On Fri, Jul 03, 2026 at 07:43:39PM +0530, Gaurav Kohli wrote:
>
>
> On 7/3/2026 1:23 PM, Konrad Dybcio wrote:
> > On 7/3/26 7:03 AM, Gaurav Kohli wrote:
> > > Add Device Tree binding constants for Qualcomm Thermal Mitigation
> > > Device (TMD) types used by remoteproc-backed thermal cooling devices.
> > >
> > > Qualcomm remote processors expose thermal mitigation endpoints
> > > through QMI. These endpoints can be registered with the thermal
> > > framework via the `#cooling-cells` property on the remoteproc node.
> > >
> > > The QMI TMD protocol identifies devices using string names (for example,
> > > "pa", "modem", and "cdsp_sw"), while the DT cooling-device binding with
> > > `#cooling-cells = <3>` requires numeric device id in the form:
> > >
> > > <&phandle device_id min_state max_state>
> > >
> > > Define common TMD device index constants shared across currently
> > > supported platforms. If a future target requires a different mapping,
> > > additional target-specific constants can be introduced while preserving
> > > existing DT ABI.
> > >
> > > Signed-off-by: Gaurav Kohli <[email protected]>
> > > ---
> > > MAINTAINERS | 1 +
> > > include/dt-bindings/firmware/qcom,qmi-tmd.h | 20 ++++++++++++++++++++
> > > 2 files changed, 21 insertions(+)
> > >
> > > diff --git a/MAINTAINERS b/MAINTAINERS
> > > index 57656ec0e9d5..ffd85fd1dd80 100644
> > > --- a/MAINTAINERS
> > > +++ b/MAINTAINERS
> > > @@ -3410,6 +3410,7 @@ F: drivers/firmware/qcom/
> > > F: drivers/soc/qcom/
> > > F: drivers/watchdog/gunyah_wdt.c
> > > F: include/dt-bindings/arm/qcom,ids.h
> > > +F: include/dt-bindings/firmware/qcom,qmi-tmd.h
> > > F: include/dt-bindings/firmware/qcom,scm.h
> > > F: include/dt-bindings/soc/qcom*
> > > F: include/linux/firmware/qcom
> > > diff --git a/include/dt-bindings/firmware/qcom,qmi-tmd.h
> > > b/include/dt-bindings/firmware/qcom,qmi-tmd.h
> > > new file mode 100644
> > > index 000000000000..73efecef0f3c
> > > --- /dev/null
> > > +++ b/include/dt-bindings/firmware/qcom,qmi-tmd.h
> > > @@ -0,0 +1,20 @@
> > > +/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
> > > +/*
> > > + * Qualcomm QMI TMD (Thermal Mitigation Device) cooling device indices
> > > + *
> > > + * These indices are used in device tree cooling-maps to reference
> > > + * specific TMD devices provided by remote processors via QMI.
> > > + *
> > > + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
> > > + */
> > > +#ifndef _DT_BINDINGS_FIRMWARE_QCOM_QMI_TMD_H
> > > +#define _DT_BINDINGS_FIRMWARE_QCOM_QMI_TMD_H
> > > +
> > > +/* CDSP thermal mitigation device id */
> > > +#define QCOM_CDSP_TMD_CDSP_SW 0
> > > +
> > > +/* Modem thermal mitigation device id */
> > > +#define QCOM_MODEM_TMD_PA 0
> > > +#define QCOM_MODEM_TMD_MODEM 1
> >
> > What about the dozens other ones that Dmitry's laptop reports?Ri
> >
>
> Thanks for the review, Konrad.
>
> We are only defining constants for the TMD devices that are actually used
> for thermal mitigation on the platforms supported by this series.
Why are you using only those TMD devices?
> More constants can be added as needed.
Kodiak is one of the supported platforms.
Running the same tool produces:
TMD service: instance=0x00 (modem) node=0 port=20
29 mitigation device(s):
[ 0] pa max_mitigation_level=3
[ 1] pa_fr1 max_mitigation_level=3
[ 2] modem max_mitigation_level=3
[ 3] cpuv_restriction_cold max_mitigation_level=1
[ 4] modem_current max_mitigation_level=3
[ 5] vbatt_low max_mitigation_level=3
[ 6] charge_state max_mitigation_level=3
[ 7] modem_skin max_mitigation_level=3
[ 8] modem_bw max_mitigation_level=5
[ 9] mmw0 max_mitigation_level=3
[10] mmw1 max_mitigation_level=3
[11] mmw2 max_mitigation_level=3
[12] mmw3 max_mitigation_level=3
[13] mmw_skin0 max_mitigation_level=3
[14] mmw_skin1 max_mitigation_level=3
[15] mmw_skin2 max_mitigation_level=3
[16] mmw_skin3 max_mitigation_level=3
[17] mmw_skin0_dsc max_mitigation_level=15
[18] mmw_skin1_dsc max_mitigation_level=15
[19] mmw_skin2_dsc max_mitigation_level=15
[20] mmw_skin3_dsc max_mitigation_level=15
[21] wlan max_mitigation_level=4
[22] wlan_bw max_mitigation_level=1
[23] modem_skin_lte_dsc max_mitigation_level=255
[24] modem_skin_nr_dsc max_mitigation_level=255
[25] pa_dsc max_mitigation_level=255
[26] pa_fr1_dsc max_mitigation_level=255
[27] modem_bw_backoff max_mitigation_level=255
[28] cpr_cold max_mitigation_level=3
TMD service: instance=0x01 (adsp) node=5 port=8
1 mitigation device(s):
[ 0] cpuv_restriction_cold max_mitigation_level=1
TMD service: instance=0x43 (cdsp) node=10 port=9
3 mitigation device(s):
[ 0] cpuv_restriction_cold max_mitigation_level=1
[ 1] cdsp_hw max_mitigation_level=1
[ 2] cdsp_sw max_mitigation_level=7
>
> > https://lore.kernel.org/linux-arm-msm/4gs664zboaqgpok33x7bgorfmhh3f2fahjkt4jjl6fbzpwixnm@hxzz2xeogd4k/
> >
> > Konrad
>
--
With best wishes
Dmitry
