---
name: "w1_pre_write"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/w1_pre_write"
---

# w1\_pre\_write(9)

pre-write operations

## NAME

w1\_pre\_write - pre-write operations

## SYNOPSIS

**void w1\_pre\_write(struct w1\_master \*** *dev***);**

## ARGUMENTS

*dev*

the master device

## DESCRIPTION

Pre-write operation, currently only supporting strong pullups. Program the hardware for a strong pullup, if one has been requested and the hardware supports it.

## AUTHOR

**David Fries** \<David@Fries.net\>

Author.

## COPYRIGHT