From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Date: Mon, 21 Dec 2015 11:01:53 +0000 Subject: Re: [PATCH v5] extcon: add Maxim MAX3355 driver Message-Id: <5677DC21.3040509@cogentembedded.com> List-Id: References: <5948633.my3nAG6hRz@wasted.cogentembedded.com> <5676E214.2040009@cogentembedded.com> <5677662C.6060409@samsung.com> In-Reply-To: <5677662C.6060409@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Chanwoo Choi Cc: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , "myungjoo.ham@samsung.com" , devicetree , linux-kernel , linux-sh@vger.kernel.org, linux-usb@vger.kernel.org Hello. On 12/21/2015 5:38 AM, Chanwoo Choi wrote: >>> This patch depend on GPIOLIB configuration as following: >>> I modified it with following diff and applied it. >>> >>> diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig >>> index ba4db7d..3d89e60 100644 >>> --- a/drivers/extcon/Kconfig >>> +++ b/drivers/extcon/Kconfig >>> @@ -54,6 +54,7 @@ config EXTCON_MAX14577 >>> >>> config EXTCON_MAX3355 >>> tristate "Maxim MAX3355 USB OTG EXTCON Support" >>> + depends on GPIOLIB || COMPILE_TEST >> >> If it won't compile w/o gpiolib, what's the use of COMIPLE_TEST? >> And no, it shouldn't depend on gpiolib. It has empty stubs for the case of CONFIG_GPIOLIB=n. Obviously something is wrong with the GPIO headers, I'll look into it. > > Yes. When GPIOLIB is disabled, the build issue don't happen. What? It surely does happen! > because include/linux/gpio/consumer.h implement the dummy function > for all gpio functions if CONFIG_GPIOLIB is disabled. Linus W. advised to #include this header explicitly -- I'll try and post. > For correct operation of max3355, you should add the dependency > to the extcon-max3355.c driver. This driver use the GPIO library > certainly. I disagree. The driver will just cease to load in this case. I don't see why we need such dependency. Only compilation time dependencies should be specified, I think. > COMPILE_TEST is used for just build test. You can see the detailed data[1]. > [1] https://lkml.org/lkml/2013/5/22/155 I know. Re-read my question please. > Thanks, > Chanwoo Choi MBR, Sergei