From 8dfb6dff868943755c9340a4a75a2a8c76a0b56f Mon Sep 17 00:00:00 2001
From: Dario Nieuwenhuis <dirbaio@dirbaio.net>
Date: Wed, 26 May 2021 18:15:05 +0200
Subject: [PATCH] nrf/twim: make pullup configurable, do not enable it by
 default.

---
 embassy-nrf/src/twim.rs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/embassy-nrf/src/twim.rs b/embassy-nrf/src/twim.rs
index 4812b353f..ea3ac7553 100644
--- a/embassy-nrf/src/twim.rs
+++ b/embassy-nrf/src/twim.rs
@@ -30,12 +30,16 @@ pub enum Frequency {
 #[non_exhaustive]
 pub struct Config {
     pub frequency: Frequency,
+    pub sda_pullup: bool,
+    pub scl_pullup: bool,
 }
 
 impl Default for Config {
     fn default() -> Self {
         Self {
             frequency: Frequency::K100,
+            sda_pullup: false,
+            scl_pullup: false,
         }
     }
 }
@@ -61,15 +65,19 @@ impl<'d, T: Instance> Twim<'d, T> {
         sda.conf().write(|w| {
             w.dir().input();
             w.input().connect();
-            w.pull().pullup();
             w.drive().s0d1();
+            if config.sda_pullup {
+                w.pull().pullup();
+            }
             w
         });
         scl.conf().write(|w| {
             w.dir().input();
             w.input().connect();
-            w.pull().pullup();
             w.drive().s0d1();
+            if config.scl_pullup {
+                w.pull().pullup();
+            }
             w
         });