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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2019-07-09 20:32:28 +0200 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2019-07-14 12:44:14 +0200 |
| commit | 42954857190b9df16d9d873ecc7f6cc38e013e44 (patch) | |
| tree | 98c588f629ff534d458eb0884782ea99672d7634 /target/linux/brcm2708/patches-4.19/950-0521-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch | |
| parent | f1875e902d0afb7d9b9e5285b4fd8da7f6c5e30a (diff) | |
| download | upstream-42954857190b9df16d9d873ecc7f6cc38e013e44.tar.gz upstream-42954857190b9df16d9d873ecc7f6cc38e013e44.tar.bz2 upstream-42954857190b9df16d9d873ecc7f6cc38e013e44.zip | |
brcm2708: add linux 4.19 support
Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0521-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0521-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0521-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch b/target/linux/brcm2708/patches-4.19/950-0521-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch new file mode 100644 index 0000000000..7cb7e88d7e --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0521-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch @@ -0,0 +1,27 @@ +From d4b6aeeb564bcc56316ba15eaa62d25400dde175 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Wed, 12 Jun 2019 17:15:05 +0100 +Subject: [PATCH 521/703] 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 +@@ -33,7 +33,7 @@ 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 |