linux-kernel - Re: [PATCH v2] clk: expand clk_ignore_unused mechanism to keep only a few clks on

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Date:   Wed, 22 Sep 2021 10:15:49 +0200
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     linux-doc@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        Jonathan Corbet <corbet@....net>
Subject: Re: [PATCH v2] clk: expand clk_ignore_unused mechanism to keep only
 a few clks on

Hello,

On Thu, Aug 19, 2021 at 02:14:03PM +0200, Uwe Kleine-König wrote:
> Allow to pass an integer n that results in only keeping n unused clocks
> enabled.
> 
> This helps to debug the problem if you only know that clk_ignore_unused
> helps but you have no clue yet which clock is the culprit.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

I consider this patch really helpful, it helped me to debug a clk issue
without having to recompile the kernel for each bisection step.

On #kernelnewbies I got some positive feedback for it (1629304050 < j_ey>
ukleinek: nice clk_ignore_unused patch, I added a pr_err there recently
to print the clocks that were being disabled).

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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