From 936473b68adb3a526846ff30233936dc3c52de25 Mon Sep 17 00:00:00 2001
From: chemicstry <chemicstry@gmail.com>
Date: Wed, 10 Aug 2022 12:36:15 +0300
Subject: [PATCH] Make sda/scl pullups separate as in nRF HAL

---
 embassy-stm32/src/i2c/v1.rs | 31 ++++++++++++++++++++++---------
 embassy-stm32/src/i2c/v2.rs | 31 ++++++++++++++++++++++---------
 2 files changed, 44 insertions(+), 18 deletions(-)

diff --git a/embassy-stm32/src/i2c/v1.rs b/embassy-stm32/src/i2c/v1.rs
index 5b3eb2f81..9dc75789a 100644
--- a/embassy-stm32/src/i2c/v1.rs
+++ b/embassy-stm32/src/i2c/v1.rs
@@ -13,12 +13,16 @@ use crate::Peripheral;
 #[non_exhaustive]
 #[derive(Copy, Clone)]
 pub struct Config {
-    pullup_enable: bool,
+    pub sda_pullup: bool,
+    pub scl_pullup: bool,
 }
 
 impl Default for Config {
     fn default() -> Self {
-        Self { pullup_enable: true }
+        Self {
+            sda_pullup: false,
+            scl_pullup: false,
+        }
     }
 }
 
@@ -47,14 +51,23 @@ impl<'d, T: Instance> I2c<'d, T> {
         T::enable();
         T::reset();
 
-        let pull = match config.pullup_enable {
-            true => Pull::Up,
-            false => Pull::None,
-        };
-
         unsafe {
-            scl.set_as_af_pull(scl.af_num(), AFType::OutputOpenDrain, pull);
-            sda.set_as_af_pull(sda.af_num(), AFType::OutputOpenDrain, pull);
+            scl.set_as_af_pull(
+                scl.af_num(),
+                AFType::OutputOpenDrain,
+                match config.scl_pullup {
+                    true => Pull::Up,
+                    false => Pull::None,
+                },
+            );
+            sda.set_as_af_pull(
+                sda.af_num(),
+                AFType::OutputOpenDrain,
+                match config.sda_pullup {
+                    true => Pull::Up,
+                    false => Pull::None,
+                },
+            );
         }
 
         unsafe {
diff --git a/embassy-stm32/src/i2c/v2.rs b/embassy-stm32/src/i2c/v2.rs
index 7c1033e0b..b4303d3d4 100644
--- a/embassy-stm32/src/i2c/v2.rs
+++ b/embassy-stm32/src/i2c/v2.rs
@@ -20,12 +20,16 @@ use crate::Peripheral;
 #[non_exhaustive]
 #[derive(Copy, Clone)]
 pub struct Config {
-    pullup_enable: bool,
+    pub sda_pullup: bool,
+    pub scl_pullup: bool,
 }
 
 impl Default for Config {
     fn default() -> Self {
-        Self { pullup_enable: true }
+        Self {
+            sda_pullup: false,
+            scl_pullup: false,
+        }
     }
 }
 
@@ -66,14 +70,23 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
         T::enable();
         T::reset();
 
-        let pull = match config.pullup_enable {
-            true => Pull::Up,
-            false => Pull::None,
-        };
-
         unsafe {
-            scl.set_as_af_pull(scl.af_num(), AFType::OutputOpenDrain, pull);
-            sda.set_as_af_pull(sda.af_num(), AFType::OutputOpenDrain, pull);
+            scl.set_as_af_pull(
+                scl.af_num(),
+                AFType::OutputOpenDrain,
+                match config.scl_pullup {
+                    true => Pull::Up,
+                    false => Pull::None,
+                },
+            );
+            sda.set_as_af_pull(
+                sda.af_num(),
+                AFType::OutputOpenDrain,
+                match config.sda_pullup {
+                    true => Pull::Up,
+                    false => Pull::None,
+                },
+            );
         }
 
         unsafe {