From d4c63335aec7639c154c5a8e00b5b5f0a10d7f78 Mon Sep 17 00:00:00 2001
From: Harsh Sharma <92harshsharma@gmail.com>
Date: Wed, 13 Jun 2018 13:33:21 -0500
Subject: Applied patch: lora-gateway-v28-skip-IQ-invert

---
 libloragw/src/loragw_fpga.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'libloragw/src')

diff --git a/libloragw/src/loragw_fpga.c b/libloragw/src/loragw_fpga.c
index 465f43e..40b0b2e 100644
--- a/libloragw/src/loragw_fpga.c
+++ b/libloragw/src/loragw_fpga.c
@@ -164,11 +164,14 @@ int lgw_fpga_configure(uint32_t tx_notch_freq) {
         return LGW_REG_ERROR;
     }
 
-    /* Required for Semtech AP2 reference design */
-    x  = lgw_fpga_reg_w(LGW_FPGA_CTRL_INVERT_IQ, 1);
-    if (x != LGW_REG_SUCCESS) {
-        DEBUG_MSG("ERROR: Failed to configure FPGA polarity\n");
-        return LGW_REG_ERROR;
+
+    if (read_fpga_version() > 28) {
+        /* Required for Semtech AP2 reference design and AP1.5 > v28 */
+        x  = lgw_fpga_reg_w(LGW_FPGA_CTRL_INVERT_IQ, 1);
+        if (x != LGW_REG_SUCCESS) {
+            DEBUG_MSG("ERROR: Failed to configure FPGA polarity\n");
+            return LGW_REG_ERROR;
+        }
     }
 
     /* Configure TX notch filter */
-- 
cgit v1.2.3