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https://github.com/AsahiLinux/u-boot
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a02af4aeec
Add a new 'demo light' command which uses GPIOs to control imaginary lights. Each light is assigned a bit number in the overall value. This provides an example driver for using the new GPIO API. Signed-off-by: Simon Glass <sjg@chromium.org>
129 lines
2.8 KiB
C
129 lines
2.8 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 udevice *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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static int do_demo_light(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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int light;
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int ret;
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if (argc) {
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light = simple_strtoul(argv[0], NULL, 16);
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ret = demo_set_light(demo_dev, light);
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} else {
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ret = demo_get_light(demo_dev);
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if (ret >= 0) {
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printf("Light: %x\n", ret);
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ret = 0;
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}
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}
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return ret;
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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 udevice *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(light, 2, 1, do_demo_light, "", ""),
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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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} else {
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demo_dev = NULL;
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if (demo_cmd->cmd != do_demo_list)
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return CMD_RET_USAGE;
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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 light [<num>] Set or get the lights\n"
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"demo status <num> Get demo device status\n"
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"demo list List available demo devices"
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);
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