[RFC PATCH v2 0/3] thermal: Integrate VTM and AVS driver

[Kumar, Udit]

Dear All,

On 9/8/2023 10:59 PM, Udit Kumar wrote:
> VTM (Voltage and Thermal Manager) IP is used for following purpose
> 1) AVS class 0
> 2) Thermal management (setting thermal shutdown TSHUT) temperature.
> 3) SoC temperature reporting.
>
> In origin boot flow, R5/SPL sets the AVS voltage using
> by AVS driver, residing under UCLASS_MISC.
>
> In this series At top level, following changes are done
> - Moved avs driver to Thermal class
> - Ported kernel driver (drivers/thermal/k3_j72xx_bandgap.c) which
> supports TSHUT and temperature reporting
> - Merged these two driver as one under UCLASS_THERMAL.
>
> This series aims to
> - set avs and thermal shutdown at R5/SPL stage
> - At main u-boot stage, support thermal shutdown and temperature reporting
>
>
> Also, j72xx_bandgap does complex math to get ADC value to temperature
> conversion, This table is pretty static.
> So at R5 SPL stage, instead of calculation, fixed values is used
> for TSHUT values.
> and #ifdef is used skip non needed code for SPL/R5 to reduce code size.

Kindly review and provide feedback, if this approach looks ok.

Thanks

Udit


> Change log
> Changes in v2:
> v1 : https://lore.kernel.org/all/20230901061500.2342452-1-u-kumar1@ti.com/
> - Trying to merge AVS and kernel driver into 1
> - Mark as RFC
>
>
> Udit Kumar (3):
>    thermal: k3: Add support for thermal in vtm
>    arm: mach-k3: update board file to use thermal device
>    arm: dts: k3: update device tree for vtm node
>
>   arch/arm/dts/k3-j7200-mcu-wakeup.dtsi         |   9 +
>   .../arm/dts/k3-j7200-r5-common-proc-board.dts |   6 -
>   arch/arm/dts/k3-j721e-mcu-wakeup.dtsi         |  10 +
>   .../arm/dts/k3-j721e-r5-common-proc-board.dts |   7 -
>   arch/arm/dts/k3-j721e-r5-sk.dts               |   7 -
>   arch/arm/mach-k3/am654_init.c                 |   2 +-
>   arch/arm/mach-k3/j721e_init.c                 |   2 +-
>   configs/am65x_evm_r5_defconfig                |   3 +
>   configs/am65x_evm_r5_usbdfu_defconfig         |   3 +
>   configs/am65x_evm_r5_usbmsc_defconfig         |   3 +
>   configs/am65x_hs_evm_r5_defconfig             |   3 +
>   configs/j7200_evm_a72_defconfig               |   3 +
>   configs/j7200_evm_r5_defconfig                |   3 +
>   configs/j721e_evm_a72_defconfig               |   3 +
>   configs/j721e_evm_r5_defconfig                |   3 +
>   drivers/misc/Makefile                         |   1 -
>   drivers/misc/k3_avs.c                         | 394 --------
>   drivers/thermal/Kconfig                       |   7 +
>   drivers/thermal/Makefile                      |   1 +
>   drivers/thermal/k3_thermal.c                  | 928 ++++++++++++++++++
>   20 files changed, 981 insertions(+), 417 deletions(-)
>   delete mode 100644 drivers/misc/k3_avs.c
>   create mode 100644 drivers/thermal/k3_thermal.c
>