From 5914b174a299256683d65b7d6a25520248145120 Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jeremy@system76.com>
Date: Fri, 10 Jan 2020 12:35:28 -0700
Subject: [PATCH] Fix usage of SMBus channel E

---
 src/board/system76/lemp9/gpio.c   | 2 ++
 src/ec/it5570e/include/ec/smbus.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/src/board/system76/lemp9/gpio.c b/src/board/system76/lemp9/gpio.c
index f240fd1..6482c4b 100644
--- a/src/board/system76/lemp9/gpio.c
+++ b/src/board/system76/lemp9/gpio.c
@@ -19,6 +19,8 @@ struct Gpio __code BKL_EN =         GPIO(H, 2);
 void gpio_init() {
     // Enable LPC reset on GPD2
     GCR = 0x04;
+    // Enable SMBus channel 4
+    GCR15 = (1 << 4);
 
     // Set GPIO data
     GPDRA = 0;
diff --git a/src/ec/it5570e/include/ec/smbus.h b/src/ec/it5570e/include/ec/smbus.h
index 22d9c43..673f463 100644
--- a/src/ec/it5570e/include/ec/smbus.h
+++ b/src/ec/it5570e/include/ec/smbus.h
@@ -72,6 +72,8 @@ volatile uint8_t __xdata __at(0x1CA8) PECERCE;
 volatile uint8_t __xdata __at(0x1CA9) SMBPCTLE;
 // Host control 2 for channel E
 volatile uint8_t __xdata __at(0x1CAA) HOCTL2E;
+// SMCLK timing setting for channel E
+volatile uint8_t __xdata __at(0x1CAB) SCLKTSE;
 
 // Timing registers
 volatile uint8_t __xdata __at(0x1C22) SMB4P7USL;