Preempt-RT on OMAP3?

Preempt-RT on OMAP3?

[Hugo Vincent]

Hi everyone,

I'm trying to get the realtime patch set to work on OMAP3 (Gumstix
Overo). Linux-omap 2.6.29 with the RT patches -rt1 or -rt2 work mostly
as is (MUSB and the usb-gadget layer have quite a few problems, and
the realtime self-test stuff picks up a few problems to do with
spinlock usage etc, but most things seem to mostly work correctly for
my needs). Running cyclictest with various types of loads gives an
average latency of ~30-50 usec and worst case up around 300 usec.

Is anyone working on RT on omap3? Is there a more suitable mailing
list for this? Is there a git repo somewhere tracking the work on
2.6.39-rtX for OMAP?

Thanks,
Hugo Vincent

Re: Preempt-RT on OMAP3?

[David Brownell]

On Sunday 05 April 2009, Hugo Vincent wrote:
> I'm trying to get the realtime patch set to work on OMAP3 (Gumstix
> Overo). Linux-omap 2.6.29 with the RT patches -rt1 or -rt2 work mostly
> as is (MUSB and the usb-gadget layer have quite a few problems, and

Like what?  Way back in 2.6.10 MUSB behaved relatively sanely.
But that's a while back.  ;)


> the realtime self-test stuff picks up a few problems to do with
> spinlock usage etc, but most things seem to mostly work correctly for
> my needs). Running cyclictest with various types of loads gives an
> average latency of ~30-50 usec and worst case up around 300 usec.

Re: Preempt-RT on OMAP3?

[Hugo Vincent]

[-- Attachment #1: Type: text/plain, Size: 13288 bytes --]

Here are some of the crashes I've seen. Warning - I'm new to -rt and
to the linux-omap tree, so I'll apologize in advance if these are just
a result of me missing something obvious.

Context: using USB-gadget ethernet (g_ether) over musb (configured as
just peripheral, not OTG). Most of the time it works, but after a
while, or when it encounters a large packet (e.g fping -b30000) it
crashes like so (apparently something to do with receive DMA usage).
Although the fping -b case is kindof pathological, I've seen the same
crash when ssh/scping files across to the board, so it does occur in
real usage.


Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 817 [#1] PREEMPT
Modules linked in: g_ether ftdi_sio usbserial ipv6
CPU: 0    Not tainted  (2.6.29-rt1-omap1-g7648048 #1)
PC is at dma_channel_program+0x90/0x108
LR is at rxstate+0xc8/0x1b4
pc : [<c024c7c0>]    lr : [<c024b760>]    psr: 60000013
sp : cf93be10  ip : cf93be58  fp : cf93be54
r10: 00000000  r9 : 00000000  r8 : 8fa1d002
r7 : 00000200  r6 : cf98b668  r5 : cf98b668  r4 : cf98b600
r3 : 00000000  r2 : 00000000  r1 : 00000000  r0 : cf98b668
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c5387d  Table: 8fa90019  DAC: 00000017
Process IRQ-93 (pid: 191, stack limit = 0xcf93a2e8)
Stack: (0xcf93be10 to 0xcf93c000)
be00:                                     bf062078 c024b8f4 00000000 cf05f3e0
be20: cf85f8e0 cf85f8e0 00000000 cf98b600 cf85f5e0 cf83b000 00000000 00002003
be40: d80ab110 00000001 cf93be94 cf93be58 c024b760 c024c73c 00000000 c02f8d18
be60: cf83b000 60000113 cf93a000 00002003 cf85f5e0 cf83b000 00000003 cf98b668
be80: d80ab110 00000001 cf93bedc cf93be98 c024bfc0 c024b6a4 00000003 00000002
bea0: cf93a000 cf94537c cf83b19c cf83b1d8 c004d80c cf98b650 00000002 00000001
bec0: 8fa1dc02 d80ab000 cf83b000 cf98b600 cf93beec cf93bee0 c02489e4 c024bc9c
bee0: cf93bf3c cf93bef0 c024c988 c024899c 00000002 cf820000 ffffffff c040caa4
bf00: af2001b4 cf94537c d80ab060 00000004 c006b43c c03ebbc8 cf93a000 cf8c09e0
bf20: 0000005d 00000000 0000005d 00000000 cf93bf74 cf93bf40 c007cef0 c024c844
bf40: cfa29e40 00000000 cf93bf84 c03ebbc8 cf93a000 0000005d 0000005d cf8c09e0
bf60: c03ebc20 c04186a4 cf93bf9c cf93bf78 c007d33c c007ce30 c03ebbc8 cf93a000
bf80: 0000005d 00000000 60000113 c03ebc08 cf93bfd4 cf93bfa0 c007d45c c007d2dc
bfa0: 00000000 00000032 00000000 cf93a000 c03ebbc8 c007d390 00000000 00000000
bfc0: 00000000 00000000 cf93bff4 cf93bfd8 c0065b54 c007d39c 00000000 00000000
bfe0: 00000000 00000000 00000000 cf93bff8 c0053b28 c0065b04 017bee08 08f7ef39
Backtrace:
[<c024c730>] (dma_channel_program+0x0/0x108) from [<c024b760>]
(rxstate+0xc8/0x1b4)
[<c024b698>] (rxstate+0x0/0x1b4) from [<c024bfc0>] (musb_g_rx+0x330/0x3ac)
[<c024bc90>] (musb_g_rx+0x0/0x3ac) from [<c02489e4>]
(musb_dma_completion+0x54/0x58)
[<c0248990>] (musb_dma_completion+0x0/0x58) from [<c024c988>]
(dma_controller_irq+0x150/0x18c)
[<c024c838>] (dma_controller_irq+0x0/0x18c) from [<c007cef0>]
(handle_IRQ_event+0xcc/0x1d8)
[<c007ce24>] (handle_IRQ_event+0x0/0x1d8) from [<c007d33c>]
(thread_simple_irq+0x6c/0xc0)
[<c007d2d0>] (thread_simple_irq+0x0/0xc0) from [<c007d45c>] (do_irqd+0xcc/0x334)
[<c007d390>] (do_irqd+0x0/0x334) from [<c0065b54>] (kthread+0x5c/0x94)
[<c0065af8>] (kthread+0x0/0x94) from [<c0053b28>] (do_exit+0x0/0x73c)
 r6:00000000 r5:00000000 r4:00000000
Code: 13a03000 03a03001 1a000002 e3a03000 (e5833000)
---[ end trace af756bf803843539 ]---


After the above crash has been seen, reboot/shutdown or rmmod do this:


Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = cf054000
[00000000] *pgd=8f322031, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#2] PREEMPT
Modules linked in: ftdi_sio usbserial ipv6
CPU: 0    Tainted: G      D     (2.6.29-rt1-omap1-g8dde6bd-dirty #1)
PC is at plist_add+0x5c/0xb0
LR is at task_blocks_on_rt_mutex+0x144/0x204
pc : [<c01bd098>]    lr : [<c0074690>]    psr: 60000093
sp : cfb6dd58  ip : cfb6dd70  fp : cfb6dd6c
r10: cfb6ddbc  r9 : 60000013  r8 : cfb6ddb0
r7 : cf1d0d60  r6 : cfb6ddb0  r5 : cf1d111c  r4 : cfb6ddc4
r3 : fffffffc  r2 : cfb6ddd0  r1 : cf1d111c  r0 : fffffffc
Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 10c5387d  Table: 8f054019  DAC: 00000015
Process reboot (pid: 1335, stack limit = 0xcfb6c2e8)
Stack: (0xcfb6dd58 to 0xcfb6e000)
dd40:                                                       cfb6c000 cf1d111c
dd60: cfb6ddac cfb6dd70 c0074690 c01bd048 00000001 c040e320 00000000 cf83b0d0
dd80: cfa144e0 cf83b0d0 60000013 cfb6c000 0000006c 00000000 00000000 00000000
dda0: cfb6de0c cfb6ddb0 c02f55ac c0074558 00000078 cf83b0d0 cf83b0d0 cf83b0d8
ddc0: cf83b0d8 00000078 cfb6ddc8 cfb6ddc8 cfb6ddd0 cfb6ddd0 cfaba620 cf83b0d0
dde0: 0000006c cf83b0d0 00000000 fee1dead 0000006c c002d0c4 cfb6c000 00000000
de00: cfb6de1c cfb6de10 c02f60f4 c02f54d4 cfb6de34 cfb6de20 c0241964 c02f60c0
de20: c03e1148 c041eaa8 cfb6de44 cfb6de38 c01ee7a0 c0241950 cfb6de5c cfb6de48
de40: c01e9f0c c01ee78c 00000000 28121969 cfb6de6c cfb6de60 c00604dc c01e9eb8
de60: cfb6de84 cfb6de70 c0060530 c00604bc 01234567 01234567 cfb6dfa4 cfb6de88
de80: c00606ec c0060524 cfb6de84 00000000 c00bfa7c cf525e30 cf525e30 c03f0c2c
dea0: 00200200 00100100 cfb6decc cfb6deb8 c00bbb7c c00a7dc4 cfb6dee4 cf525e30
dec0: cfb6dee4 cfb6ded0 c00bbbcc c00bbb30 cf525e30 cf401548 cfb6defc cfb6dee8
dee0: c00bbc3c cf80e688 cf80e620 cf4078a0 cfb6df24 cfb6df00 c00c2f48 c0074a04
df00: c007ff60 cf1aea40 00000008 cf4078a0 cf525e30 cf80e620 cfb6df54 cfb6df28
df20: c00ad63c c00c2f28 00000000 c02f5420 cfb6df5c cf1aea40 00000000 cf881b00
df40: cf1aea40 c002d0c4 cfb6df64 cfb6df58 c00ad67c c00ad480 cfb6df84 cfb6df68
df60: c00aa328 c00ad658 cfb6df84 00000003 cf881b00 cf881b24 cfb6dfa4 cfb6df88
df80: c00aa3dc c00aa2b8 00000000 00000001 00000004 00000058 00000000 cfb6dfa8
dfa0: c002cf40 c0060588 00000000 00000001 fee1dead 28121969 01234567 0000006c
dfc0: 00000000 00000001 00000004 00000058 00000001 00000001 00000000 00000001
dfe0: 400d8620 befd2cc0 00009210 400d8638 60000010 fee1dead cfb6dff4 00000000
Backtrace:
[<c01bd03c>] (plist_add+0x0/0xb0) from [<c0074690>]
(task_blocks_on_rt_mutex+0x144/0x204)
 r5:cf1d111c r4:cfb6c000
[<c007454c>] (task_blocks_on_rt_mutex+0x0/0x204) from [<c02f55ac>]
(rt_spin_lock_slowlock+0xe4/0x27c)
[<c02f54c8>] (rt_spin_lock_slowlock+0x0/0x27c) from [<c02f60f4>]
(rt_spin_lock+0x40/0x44)
[<c02f60b4>] (rt_spin_lock+0x0/0x44) from [<c0241964>] (musb_shutdown+0x20/0x68)
[<c0241944>] (musb_shutdown+0x0/0x68) from [<c01ee7a0>]
(platform_drv_shutdown+0x20/0x24)
 r5:c041eaa8 r4:c03e1148
[<c01ee780>] (platform_drv_shutdown+0x0/0x24) from [<c01e9f0c>]
(device_shutdown+0x60/0xb8)
[<c01e9eac>] (device_shutdown+0x0/0xb8) from [<c00604dc>]
(kernel_restart_prepare+0x2c/0x3c)
 r5:28121969 r4:00000000
[<c00604b0>] (kernel_restart_prepare+0x0/0x3c) from [<c0060530>]
(kernel_restart+0x18/0x4c)
[<c0060518>] (kernel_restart+0x0/0x4c) from [<c00606ec>]
(sys_reboot+0x170/0x1dc)
 r4:01234567
[<c006057c>] (sys_reboot+0x0/0x1dc) from [<c002cf40>]
(ret_fast_syscall+0x0/0x2c)
 r7:00000058 r6:00000004 r5:00000001 r4:00000000
Code: ba000007 e1a00001 0a00000c e1a03000 (e5b32004)
---[ end trace d7d34d233af69b06 ]---
note: reboot[1335] exited with preempt_count 2
Segmentation fault

Finally, there is this crash (when musb is configured as OTG). When
you try to write to several of the sysfs entries, e.g.
/sys/devices/platform/musb_hdrc/mode, the driver crashes. Note that
this one doesn't appear to be limited to just -rt.

root@overo-grc:/sys/devices/platform/musb_hdrc# echo host > mode
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = cfbe4000
[00000000] *pgd=8fbaf031, *pte=00000000, *ppte=00000000
Internal error: Oops: 0 [#1] PREEMPT
Modules linked in: ftdi_sio usbserial ipv6
CPU: 0    Not tainted  (2.6.29-rt1-omap1-g8dde6bd-dirty #1)
PC is at 0x0
LR is at musb_platform_set_mode+0x50/0x70
pc : [<00000000>]    lr : [<c0243064>]    psr: 60000013
sp : cf0e3ed8  ip : cf83b0d0  fp : cf0e3ee4
r10: cf0e3f70  r9 : cfbf9238  r8 : c03ff1e8
r7 : c03e15ac  r6 : 00000005  r5 : cf83b0d0  r4 : cfaa7000
r3 : 00000081  r2 : d80ab000  r1 : cf83b000  r0 : cf83b1c4
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 10c5387d  Table: 8fbe4019  DAC: 00000015
Process sh (pid: 1233, stack limit = 0xcf0e22e8)
Stack: (0xcf0e3ed8 to 0xcf0e4000)
3ec0:                                                       cf0e3f04 cf0e3ee8
3ee0: c0241ce0 c0243020 cf07bc00 00000005 cf92ef08 cfbf9220 cf0e3f14 cf0e3f08
3f00: c01e9dfc c0241c68 cf0e3f44 cf0e3f18 c00ef7bc c01e9de4 00000000 cf07bc00
3f20: 4001e000 cf0e3f70 00000005 00000005 cf0e2000 00000001 cf0e3f6c cf0e3f48
3f40: c00aca90 c00ef6b8 cf07bc00 00000000 00000000 00000000 cf07bc00 4001e000
3f60: cf0e3fa4 cf0e3f70 c00acbe4 c00ac9e8 00000000 00000000 cf0e3fa4 00000000
3f80: c00b8fe8 00000005 4001e000 401ac600 00000004 c002d0c4 00000000 cf0e3fa8
3fa0: c002cf40 c00acbac 00000005 4001e000 00000001 4001e000 00000005 00000000
3fc0: 00000005 4001e000 401ac600 00000004 00000005 000a93f0 00000001 000a9008
3fe0: 00000000 bea345e8 400f578c 4014299c 60000010 00000001 00000000 00000000
Backtrace:
[<c0243014>] (musb_platform_set_mode+0x0/0x70) from [<c0241ce0>]
(musb_mode_store+0x84/0xac)
[<c0241c5c>] (musb_mode_store+0x0/0xac) from [<c01e9dfc>]
(dev_attr_store+0x24/0x28)
 r6:cfbf9220 r5:cf92ef08 r4:00000005
[<c01e9dd8>] (dev_attr_store+0x0/0x28) from [<c00ef7bc>]
(sysfs_write_file+0x110/0x144)
[<c00ef6ac>] (sysfs_write_file+0x0/0x144) from [<c00aca90>]
(vfs_write+0xb4/0x144)
[<c00ac9dc>] (vfs_write+0x0/0x144) from [<c00acbe4>] (sys_write+0x44/0x70)
 r7:4001e000 r6:cf07bc00 r5:00000000 r4:00000000
[<c00acba0>] (sys_write+0x0/0x70) from [<c002cf40>] (ret_fast_syscall+0x0/0x2c)
 r8:c002d0c4 r7:00000004 r6:401ac600 r5:4001e000 r4:00000005
Code: bad PC value.
---[ end trace d7d34d233af69b05 ]---


I'm building git 90e758af52ba803cba233fabee81176d99589f09 (2.6.29
final) using openembedded linux-omap recipe. My config is attached. I
have applied the -rt3 (or -rt2 or -rt1 - same errors) patch from
http://www.kernel.org/pub/linux/kernel/projects/rt/. I can't get the
2.6.29.1-rtX patch to apply cleanly because I can't figure out which
git revision corresponds to 2.6.29.1....



