linux-kernel - Re: drivers/leds/blink/leds-lgm-sso.c:123:19: error: field has incomplete type 'struct gpio

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Message-ID: <20210302081124.GA10699@amd>
Date:   Tue, 2 Mar 2021 09:11:24 +0100
From:   Pavel Machek <pavel@....cz>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     kernel test robot <lkp@...el.com>, linux-leds@...r.kernel.org,
        Amireddy Mallikarjuna reddy 
        <mallikarjunax.reddy@...ux.intel.com>, kbuild-all@...ts.01.org,
        clang-built-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: drivers/leds/blink/leds-lgm-sso.c:123:19: error: field has
 incomplete type 'struct gpio_chip'

Hi!

> >>>> drivers/leds/blink/leds-lgm-sso.c:263:3: error: implicit declaration of function 'gpiod_set_value' [-Werror,-Wimplicit-function-declaration]
> >>                    gpiod_set_value(led->gpiod, val);
> >>                    ^
> >>    drivers/leds/blink/leds-lgm-sso.c:263:3: note: did you mean
> >>                    'gpio_set_value'?
> > 
> > 
> > It looks like missing #include?
> > 
> > While at it, can you do something with Kconfig help text? Move
> > existing one into comment in the driver, add something useful for end-users.
> 
> The .config file does not set/enable GPIOLIB nor OF.
> 
> AFAICT, this driver needs the addition of:
> 
> #include <linux/gpio/consumer.h>
> #include <linux/gpio/driver.h>
> #include <linux/of.h>
> 
> and the reference to
> 	gc->of_node           = dev->of_node;
> needs to be inside an
> #ifdef CONFIG_GPIO/#endif block.
> 
> Also, <linux/gpio/driver.h> needs a stub for gpiochip_get_data().
> 
> I have most of that ready (it's in the margin) but I can't
> send it tonight. Feel free to fix it up however you want to.

Looking forward. I may be confused, but it looks like original
author's email bounces, which is a bad sign.

What I meant... if you take a look at Kconfig help test, it is really
useless.

Best regards,
								Pavel
-- 
http://www.livejournal.com/~pavelmachek

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