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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-02-18 18:04:33 +0100 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-02-19 07:17:21 +0100 |
| commit | 62b7f5931c54e96fca56dd8761b0e466d355c881 (patch) | |
| tree | 1258b392752379833a075df006c2f6d7ac4be51d /target/linux/bcm27xx/patches-5.4/950-0199-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch | |
| parent | 76d1168d0d4b9d76e2ad78c0fc6b255561deb284 (diff) | |
| download | upstream-62b7f5931c54e96fca56dd8761b0e466d355c881.tar.gz upstream-62b7f5931c54e96fca56dd8761b0e466d355c881.tar.bz2 upstream-62b7f5931c54e96fca56dd8761b0e466d355c881.zip | |
bcm27xx: import latest patches from the RPi foundation
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0199-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0199-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0199-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch b/target/linux/bcm27xx/patches-5.4/950-0199-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-5.4/950-0199-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 <phil@raspberrypi.org> +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 <phil@raspberrypi.org> +--- + 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 |