[PATCH v2 0/2] clk: Fix CLK_OPS_PARENT_ENABLE and runtime PM

From: Chen-Yu Tsai
Date: Wed Jul 13 2022 - 04:23:48 EST

Hi Mike, Stephen,

Here are a couple fixes for the clk core. They are unrelated but overlap
in diff context, so I'm sending them together.

Patch 1 makes the clk core honor CLK_OPS_PARENT_ENABLE for clk gate ops.
Without this, dumping clk_summary on the MT8192 would cause the system
to hang.

Patch 2 reorders the runtime PM call in clk_core_unprepare() to match
the order described in its original commit, and the opposite of that
in clk_core_prepare().

Changes since v1
- Use clk_core_{enable,disable}_lock() instead of non-locking variant.
Reported by Nícolas
- Added coverage for clk_core_is_prepared()
- Correct sequencing in clk_core_is_enabled() so that runtime PM is
handled before parent clock is enabled, matching other functions.


Chen-Yu Tsai (2):
clk: core: Honor CLK_OPS_PARENT_ENABLE for clk gate ops
clk: core: Fix runtime PM sequence in clk_core_unprepare()

drivers/clk/clk.c | 31 +++++++++++++++++++++++++++++--
1 file changed, 29 insertions(+), 2 deletions(-)