Mirrors/u-boot
1
0
Fork 0
mirror of https://source.denx.de/u-boot/u-boot.git synced 2026-06-13 15:03:58 +03:00
Code Issues Packages Projects Releases Wiki Activity

dm: Add a demonstration/example driver

Browse Source 
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>
This commit is contained in:
Simon Glass
2014-02-26 15:59:23 -07:00
committed by Tom Rini
parent 0681195977
commit 39f7611fec
10 changed files with 432 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
common/Makefile
View File

@@ -64,6 +64,7 @@ obj-$(CONFIG_CMD_CONSOLE) += cmd_console.o
obj-$(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

102
common/cmd_demo.c Normal file
View File

@@ -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"
);