From e930acdcc3301eeda0ab9b22a18fcf8732f08b9f Mon Sep 17 00:00:00 2001 From: David Weinehall Date: Thu, 7 Dec 2006 14:00:47 -0800 Subject: [PATCH] ARM: OMAP: Add support for boot reason Add support for boot reason Signed-off-by: David Weinehall Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/bootreason.c | 79 +++++++++++++++++++++++++++++++++++++++ 1 files changed, 79 insertions(+), 0 deletions(-) diff --git a/arch/arm/plat-omap/bootreason.c b/arch/arm/plat-omap/bootreason.c new file mode 100644 index 0000000..253dfcf --- /dev/null +++ b/arch/arm/plat-omap/bootreason.c @@ -0,0 +1,79 @@ +/* + * linux/arch/arm/plat-omap/bootreason.c + * + * OMAP Bootreason passing + * + * Copyright (c) 2004 Nokia + * + * Written by David Weinehall + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include +#include +#include + +static char boot_reason[16]; + +static int omap_bootreason_read_proc(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + int len = 0; + + len += sprintf(page + len, "%s\n", boot_reason); + + *start = page + off; + + if (len > off) + len -= off; + else + len = 0; + + return len < count ? len : count; +} + +static int __init bootreason_init(void) +{ + const struct omap_boot_reason_config *cfg; + int reason_valid = 0; + + cfg = omap_get_config(OMAP_TAG_BOOT_REASON, struct omap_boot_reason_config); + if (cfg != NULL) { + strncpy(boot_reason, cfg->reason_str, sizeof(cfg->reason_str)); + boot_reason[sizeof(cfg->reason_str)] = 0; + reason_valid = 1; + } else { + /* Read the boot reason from the OMAP registers */ + } + + if (!reason_valid) + return -ENOENT; + + printk(KERN_INFO "Bootup reason: %s\n", boot_reason); + + if (!create_proc_read_entry("bootreason", S_IRUGO, NULL, + omap_bootreason_read_proc, NULL)) + return -ENOMEM; + + return 0; +} + +late_initcall(bootreason_init); -- 1.4.4.2