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spi: use a initializer if required by any host

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This commit is contained in:
kunalpowar 2014-05-01 22:44:41 +05:30
parent faa686f01c
commit 42033238e2
4 changed files with 38 additions and 15 deletions
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26
host/generic/spibus.go
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@ -53,24 +53,36 @@ type spiBus struct {
spiTransferData spiIocTransfer
initialized bool
shouldInitialize bool
initializer func() error
}
func spiIocMessageN(n uint32) uint32 {
return (spiIocMessage0 + (n * spiIocIncrementor))
}
func NewSPIBus(spiDevMinor, mode, channel byte, speed, bpw, delay int) embd.SPIBus {
func NewSPIBus(spiDevMinor, mode, channel byte, speed, bpw, delay int, shouldInitialize bool, i func() error) embd.SPIBus {
return &spiBus{
spiDevMinor: spiDevMinor,
mode: mode,
channel: channel,
speed: speed,
bpw: bpw,
delayms: delay,
spiDevMinor: spiDevMinor,
mode: mode,
channel: channel,
speed: speed,
bpw: bpw,
delayms: delay,
shouldInitialize: shouldInitialize,
initializer: i,
}
}
func (b *spiBus) init() error {
if b.shouldInitialize {
if err := b.initializer(); err != nil {
return err
}
b.shouldInitialize = false
}
if b.initialized {
return nil
}