From 026feadbe3f804ec589f2e93fd15af5cbb96dbba Mon Sep 17 00:00:00 2001
From: David Sidrane <david_s5@nscdg.com>
Date: Wed, 16 Jan 2019 18:10:13 -0600
Subject: [PATCH] arch/arm/src/imxrt/imxrt_lpi2c.c:  I2C Reset rework

---
 arch/arm/src/imxrt/imxrt_lpi2c.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/arch/arm/src/imxrt/imxrt_lpi2c.c b/arch/arm/src/imxrt/imxrt_lpi2c.c
index 1bcff9eaec..2899d4e055 100644
--- a/arch/arm/src/imxrt/imxrt_lpi2c.c
+++ b/arch/arm/src/imxrt/imxrt_lpi2c.c
@@ -126,6 +126,16 @@
 #define LPI2C_MASTER    1
 #define LPI2C_SLAVE     2
 
+#define MKI2C_OUTPUT(p) (((p) & GPIO_PADMUX_MASK) | \
+                         IOMUX_OPENDRAIN | IOMUX_DRIVE_33OHM | \
+                         IOMUX_SLEW_SLOW | (5 << GPIO_ALT_SHIFT) | \
+                         IOMUX_PULL_NONE | GPIO_OUTPUT_ONE)
+
+#define MKI2C_INPUT(p) (((p) & GPIO_PADMUX_MASK) | \
+                        IOMUX_DRIVE_HIZ | IOMUX_SLEW_SLOW | \
+                        IOMUX_CMOS_INPUT | (5 << GPIO_ALT_SHIFT) | \
+                        IOMUX_PULL_NONE)
+
 /************************************************************************************
  * Private Types
  ************************************************************************************/
@@ -1785,8 +1795,11 @@ static int imxrt_lpi2c_reset(FAR struct i2c_master_s *dev)
 
   /* Revert the GPIO configuration. */
 
-  imxrt_unconfig_gpio(sda_gpio);
-  imxrt_unconfig_gpio(scl_gpio);
+  sda_gpio = MKI2C_INPUT(sda_gpio);
+  scl_gpio = MKI2C_INPUT(scl_gpio);
+
+  imxrt_config_gpio(sda_gpio);
+  imxrt_config_gpio(scl_gpio);
 
   /* Re-init the port */