drivers: Add AXI uclass
Add a uclass for AXI (Advanced eXtensible Interface) busses, and a
driver for the gdsys IHS AXI bus on IHS FPGAs.
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/axi/axi-uclass.c b/drivers/axi/axi-uclass.c
new file mode 100644
index 0000000..af8acd9
--- /dev/null
+++ b/drivers/axi/axi-uclass.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2017
+ * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <axi.h>
+
+int axi_read(struct udevice *dev, ulong address, void *data,
+ enum axi_size_t size)
+{
+ struct axi_ops *ops = axi_get_ops(dev);
+
+ if (!ops->read)
+ return -ENOSYS;
+
+ return ops->read(dev, address, data, size);
+}
+
+int axi_write(struct udevice *dev, ulong address, void *data,
+ enum axi_size_t size)
+{
+ struct axi_ops *ops = axi_get_ops(dev);
+
+ if (!ops->write)
+ return -ENOSYS;
+
+ return ops->write(dev, address, data, size);
+}
+
+UCLASS_DRIVER(axi) = {
+ .id = UCLASS_AXI,
+ .name = "axi",
+ .post_bind = dm_scan_fdt_dev,
+ .flags = DM_UC_FLAG_SEQ_ALIAS,
+};
+