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ssi: Add slave autoconnect helper

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Added helper function to automatically connect SPI slaves based on the QOM child
nodes of a device. A SSI master device can call this routine to automatically
hook-up all child nodes to its SPI bus.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Crosthwaite 2012-10-01 12:34:37 +10:00
parent fcb5629d3e
commit b4ae3cfa57
4 changed files with 44 additions and 3 deletions
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6
hw/xilinx_spi.c
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@ -320,8 +320,12 @@ static int xilinx_spi_init(SysBusDevice *dev)
XilinxSPI *s = FROM_SYSBUS(typeof(*s), dev);
DB_PRINT("\n");
s->spi = ssi_create_bus(&dev->qdev, "spi");
sysbus_init_irq(dev, &s->irq);
s->cs_lines = g_new(qemu_irq, s->num_cs);
ssi_auto_connect_slaves(DEVICE(s), s->cs_lines, s->spi);
for (i = 0; i < s->num_cs; ++i) {
sysbus_init_irq(dev, &s->cs_lines[i]);
}
@ -331,8 +335,6 @@ static int xilinx_spi_init(SysBusDevice *dev)
s->irqline = -1;
s->spi = ssi_create_bus(&dev->qdev, "spi");
fifo8_create(&s->tx_fifo, FIFO_CAPACITY);
fifo8_create(&s->rx_fifo, FIFO_CAPACITY);