There is one other oops I see during 8250/16550 serial port
initialization with -rt, but that was easily fixed (see attached
patch). As I said, I'm new to RT so I've got no idea if the way I did
it in the patch is valid, but it seems to work, and seeing as it's
only during initialization, it seems fairly safe.

Serial: 8250/16550 driver, 8 ports, IRQ sharing enabled
irq 72: nobody cared (try booting with the "irqpoll" option)
[<c02f6634>] (dump_stack+0x0/0x14) from [<c007e1d4>]
(__report_bad_irq+0x3c/0x98)
[<c007e198>] (__report_bad_irq+0x0/0x98) from [<c007e380>]
(note_interrupt+0x150/0x1d8)
 r4:c03eb2ec
[<c007e230>] (note_interrupt+0x0/0x1d8) from [<c007d370>]
(thread_simple_irq+0xa0/0xc0)
[<c007d2d0>] (thread_simple_irq+0x0/0xc0) from [<c007d45c>] (do_irqd+0xcc/0x334)
[<c007d390>] (do_irqd+0x0/0x334) from [<c0065b54>] (kthread+0x5c/0x94)
[<c0065af8>] (kthread+0x0/0x94) from [<c0053b28>] (do_exit+0x0/0x73c)
 r6:00000000 r5:00000000 r4:00000000
handlers:
[<c0036164>] (omap_uart_interrupt+0x0/0x1c)
Disabling IRQ #72
serial8250.0: ttyS0 at MMIO 0x4806a000 (irq = 72) is a ST16654
irq 73: nobody cared (try booting with the "irqpoll" option)
[<c02f6634>] (dump_stack+0x0/0x14) from [<c007e1d4>]
(__report_bad_irq+0x3c/0x98)
[<c007e198>] (__report_bad_irq+0x0/0x98) from [<c007e380>]
(note_interrupt+0x150/0x1d8)
 r4:c03eb358
[<c007e230>] (note_interrupt+0x0/0x1d8) from [<c007d370>]
(thread_simple_irq+0xa0/0xc0)
[<c007d2d0>] (thread_simple_irq+0x0/0xc0) from [<c007d45c>] (do_irqd+0xcc/0x334)
[<c007d390>] (do_irqd+0x0/0x334) from [<c0065b54>] (kthread+0x5c/0x94)
[<c0065af8>] (kthread+0x0/0x94) from [<c0053b28>] (do_exit+0x0/0x73c)
 r6:00000000 r5:00000000 r4:00000000
handlers:
[<c0036164>] (omap_uart_interrupt+0x0/0x1c)
Disabling IRQ #73
serial8250.0: ttyS1 at MMIO 0x4806c000 (irq = 73) is a ST16654
serial8250.0: ttyS2 at MMIO 0x49020000 (irq = 74) is a ST16654
console [ttyS2] enabled


Thanks in advance,
Hugo Vincent


On Mon, Apr 6, 2009 at 10:25 PM, David Brownell <david-b@pacbell.net> wrote:
> On Sunday 05 April 2009, Hugo Vincent wrote:
>> I'm trying to get the realtime patch set to work on OMAP3 (Gumstix
>> Overo). Linux-omap 2.6.29 with the RT patches -rt1 or -rt2 work mostly
>> as is (MUSB and the usb-gadget layer have quite a few problems, and
>
> Like what?  Way back in 2.6.10 MUSB behaved relatively sanely.
> But that's a while back.  ;)
>
>
>> the realtime self-test stuff picks up a few problems to do with
>> spinlock usage etc, but most things seem to mostly work correctly for
>> my needs). Running cyclictest with various types of loads gives an
>> average latency of ~30-50 usec and worst case up around 300 usec.
>
>
>

[-- Attachment #2: defconfig --]
[-- Type: application/octet-stream, Size: 40382 bytes --]

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.29-rt4-omap1
# Mon Apr  6 15:16:19 2009
#
CONFIG_ARM=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
CONFIG_GENERIC_GPIO=y
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_MMU=y
# CONFIG_NO_IOPORT is not set
CONFIG_GENERIC_HARDIRQS=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
CONFIG_VECTORS_BASE=0xffff0000
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
# CONFIG_POSIX_MQUEUE is not set
CONFIG_BSD_PROCESS_ACCT=y
# CONFIG_BSD_PROCESS_ACCT_V3 is not set
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set

#
# RCU Subsystem
#
# CONFIG_CLASSIC_RCU is not set
# CONFIG_TREE_RCU is not set
CONFIG_PREEMPT_RCU=y
# CONFIG_RCU_TRACE is not set
# CONFIG_TREE_RCU_TRACE is not set
# CONFIG_PREEMPT_RCU_TRACE is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_GROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_USER_SCHED=y
# CONFIG_CGROUP_SCHED is not set
# CONFIG_CGROUPS is not set
# CONFIG_SYSFS_DEPRECATED_V2 is not set
# CONFIG_RELAY is not set
# CONFIG_NAMESPACES is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_RD_GZIP=y
# CONFIG_RD_BZIP2 is not set
# CONFIG_RD_LZMA is not set
CONFIG_INITRAMFS_COMPRESSION_NONE=y
# CONFIG_INITRAMFS_COMPRESSION_GZIP is not set
# CONFIG_INITRAMFS_COMPRESSION_BZIP2 is not set
# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
CONFIG_EMBEDDED=y
CONFIG_UID16=y
# CONFIG_SYSCTL_SYSCALL is not set
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
# CONFIG_ELF_CORE is not set
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y

#
# Performance Counters
#
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_COMPAT_BRK=y
CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set
# CONFIG_PROFILING is not set
# CONFIG_MARKERS is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_CLK=y
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SRCVERSION_ALL=y
CONFIG_BLOCK=y
# CONFIG_LBD is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_BLK_DEV_INTEGRITY is not set

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
CONFIG_DEFAULT_AS=y
# CONFIG_DEFAULT_DEADLINE is not set
# CONFIG_DEFAULT_CFQ is not set
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="anticipatory"
CONFIG_FREEZER=y

