mailbox: implement a sandbox test

This adds a sandbox mailbox implementation (provider), a test client
device, instantiates them both from Sandbox's DT, and adds a DM test
that excercises everything.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org> # v1

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/mailbox/sandbox-mbox-test.c b/drivers/mailbox/sandbox-mbox-test.c
new file mode 100644
index 0000000000..02d161aada
--- /dev/null
+++ b/drivers/mailbox/sandbox-mbox-test.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <mailbox_client.h>
+#include <asm/io.h>
+
+struct sandbox_mbox_test {
+	struct mbox_chan chan;
+};
+
+int sandbox_mbox_test_get(struct udevice *dev)
+{
+	struct sandbox_mbox_test *sbmt = dev_get_priv(dev);
+
+	return mbox_get_by_name(dev, "test", &sbmt->chan);
+}
+
+int sandbox_mbox_test_send(struct udevice *dev, uint32_t msg)
+{
+	struct sandbox_mbox_test *sbmt = dev_get_priv(dev);
+
+	return mbox_send(&sbmt->chan, &msg);
+}
+
+int sandbox_mbox_test_recv(struct udevice *dev, uint32_t *msg)
+{
+	struct sandbox_mbox_test *sbmt = dev_get_priv(dev);
+
+	return mbox_recv(&sbmt->chan, msg, 100);
+}
+
+int sandbox_mbox_test_free(struct udevice *dev)
+{
+	struct sandbox_mbox_test *sbmt = dev_get_priv(dev);
+
+	return mbox_free(&sbmt->chan);
+}
+
+static const struct udevice_id sandbox_mbox_test_ids[] = {
+	{ .compatible = "sandbox,mbox-test" },
+	{ }
+};
+
+U_BOOT_DRIVER(sandbox_mbox_test) = {
+	.name = "sandbox_mbox_test",
+	.id = UCLASS_MISC,
+	.of_match = sandbox_mbox_test_ids,
+	.priv_auto_alloc_size = sizeof(struct sandbox_mbox_test),
+};