Add driver to demonstrate use of rpmsg framework.
Signed-off-by: Tanmay Shah <tanmay.s...@amd.com>
---
drivers/rpmsg/Kconfig | 8 ++++
drivers/rpmsg/Makefile | 3 ++
drivers/rpmsg/rpmsg_sample_client.c | 63 +++++++++++++++++++++++++++++
3 files changed, 74 insertions(+)
create mode 100644 drivers/rpmsg/rpmsg_sample_client.c
diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig
index 4efb8dfcd7..808cd16275 100644
--- a/drivers/rpmsg/Kconfig
+++ b/drivers/rpmsg/Kconfig
@@ -28,4 +28,12 @@ config RPMSG_SANDBOX
Say 'y' here to add sandbox driver for RPMsg framework used
for dummy communication with remote processor on sandbox platform
+config RPMSG_SAMPLE_CLIENT
+ bool "Sample RPMsg client driver"
+ depends on DM
+ select RPMSG
+ help
+ Say 'y' here to enable driver that demonstrate use of RPMsg framework.
+ This driver uses RPMsg APIs to communicate with remote processor.
+
endmenu
diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile
index 21611725ea..53af0f7ea6 100644
--- a/drivers/rpmsg/Makefile
+++ b/drivers/rpmsg/Makefile
@@ -6,5 +6,8 @@ obj-$(CONFIG_RPMSG) += rpmsg-uclass.o
obj-$(CONFIG_RPMSG_SANDBOX) += sandbox_test_rpmsg.o
+# Sample driver demonstrate how to use rpmsg framework
+obj-$(CONFIG_RPMSG_SAMPLE_CLIENT) += rpmsg_sample_client.o
+
# virtio driver for rpmsg
obj-$(CONFIG_VIRTIO_RPMSG_BUS) += virtio_rpmsg_bus.o
diff --git a/drivers/rpmsg/rpmsg_sample_client.c
b/drivers/rpmsg/rpmsg_sample_client.c
new file mode 100644
index 0000000000..ae591dbdde
--- /dev/null
+++ b/drivers/rpmsg/rpmsg_sample_client.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ * Copyright (C) 2023, Advanced Micro Devices, Inc.
+ *
+ * Sample client that shows use of rpmsg APIs
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <log.h>
+#include <malloc.h>
+#include <rpmsg.h>
+#include <dm/device-internal.h>
+#include <dm/uclass.h>
+#include <dm/uclass-internal.h>
+#include <linux/delay.h>
+
+static int rpmsg_rx_callback(void *buf, int msg_len, u32 msgs_received)
+{
+ printf("APU: rx: %s\n", (char *)buf);
+
+ return 0;
+}
+
+static int rpmsg_sample_client_probe(struct udevice *udev)
+{
+ char data[80] = {0};
+ int i;
+
+ /* Initialize rpmsg for core 0 */
+ rpmsg_init(0);
+
+ /* wait for RPU to initialize vdev */
+ mdelay(20);
+
+ /* assume rpmsg init is already done */
+ for (i = 1; i < 5; i++) {
+ sprintf(data, "rpmsg buf %d", i);
+ printf("APU: tx: %s\n", data);
+ rpmsg_send(0, data, strlen(data));
+
+ /* 20ms delay before receiving the data */
+ mdelay(20);
+
+ rpmsg_recv(0, rpmsg_rx_callback);
+ printf("\n");
+ }
+ return 0;
+}
+
+U_BOOT_DRIVER(rpmsg_sample_client) = {
+ .name = "rpmsg-sample-client",
+ .id = UCLASS_MISC,
+ .probe = rpmsg_sample_client_probe,
+ .flags = DM_FLAG_PRE_RELOC,
+};
+
+U_BOOT_DRVINFO(rpmsg_sample_client) = {
+ .name = "rpmsg-sample-client",
+};
--
2.25.1
