go-packages/go-rpio
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Do minor refactoring

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This commit is contained in:
Drahoslav 2017-11-14 17:06:00 +01:00
parent 896db2ee1c
commit 3e0491354c
1 changed files with 8 additions and 12 deletions
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20
rpio.go
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@ -265,24 +265,19 @@ func Open() (err error) {
var base int64
// Open fd for rw mem access; try gpiomem first
if file, err = os.OpenFile(
"/dev/gpiomem",
os.O_RDWR|os.O_SYNC,
0); os.IsNotExist(err) {
file, err = os.OpenFile(
"/dev/mem",
os.O_RDWR|os.O_SYNC,
0)
base = getGPIOBase()
file, err = os.OpenFile("/dev/gpiomem", os.O_RDWR|os.O_SYNC, 0)
if !os.IsNotExist(err) {
return
}
file, err = os.OpenFile("/dev/mem", os.O_RDWR|os.O_SYNC, 0)
if err != nil {
return
}
// FD can be closed after memory mapping
defer file.Close()
base = getGPIOBase()
memlock.Lock()
defer memlock.Unlock()
@ -292,7 +287,8 @@ func Open() (err error) {
base,
memLength,
syscall.PROT_READ|syscall.PROT_WRITE,
syscall.MAP_SHARED)
syscall.MAP_SHARED,
)
if err != nil {
return