[v7,0/6] Add CPU clock support for Armada 7K/8K

Message

Gregory CLEMENT July 10, 2019, 1:43 p.m. UTC

Hello,

This is the seventh version of a series allowing to manage the cpu
clock for Armada 7K/8K.

For these SoCs, the CPUs share the same clock by cluster, so actually
the clock management is done at cluster level.

As for the other Armada 7K/8K clocks it is possible to have multiple
AP so here again we need to have unique name: the purpose of the second
patch is to share a common code which will be used in 3 drivers.

The last 2 patch enable the driver at dt and platform level and will
be applied through the mvebu subsystem.

Changelog v6->v7:

   - Update binding documentation for the AP clock to mention that
     they expose reference clocks for the cluster to make distinction
     with the cluster clocks themselves exposed by the cpu clock.

   - Add precision on the number of parent clock in the binding
     documentation.

   - Also fix the example by using the reg address in the node name.

Changelog v5->v6:

   - Restraint the reg property for the child node to not overlap the
     other node.
   - Give a specific compatible to ap_syscon1.

Changelog v4->v5:

 - As requested by the device tree maintainer make the reg property
   mandatory

 - Updated the device tree files accordingly with the new binding

Changelog v3->v4:
 - Rebased on v5.1-rc1
 - Mention in the binding that a reg property can be used to make the
   device tree maintainer happy in the hope that there will be finally
   a review on this patch blocking the whole series.

Changelog v2->v3:
 - Add back the first patch documenting the binding

Changelog v1->v2:
 - Header cleanup
 - Use unsigned int instead of it for cluster member of the ap_cpu_clk struct
 - Use clk_hw instead of clk
 - Use regmap_read_poll_timeout
 - Use for_each_of_cpu_node
 - Remove unnecessary WARN_ON()
 - Remove headers from armada_ap_cp_helper.h
 - Few other minor cleanup

Gregory CLEMENT (6):
  dt-bindings: ap806: add the cluster clock node in the syscon file
  clk: mvebu: add helper file for Armada AP and CP clocks
  clk: mvebu: add CPU clock driver for Armada 7K/8K
  clk: mvebu: ap806: Fix clock name for the cluster
  arm64: marvell: enable the  Armada 7K/8K CPU clk driver
  arm64: dts: marvell: Add cpu clock node on Armada 7K/8K

 .../arm/marvell/ap806-system-controller.txt   |  31 ++-
 arch/arm64/Kconfig.platforms                  |   1 +
 .../boot/dts/marvell/armada-ap806-quad.dtsi   |   4 +
 arch/arm64/boot/dts/marvell/armada-ap806.dtsi |   7 +
 drivers/clk/mvebu/Kconfig                     |   8 +
 drivers/clk/mvebu/Makefile                    |   2 +
 drivers/clk/mvebu/ap-cpu-clk.c                | 259 ++++++++++++++++++
 drivers/clk/mvebu/ap806-system-controller.c   |  24 +-
 drivers/clk/mvebu/armada_ap_cp_helper.c       |  30 ++
 drivers/clk/mvebu/armada_ap_cp_helper.h       |  11 +
 drivers/clk/mvebu/cp110-system-controller.c   |  32 +--
 11 files changed, 365 insertions(+), 44 deletions(-)
 create mode 100644 drivers/clk/mvebu/ap-cpu-clk.c
 create mode 100644 drivers/clk/mvebu/armada_ap_cp_helper.c
 create mode 100644 drivers/clk/mvebu/armada_ap_cp_helper.h