Don't "unselect" left-hand rows

[qmk_firmware.git] / keyboards / ergodox_ez / matrix.c

diff --git a/keyboards/ergodox_ez/matrix.c b/keyboards/ergodox_ez/matrix.c
index f0550e9b885e67858ba9558a8f640aea078dd690..e1017113343feedd3e9daff0b2d744e5adaaea23 100644 (file)
--- a/keyboards/ergodox_ez/matrix.c
+++ b/keyboards/ergodox_ez/matrix.c
@@ -326,17 +326,9 @@ static matrix_row_t read_cols(uint8_t row)
  */
 static void unselect_rows(void)
 {
-    // unselect on mcp23018
-    if (mcp23018_status) { // if there was an error
-        // do nothing
-    } else {
-        // set all rows hi-Z : 1
-        mcp23018_status = i2c_start(I2C_ADDR_WRITE);    if (mcp23018_status) goto out;
-        mcp23018_status = i2c_write(GPIOA);             if (mcp23018_status) goto out;
-        mcp23018_status = i2c_write(0xFF);              if (mcp23018_status) goto out;
-    out:
-        i2c_stop();
-    }
+    // no need to unselect on mcp23018, because the select step sets all
+    // the other row bits high, and it's not changing to a different
+    // direction
 
     // unselect on teensy
     // Hi-Z(DDR:0, PORT:0) to unselect