Extra omap code in linux-omap tree

[linux-2.6-omap-h63xx.git] / arch / arm / plat-omap / bootreason.c

diff --git a/arch/arm/plat-omap/bootreason.c b/arch/arm/plat-omap/bootreason.c
new file mode 100644 (file)
index 0000000..d527b1b
--- /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 <david.weinehall@nokia.com>
+ *
+ * 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 <linux/proc_fs.h>
+#include <linux/errno.h>
+#include <mach/board.h>
+
+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);