From a1383655cfaa71609d6236ae0fcf3b6047462b98 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Sat, 29 Feb 2020 09:25:20 +0100 Subject: bcm27xx: add linux 5.4 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Tested on bcm2710 (Raspberry Pi 3B). Signed-off-by: Álvaro Fernández Rojas --- ...pio-Make-GPIO-an-output-for-strong-pullup.patch | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.4/950-0202-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch (limited to 'target/linux/bcm27xx/patches-5.4/950-0202-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch') diff --git a/target/linux/bcm27xx/patches-5.4/950-0202-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch b/target/linux/bcm27xx/patches-5.4/950-0202-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch new file mode 100644 index 0000000000..c8d656a1cf --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0202-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch @@ -0,0 +1,27 @@ +From db2d840e64afb069ae3debab013610cce05ac099 Mon Sep 17 00:00:00 2001 +From: Phil Elwell +Date: Wed, 12 Jun 2019 17:15:05 +0100 +Subject: [PATCH] w1: w1-gpio: Make GPIO an output for strong pullup + +The logic to drive the data line high to implement a strong pullup +assumed that the pin was already an output - setting a value does +not change an input. + +See: https://github.com/raspberrypi/firmware/issues/1143 + +Signed-off-by: Phil Elwell +--- + drivers/w1/masters/w1-gpio.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/w1/masters/w1-gpio.c ++++ b/drivers/w1/masters/w1-gpio.c +@@ -30,7 +30,7 @@ static u8 w1_gpio_set_pullup(void *data, + * This will OVERRIDE open drain emulation and force-pull + * the line high for some time. + */ +- gpiod_set_raw_value(pdata->gpiod, 1); ++ gpiod_direction_output_raw(pdata->gpiod, 1); + msleep(pdata->pullup_duration); + /* + * This will simply set the line as input since we are doing -- cgit v1.2.3