From ff3a793c196b9eeaa6a03fde94550daea6cdae58 Mon Sep 17 00:00:00 2001
From: Astro <astro@spaceboyz.net>
Date: Sat, 14 Sep 2019 02:19:18 +0200
Subject: [PATCH] ad7172: restrict macro input to remove cast

---
 firmware/src/ad7172/regs.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/firmware/src/ad7172/regs.rs b/firmware/src/ad7172/regs.rs
index d7c8564..887d622 100644
--- a/firmware/src/ad7172/regs.rs
+++ b/firmware/src/ad7172/regs.rs
@@ -39,12 +39,12 @@ macro_rules! def_reg {
             }
         }
     };
-    ($Reg: ident, $index: ty, $reg: ident, $addr: expr, $size: expr) => {
-        pub struct $Reg { pub index: $index, }
+    ($Reg: ident, u8, $reg: ident, $addr: expr, $size: expr) => {
+        pub struct $Reg { pub index: u8, }
         impl Register for $Reg {
             type Data = $reg::Data;
             fn address(&self) -> u8 {
-                $addr + (self.index as u8)
+                $addr + self.index
             }
         }
         mod $reg {