1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/led/issi/is31fl3733.c b/drivers/led/issi/is31fl3733.c
index 4ddd827ca..c64d03513 100644
--- a/drivers/led/issi/is31fl3733.c
+++ b/drivers/led/issi/is31fl3733.c
@@ -1,6 +1,7 @@
 /* Copyright 2017 Jason Williams
  * Copyright 2018 Jack Humbert
  * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -58,6 +59,12 @@
 
 #ifndef ISSI_PWM_FREQUENCY
 #    define ISSI_PWM_FREQUENCY 0b000  // PFS - IS31FL3733B only
+#ifndef ISSI_SWPULLUP
+#    define ISSI_SWPULLUP PUR_0R
+#endif
+
+#ifndef ISSI_CSPULLUP
+#    define ISSI_CSPULLUP PUR_0R
 #endif
 
 // Transfer buffer for TWITransmitData()
@@ -158,6 +165,10 @@ void IS31FL3733_init(uint8_t addr, uint8_t sync) {
 
     // Select PG3
     IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION);
+    // Set de-ghost pull-up resistors (SWx)
+    IS31FL3733_write_register(addr, ISSI_REG_SWPULLUP, ISSI_SWPULLUP);
+    // Set de-ghost pull-down resistors (CSx)
+    IS31FL3733_write_register(addr, ISSI_REG_CSPULLUP, ISSI_CSPULLUP);
     // Set global current to maximum.
     IS31FL3733_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
     // Disable software shutdown.