linux-kernel - [PATCH v2 0/2] clk: Fix CLK_OPS_PARENT

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Message-Id: <20220713082111.2233016-1-wenst@chromium.org>
Date:   Wed, 13 Jul 2022 16:21:09 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     Chen-Yu Tsai <wenst@...omium.org>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
Subject: [PATCH v2 0/2] clk: Fix CLK_OPS_PARENT_ENABLE and runtime PM

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.


Regards
ChenYu

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(-)

-- 
2.37.0.170.g444d1eabd0-goog