#
# System Type
#
# CONFIG_ARCH_AAEC2000 is not set
# CONFIG_ARCH_INTEGRATOR is not set
# CONFIG_ARCH_REALVIEW is not set
# CONFIG_ARCH_VERSATILE is not set
# CONFIG_ARCH_AT91 is not set
# CONFIG_ARCH_CLPS711X is not set
# CONFIG_ARCH_EBSA110 is not set
# CONFIG_ARCH_EP93XX is not set
# CONFIG_ARCH_FOOTBRIDGE is not set
# CONFIG_ARCH_NETX is not set
# CONFIG_ARCH_H720X is not set
# CONFIG_ARCH_IMX is not set
# CONFIG_ARCH_IOP13XX is not set
# CONFIG_ARCH_IOP32X is not set
# CONFIG_ARCH_IOP33X is not set
# CONFIG_ARCH_IXP23XX is not set
# CONFIG_ARCH_IXP2000 is not set
# CONFIG_ARCH_IXP4XX is not set
# CONFIG_ARCH_L7200 is not set
# CONFIG_ARCH_KIRKWOOD is not set
# CONFIG_ARCH_KS8695 is not set
# CONFIG_ARCH_NS9XXX is not set
# CONFIG_ARCH_LOKI is not set
# CONFIG_ARCH_MV78XX0 is not set
# CONFIG_ARCH_MXC is not set
# CONFIG_ARCH_ORION5X is not set
# CONFIG_ARCH_PNX4008 is not set
# CONFIG_ARCH_PXA is not set
# CONFIG_ARCH_RPC is not set
# CONFIG_ARCH_SA1100 is not set
# CONFIG_ARCH_S3C2410 is not set
# CONFIG_ARCH_S3C64XX is not set
# CONFIG_ARCH_SHARK is not set
# CONFIG_ARCH_LH7A40X is not set
# CONFIG_ARCH_DAVINCI is not set
CONFIG_ARCH_OMAP=y
# CONFIG_ARCH_MSM is not set
# CONFIG_ARCH_W90X900 is not set

#
# TI OMAP Implementations
#
CONFIG_ARCH_OMAP_OTG=y
# CONFIG_ARCH_OMAP1 is not set
# CONFIG_ARCH_OMAP2 is not set
CONFIG_ARCH_OMAP3=y

#
# OMAP Feature Selections
#
# CONFIG_OMAP_DEBUG_POWERDOMAIN is not set
# CONFIG_OMAP_DEBUG_CLOCKDOMAIN is not set
CONFIG_OMAP_SMARTREFLEX=y
# CONFIG_OMAP_SMARTREFLEX_TESTING is not set
CONFIG_OMAP_RESET_CLOCKS=y
# CONFIG_OMAP_BOOT_TAG is not set
# CONFIG_OMAP_GPIO_SWITCH is not set
CONFIG_OMAP_MUX=y
CONFIG_OMAP_MUX_DEBUG=y
CONFIG_OMAP_MUX_WARNINGS=y
CONFIG_OMAP_MCBSP=y
# CONFIG_OMAP_MBOX_FWK is not set
CONFIG_OMAP_MPU_TIMER=y
# CONFIG_OMAP_32K_TIMER is not set
CONFIG_OMAP_TICK_GPTIMER=1
CONFIG_OMAP_DM_TIMER=y
# CONFIG_OMAP_LL_DEBUG_UART1 is not set
# CONFIG_OMAP_LL_DEBUG_UART2 is not set
CONFIG_OMAP_LL_DEBUG_UART3=y
CONFIG_OMAP_SERIAL_WAKE=y
CONFIG_ARCH_OMAP34XX=y
CONFIG_ARCH_OMAP3430=y

#
# OMAP Board Type
#
# CONFIG_MACH_NOKIA_RX51 is not set
# CONFIG_MACH_OMAP_LDP is not set
# CONFIG_MACH_OMAP_3430SDP is not set
# CONFIG_MACH_OMAP3EVM is not set
# CONFIG_MACH_OMAP3_BEAGLE is not set
CONFIG_MACH_OVERO=y
# CONFIG_MACH_OMAP3_PANDORA is not set

#
# Processor Type
#
CONFIG_CPU_32=y
CONFIG_CPU_32v6K=y
CONFIG_CPU_V7=y
CONFIG_CPU_32v7=y
CONFIG_CPU_ABRT_EV7=y
CONFIG_CPU_PABRT_IFAR=y
CONFIG_CPU_CACHE_V7=y
CONFIG_CPU_CACHE_VIPT=y
CONFIG_CPU_COPY_V6=y
CONFIG_CPU_TLB_V7=y
CONFIG_CPU_HAS_ASID=y
CONFIG_CPU_CP15=y
CONFIG_CPU_CP15_MMU=y

#
# Processor Features
#
CONFIG_ARM_THUMB=y
CONFIG_ARM_THUMBEE=y
# CONFIG_CPU_ICACHE_DISABLE is not set
# CONFIG_CPU_DCACHE_DISABLE is not set
# CONFIG_CPU_BPREDICT_DISABLE is not set
CONFIG_HAS_TLS_REG=y
# CONFIG_OUTER_CACHE is not set

#
# Bus support
#
# CONFIG_PCI_SYSCALL is not set
# CONFIG_ARCH_SUPPORTS_MSI is not set
# CONFIG_PCCARD is not set

#
# Kernel Features
#
CONFIG_TICK_ONESHOT=y
# CONFIG_NO_HZ is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_VMSPLIT_3G=y
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_1G is not set
CONFIG_PAGE_OFFSET=0xC0000000
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT_DESKTOP is not set
CONFIG_PREEMPT_RT=y
CONFIG_PREEMPT=y
CONFIG_PREEMPT_SOFTIRQS=y
CONFIG_PREEMPT_HARDIRQS=y
CONFIG_HZ=1000
CONFIG_AEABI=y
# CONFIG_OABI_COMPAT is not set
CONFIG_ARCH_FLATMEM_HAS_HOLES=y
# CONFIG_ARCH_SPARSEMEM_DEFAULT is not set
# CONFIG_ARCH_SELECT_MEMORY_MODEL is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_PHYS_ADDR_T_64BIT is not set
CONFIG_ZONE_DMA_FLAG=0
CONFIG_VIRT_TO_BUS=y
CONFIG_UNEVICTABLE_LRU=y
CONFIG_LEDS=y
CONFIG_ALIGNMENT_TRAP=y

#
# Boot options
#
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
CONFIG_CMDLINE=" debug "
# CONFIG_XIP_KERNEL is not set
CONFIG_KEXEC=y
CONFIG_ATAGS_PROC=y

#
# CPU Power Management
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_DEBUG is not set
CONFIG_CPU_FREQ_STAT=y
CONFIG_CPU_FREQ_STAT_DETAILS=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y

#
# Floating point emulation
#

#
# At least one emulation must be selected
#
CONFIG_VFP=y
CONFIG_VFPv3=y
CONFIG_NEON=y

#
# Userspace binary formats
#
CONFIG_BINFMT_ELF=y
CONFIG_HAVE_AOUT=y
CONFIG_BINFMT_AOUT=m
CONFIG_BINFMT_MISC=m

#
# Power management options
#
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
CONFIG_PM_SLEEP=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
# CONFIG_APM_EMULATION is not set
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_NET=y

#
# Networking options
#
CONFIG_COMPAT_NET_DEV_OPS=y
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
CONFIG_INET_TUNNEL=m
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
# CONFIG_INET_LRO is not set
# CONFIG_INET_DIAG is not set
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=m
# CONFIG_IPV6_PRIVACY is not set
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
CONFIG_INET6_XFRM_MODE_TRANSPORT=m
CONFIG_INET6_XFRM_MODE_TUNNEL=m
CONFIG_INET6_XFRM_MODE_BEET=m
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
CONFIG_IPV6_SIT=m
CONFIG_IPV6_NDISC_NODETYPE=y
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_IPV6_MROUTE is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
CONFIG_IP_SCTP=m
# CONFIG_SCTP_DBG_MSG is not set
# CONFIG_SCTP_DBG_OBJCNT is not set
# CONFIG_SCTP_HMAC_NONE is not set
# CONFIG_SCTP_HMAC_SHA1 is not set
CONFIG_SCTP_HMAC_MD5=y
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DSA is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_PHONET is not set
# CONFIG_WIRELESS is not set
CONFIG_WIRELESS_EXT=y
CONFIG_LIB80211=m
CONFIG_LIB80211_CRYPT_WEP=m
CONFIG_LIB80211_CRYPT_CCMP=m
CONFIG_LIB80211_CRYPT_TKIP=m
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_SYS_HYPERVISOR is not set
# CONFIG_CONNECTOR is not set
CONFIG_MTD=y
# CONFIG_MTD_DEBUG is not set
CONFIG_MTD_CONCAT=y
CONFIG_MTD_PARTITIONS=y
CONFIG_MTD_TESTS=m
# CONFIG_MTD_REDBOOT_PARTS is not set
# CONFIG_MTD_CMDLINE_PARTS is not set
# CONFIG_MTD_AFS_PARTS is not set
# CONFIG_MTD_AR7_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set
# CONFIG_MTD_OOPS is not set

