From 39f7611fecc55cbde02c8a84f7c12861abe31b53 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Wed, 26 Feb 2014 15:59:23 -0700
Subject: dm: Add a demonstration/example driver
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

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>
---
 drivers/demo/demo-uclass.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 drivers/demo/demo-uclass.c

(limited to 'drivers/demo/demo-uclass.c')

diff --git a/drivers/demo/demo-uclass.c b/drivers/demo/demo-uclass.c
new file mode 100644
index 0000000..48588be
--- /dev/null
+++ b/drivers/demo/demo-uclass.c
@@ -0,0 +1,58 @@
+/*
+ * 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 <errno.h>
+#include <fdtdec.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <linux/list.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+UCLASS_DRIVER(demo) = {
+	.id		= UCLASS_DEMO,
+};
+
+int demo_hello(struct device *dev, int ch)
+{
+	const struct demo_ops *ops = device_get_ops(dev);
+
+	if (!ops->hello)
+		return -ENOSYS;
+
+	return ops->hello(dev, ch);
+}
+
+int demo_status(struct device *dev, int *status)
+{
+	const struct demo_ops *ops = device_get_ops(dev);
+
+	if (!ops->status)
+		return -ENOSYS;
+
+	return ops->status(dev, status);
+}
+
+int demo_parse_dt(struct device *dev)
+{
+	struct dm_demo_pdata *pdata = dev_get_platdata(dev);
+	int dn = dev->of_offset;
+
+	pdata->sides = fdtdec_get_int(gd->fdt_blob, dn, "sides", 0);
+	pdata->colour = fdt_getprop(gd->fdt_blob, dn, "colour", NULL);
+	if (!pdata->sides || !pdata->colour) {
+		debug("%s: Invalid device tree data\n", __func__);
+		return -EINVAL;
+	}
+
+	return 0;
+}
-- 
cgit v1.1