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Date:   Mon, 23 Jul 2018 18:12:39 +0200
From:   Boris Brezillon <boris.brezillon@bootlin.com>
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     Randy Dunlap <rdunlap@infradead.org>,
        Anders Roxell <anders.roxell@linaro.org>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Rob Herring <robh@kernel.org>,
        DTML <devicetree@vger.kernel.org>
Subject: Re: [PATCH] drivers/memory/Kconfig: Add CONFIG_OF dependency
Message-ID: <20180723181239.61dba0e1@bbrezillon>
In-Reply-To: <CAK8P3a10SsWuPXzOyRcNKa+ukvj_Gq13JyDTngoU8DJu6_MR0Q@mail.gmail.com>
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        <20180722082939.2de739f1@bbrezillon>
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        <20180723114107.664164d2@bbrezillon>
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On Mon, 23 Jul 2018 17:40:29 +0200
Arnd Bergmann <arnd@arndb.de> wrote:

> On Mon, Jul 23, 2018 at 11:41 AM, Boris Brezillon
> <boris.brezillon@bootlin.com> wrote:
> > On Mon, 23 Jul 2018 11:34:43 +0200
> > Arnd Bergmann <arnd@arndb.de> wrote:
> >  
> >> On Sun, Jul 22, 2018 at 8:29 AM, Boris Brezillon
> >> <boris.brezillon@bootlin.com> wrote:  
> >> > +Arnd, Rob and the DT ML.
> >> >
> >> > On Sat, 21 Jul 2018 14:53:47 -0700
> >> > Randy Dunlap <rdunlap@infradead.org> wrote:
> >> >  
> >> >> On 07/21/2018 01:00 PM, Anders Roxell wrote:  
> >> >> > JZ4780_NEMC doesn't depend on OF, and if OF isn't enabled we get this
> >> >> > error:
> >> >> > drivers/memory/jz4780-nemc.c: In function ‘jz4780_nemc_num_banks’:
> >> >> > drivers/memory/jz4780-nemc.c:72:10: error: implicit declaration of
> >> >> >  function ‘of_read_number’; did you mean ‘down_read_nested’?
> >> >> >  [-Werror=implicit-function-declaration]
> >> >> >    bank = of_read_number(prop, 1);
> >> >> >           ^~~~~~~~~~~~~~
> >> >> >           down_read_nested  
> >> >
> >> > Looks like of.h defines stubs so that people can compile-test without
> >> > CONFIG_OF selected. Maybe we should move of_read_number() and
> >> > of_read_ulong() out of the #ifdef CONFIG_OF section.  
> >>
> >> That seems fine, though the added dependency seems appropriate
> >> here as well. of_read_number() is rarely used, and for the most part in
> >> powerpc specific code that is guaranteed to have CONFIG_OF enabled,
> >> so it's not that likely to cause many more problems.  
> >
> > Ok, then I'll let Miquel apply Anders' patch to the NAND tree.
> >
> > Thanks for your feedback.  
> 
> My randconfig build bot just ran into a second problem with this driver
> with CONFIG_GPIOLIB disabled:
> 
> drivers/mtd/nand/raw/jz4740_nand.c: In function 'jz_nand_dev_ready':
> drivers/mtd/nand/raw/jz4740_nand.c:133:9: error: implicit declaration
> of function 'gpiod_get_value_cansleep'; did you mean
> 'gpio_get_value_cansleep'? [-Werror=implicit-function-declaration]
>   return gpiod_get_value_cansleep(nand->busy_gpio);
>          ^~~~~~~~~~~~~~~~~~~~~~~~
>          gpio_get_value_cansleep
> drivers/mtd/nand/raw/jz4740_nand.c: In function 'jz_nand_probe':
> drivers/mtd/nand/raw/jz4740_nand.c:388:20: error: implicit declaration
> of function 'devm_gpiod_get_optional'; did you mean
> 'devm_gpio_request_one'? [-Werror=implicit-function-declaration]
>   nand->busy_gpio = devm_gpiod_get_optional(&pdev->dev, "busy", GPIOD_IN);
>                     ^~~~~~~~~~~~~~~~~~~~~~~
>                     devm_gpio_request_one
> drivers/mtd/nand/raw/jz4740_nand.c:388:64: error: 'GPIOD_IN'
> undeclared (first use in this function); did you mean 'GPIOF_IN'?
>   nand->busy_gpio = devm_gpiod_get_optional(&pdev->dev, "busy", GPIOD_IN);
>                                                                 ^~~~~~~~
>                                                                 GPIOF_IN
> 
> 
> We could add another dependency here or (my preference) include
> linux/gpio/consumer.h to fix that. Do you want a separate patch for
> it, or should Anders send a combined patch?

I already fixed that one last week [1], it's been applied yet.

Thanks,

Boris

[1]http://patchwork.ozlabs.org/patch/946614/