#
# RAM/ROM/Flash chip drivers
#
# CONFIG_MTD_CFI is not set
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_MAP_BANK_WIDTH_1=y
CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
CONFIG_MTD_CFI_I1=y
CONFIG_MTD_CFI_I2=y
# CONFIG_MTD_CFI_I4 is not set
# CONFIG_MTD_CFI_I8 is not set
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
# CONFIG_MTD_PLATRAM is not set

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_DATAFLASH is not set
# CONFIG_MTD_M25P80 is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLOCK2MTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOC2000 is not set
# CONFIG_MTD_DOC2001 is not set
# CONFIG_MTD_DOC2001PLUS is not set
CONFIG_MTD_NAND=y
# CONFIG_MTD_NAND_VERIFY_WRITE is not set
# CONFIG_MTD_NAND_ECC_SMC is not set
# CONFIG_MTD_NAND_MUSEUM_IDS is not set
# CONFIG_MTD_NAND_GPIO is not set
CONFIG_MTD_NAND_OMAP2=y
CONFIG_MTD_NAND_IDS=y
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_NANDSIM is not set
# CONFIG_MTD_NAND_PLATFORM is not set
# CONFIG_MTD_ALAUDA is not set
# CONFIG_MTD_ONENAND is not set

#
# LPDDR flash memory drivers
#
# CONFIG_MTD_LPDDR is not set

#
# UBI - Unsorted block images
#
CONFIG_MTD_UBI=y
CONFIG_MTD_UBI_WL_THRESHOLD=1024
CONFIG_MTD_UBI_BEB_RESERVE=5
CONFIG_MTD_UBI_GLUEBI=y

#
# UBI debugging options
#
# CONFIG_MTD_UBI_DEBUG is not set
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_UB is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=16384
# CONFIG_BLK_DEV_XIP is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_MISC_DEVICES is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_RAID_ATTRS=m
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
CONFIG_CHR_DEV_SG=m
# CONFIG_CHR_DEV_SCH is not set

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
CONFIG_SCSI_MULTI_LUN=y
# CONFIG_SCSI_CONSTANTS is not set
# CONFIG_SCSI_LOGGING is not set
# CONFIG_SCSI_SCAN_ASYNC is not set
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
CONFIG_SCSI_LOWLEVEL=y
# CONFIG_ISCSI_TCP is not set
# CONFIG_LIBFC is not set
# CONFIG_SCSI_DEBUG is not set
# CONFIG_SCSI_DH is not set
# CONFIG_ATA is not set
# CONFIG_MD is not set
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
# CONFIG_BONDING is not set
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
CONFIG_TUN=m
# CONFIG_VETH is not set
# CONFIG_NET_ETHERNET is not set
CONFIG_MII=y
# CONFIG_NETDEV_1000 is not set
# CONFIG_NETDEV_10000 is not set

#
# Wireless LAN
#
# CONFIG_WLAN_PRE80211 is not set
CONFIG_WLAN_80211=y
CONFIG_LIBERTAS=m
CONFIG_LIBERTAS_USB=m
CONFIG_LIBERTAS_SDIO=m
CONFIG_LIBERTAS_DEBUG=y
CONFIG_USB_ZD1201=m
CONFIG_USB_NET_RNDIS_WLAN=m
# CONFIG_IWLWIFI_LEDS is not set
CONFIG_HOSTAP=m
CONFIG_HOSTAP_FIRMWARE=y
CONFIG_HOSTAP_FIRMWARE_NVRAM=y

#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#

#
# USB Network Adapters
#
CONFIG_USB_CATC=m
CONFIG_USB_KAWETH=m
CONFIG_USB_PEGASUS=m
CONFIG_USB_RTL8150=m
CONFIG_USB_USBNET=y
CONFIG_USB_NET_AX8817X=y
CONFIG_USB_NET_CDCETHER=y
CONFIG_USB_NET_DM9601=m
# CONFIG_USB_NET_SMSC95XX is not set
CONFIG_USB_NET_GL620A=m
CONFIG_USB_NET_NET1080=m
CONFIG_USB_NET_PLUSB=m
CONFIG_USB_NET_MCS7830=m
CONFIG_USB_NET_RNDIS_HOST=m
CONFIG_USB_NET_CDC_SUBSET=m
CONFIG_USB_ALI_M5632=y
CONFIG_USB_AN2720=y
CONFIG_USB_BELKIN=y
CONFIG_USB_ARMLINUX=y
CONFIG_USB_EPSON2888=y
CONFIG_USB_KC2190=y
CONFIG_USB_NET_ZAURUS=m
# CONFIG_WAN is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
# CONFIG_ISDN is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_POLLDEV is not set

#
# Userland interfaces
#
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_JOYDEV is not set
CONFIG_INPUT_EVDEV=m
CONFIG_INPUT_EVBUG=m

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ATKBD is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_TWL4030 is not set
# CONFIG_KEYBOARD_LM8323 is not set
CONFIG_KEYBOARD_GPIO=m
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_LIBPS2 is not set
# CONFIG_SERIO_RAW is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_DEVKMEM=y
# CONFIG_SERIAL_NONSTANDARD is not set

#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_NR_UARTS=32
CONFIG_SERIAL_8250_RUNTIME_UARTS=8
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
CONFIG_SERIAL_8250_RSA=y

#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_HELPER_AUTO=y

#
# I2C Hardware Bus support
#

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_GPIO is not set
# CONFIG_I2C_OCORES is not set
CONFIG_I2C_OMAP=y
# CONFIG_I2C_SIMTEC is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_STUB is not set

#
# Miscellaneous I2C Chip support
#
# CONFIG_DS1682 is not set
# CONFIG_SENSORS_PCF8591 is not set
CONFIG_TWL4030_MADC=m
CONFIG_TWL4030_POWEROFF=y
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_SENSORS_TSL2563 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP is not set
CONFIG_SPI=y
CONFIG_SPI_MASTER=y

#
# SPI Master Controller Drivers
#
# CONFIG_SPI_BITBANG is not set
# CONFIG_SPI_GPIO is not set
CONFIG_SPI_OMAP24XX=y

#
# SPI Protocol Masters
#
# CONFIG_SPI_TSC210X is not set
# CONFIG_SPI_TSC2301 is not set
# CONFIG_SPI_SPIDEV is not set
# CONFIG_SPI_TLE62X0 is not set
CONFIG_ARCH_REQUIRE_GPIOLIB=y
CONFIG_GPIOLIB=y
CONFIG_GPIO_SYSFS=y

#
# Memory mapped GPIO expanders:
#

#
# I2C GPIO expanders:
#
# CONFIG_GPIO_MAX732X is not set
CONFIG_GPIO_PCA953X=m
CONFIG_GPIO_PCF857X=m
CONFIG_GPIO_TWL4030=y

