derived_table[0] - 300;
There is no need for this assignment at all. Just delete it.
Fixes: 72b3fc61c752 ("thermal: k3_j72xx_bandgap: Add the bandgap driver support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YoetjwcOEzYEFp9b@kili
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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If an error occurs in the k3_j72xx_bandgap_probe() function the memory
allocated to the 'ref_table' will not be released.
Add a err_free_ref_table step to the error path to free 'ref_table'
Fixes: 72b3fc61c752 ("thermal: k3_j72xx_bandgap: Add the bandgap driver support")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bryan Brattlof <bb@ti.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Link: https://lore.kernel.org/r/20220525213617.30002-1-bb@ti.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Add VTM thermal support. In the Voltage Thermal Management
Module(VTM), K3 J72XX supplies a voltage reference and a temperature
sensor feature that are gathered in the band gap voltage and
temperature sensor (VBGAPTS) module. The band gap provides current and
voltage reference for its internal circuits and other analog IP
blocks. The analog-to-digital converter (ADC) produces an output value
that is proportional to the silicon temperature.
Currently reading temperatures only is supported. There are no
active/passive cooling agent supported.
J721e SoCs have errata i2128: https://www.ti.com/lit/pdf/sprz455
The VTM Temperature Monitors (TEMPSENSORs) are trimmed during production,
with the resulting values stored in software-readable registers. Software
should use these register values when translating the Temperature
Monitor output codes to temperature values.
It has an involved workaround. Software needs to read the error codes for
-40C, 30C, 125C from the efuse for each device & derive a new look up table
for adc to temperature conversion. Involved calculating slopes & constants
using 3 different straight line equations with adc refernce codes as the
y-axis & error codes in the x-axis.
-40C to 30C
30C to 125C
125C to 150C
With the above 2 line equations we derive the full look-up table to
workaround the errata i2128 for j721e SoC.
Tested temperature reading on J721e SoC & J7200 SoC.
[daniel.lezcano@linaro.org: Generate look-up tables run-time]
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Link: https://lore.kernel.org/r/20220517172920.10857-3-j-keerthy@ti.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Daniel Lezcano
Jin Xiaoyun
Dan Carpenter
Bryan Brattlof
Keerthy