On 6/29/23 13:09, Philippe Mathieu-Daudé wrote:
On 7/6/23 06:39, Cédric Le Goater wrote:
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>
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
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 9e0706a5248c..01662521b09a 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, uint8_t addr);
Revisiting this patch, I now think this should be:
qemu_irq ssi_get_cs(SSIBus *bus, uint8_t chipselect);
The device is needed for some other use. See :
[PATCH v2 10/12] aspeed: Get the BlockBackend of FMC0 from the flash device
C.
#endif
diff --git a/hw/ssi/ssi.c b/hw/ssi/ssi.c
index d4409535429c..7c71fce0db90 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, uint8_t 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;
and:
return qdev_get_gpio_in_named(kid->child,
SSI_GPIO_CS, 0);
+ }
+ }
+
+ return NULL;
+}
+
static const TypeInfo ssi_bus_info = {
.name = TYPE_SSI_BUS,
.parent = TYPE_BUS,
