From: Stefan Wahren <stefan.wahren@i2se.com> To: Linus Walleij <linus.walleij@linaro.org>, Bartosz Golaszewski <brgl@bgdev.pl>, Florian Fainelli <f.fainelli@gmail.com>, Ray Jui <rjui@broadcom.com>, Scott Branden <sbranden@broadcom.com> Cc: bcm-kernel-feedback-list@broadcom.com, Nicolas Saenz Julienne <nsaenz@kernel.org>, Phil Elwell <phil@raspberrypi.com>, Krzysztof Kozlowski <krzk@kernel.org>, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Stefan Wahren <stefan.wahren@i2se.com> Subject: [PATCH 0/2] gpiolib: of: Introduce hook for missing gpio-ranges Date: Sat, 9 Apr 2022 11:51:27 +0200 [thread overview] Message-ID: <20220409095129.45786-1-stefan.wahren@i2se.com> (raw) This patch series tries to provide backward compatibility for DTB which lacks the gpio-ranges property. The commit ("pinctrl: msm: fix gpio-hog related boot issues") by Christian Lamparter already contains a fallback in case the gpio-ranges property is missing. But this approach doesn't work on BCM2835 with a gpio-hog defined for the SoC GPIOs. Based Christian's on explanation i conclude that the fallback must happen during the gpiochip_add() call and not afterwards. So the approach is to call an optional hook, which can be implemented in the platform driver. This series has been tested on Raspberry Pi 3 B Plus. Changes since RFC: - just add all collected Fixes, Reviewed-by, Tested-by and Acked-by Stefan Wahren (2): gpiolib: of: Introduce hook for missing gpio-ranges pinctrl: bcm2835: implement hook for missing gpio-ranges drivers/gpio/gpiolib-of.c | 5 +++++ drivers/pinctrl/bcm/pinctrl-bcm2835.c | 18 ++++++++++++++++++ include/linux/gpio/driver.h | 12 ++++++++++++ 3 files changed, 35 insertions(+) -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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From: Stefan Wahren <stefan.wahren@i2se.com> To: Linus Walleij <linus.walleij@linaro.org>, Bartosz Golaszewski <brgl@bgdev.pl>, Florian Fainelli <f.fainelli@gmail.com>, Ray Jui <rjui@broadcom.com>, Scott Branden <sbranden@broadcom.com> Cc: bcm-kernel-feedback-list@broadcom.com, Nicolas Saenz Julienne <nsaenz@kernel.org>, Phil Elwell <phil@raspberrypi.com>, Krzysztof Kozlowski <krzk@kernel.org>, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Stefan Wahren <stefan.wahren@i2se.com> Subject: [PATCH 0/2] gpiolib: of: Introduce hook for missing gpio-ranges Date: Sat, 9 Apr 2022 11:51:27 +0200 [thread overview] Message-ID: <20220409095129.45786-1-stefan.wahren@i2se.com> (raw) This patch series tries to provide backward compatibility for DTB which lacks the gpio-ranges property. The commit ("pinctrl: msm: fix gpio-hog related boot issues") by Christian Lamparter already contains a fallback in case the gpio-ranges property is missing. But this approach doesn't work on BCM2835 with a gpio-hog defined for the SoC GPIOs. Based Christian's on explanation i conclude that the fallback must happen during the gpiochip_add() call and not afterwards. So the approach is to call an optional hook, which can be implemented in the platform driver. This series has been tested on Raspberry Pi 3 B Plus. Changes since RFC: - just add all collected Fixes, Reviewed-by, Tested-by and Acked-by Stefan Wahren (2): gpiolib: of: Introduce hook for missing gpio-ranges pinctrl: bcm2835: implement hook for missing gpio-ranges drivers/gpio/gpiolib-of.c | 5 +++++ drivers/pinctrl/bcm/pinctrl-bcm2835.c | 18 ++++++++++++++++++ include/linux/gpio/driver.h | 12 ++++++++++++ 3 files changed, 35 insertions(+) -- 2.25.1
next reply other threads:[~2022-04-09 9:53 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-04-09 9:51 Stefan Wahren [this message] 2022-04-09 9:51 ` [PATCH 0/2] gpiolib: of: Introduce hook for missing gpio-ranges Stefan Wahren 2022-04-09 9:51 ` [PATCH 1/2] " Stefan Wahren 2022-04-09 9:51 ` Stefan Wahren 2022-04-09 9:51 ` [PATCH 2/2] pinctrl: bcm2835: implement " Stefan Wahren 2022-04-09 9:51 ` Stefan Wahren 2022-04-19 21:18 ` [PATCH 0/2] gpiolib: of: Introduce " Linus Walleij 2022-04-19 21:18 ` Linus Walleij
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