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Date:   Sat, 23 May 2020 22:17:30 +0200
From:   Uwe Kleine-König 
To:     Sven Van Asbroeck <>
Cc:     Andy Shevchenko <>,
        Mika Westerberg <>,
        YueHaibing <>,
        Thierry Reding <>,,,
        Linux Kernel Mailing List <>
Subject: Re: [PATCH -next] pwm: pca9685: Remove set but not used variable

On Thu, Jun 06, 2019 at 11:11:11AM -0400, Sven Van Asbroeck wrote:
> I was able to test the patch [1] exclusion mechanism without access to actual
> hardware - by giving it a dummy regmap. See patch below.
> Test cases (all via sysfs):
> 1. verify requested pwm cannot be requested as gpio
> 2. verify requested gpio cannot be requested as pwm
> 3. verify pwm "all LEDs" cannot be used if pwms/gpios in use
> 4. verify pwms/gpios cannot be requested if pwm "all LEDs" in use
> All test cases ok.
>  Obviously, I could not test multi-threaded correctness.
> [1]

Is this patch still relevant? A patch similar to YueHaibing's one was
merged in the meantime but I guess the underlying problem is still
relevant. Sven, do you care enough to recheck and create a patch on top
of a more recent tree?

Best regards

Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | |

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