[PATCH v5 0/2] firmware: arm_scmi: clock: support parents commands

[Peng Fan (OSS)]

SCMI v3.2 spec adds parents commands, this patchset is to support them:
CLOCK_POSSIBLE_PARENTS_GET
CLOCK_PARENT_SET
CLOCK_PARENT_GET

Besides firmware api clock driver update, the clk_scmi driver also
updated to support set_parent and get_parent ops.

Signed-off-by: Peng Fan <peng.fan@xxxxxxx>

To: Sudeep Holla <sudeep.holla@xxxxxxx>
To: Cristian Marussi <cristian.marussi@xxxxxxx>
To: Michael Turquette <mturquette@xxxxxxxxxxxx>
To: Stephen Boyd <sboyd@xxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-clk@xxxxxxxxxxxxxxx

Changes in v5:
- check return value of devm_kcalloc in patch 2 Per Cristian's comment
- Link to v4: https://lore.kernel.org/r/20231003-scmi-clock-v3-v4-0-358d7f916a05@xxxxxxx

Changes in v4:
 Included Cristian's fix in patch 2 for get parent. Thanks, Cristian.
 Add Cristian's R-b in patch 1
 Rebased on https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git/log/?h=for-next/scmi/updates
 - Link to v3: https://lore.kernel.org/all/20231001-scmi-clock-v2-v3-0-898bd92d8939@xxxxxxx/

Changes in v3:
  Address Cristian's comments:
   - Drop SCMI_MAX_NUM_PARENTS, alloc memory dynamically
   - Check clk_id, parent_id
   - Add comment for parent_get/set
 - Link to v2: https://lore.kernel.org/r/20230925-scmi-clock-v2-v2-0-2d4d7127ebc1@xxxxxxx

Changes in V2:
 - Add determine_rate hooks

---
Peng Fan (2):
      firmware: arm_scmi: clock: support clock parents
      clk: scmi: add set/get_parent support

 drivers/clk/clk-scmi.c            |  60 ++++++++++++-
 drivers/firmware/arm_scmi/clock.c | 182 ++++++++++++++++++++++++++++++++++++--
 include/linux/scmi_protocol.h     |   6 ++
 3 files changed, 241 insertions(+), 7 deletions(-)
---
base-commit: 8b6022be4c6e3e0d37c3e1378c9ff0a2c8717b09
change-id: 20231003-scmi-clock-v3-ae65eb755d15

Best regards,
-- 
Peng Fan <peng.fan@xxxxxxx>