[PATCH v6 0/5] Add driver for EC found on Qualcomm reference devices

[Anvesh Jain P]

From: Anvesh Jain P <anvesh.p@xxxxxxxxxxxxxxxx>

Add Embedded controller driver support for Hamoa/Purwa/Glymur Qualcomm
reference boards. It handles fan control, temperature sensors, access
to EC state changes and supports reporting suspend entry/exit to the EC.

---
Changes in v6:
  - Add missing includes: <linux/bits.h>, <linux/device.h>
    and <linux/err.h>.
  - Change the thermistor_mask format specifier from %d to %x.
  - Change loop counter to unsigned int.
  - Replace snprintf() with scnprintf() for safer string handling.
  - Use sizeof(name) instead of the EC_FAN_NAME_SIZE macro directly.
  - Add missing braces.
  - Link to v5: https://lore.kernel.org/r/20260317-add-driver-for-ec-v5-0-38d11f524856@xxxxxxxxxxxxxxxx

Changes in v5:
  - Fix subject line and commit description, drop redundant
    "bindings for".
  - Rename binding file: qcom,hamoa-ec.yaml → qcom,hamoa-crd-ec.yaml
    to match the compatible string.
  - Update $id URI to match the new filename.
  - Add <linux/interrupt.h> and <linux/slab.h> includes.
  - Switch to devm_thermal_of_cooling_device_register, remove manual
    unroll loop.
  - Ratelimit all IRQ handler log messages.
  - Promote unknown EC event log from dev_dbg to dev_notice.
  - Remove redundant error message after devm_request_threaded_irq.
  - Simplify qcom_ec_sci_evt_control, resume, and suspend using direct
    returns.
  - Add dev_warn + early return for zero fan count; driver stays loaded
    for PM notifications.
  - Fix thermistor presence bitmask documentation: 1 = present, 0 = absent.
  - Fix snprintf format specifier to %u to suppress -Wformat-truncation.
  - Remove unused cdev variable from qcom_ec_probe.
  - Fix typo: "exluding" → "excluding" in register map comments.
  - Fix capitalization: "ec" → "EC" in error messages.
  - Link to v4: https://lore.kernel.org/r/20260313-v04-add-driver-for-ec-v4-0-ca9d0efd62aa@xxxxxxxxxxxxxxxx

Changes in v4:
  - Fix fan count calculation to use min() instead of max() to correctly
    cap fan_cnt at EC_MAX_FAN_CNT.
  - Remove unnecessary mutex lock/unlock.
  - Disable fan debug mode on ec module removal.
  - Fix issue reported by kernel test robot.
  - Consolidate hamoa-iot-evk specific changes into hamoa-iot-evk.dts.
  - Add board-specific compatible strings as per review comments.
  - Link to v3: https://lore.kernel.org/all/20260308233646.2318676-1-sibi.sankar@xxxxxxxxxxxxxxxx/

Changes in v3:
  - Revamp the bindings and driver to support generic ec specification
    that works across Qualcomm Hamoa/Purwa and Glymur reference devices.
  - Add ec nodes to Hamoa/Purwa CRDs and IOT-EVKs.
  - Add ec node to Glymur CRDs.
  - Link to v2: https://lore.kernel.org/lkml/20241219200821.8328-1-maccraft123mc@xxxxxxxxx/
  - Link to v1: https://lore.kernel.org/lkml/20240927185345.3680-1-maccraft123mc@xxxxxxxxx/

---
Maya Matuszczyk (1):
      dt-bindings: embedded-controller: Add Qualcomm reference device EC description

Sibi Sankar (4):
      platform: arm64: Add driver for EC found on Qualcomm reference devices
      arm64: dts: qcom: glymur-crd: Add Embedded controller node
      arm64: dts: qcom: x1-crd: Add Embedded controller node
      arm64: dts: qcom: hamoa-iot-evk: Add Embedded controller node

 .../embedded-controller/qcom,hamoa-crd-ec.yaml     |  56 +++
 MAINTAINERS                                        |   8 +
 arch/arm64/boot/dts/qcom/glymur-crd.dts            |  22 +
 arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts         |  16 +
 arch/arm64/boot/dts/qcom/x1-crd.dtsi               |  16 +
 drivers/platform/arm64/Kconfig                     |  12 +
 drivers/platform/arm64/Makefile                    |   1 +
 drivers/platform/arm64/qcom-hamoa-ec.c             | 451 +++++++++++++++++++++
 8 files changed, 582 insertions(+)
---
base-commit: 85964cdcad0fac9a0eb7b87a0f9d88cc074b854c
change-id: 20260309-add-driver-for-ec-3fa478f264d9

Best regards,
-- 
Anvesh Jain P <anvesh.p@xxxxxxxxxxxxxxxx>