linux-kernel - Re: [PATCH] pwm: rockchip: simplify rockchip_pwm_get

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Message-ID: <20200602123914.GA3360525@ulmo>
Date:   Tue, 2 Jun 2020 14:39:14 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Heiko Stuebner <heiko@...ech.de>,
        David Wu <david.wu@...k-chips.com>, linux-pwm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pwm: rockchip: simplify rockchip_pwm_get_state()

On Thu, Sep 19, 2019 at 11:17:27AM +0200, Rasmus Villemoes wrote:
> The way state->enabled is computed is rather convoluted and hard to
> read - both branches of the if() actually do the exact same thing. So
> remove the if(), and further simplify "<boolean condition> ? true :
> false" to "<boolean condition>".
> 
> Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
> ---
> I stumbled on this while trying to understand how the pwm subsystem
> works. This patch is a semantic no-op, but it's also possible that,
> say, the first branch simply contains a "double negative" so either
> the != should be == or the "false : true" should be "true : false".
> 
>  drivers/pwm/pwm-rockchip.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)

I've applied this. Irrespective of any feedback David would have this is
correct and a nice simplification.

Thierry

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