#
# PCI GPIO expanders:
#

#
# SPI GPIO expanders:
#
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MCP23S08 is not set
CONFIG_W1=m

#
# 1-wire Bus Masters
#
# CONFIG_W1_MASTER_DS2490 is not set
# CONFIG_W1_MASTER_DS2482 is not set
# CONFIG_W1_MASTER_DS1WM is not set
# CONFIG_W1_MASTER_GPIO is not set
CONFIG_HDQ_MASTER_OMAP=m

#
# 1-wire Slaves
#
# CONFIG_W1_SLAVE_THERM is not set
CONFIG_W1_SLAVE_SMEM=m
# CONFIG_W1_SLAVE_DS2431 is not set
# CONFIG_W1_SLAVE_DS2433 is not set
# CONFIG_W1_SLAVE_DS2760 is not set
# CONFIG_W1_SLAVE_BQ27000 is not set
# CONFIG_POWER_SUPPLY is not set
CONFIG_HWMON=y
# CONFIG_HWMON_VID is not set
# CONFIG_SENSORS_AD7414 is not set
# CONFIG_SENSORS_AD7418 is not set
# CONFIG_SENSORS_ADCXX is not set
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
# CONFIG_SENSORS_ADM1029 is not set
# CONFIG_SENSORS_ADM1031 is not set
# CONFIG_SENSORS_ADM9240 is not set
# CONFIG_SENSORS_ADT7462 is not set
# CONFIG_SENSORS_ADT7470 is not set
# CONFIG_SENSORS_ADT7473 is not set
# CONFIG_SENSORS_ADT7475 is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_F71805F is not set
# CONFIG_SENSORS_F71882FG is not set
# CONFIG_SENSORS_F75375S is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_IT87 is not set
# CONFIG_SENSORS_LM63 is not set
# CONFIG_SENSORS_LM70 is not set
# CONFIG_SENSORS_LM75 is not set
# CONFIG_SENSORS_LM77 is not set
# CONFIG_SENSORS_LM78 is not set
# CONFIG_SENSORS_LM80 is not set
# CONFIG_SENSORS_LM83 is not set
# CONFIG_SENSORS_LM85 is not set
# CONFIG_SENSORS_LM87 is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
# CONFIG_SENSORS_LTC4245 is not set
# CONFIG_SENSORS_MAX1111 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
# CONFIG_SENSORS_DME1737 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_SENSORS_SMSC47M192 is not set
# CONFIG_SENSORS_SMSC47B397 is not set
# CONFIG_SENSORS_ADS7828 is not set
# CONFIG_SENSORS_THMC50 is not set
# CONFIG_SENSORS_VT1211 is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
# CONFIG_SENSORS_W83792D is not set
# CONFIG_SENSORS_W83793 is not set
# CONFIG_SENSORS_W83L785TS is not set
# CONFIG_SENSORS_W83L786NG is not set
# CONFIG_SENSORS_W83627HF is not set
# CONFIG_SENSORS_W83627EHF is not set
# CONFIG_SENSORS_TSC210X is not set
CONFIG_SENSORS_OMAP34XX=y
# CONFIG_HWMON_DEBUG_CHIP is not set
# CONFIG_THERMAL is not set
CONFIG_THERMAL_HWMON=y
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_NOWAYOUT=y

#
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
CONFIG_OMAP_WATCHDOG=y

#
# USB-based Watchdog Cards
#
# CONFIG_USBPCWATCHDOG is not set
CONFIG_SSB_POSSIBLE=y

#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_ASIC3 is not set
# CONFIG_HTC_EGPIO is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_TPS65010 is not set
CONFIG_TWL4030_CORE=y
# CONFIG_TWL4030_POWER is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_MFD_T7L66XB is not set
# CONFIG_MFD_TC6387XB is not set
# CONFIG_MFD_TC6393XB is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_PCF50633 is not set

#
# Multimedia devices
#

#
# Multimedia core support
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
# CONFIG_VIDEO_MEDIA is not set

#
# Multimedia drivers
#
# CONFIG_DAB is not set

#
# Graphics support
#
# CONFIG_VGASTATE is not set
# CONFIG_VIDEO_OUTPUT_CONTROL is not set
# CONFIG_FB is not set
# CONFIG_OMAP2_DSS is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set

#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set

#
# Console display driver support
#
# CONFIG_VGA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
# CONFIG_SOUND is not set
# CONFIG_HID_SUPPORT is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
# CONFIG_USB_DEVICE_CLASS is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_SUSPEND is not set
# CONFIG_USB_OTG is not set
# CONFIG_USB_OTG_WHITELIST is not set
# CONFIG_USB_OTG_BLACKLIST_HUB is not set
# CONFIG_USB_MON is not set
# CONFIG_USB_WUSB is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_OMAP_EHCI_PHY_MODE=y
# CONFIG_OMAP_EHCI_TLL_MODE is not set
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_OHCI_HCD is not set
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HWA_HCD is not set
CONFIG_USB_MUSB_HDRC=y
CONFIG_USB_MUSB_SOC=y

#
# OMAP 343x high speed USB support
#
# CONFIG_USB_MUSB_HOST is not set
CONFIG_USB_MUSB_PERIPHERAL=y
# CONFIG_USB_MUSB_OTG is not set
CONFIG_USB_GADGET_MUSB_HDRC=y
CONFIG_MUSB_PIO_ONLY=y
CONFIG_USB_MUSB_DEBUG=y

#
# USB Device Class drivers
#
CONFIG_USB_ACM=m
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may also be needed;
#

#
# see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=m
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_LIBUSUAL is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB port drivers
#
CONFIG_USB_SERIAL=m
CONFIG_USB_EZUSB=y
CONFIG_USB_SERIAL_GENERIC=y
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_CH341 is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_CP2101 is not set
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
CONFIG_USB_SERIAL_FTDI_SIO=m
# CONFIG_USB_SERIAL_FUNSOFT is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IPAQ is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
# CONFIG_USB_SERIAL_IUU is not set
CONFIG_USB_SERIAL_KEYSPAN_PDA=m
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
# CONFIG_USB_SERIAL_KOBIL_SCT is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_MOS7720 is not set
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_MOTOROLA is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
CONFIG_USB_SERIAL_PL2303=m
# CONFIG_USB_SERIAL_OTI6858 is not set
# CONFIG_USB_SERIAL_SPCP8X5 is not set
# CONFIG_USB_SERIAL_HP4X is not set
# CONFIG_USB_SERIAL_SAFE is not set
# CONFIG_USB_SERIAL_SIEMENS_MPI is not set
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
# CONFIG_USB_SERIAL_TI is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_XIRCOM is not set
CONFIG_USB_SERIAL_OPTION=m
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_SERIAL_OPTICON is not set
# CONFIG_USB_SERIAL_DEBUG is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_BERRY_CHARGE is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_PHIDGET is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_VST is not set
CONFIG_USB_GADGET=y
# CONFIG_USB_GADGET_DEBUG_FILES is not set
CONFIG_USB_GADGET_VBUS_DRAW=2
CONFIG_USB_GADGET_SELECTED=y
# CONFIG_USB_GADGET_AT91 is not set
# CONFIG_USB_GADGET_ATMEL_USBA is not set
# CONFIG_USB_GADGET_FSL_USB2 is not set
# CONFIG_USB_GADGET_LH7A40X is not set
# CONFIG_USB_GADGET_OMAP is not set
# CONFIG_USB_GADGET_PXA25X is not set
# CONFIG_USB_GADGET_PXA27X is not set
# CONFIG_USB_GADGET_S3C2410 is not set
# CONFIG_USB_GADGET_IMX is not set
# CONFIG_USB_GADGET_M66592 is not set
# CONFIG_USB_GADGET_AMD5536UDC is not set
# CONFIG_USB_GADGET_FSL_QE is not set
# CONFIG_USB_GADGET_CI13XXX is not set
# CONFIG_USB_GADGET_NET2280 is not set
# CONFIG_USB_GADGET_GOKU is not set
# CONFIG_USB_GADGET_DUMMY_HCD is not set
CONFIG_USB_GADGET_DUALSPEED=y
# CONFIG_USB_ZERO is not set
CONFIG_USB_ETH=m
CONFIG_USB_ETH_RNDIS=y
# CONFIG_USB_GADGETFS is not set
# CONFIG_USB_FILE_STORAGE is not set
CONFIG_USB_G_SERIAL=m
# CONFIG_USB_MIDI_GADGET is not set
# CONFIG_USB_G_PRINTER is not set
CONFIG_USB_CDC_COMPOSITE=m

