From: Arnd Bergmann <arnd@arndb.de> To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de>, Alim Akhtar <alim.akhtar@samsung.com>, Tomasz Figa <tomasz.figa@gmail.com>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Linus Walleij <linus.walleij@linaro.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, "moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES" <linux-samsung-soc@vger.kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>, Necip Fazil Yildiran <fazilyildiran@gmail.com>, "# 3.4.x" <stable@vger.kernel.org> Subject: Re: [PATCH] pinctrl: samsung: fix missing GPIOLIB on ARM64 Exynos config Date: Wed, 20 Apr 2022 15:25:32 +0200 [thread overview] Message-ID: <CAK8P3a2uuFMVcsR9c+J28ZsA1cC9+FJCnFy5Lnq6uUY=nPoTEQ@mail.gmail.com> (raw) In-Reply-To: <0c0b53c3-294a-b1ac-487a-ca96266c4bb7@linaro.org> On Wed, Apr 20, 2022 at 2:13 PM Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote: > On 20/04/2022 14:10, Arnd Bergmann wrote: > > On Wed, Apr 20, 2022 at 1:55 PM Krzysztof Kozlowski > > <krzysztof.kozlowski@linaro.org> wrote: > >> > >> The Samsung pinctrl drivers depend on OF_GPIO, which is part of GPIOLIB. > >> ARMv7 Exynos platform selects GPIOLIB and Samsung pinctrl drivers. ARMv8 > >> Exynos selects only the latter leading to possible wrong configuration > >> on ARMv8 build: > >> > >> WARNING: unmet direct dependencies detected for PINCTRL_EXYNOS > >> Depends on [n]: PINCTRL [=y] && OF_GPIO [=n] && (ARCH_EXYNOS [=y] || ARCH_S5PV210 || COMPILE_TEST [=y]) > >> Selected by [y]: > >> - ARCH_EXYNOS [=y] > >> > >> config PINCTRL_EXYNOS > >> bool "Pinctrl common driver part for Samsung Exynos SoCs" > >> - depends on OF_GPIO > >> depends on ARCH_EXYNOS || ARCH_S5PV210 || COMPILE_TEST > >> select PINCTRL_SAMSUNG > >> select PINCTRL_EXYNOS_ARM if ARM && (ARCH_EXYNOS || ARCH_S5PV210) > > > > > > The problem here is that PINCTRL_EXYNOS and the others can be built for > > compile-testing without CONFIG_OF on non-arm machines. > > > > I think the correct dependency line would be > > > > depends on ARCH_EXYNOS || ARCH_S5PV210 || (COMPILE_TEST && OF) > > > > which guarantees that OF_GPIO is also enabled. > > I don't think OF is the problem here, because the error is in missing > GPIOLIB. You are correct that the added dependency is not the solution for the original problem. What I meant is that by dropping the dependency on OF_GPIO, you create a new problem for compile-testing without CONFIG_OF. Adding back the OF dependency avoids the regression. > The platform selects Samsung pinctrl but it does not select > GPIOLIB. Possible fixes are: > 1. Do not select Samsung pinctrl from the platform (but have some > default), so on compile test build it might not work. > 2. Select GPIOLIB from the platform (ARMv7 Exynos does it). > 3. Select GPIOLIB from here - this is current proposal. Agreed, either 2. or 3. is fine, as long as you keep the CONFIG_OF dependency. Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de> To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de>, Alim Akhtar <alim.akhtar@samsung.com>, Tomasz Figa <tomasz.figa@gmail.com>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Linus Walleij <linus.walleij@linaro.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, "moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES" <linux-samsung-soc@vger.kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>, Necip Fazil Yildiran <fazilyildiran@gmail.com>, "# 3.4.x" <stable@vger.kernel.org> Subject: Re: [PATCH] pinctrl: samsung: fix missing GPIOLIB on ARM64 Exynos config Date: Wed, 20 Apr 2022 15:25:32 +0200 [thread overview] Message-ID: <CAK8P3a2uuFMVcsR9c+J28ZsA1cC9+FJCnFy5Lnq6uUY=nPoTEQ@mail.gmail.com> (raw) In-Reply-To: <0c0b53c3-294a-b1ac-487a-ca96266c4bb7@linaro.org> On Wed, Apr 20, 2022 at 2:13 PM Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote: > On 20/04/2022 14:10, Arnd Bergmann wrote: > > On Wed, Apr 20, 2022 at 1:55 PM Krzysztof Kozlowski > > <krzysztof.kozlowski@linaro.org> wrote: > >> > >> The Samsung pinctrl drivers depend on OF_GPIO, which is part of GPIOLIB. > >> ARMv7 Exynos platform selects GPIOLIB and Samsung pinctrl drivers. ARMv8 > >> Exynos selects only the latter leading to possible wrong configuration > >> on ARMv8 build: > >> > >> WARNING: unmet direct dependencies detected for PINCTRL_EXYNOS > >> Depends on [n]: PINCTRL [=y] && OF_GPIO [=n] && (ARCH_EXYNOS [=y] || ARCH_S5PV210 || COMPILE_TEST [=y]) > >> Selected by [y]: > >> - ARCH_EXYNOS [=y] > >> > >> config PINCTRL_EXYNOS > >> bool "Pinctrl common driver part for Samsung Exynos SoCs" > >> - depends on OF_GPIO > >> depends on ARCH_EXYNOS || ARCH_S5PV210 || COMPILE_TEST > >> select PINCTRL_SAMSUNG > >> select PINCTRL_EXYNOS_ARM if ARM && (ARCH_EXYNOS || ARCH_S5PV210) > > > > > > The problem here is that PINCTRL_EXYNOS and the others can be built for > > compile-testing without CONFIG_OF on non-arm machines. > > > > I think the correct dependency line would be > > > > depends on ARCH_EXYNOS || ARCH_S5PV210 || (COMPILE_TEST && OF) > > > > which guarantees that OF_GPIO is also enabled. > > I don't think OF is the problem here, because the error is in missing > GPIOLIB. You are correct that the added dependency is not the solution for the original problem. What I meant is that by dropping the dependency on OF_GPIO, you create a new problem for compile-testing without CONFIG_OF. Adding back the OF dependency avoids the regression. > The platform selects Samsung pinctrl but it does not select > GPIOLIB. Possible fixes are: > 1. Do not select Samsung pinctrl from the platform (but have some > default), so on compile test build it might not work. > 2. Select GPIOLIB from the platform (ARMv7 Exynos does it). > 3. Select GPIOLIB from here - this is current proposal. Agreed, either 2. or 3. is fine, as long as you keep the CONFIG_OF dependency. Arnd _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-04-20 13:26 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-04-20 11:55 [PATCH] pinctrl: samsung: fix missing GPIOLIB on ARM64 Exynos config Krzysztof Kozlowski 2022-04-20 11:55 ` Krzysztof Kozlowski 2022-04-20 12:10 ` Arnd Bergmann 2022-04-20 12:10 ` Arnd Bergmann 2022-04-20 12:13 ` Krzysztof Kozlowski 2022-04-20 12:13 ` Krzysztof Kozlowski 2022-04-20 13:25 ` Arnd Bergmann [this message] 2022-04-20 13:25 ` Arnd Bergmann
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