[PATCH v4 0/2] Use GCR.U timer device as clocksource

[Aleksa Paunovic via B4 Relay]

This series adds bindings for the GCR.U timer device and corresponding
driver support. Accessing the memory mapped mtime register in the GCR.U
region should be faster than trapping to M mode each time the timer
needs to be read.

Changes in v4:
- Remove "select" from mti,gcru.yaml.
- Refactor the driver to use function pointers instead of static keys.

Previous versions:
v1: https://lore.kernel.org/lkml/20241227150056.191794-1-arikalo@gmail.com/#t
v2: https://lore.kernel.org/linux-riscv/20250409143816.15802-1-aleksa.paunovic@htecgroup.com/
v3: https://lore.kernel.org/linux-riscv/DU0PR09MB61968695A2A3146EE83B7708F6BA2@DU0PR09MB6196.eurprd09.prod.outlook.com/

Signed-off-by: Aleksa Paunovic <aleksa.paunovic at htecgroup.com>
---
Aleksa Paunovic (2):
      dt-bindings: timer: mti,gcru
      Allow for riscv-clock to pick up mmio address.

 .../devicetree/bindings/timer/mti,gcru.yaml        | 38 ++++++++++++++
 arch/riscv/include/asm/timex.h                     | 48 ++++++-----------
 drivers/clocksource/Kconfig                        | 12 +++++
 drivers/clocksource/timer-riscv.c                  | 61 ++++++++++++++++++++++
 4 files changed, 126 insertions(+), 33 deletions(-)
---
base-commit: 9c32cda43eb78f78c73aee4aa344b777714e259b
change-id: 20250424-riscv-time-mmio-5628e0fca8af

Best regards,
-- 
Aleksa Paunovic <aleksa.paunovic at htecgroup.com>