#
# OTG and related infrastructure
#
CONFIG_USB_OTG_UTILS=y
# CONFIG_USB_GPIO_VBUS is not set
# CONFIG_ISP1301_OMAP is not set
CONFIG_TWL4030_USB=y
CONFIG_MMC=y
# CONFIG_MMC_DEBUG is not set
# CONFIG_MMC_UNSAFE_RESUME is not set

#
# MMC/SD/SDIO Card Drivers
#
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
CONFIG_SDIO_UART=y
# CONFIG_MMC_TEST is not set

#
# MMC/SD/SDIO Host Controller Drivers
#
# CONFIG_MMC_SDHCI is not set
CONFIG_MMC_OMAP_HS=y
# CONFIG_MMC_SPI is not set
# CONFIG_MEMSTICK is not set
# CONFIG_ACCESSIBILITY is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#
# CONFIG_LEDS_OMAP_DEBUG is not set
# CONFIG_LEDS_OMAP is not set
# CONFIG_LEDS_OMAP_PWM is not set
# CONFIG_LEDS_PCA9532 is not set
CONFIG_LEDS_GPIO=y
# CONFIG_LEDS_LP5521 is not set
# CONFIG_LEDS_PCA955X is not set

#
# LED Triggers
#
CONFIG_LEDS_TRIGGERS=y
CONFIG_LEDS_TRIGGER_TIMER=y
CONFIG_LEDS_TRIGGER_HEARTBEAT=y
# CONFIG_LEDS_TRIGGER_BACKLIGHT is not set
# CONFIG_LEDS_TRIGGER_DEFAULT_ON is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
CONFIG_RTC_DRV_TWL4030=y
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8581 is not set

#
# SPI RTC drivers
#
# CONFIG_RTC_DRV_M41T94 is not set
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_DS1390 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
# CONFIG_RTC_DRV_R9701 is not set
# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_DS3234 is not set

#
# Platform RTC drivers
#
# CONFIG_RTC_DRV_CMOS is not set
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
# CONFIG_DMADEVICES is not set
CONFIG_REGULATOR=y
# CONFIG_REGULATOR_DEBUG is not set
# CONFIG_REGULATOR_FIXED_VOLTAGE is not set
# CONFIG_REGULATOR_VIRTUAL_CONSUMER is not set
# CONFIG_REGULATOR_BQ24022 is not set
CONFIG_REGULATOR_TWL4030=y
# CONFIG_UIO is not set
# CONFIG_STAGING is not set

#
# CBUS support
#
# CONFIG_CBUS is not set

#
# File systems
#
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
# CONFIG_EXT3_FS_XATTR is not set
# CONFIG_EXT4_FS is not set
CONFIG_JBD=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
CONFIG_FS_POSIX_ACL=y
CONFIG_FILE_LOCKING=y
# CONFIG_XFS_FS is not set
# CONFIG_OCFS2_FS is not set
# CONFIG_BTRFS_FS is not set
CONFIG_DNOTIFY=y
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
CONFIG_FUSE_FS=m

#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_HUGETLB_PAGE is not set
CONFIG_CONFIGFS_FS=m
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
CONFIG_JFFS2_FS=y
CONFIG_JFFS2_FS_DEBUG=0
CONFIG_JFFS2_FS_WRITEBUFFER=y
# CONFIG_JFFS2_FS_WBUF_VERIFY is not set
CONFIG_JFFS2_SUMMARY=y
CONFIG_JFFS2_FS_XATTR=y
CONFIG_JFFS2_FS_POSIX_ACL=y
CONFIG_JFFS2_FS_SECURITY=y
CONFIG_JFFS2_COMPRESSION_OPTIONS=y
CONFIG_JFFS2_ZLIB=y
CONFIG_JFFS2_LZO=y
CONFIG_JFFS2_RTIME=y
CONFIG_JFFS2_RUBIN=y
# CONFIG_JFFS2_CMODE_NONE is not set
CONFIG_JFFS2_CMODE_PRIORITY=y
# CONFIG_JFFS2_CMODE_SIZE is not set
# CONFIG_JFFS2_CMODE_FAVOURLZO is not set
CONFIG_UBIFS_FS=y
# CONFIG_UBIFS_FS_XATTR is not set
CONFIG_UBIFS_FS_ADVANCED_COMPR=y
CONFIG_UBIFS_FS_LZO=y
# CONFIG_UBIFS_FS_ZLIB is not set
# CONFIG_UBIFS_FS_DEBUG is not set
# CONFIG_CRAMFS is not set
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
# CONFIG_NFS_V3_ACL is not set
CONFIG_NFS_V4=y
# CONFIG_NFSD is not set
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
# CONFIG_SUNRPC_REGISTER_V4 is not set
CONFIG_RPCSEC_GSS_KRB5=y
# CONFIG_RPCSEC_GSS_SPKM3 is not set
# CONFIG_SMB_FS is not set
# CONFIG_CIFS is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
# CONFIG_MAC_PARTITION is not set
CONFIG_MSDOS_PARTITION=y
# CONFIG_BSD_DISKLABEL is not set
# CONFIG_MINIX_SUBPARTITION is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
# CONFIG_KARMA_PARTITION is not set
# CONFIG_EFI_PARTITION is not set
# CONFIG_SYSV68_PARTITION is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_UTF8 is not set
CONFIG_DLM=m
# CONFIG_DLM_DEBUG is not set

#
# Kernel hacking
#
# CONFIG_PRINTK_TIME is not set
CONFIG_ALLOW_WARNINGS=y
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=1024
# CONFIG_MAGIC_SYSRQ is not set
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_SCHED_DEBUG=y
CONFIG_SCHEDSTATS=y
CONFIG_STACKTRACE=y
# CONFIG_DEBUG_BUGVERBOSE is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
CONFIG_FRAME_POINTER=y
CONFIG_LATENCYTOP=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_TRACING_SUPPORT=y

#
# Tracers
#
# CONFIG_FUNCTION_TRACER is not set
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_PREEMPT_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_CONTEXT_SWITCH_TRACER is not set
# CONFIG_EVENT_TRACER is not set
# CONFIG_BOOT_TRACER is not set
# CONFIG_TRACE_BRANCH_PROFILING is not set
# CONFIG_STACK_TRACER is not set
# CONFIG_KMEMTRACE is not set
# CONFIG_BLK_DEV_IO_TRACE is not set
CONFIG_DYNAMIC_PRINTK_DEBUG=y
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_DEBUG_USER is not set

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
# CONFIG_CRYPTO_FIPS is not set
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_GF128MUL=m
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_CRYPTD=m
# CONFIG_CRYPTO_AUTHENC is not set
CONFIG_CRYPTO_TEST=m

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
CONFIG_CRYPTO_ECB=y
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_PCBC=m
# CONFIG_CRYPTO_XTS is not set

#
# Hash modes
#
CONFIG_CRYPTO_HMAC=m
CONFIG_CRYPTO_XCBC=m

#
# Digest
#
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_MICHAEL_MIC=y
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
CONFIG_CRYPTO_SHA1=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
CONFIG_CRYPTO_TGR192=m
CONFIG_CRYPTO_WP512=m

