950-0443-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch

From afea1f84cbda94c47ba4a8f84d16c4330e145a0a 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
@@ -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