From ac1f1cd6a7372154014b86b4f6778710689f9739 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C4=99drzej=20Boczar?= <jboczar@antmicro.com>
Date: Wed, 27 May 2020 12:47:43 +0200
Subject: [PATCH 1/2] zcu104: add I2C

---
 litex_boards/platforms/zcu104.py | 6 ++++++
 litex_boards/targets/zcu104.py   | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/litex_boards/platforms/zcu104.py b/litex_boards/platforms/zcu104.py
index 29cc614..72a2e14 100644
--- a/litex_boards/platforms/zcu104.py
+++ b/litex_boards/platforms/zcu104.py
@@ -43,6 +43,12 @@ _io = [
         IOStandard("LVCMOS18")
     ),
 
+    ("i2c", 1,
+        Subsignal("sda", Pins("P12")),
+        Subsignal("scl", Pins("N12")),
+        IOStandard("LVCMOS33")
+    ),
+
     ("ddram", 0,
         Subsignal("a",       Pins(
             "AH16 AG14 AG15 AF15 AF16 AJ14 AH14 AF17",
diff --git a/litex_boards/targets/zcu104.py b/litex_boards/targets/zcu104.py
index d77a728..a4c2193 100755
--- a/litex_boards/targets/zcu104.py
+++ b/litex_boards/targets/zcu104.py
@@ -16,6 +16,7 @@ from litex.soc.integration.soc_core import *
 from litex.soc.integration.soc_sdram import *
 from litex.soc.integration.builder import *
 from litex.soc.cores.led import LedChaser
+from litex.soc.cores.bitbang import I2CMaster
 
 from litedram.modules import MTA4ATF51264HZ
 from litedram.phy import usddrphy
@@ -77,6 +78,9 @@ class BaseSoC(SoCCore):
                 l2_cache_reverse        = True
             )
 
+            self.submodules.i2c = I2CMaster(platform.request("i2c", 1))
+            self.add_csr("i2c")
+
         # Leds -------------------------------------------------------------------------------------
         self.submodules.leds = LedChaser(
             pads         = Cat(*[platform.request("user_led", i) for i in range(4)]),

From e5578a1ae83dd83785f43d6c216ba73144aeb83d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C4=99drzej=20Boczar?= <jboczar@antmicro.com>
Date: Wed, 27 May 2020 14:31:22 +0200
Subject: [PATCH 2/2] zcu104/platform: change I2C number to 0

---
 litex_boards/platforms/zcu104.py | 2 +-
 litex_boards/targets/zcu104.py   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/litex_boards/platforms/zcu104.py b/litex_boards/platforms/zcu104.py
index 72a2e14..cabfc22 100644
--- a/litex_boards/platforms/zcu104.py
+++ b/litex_boards/platforms/zcu104.py
@@ -43,7 +43,7 @@ _io = [
         IOStandard("LVCMOS18")
     ),
 
-    ("i2c", 1,
+    ("i2c", 0,
         Subsignal("sda", Pins("P12")),
         Subsignal("scl", Pins("N12")),
         IOStandard("LVCMOS33")
diff --git a/litex_boards/targets/zcu104.py b/litex_boards/targets/zcu104.py
index a4c2193..fcf6014 100755
--- a/litex_boards/targets/zcu104.py
+++ b/litex_boards/targets/zcu104.py
@@ -78,7 +78,7 @@ class BaseSoC(SoCCore):
                 l2_cache_reverse        = True
             )
 
-            self.submodules.i2c = I2CMaster(platform.request("i2c", 1))
+            self.submodules.i2c = I2CMaster(platform.request("i2c"))
             self.add_csr("i2c")
 
         # Leds -------------------------------------------------------------------------------------