From f6c24bc802f2cb5ec959a768b60dadc957f113cb Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Wed, 24 Oct 2018 10:20:19 +0200
Subject: I2C: Add support for manual / always-on gpio pullups

---
 src/arch/msp430fr5969lp/driver/i2c.cc | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/arch/msp430fr5969lp')

diff --git a/src/arch/msp430fr5969lp/driver/i2c.cc b/src/arch/msp430fr5969lp/driver/i2c.cc
index 5a47770..cb6fa79 100644
--- a/src/arch/msp430fr5969lp/driver/i2c.cc
+++ b/src/arch/msp430fr5969lp/driver/i2c.cc
@@ -10,6 +10,10 @@ volatile unsigned short old_ifg = 0;
 
 signed char I2C::setup()
 {
+#ifdef I2C_PULLUP_FIXED_GPIO
+	P1DIR |= BIT4 | BIT5;
+	P1OUT |= BIT4 | BIT5;
+#endif
 	UCB0CTL1 = UCSWRST;
 	UCB0CTLW0 = UCMODE_3 | UCMST | UCSYNC | UCSSEL_2 | UCSWRST | UCCLTO_1;
 	UCB0BRW = (F_CPU / F_I2C) - 1;
-- 
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