Simple routine to retrieve a DeviceState object on a SPI bus using its
address/cs. It will be useful for the board to wire the CS lines.
Cc: Alistair Francis <alist...@alistair23.me>
Signed-off-by: Cédric Le Goater <c...@kaod.org>
---
include/hw/ssi/ssi.h | 2 ++
hw/ssi/ssi.c | 15 +++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/hw/ssi/ssi.h b/include/hw/ssi/ssi.h
index ffd3a34ba4..c7beabdb09 100644
--- a/include/hw/ssi/ssi.h
+++ b/include/hw/ssi/ssi.h
@@ -112,4 +112,6 @@ SSIBus *ssi_create_bus(DeviceState *parent, const char
*name);
uint32_t ssi_transfer(SSIBus *bus, uint32_t val);
+DeviceState *ssi_get_cs(SSIBus *bus, int addr);
+
#endif
diff --git a/hw/ssi/ssi.c b/hw/ssi/ssi.c
index 9fffe4f27a..a25e064417 100644
--- a/hw/ssi/ssi.c
+++ b/hw/ssi/ssi.c
@@ -27,6 +27,21 @@ struct SSIBus {
#define TYPE_SSI_BUS "SSI"
OBJECT_DECLARE_SIMPLE_TYPE(SSIBus, SSI_BUS)
+DeviceState *ssi_get_cs(SSIBus *bus, int addr)
+{
+ BusState *b = BUS(bus);
+ BusChild *kid;
+
+ QTAILQ_FOREACH(kid, &b->children, sibling) {
+ SSIPeripheral *kid_ssi = SSI_PERIPHERAL(kid->child);
+ if (kid_ssi->addr == addr) {
+ return kid->child;
+ }
+ }
+
+ return NULL;
+}
+
static const TypeInfo ssi_bus_info = {
.name = TYPE_SSI_BUS,
.parent = TYPE_BUS,
--
2.40.0
