Evolution-X-Devices/kernel_xiaomi_raphael
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msm: 8x55: put reason for boot in procfs from SMEM

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During board initialization read the shared memory item
SMEM_POWER_ON_STATUS_INFO and place it in the procfs at
/proc/sys/kernel/boot_reason

The data item is an integer with a bit being set to identify the reason
the device was powered on. The values of this data item is defined in
the document Document/arm/msm/boot.txt, the following is the data in the
documentation file.

power_on_status values set by the PMIC for power on event:
----------------------------------------------------------
0x01 -- keyboard power on
0x02 -- RTC alarm
0x04 -- cable power on
0x08 -- SMPL
0x10 -- Watch Dog timeout
0x20 -- USB charger
0x40 -- Wall charger
0xFF -- error reading power_on_status value

Change-Id: I59e665f92e6e29f7dfef4380314f676a2d92c94b
Signed-off-by: Rick Adams <rgadams@codeaurora.org>
This commit is contained in:
Rick Adams
2010-09-28 10:21:07 -07:00
committed by Prasad Sodagudi
parent 3548211ed0
commit baa19dec9e
7 changed files with 53 additions and 0 deletions
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kernel/sysctl_binary.c
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@@ -139,6 +139,7 @@ static const struct bin_table bin_kern_table[] = {
{ CTL_INT, KERN_MAX_LOCK_DEPTH, "max_lock_depth" },
{ CTL_INT, KERN_PANIC_ON_NMI, "panic_on_unrecovered_nmi" },
{ CTL_INT, KERN_PANIC_ON_WARN, "panic_on_warn" },
{ CTL_INT, KERN_BOOT_REASON, "boot_reason" },
{}
};