[PATCH v4 0/8] riscv: Clean up timer drivers

[Sean Anderson <seanga2@gmail.com>]

This series cleans up the timer drivers in RISC-V and converts them to DM.

This series needs to be tested! I have only tested it on QEMU and the K210.
Notably, this means that the HiFive and anything Andes is completely untested.

Changes in v4:
- Both the Andes PMLT and Sifive CLINT now fall back on timebase-frequency,
  per discussion with Anup Patel
- Introduce helper function for falling back on timebase-frequency
- Modify RISCV_TIMER KConfig
  - Now depends on RISCV
  - Implied by S-Mode (with or without SPL)
- Rebase
- Remove clock-frequency property from k210 clint binding because we fall
  back on timebase-frequency

Changes in v3:
- Don't initialize the IPI in spl_invoke_opensbi. Further testing has
  revealed it to be unnecessary.
- Rebase

Changes in v2:
- Fix SiFive CLINT not getting tick-rate from rtcclk
- Remove RISCV_RDTIME KConfig option
- Split Kendryte binding changes into their own commit

Sean Anderson (8):
  riscv: Rework riscv timer driver to only support S-mode
  timer: Add helper for drivers using timebase fallback
  riscv: Rework Andes PLMT as a UCLASS_TIMER driver
  riscv: Clean up initialization in Andes PLIC
  riscv: Rework Sifive CLINT as UCLASS_TIMER driver
  riscv: clk: Add CLINT clock to kendryte clock driver
  riscv: Update Kendryte device tree for new CLINT driver
  riscv: Update SiFive device tree for new CLINT driver

 arch/riscv/Kconfig                            | 16 -----
 arch/riscv/cpu/ax25/Kconfig                   |  2 +-
 arch/riscv/cpu/fu540/Kconfig                  |  2 +-
 arch/riscv/cpu/generic/Kconfig                |  2 +-
 arch/riscv/dts/ae350_32.dts                   |  1 +
 arch/riscv/dts/ae350_64.dts                   |  1 +
 arch/riscv/dts/fu540-c000-u-boot.dtsi         |  8 ++-
 .../dts/hifive-unleashed-a00-u-boot.dtsi      |  4 ++
 arch/riscv/dts/k210.dtsi                      |  7 +-
 arch/riscv/include/asm/global_data.h          |  3 -
 arch/riscv/lib/Makefile                       |  1 -
 arch/riscv/lib/andes_plic.c                   | 58 +++++++---------
 arch/riscv/lib/andes_plmt.c                   | 44 ++++++-------
 arch/riscv/lib/rdtime.c                       | 38 -----------
 arch/riscv/lib/sifive_clint.c                 | 66 ++++++++++---------
 drivers/clk/kendryte/clk.c                    |  4 ++
 drivers/ram/sifive/Kconfig                    |  2 +
 drivers/timer/Kconfig                         |  4 +-
 drivers/timer/riscv_timer.c                   | 39 +++++------
 drivers/timer/timer-uclass.c                  | 25 +++++++
 include/dt-bindings/clock/k210-sysctl.h       |  1 +
 include/timer.h                               | 15 +++++
 22 files changed, 170 insertions(+), 173 deletions(-)
 delete mode 100644 arch/riscv/lib/rdtime.c

-- 
2.28.0