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https://github.com/brain-hackers/u-boot-brain
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39f7611fec
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>
103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/*
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* Copyright (c) 2013 Google, Inc
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*
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* (C) Copyright 2012
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* Pavel Herrmann <morpheus.ibis@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm-demo.h>
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#include <asm/io.h>
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struct device *demo_dev;
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static int do_demo_hello(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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int ch = 0;
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if (argc)
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ch = *argv[0];
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return demo_hello(demo_dev, ch);
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}
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static int do_demo_status(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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int status;
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int ret;
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ret = demo_status(demo_dev, &status);
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if (ret)
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return ret;
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printf("Status: %d\n", status);
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return 0;
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}
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int do_demo_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct device *dev;
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int i, ret;
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puts("Demo uclass entries:\n");
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for (i = 0, ret = uclass_first_device(UCLASS_DEMO, &dev);
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dev;
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ret = uclass_next_device(&dev)) {
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printf("entry %d - instance %08x, ops %08x, platdata %08x\n",
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i++, map_to_sysmem(dev),
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map_to_sysmem(dev->driver->ops),
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map_to_sysmem(dev_get_platdata(dev)));
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}
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return cmd_process_error(cmdtp, ret);
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}
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static cmd_tbl_t demo_commands[] = {
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U_BOOT_CMD_MKENT(list, 0, 1, do_demo_list, "", ""),
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U_BOOT_CMD_MKENT(hello, 2, 1, do_demo_hello, "", ""),
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U_BOOT_CMD_MKENT(status, 1, 1, do_demo_status, "", ""),
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};
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static int do_demo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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cmd_tbl_t *demo_cmd;
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int devnum = 0;
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int ret;
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if (argc < 2)
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return CMD_RET_USAGE;
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demo_cmd = find_cmd_tbl(argv[1], demo_commands,
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ARRAY_SIZE(demo_commands));
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argc -= 2;
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argv += 2;
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if (!demo_cmd || argc > demo_cmd->maxargs)
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return CMD_RET_USAGE;
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if (argc) {
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devnum = simple_strtoul(argv[0], NULL, 10);
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ret = uclass_get_device(UCLASS_DEMO, devnum, &demo_dev);
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if (ret)
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return cmd_process_error(cmdtp, ret);
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argc--;
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argv++;
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}
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ret = demo_cmd->cmd(demo_cmd, flag, argc, argv);
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return cmd_process_error(demo_cmd, ret);
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}
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U_BOOT_CMD(
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demo, 4, 1, do_demo,
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"Driver model (dm) demo operations",
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"list List available demo devices\n"
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"demo hello <num> [<char>] Say hello\n"
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"demo status <num> Get demo device status"
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);
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