Re: [PATCH v2] pinctrl: zynq: Use define directive for PIN_CONFIG_IO_STANDARD

[Linus Walleij]

On Wed, Nov 7, 2018 at 9:57 AM Nathan Chancellor
<natechancellor@xxxxxxxxx> wrote:

> Clang warns when one enumerated type is implicitly converted to another:
>
> drivers/pinctrl/pinctrl-zynq.c:985:18: warning: implicit conversion from
> enumeration type 'enum zynq_pin_config_param' to different enumeration
> type 'enum pin_config_param' [-Wenum-conversion]
>         {"io-standard", PIN_CONFIG_IOSTANDARD, zynq_iostd_lvcmos18},
>         ~               ^~~~~~~~~~~~~~~~~~~~~
> drivers/pinctrl/pinctrl-zynq.c:990:16: warning: implicit conversion from
> enumeration type 'enum zynq_pin_config_param' to different enumeration
> type 'enum pin_config_param' [-Wenum-conversion]
>         = { PCONFDUMP(PIN_CONFIG_IOSTANDARD, "IO-standard", NULL, true),
>             ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ./include/linux/pinctrl/pinconf-generic.h:163:11: note: expanded from
> macro 'PCONFDUMP'
>         .param = a, .display = b, .format = c, .has_arg = d     \
>                  ^
> 2 warnings 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@xxxxxxxxx>
> ---
>
> v1 -> v2:

This v2 version applied with Michal's ACK.

Yours,
Linus Walleij