linux-kernel - [PATCH 0/3] clk: keystone: syscon-clk: fixes for audio refclk

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Date:   Tue,  1 Aug 2023 12:36:06 +0200
From:   Matthias Schiffer <matthias.schiffer@...tq-group.com>
To:     Santosh Shilimkar <ssantosh@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     Jai Luthra <j-luthra@...com>, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux@...tq-group.com,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>
Subject: [PATCH 0/3] clk: keystone: syscon-clk: fixes for audio refclk

Currently the driver uses of_clk_hw_onecell_get() for all clocks it
manages, but this is incorrect for the audio refclk, which has 0 rather
than 1 clock cell according to its binding documentation [1]; attempting
to look up the clock when referenced like this in the Device Tree leads
to errors, as uninitialized memory is passed to of_clk_hw_onecell_get()
as the index.

The actual fix is in patch 3; patches 1 and 2 are preparation and
related cleanup. I've added a Fixes: tag to all 3 patches, as they
need to be backported together.

Matthias Schiffer (3):
  clk: keystone: syscon-clk: use struct instead of array for match data
  clk: keystone: syscon-clk: specify whether a parent is required in
    match data
  clk: keystone: syscon-clk: use of_clk_hw_simple_get() for audio refclk

[1] https://www.kernel.org/doc/Documentation/devicetree/bindings/clock/ti,am62-audio-refclk.yaml

 drivers/clk/keystone/syscon-clk.c | 73 ++++++++++++++++++++-----------
 1 file changed, 48 insertions(+), 25 deletions(-)

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