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>
diff --git a/common/Makefile b/common/Makefile
index ca9af13..04e9cdd 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -64,6 +64,7 @@
obj-$(CONFIG_CMD_CPLBINFO) += cmd_cplbinfo.o
obj-$(CONFIG_DATAFLASH_MMC_SELECT) += cmd_dataflash_mmc_mux.o
obj-$(CONFIG_CMD_DATE) += cmd_date.o
+obj-$(CONFIG_CMD_DEMO) += cmd_demo.o
obj-$(CONFIG_CMD_SOUND) += cmd_sound.o
ifdef CONFIG_4xx
obj-$(CONFIG_CMD_SETGETDCR) += cmd_dcr.o
diff --git a/common/cmd_demo.c b/common/cmd_demo.c
new file mode 100644
index 0000000..a3bba7f
--- /dev/null
+++ b/common/cmd_demo.c
@@ -0,0 +1,102 @@
+/*
+ * 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-demo.h>
+#include <asm/io.h>
+
+struct device *demo_dev;
+
+static int do_demo_hello(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ int ch = 0;
+
+ if (argc)
+ ch = *argv[0];
+
+ return demo_hello(demo_dev, ch);
+}
+
+static int do_demo_status(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ int status;
+ int ret;
+
+ ret = demo_status(demo_dev, &status);
+ if (ret)
+ return ret;
+
+ printf("Status: %d\n", status);
+
+ return 0;
+}
+
+int do_demo_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ struct device *dev;
+ int i, ret;
+
+ puts("Demo uclass entries:\n");
+
+ for (i = 0, ret = uclass_first_device(UCLASS_DEMO, &dev);
+ dev;
+ ret = uclass_next_device(&dev)) {
+ printf("entry %d - instance %08x, ops %08x, platdata %08x\n",
+ i++, map_to_sysmem(dev),
+ map_to_sysmem(dev->driver->ops),
+ map_to_sysmem(dev_get_platdata(dev)));
+ }
+
+ return cmd_process_error(cmdtp, ret);
+}
+
+static cmd_tbl_t demo_commands[] = {
+ U_BOOT_CMD_MKENT(list, 0, 1, do_demo_list, "", ""),
+ U_BOOT_CMD_MKENT(hello, 2, 1, do_demo_hello, "", ""),
+ U_BOOT_CMD_MKENT(status, 1, 1, do_demo_status, "", ""),
+};
+
+static int do_demo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ cmd_tbl_t *demo_cmd;
+ int devnum = 0;
+ int ret;
+
+ if (argc < 2)
+ return CMD_RET_USAGE;
+ demo_cmd = find_cmd_tbl(argv[1], demo_commands,
+ ARRAY_SIZE(demo_commands));
+ argc -= 2;
+ argv += 2;
+ if (!demo_cmd || argc > demo_cmd->maxargs)
+ return CMD_RET_USAGE;
+
+ if (argc) {
+ devnum = simple_strtoul(argv[0], NULL, 10);
+ ret = uclass_get_device(UCLASS_DEMO, devnum, &demo_dev);
+ if (ret)
+ return cmd_process_error(cmdtp, ret);
+ argc--;
+ argv++;
+ }
+
+ ret = demo_cmd->cmd(demo_cmd, flag, argc, argv);
+
+ return cmd_process_error(demo_cmd, ret);
+}
+
+U_BOOT_CMD(
+ demo, 4, 1, do_demo,
+ "Driver model (dm) demo operations",
+ "list List available demo devices\n"
+ "demo hello <num> [<char>] Say hello\n"
+ "demo status <num> Get demo device status"
+);