linux-kernel - Re: [PATCH] pinctrl: stmfx: Fix compile issue when CONFIG_OF

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Message-ID: <eb8425ec-989a-9701-7fee-61bd1d2b93c1@st.com>
Date:   Wed, 22 May 2019 08:08:12 +0000
From:   Amelie DELAUNAY <amelie.delaunay@...com>
To:     Lee Jones <lee.jones@...aro.org>
CC:     Linus Walleij <linus.walleij@...aro.org>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "kbuild-all@...org" <kbuild-all@...org>
Subject: Re: [PATCH] pinctrl: stmfx: Fix compile issue when CONFIG_OF_GPIO is
 not defined



On 5/22/19 7:48 AM, Lee Jones wrote:
> On Mon, 20 May 2019, Amelie Delaunay wrote:
> 
>> When CONFIG_GPIO_OF is not defined, struct gpio_chip 'of_node' member does
>> not exist:
>> drivers/pinctrl/pinctrl-stmfx.c: In function 'stmfx_pinctrl_probe':
>> drivers/pinctrl/pinctrl-stmfx.c:652:17: error: 'struct gpio_chip' has no member named 'of_node'
>>       pctl->gpio_chip.of_node = np;
>>
>> Fixes: 1490d9f841b1 ("pinctrl: Add STMFX GPIO expander Pinctrl/GPIO driver")
>> Reported-by: kbuild test robot <lkp@...el.com>
>> Signed-off-by: Amelie Delaunay <amelie.delaunay@...com>
>> ---
>>   drivers/pinctrl/pinctrl-stmfx.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/pinctrl/pinctrl-stmfx.c b/drivers/pinctrl/pinctrl-stmfx.c
>> index eba872c..bb64aa0 100644
>> --- a/drivers/pinctrl/pinctrl-stmfx.c
>> +++ b/drivers/pinctrl/pinctrl-stmfx.c
>> @@ -648,7 +648,9 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
>>   	pctl->gpio_chip.base = -1;
>>   	pctl->gpio_chip.ngpio = pctl->pctl_desc.npins;
>>   	pctl->gpio_chip.can_sleep = true;
>> +#ifdef CONFIG_OF_GPIO
>>   	pctl->gpio_chip.of_node = np;
>> +#endif
> 
> This is pretty ugly.  Will STMFX ever be used without OF support?  If
> not, it might be better to place this restriction on the driver as a
> whole.
> 
> Incidentally, why is this blanked out in the structure definition?
> Even 'struct device' doesn't do this.
> 
config PINCTRL_STMFX
	tristate "STMicroelectronics STMFX GPIO expander pinctrl driver"
	depends on I2C
	depends on OF || COMPILE_TEST
	select GENERIC_PINCONF
	select GPIOLIB_IRQCHIP
	select MFD_STMFX

The issue is due to COMPILE_TEST: would "depends on OF || (OF && 
COMPILE_TEST)" be better ?

>>   	pctl->gpio_chip.need_valid_mask = true;
>>   
>>   	ret = devm_gpiochip_add_data(pctl->dev, &pctl->gpio_chip, pctl);
>