linux-kernel - Re: [PATCH] pinctrl: bcm2835: Use define directive for BCM2835_PINCONF_PARAM

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Message-ID: <4619d04e-3f17-f1d8-2cca-a9b62f063d75@i2se.com>
Date:   Thu, 1 Nov 2018 09:18:34 +0100
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Nathan Chancellor <natechancellor@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     Eric Anholt <eric@...olt.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com, linux-gpio@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [PATCH] pinctrl: bcm2835: Use define directive for
 BCM2835_PINCONF_PARAM_PULL

Am 01.11.18 um 01:46 schrieb Nathan Chancellor:
> Clang warns when one enumerated type is implicitly converted to another:
>
> drivers/pinctrl/bcm/pinctrl-bcm2835.c:707:40: warning: implicit
> conversion from enumeration type 'enum bcm2835_pinconf_param' to
> different enumeration type 'enum pin_config_param' [-Wenum-conversion]
>         configs[0] = pinconf_to_config_packed(BCM2835_PINCONF_PARAM_PULL, pull);
>                      ~~~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~
> 1 warning generated.
>
> It is expected that pinctrl drivers can extend pin_config_param because
> of the gap between PIN_CONFIG_END and PIN_CONFIG_MAX so this conversion
> isn't an issue. Most drivers that take advantage of this define the
> PIN_CONFIG variables as constants, rather than enumerated values. Do the
> same thing here so that Clang no longer warns.
>
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
> ---
>  

Acked-by: Stefan Wahren <stefan.wahren@...e.com>