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thermal/drivers/qcom: add support for PMIC5 Gen3 ADC thermal monitoring

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Add support for ADC_TM part of PMIC5 Gen3 in an auxiliary driver
under the Gen3 ADC driver. Its functionality is similar to that of
PMIC5 Gen2 ADC_TM, which implements the threshold setting and
interrupt generating functions, used to support thermal trip points.

In Gen3 ADC, the register interface is implemented on one or more SDAM
(Shared Direct Access Memory) peripherals instead of dedicated ADC
peripherals. Each ADC SDAM has eight channels which can be configured
for either immediate reads (main ADC driver's functionality) or ADC_TM
reads. By convention, the first channel of the first ADC SDAM is reserved
for all immediate reads and remaining channels across all SDAMs are used
for ADC_TM functionality.

On the first SDAM, the interrupt line and configuration registers are
shared between the main ADC and auxiliary ADC_TM drivers. Access to the
registers is protected through a mutex shared between the drivers. The
ADC_TM driver accesses this mutex and some other functions shared from
the main driver (like adc5_gen3_get_scaled_reading() for immediate channel
reads in the .get_temp() callback) through APIs exported into a shared
namespace.

Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://patch.msgid.link/20260722-gen3_adc_tm-v4-3-011981f756c8@oss.qualcomm.com
This commit is contained in:
Jishnu Prakash
2026-08-07 17:18:45 +02:00
committed by Daniel Lezcano
parent b39f9b4b21
commit 948ee3a74f
2 changed files with 10 additions and 0 deletions
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drivers/thermal/qcom/Kconfig
+9
View File
@@ -35,6 +35,15 @@ config QCOM_SPMI_MBG_TM
interrupts are forwarded to the thermal framework as trip-violation
events. Current support handles a single LVL1 upper (hot) trip.
config QCOM_SPMI_ADC_TM5_GEN3
tristate "Qualcomm SPMI PMIC Thermal Monitor ADC5 Gen3"
depends on QCOM_SPMI_ADC5_GEN3
help
This enables the auxiliary thermal driver for the ADC5 Gen3 thermal
monitoring device. It shows up as a thermal zone with multiple trip points.
Thermal client sets threshold temperature for both warm and cool and
gets updated when a threshold is reached.
config QCOM_SPMI_TEMP_ALARM
tristate "Qualcomm SPMI PMIC Temperature Alarm"
depends on OF && SPMI && IIO
drivers/thermal/qcom/Makefile
+1
View File
@@ -4,6 +4,7 @@ obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o
qcom_tsens-y += tsens.o tsens-v2.o tsens-v1.o tsens-v0_1.o \
tsens-8960.o
obj-$(CONFIG_QCOM_SPMI_ADC_TM5) += qcom-spmi-adc-tm5.o
obj-$(CONFIG_QCOM_SPMI_ADC_TM5_GEN3) += qcom-spmi-adc-tm5-gen3.o
obj-$(CONFIG_QCOM_SPMI_MBG_TM) += qcom-spmi-mbg-tm.o
obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o
obj-$(CONFIG_QCOM_LMH) += lmh.o