[PATCH v3 4/5] gpio: gpio-aspeed-sgpio: Add set_config function

[Steven Lee <steven_lee@aspeedtech.com>]

The 06/03/2021 19:07, Andy Shevchenko wrote:
> On Thu, Jun 3, 2021 at 1:20 PM Steven Lee <steven_lee@aspeedtech.com> wrote:
> >
> > AST SoC supports *retain pin state* function when wdt reset.
> > The patch adds set_config function for handling sgpio reset tolerance
> > register.
> 
> ...
> 
> > +static int aspeed_sgpio_set_config(struct gpio_chip *chip, unsigned int offset,
> > +                                  unsigned long config)
> > +{
> > +       unsigned long param = pinconf_to_config_param(config);
> > +       u32 arg = pinconf_to_config_argument(config);
> > +
> > +       if (param == PIN_CONFIG_PERSIST_STATE)
> > +               return aspeed_sgpio_reset_tolerance(chip, offset, arg);
> 
> > +       else
> 
> Redundant.
> 
> > +               return -EOPNOTSUPP;
> 
> IIRC we are using ENOTSUPP internally in the kernel. YEs, checkpatch
> warning may be ignored.
> 
> > +}
> 

I will modify the code as you suggested above, thanks.

> -- 
> With Best Regards,
> Andy Shevchenko