Simple routine to retrieve a DeviceState object on a SPI bus using its
CS index. It will be useful for the board to wire the CS lines.
Cc: Alistair Francis <alistair@alistair23.me>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
#define TYPE_SSI_BUS "SSI"
OBJECT_DECLARE_SIMPLE_TYPE(SSIBus, SSI_BUS)
+DeviceState *ssi_get_cs(SSIBus *bus, uint8_t cs_index)
+{
+ BusState *b = BUS(bus);
+ BusChild *kid;
+
+ QTAILQ_FOREACH(kid, &b->children, sibling) {
+ SSIPeripheral *kid_ssi = SSI_PERIPHERAL(kid->child);
+ if (kid_ssi->cs_index == cs_index) {
+ return kid->child;
+ }
+ }
+
+ return NULL;
+}
+
static const TypeInfo ssi_bus_info = {
.name = TYPE_SSI_BUS,
.parent = TYPE_BUS,
uint32_t ssi_transfer(SSIBus *bus, uint32_t val);
+DeviceState *ssi_get_cs(SSIBus *bus, uint8_t cs_index);
+
#endif