1 files changed, 3 insertions, 5 deletions
diff --git a/gpio.s b/gpio.s
index 1ef296c..32e2c37 100644
--- a/gpio.s
+++ b/gpio.s
@@ -2,7 +2,7 @@
 .cpu cortex-m0plus
 .thumb
 
-.equ RESETS_BASE,     0x4000c000
+.equ RESETS_BASE, 0x4000c000
 .equ RESET_OFST,      0x0
 .equ RESET_DONE_OFST, 0x8
 
@@ -12,14 +12,12 @@
 .global setup_gpio
 
 setup_gpio:
-  // clear reset
   ldr r1, =(RESETS_BASE + ATOMIC_CLEAR)
-  movs r0, 0x20 // IO_BANK0 is bit 5
+  movs r0, 0b1 << 5 // IO_BANK0
   str r0, [r1, RESET_OFST]
   ldr r1, =RESETS_BASE
 1:
   ldr r2, [r1, RESET_DONE_OFST]
-  tst r0, r2 // IO_BANK0 is still bit 5
-  // wait for reset done
+  tst r2, r0
   beq 1b
   bx lr