From 4d6ff095684d180221fd924e8ba13fcc77c8366a Mon Sep 17 00:00:00 2001 From: Michael Tretter Date: Fri, 13 Sep 2019 15:14:45 +0200 Subject: commands: add of_overlay command for device tree overlays Add a new command "of_overlay" for applying device tree overlays, because it does not really fit into any other device tree related command and would create a mess with the command options. Signed-off-by: Michael Tretter Signed-off-by: Sascha Hauer --- commands/Kconfig | 12 +++++++ commands/Makefile | 1 + commands/of_overlay.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 102 insertions(+) create mode 100644 commands/of_overlay.c (limited to 'commands') diff --git a/commands/Kconfig b/commands/Kconfig index e03110fd46..298e0fb9e9 100644 --- a/commands/Kconfig +++ b/commands/Kconfig @@ -2088,6 +2088,18 @@ config CMD_OF_FIXUP_STATUS Register a fixup to enable or disable a device tree node. Nodes are enabled on default. Disabled with -d. +config CMD_OF_OVERLAY + tristate + select OF_OVERLAY + prompt "of_overlay" + help + of_overlay - register device tree overlay as fixup + + Usage: of_overlay [-S path] FILE + + Options: + -S path load firmware using this search path + config CMD_OFTREE tristate select OFTREE diff --git a/commands/Makefile b/commands/Makefile index 5cd35b78a7..ebdc437e55 100644 --- a/commands/Makefile +++ b/commands/Makefile @@ -78,6 +78,7 @@ obj-$(CONFIG_CMD_OF_NODE) += of_node.o obj-$(CONFIG_CMD_OF_DUMP) += of_dump.o obj-$(CONFIG_CMD_OF_DISPLAY_TIMINGS) += of_display_timings.o obj-$(CONFIG_CMD_OF_FIXUP_STATUS) += of_fixup_status.o +obj-$(CONFIG_CMD_OF_OVERLAY) += of_overlay.o obj-$(CONFIG_CMD_MAGICVAR) += magicvar.o obj-$(CONFIG_CMD_IOMEM) += iomemport.o obj-$(CONFIG_CMD_LINUX_EXEC) += linux_exec.o diff --git a/commands/of_overlay.c b/commands/of_overlay.c new file mode 100644 index 0000000000..de3c3dcee5 --- /dev/null +++ b/commands/of_overlay.c @@ -0,0 +1,89 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019 Michael Tretter , Pengutronix + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static int do_of_overlay(int argc, char *argv[]) +{ + int opt, ret; + struct fdt_header *fdt; + struct device_node *overlay; + const char *search_path = NULL; + + while ((opt = getopt(argc, argv, "S:")) > 0) { + switch (opt) { + case 'S': + search_path = optarg; + break; + default: + return COMMAND_ERROR_USAGE; + } + } + + if (argc != optind + 1) + return COMMAND_ERROR_USAGE; + + fdt = read_file(argv[optind], NULL); + if (!fdt) { + printf("cannot read %s\n", argv[optind]); + return 1; + } + + overlay = of_unflatten_dtb(fdt); + free(fdt); + if (IS_ERR(overlay)) + return PTR_ERR(overlay); + + if (search_path) { + ret = of_firmware_load_overlay(overlay, search_path); + if (ret) + goto err; + } + + ret = of_register_overlay(overlay); + if (ret) { + printf("cannot apply oftree overlay: %s\n", strerror(-ret)); + goto err; + } + + return 0; + +err: + of_delete_node(overlay); + return ret; +} + +BAREBOX_CMD_HELP_START(of_overlay) +BAREBOX_CMD_HELP_TEXT("Options:") +BAREBOX_CMD_HELP_OPT("-S path", "load firmware using this search path") +BAREBOX_CMD_HELP_END + +BAREBOX_CMD_START(of_overlay) + .cmd = do_of_overlay, + BAREBOX_CMD_DESC("register device tree overlay as fixup") + BAREBOX_CMD_OPTS("[-S path] FILE") + BAREBOX_CMD_GROUP(CMD_GRP_MISC) + BAREBOX_CMD_HELP(cmd_of_overlay_help) +BAREBOX_CMD_END -- cgit v1.2.3