[PATCH 0/6] Add support for Qualcomm TSCSS hardware

[Imran Shaik <imran.shaik@oss.qualcomm.com>]

This series introduces support for the Qualcomm Timestamp Counter Subsystem
(TSCSS) hardware, a time synchronization subsystem present on Qualcomm
Lemans, Monaco and QDU1000 SoCs.

TSCSS is composed of two main hardware blocks:
 - Timestamp Counter (TSC): a free-running hardware counter that provides
   continuous timekeeping for the SoC, and is functional with a GCC TSC AHB
   config clock and a global counter clock. The TSC counter resolution and
   supported functionalities vary across SoC variants.

 - Event Timestamp Unit (ETU): an optional block that captures TSC counter
   timestamps against external hardware events. Each ETU slice binds a
   slice identifier to an external event selector, and the ETU additionally
   requires its own clock, pinctrl along with either a per-slice interrupt
   (QDU1000) or a single summary interrupt across all ETU slices (Lemans
   and Monaco).

 +------------------------------------------------+  +------------------+
 | Global clock controller - TSC AHB/CNTR/ETU CLK |  |  EVENT_IN[0:15]  |
 +------------------------------------------------+  +------------------+
                          |                                  |
                          v                                  v
 +----------------------------------------------------------------------+
 |               Timestamp Counter Subsystem (TSCSS)                    |
 |                                                                      |
 |                   +----------------------------------------------+   |
 |  +------------+   |         Event Timestamp Unit (ETU)           |   |
 |  | Timestamp  |   |           0x01C90000-0x01C9FFFF              |   |
 |  |  Counter   |   | +------------------------------------------+ |   |
 |  |   (TSC)    |   | |               ETU Slices                 | |   |
 |  |            |   | | [Slice 0]  [Slice 1]   [...]  [Slice 15] | |   |
 |  | 0x1C80000  |   | | 0x1C90000  0x1C91000          0x1C9F000  | |   |
 |  +------------+   | |                                          | |   |
 |                   | +-----------+------------------------------+ |   |
 |                   +-------------|--------------------+-----------+   |
 |                                 |                    |               |
 +---------------------------------|--------------------|---------------+
                                   |                    |
                                   v                    v
                         +----------------------------------------+
                         |    per-slice IRQ  (OR)  summary IRQ    |
                         |      (QDU1000)            (Lemans)     |
                         +----------------------------------------+
                                             |
                                             v
                              +-----------------------------+
                              |   Interrupt Controller      |
                              +-----------------------------+

The address offsets shown in the diagram above are specific to Qualcomm
Lemans SoC.

This series currently covers only the TSC block driver functionality; ETU
driver support will follow in a later series.

Signed-off-by: Imran Shaik <imran.shaik@oss.qualcomm.com>
---
Imran Shaik (6):
      dt-bindings: ptp: Document the TSCSS on Qualcomm Lemans and Monaco SoCs
      dt-bindings: ptp: Document TSCSS hardware on Qualcomm QDU1000 SoC
      ptp: qcom: Add PTP driver for the Qualcomm TSC hardware
      arm64: defconfig: Enable Qualcomm TSC driver
      arm64: dts: qcom: lemans: Add support for TSCSS node
      arm64: dts: qcom: qdu1000: Add support for TSCSS node

 .../devicetree/bindings/ptp/qcom,lemans-tscss.yaml | 198 ++++++++++
 .../bindings/ptp/qcom,qdu1000-tscss.yaml           | 187 ++++++++++
 arch/arm64/boot/dts/qcom/lemans.dtsi               |  11 +
 arch/arm64/boot/dts/qcom/qdu1000.dtsi              |  11 +
 arch/arm64/configs/defconfig                       |   1 +
 drivers/ptp/Kconfig                                |  10 +
 drivers/ptp/Makefile                               |   1 +
 drivers/ptp/ptp_qcom_tsc.c                         | 413 +++++++++++++++++++++
 8 files changed, 832 insertions(+)
---
base-commit: c5e32e86ca02b003f86e095d379b38148999293d
change-id: 20260705-tscss-441d844c1ee7

Best regards,
-- 
Imran Shaik <imran.shaik@oss.qualcomm.com>