dm: Add a demonstration/example driver

As an example of how to write a uclass and a driver, provide a demo version
of each, accessible through the 'demo' command.

To use these with driver model, define CONFIG_CMD_DEMO and CONFIG_DM_DEMO.

The two demo drivers are enabled with CONFIG_DM_DEMO_SIMPLE and
CONFIG_DM_DEMO_SHAPE.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com>
Signed-off-by: Viktor Křivák <viktor.krivak@gmail.com>
Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/demo/demo-simple.c b/drivers/demo/demo-simple.c
new file mode 100644
index 0000000..6ba8131
--- /dev/null
+++ b/drivers/demo/demo-simple.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2013 Google, Inc
+ *
+ * (C) Copyright 2012
+ * Pavel Herrmann <morpheus.ibis@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm-demo.h>
+#include <asm/io.h>
+
+static int simple_hello(struct device *dev, int ch)
+{
+	const struct dm_demo_pdata *pdata = dev_get_platdata(dev);
+
+	printf("Hello from %08x: %s %d\n", map_to_sysmem(dev), pdata->colour,
+	       pdata->sides);
+
+	return 0;
+}
+
+static const struct demo_ops simple_ops = {
+	.hello = simple_hello,
+};
+
+static int demo_shape_ofdata_to_platdata(struct device *dev)
+{
+	/* Parse the data that is common with all demo devices */
+	return demo_parse_dt(dev);
+}
+
+static const struct device_id demo_shape_id[] = {
+	{ "demo-simple", 0 },
+	{ },
+};
+
+U_BOOT_DRIVER(demo_simple_drv) = {
+	.name	= "demo_simple_drv",
+	.of_match = demo_shape_id,
+	.id	= UCLASS_DEMO,
+	.ofdata_to_platdata = demo_shape_ofdata_to_platdata,
+	.ops	= &simple_ops,
+	.platdata_auto_alloc_size = sizeof(struct dm_demo_pdata),
+};