#
# Ciphers
#
CONFIG_CRYPTO_AES=y
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_ARC4=y
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_DES=y
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_KHAZAD=m
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SEED is not set
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_TWOFISH_COMMON=m

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_LZO=y

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_HW is not set
# CONFIG_BINARY_PRINTF is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_LAST_BIT=y
CONFIG_CRC_CCITT=y
CONFIG_CRC16=y
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=y
CONFIG_CRC32=y
CONFIG_CRC7=y
CONFIG_LIBCRC32C=y
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_DECOMPRESS_GZIP=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y

[-- Attachment #3: serial_irq.patch --]
[-- Type: text/x-patch, Size: 1062 bytes --]

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 0d4f4c6..122b694 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -1073,6 +1073,7 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags)
 	unsigned char status1, scratch, scratch2, scratch3;
 	unsigned char save_lcr, save_mcr;
 	unsigned long flags;
+	DEFINE_RAW_SPINLOCK(raw_lock);
 
 	if (!up->port.iobase && !up->port.mapbase && !up->port.membase)
 		return;
@@ -1085,6 +1086,7 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags)
 	 * be frobbing the chips IRQ enable register to see if it exists.
 	 */
 	spin_lock_irqsave(&up->port.lock, flags);
+	spin_lock_irqsave(&raw_lock, flags);
 
 	up->capabilities = 0;
 	up->bugs = 0;
@@ -1240,6 +1242,7 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags)
 		serial_outp(up, UART_IER, 0);
 
  out:
+	spin_unlock_irqrestore(&raw_lock, flags);
 	spin_unlock_irqrestore(&up->port.lock, flags);
 	DEBUG_AUTOCONF("type=%s\n", uart_config[up->port.type].name);
 }

Re: Preempt-RT on OMAP3?

[David Brownell]

On Monday 06 April 2009, Hugo Vincent wrote:
> 
> Here are some of the crashes I've seen. Warning - I'm new to -rt and
> to the linux-omap tree, so I'll apologize in advance if these are just
> a result of me missing something obvious.

Thanks, I'll take a look.


> Context: using USB-gadget ethernet (g_ether) over musb (configured as
> just peripheral, not OTG). Most of the time it works, but after a
> while, or when it encounters a large packet (e.g fping -b30000) it
> crashes like so (apparently something to do with receive DMA usage).
> Although the fping -b case is kindof pathological, I've seen the same
> crash when ssh/scping files across to the board, so it does occur in
> real usage.

RX DMA is troublesome with the MUSB code, and there are some bugfixes
pending which should affect it.  (Posted to linux-usb over the last
week or two.)

Do these problems show up with DMA disabled?

- Dave
 

Re: Preempt-RT on OMAP3?

[Hugo Vincent]

On Tue, Apr 7, 2009 at 10:20 AM, David Brownell <david-b@pacbell.net> wrote:
> On Monday 06 April 2009, Hugo Vincent wrote:
>>
>> Here are some of the crashes I've seen. Warning - I'm new to -rt and
>> to the linux-omap tree, so I'll apologize in advance if these are just
>> a result of me missing something obvious.
>
> Thanks, I'll take a look.

Excellent, thank you!

>> Context: using USB-gadget ethernet (g_ether) over musb (configured as
>> just peripheral, not OTG). Most of the time it works, but after a
>> while, or when it encounters a large packet (e.g fping -b30000) it
>> crashes like so (apparently something to do with receive DMA usage).
>> Although the fping -b case is kindof pathological, I've seen the same
>> crash when ssh/scping files across to the board, so it does occur in
>> real usage.
>
> RX DMA is troublesome with the MUSB code, and there are some bugfixes
> pending which should affect it.  (Posted to linux-usb over the last
> week or two.)
>
> Do these problems show up with DMA disabled?

I guess you mean with CONFIG_MUSB_PIO_ONLY - yes, I've tried that. I
don't observe the Rx DMA problems as described previously in that
configuration, no ........ However I instead I see hard-lockups with
no obvious cause and no messages printed to the console. (The only
repeatable one I've found so far is exiting cyclictest with ^C. Not
good). These lockups could well be and probably are unrelated, but
none-the-less, it's very troubling!

I've uploaded my defconfig here:
http://hugovincent.com/files/lkml-20090407/
along with a log of the bootup process. I've enabled a bunch of debug
options and self-tests. You can see the rather verbose output of some
spinlock tests (I think) failing early in the bootup process,
somewhere in timer initialization (I think?).

Regards,
Hugo
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Preempt-RT on OMAP3?

[David Brownell]

> > RX DMA is troublesome with the MUSB code, and there are some bugfixes
> > pending which should affect it.  (Posted to linux-usb over the last
> > week or two.)
> >
> > Do these problems show up with DMA disabled?
> 
> I guess you mean with CONFIG_MUSB_PIO_ONLY - yes, I've tried that. I
> don't observe the Rx DMA problems as described previously in that
> configuration, no ........ 

Good...


> However I instead I see hard-lockups with 
> no obvious cause and no messages printed to the console. (The only
> repeatable one I've found so far is exiting cyclictest with ^C. Not
> good). These lockups could well be and probably are unrelated, but
> none-the-less, it's very troubling!

Given the bootlog excerpt you posted, I'm thinking there are
still some basic goofy things with the RT patches you're using
even outside the scope of MUSB.  Basic as in timer tick and
kernel thread setup; lots of things look goofy.


 
> I've uploaded my defconfig here:
> http://hugovincent.com/files/lkml-20090407/
> along with a log of the bootup process. I've enabled a bunch of debug
> options and self-tests. You can see the rather verbose output of some
> spinlock tests (I think) failing early in the bootup process,
> somewhere in timer initialization (I think?).

Those look like lockdep things.  Get a more complete boot log
and maybe someone will be able to sort out what's up.

- Dave



> 
> Regards,
> Hugo
> 
> 



--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Preempt-RT on OMAP3?

[Hugo Vincent]

On Tue, Apr 7, 2009 at 2:27 PM, David Brownell <david-b@pacbell.net> wrote:
>
>> > RX DMA is troublesome with the MUSB code, and there are some bugfixes
>> > pending which should affect it.  (Posted to linux-usb over the last
>> > week or two.)
>> >
>> > Do these problems show up with DMA disabled?
>>
>> I guess you mean with CONFIG_MUSB_PIO_ONLY - yes, I've tried that. I
>> don't observe the Rx DMA problems as described previously in that
>> configuration, no ........
>
> Good...

So based on what you've seen, do you think the queued patches for MUSB
you mentioned will fix these problems?

>> However I instead I see hard-lockups with
>> no obvious cause and no messages printed to the console. (The only
>> repeatable one I've found so far is exiting cyclictest with ^C. Not
>> good). These lockups could well be and probably are unrelated, but
>> none-the-less, it's very troubling!
>
> Given the bootlog excerpt you posted, I'm thinking there are
> still some basic goofy things with the RT patches you're using
> even outside the scope of MUSB.  Basic as in timer tick and
> kernel thread setup; lots of things look goofy.
>

Here is a complete boot log + config:
http://hugovincent.com/files/lkml-20090407/boot2.log

Who is working on OMAP3 -rt? Does anyone have any tips for tracking
down the apparent basic problems David mentioned (timer tick, kernel
thread setup)?

Thanks,
Hugo
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Preempt-RT on OMAP3?

[David Brownell]

On Monday 06 April 2009, Hugo Vincent wrote:
> Here is a complete boot log + config:
> http://hugovincent.com/files/lkml-20090407/boot2.log

Erm, not very complete actually.  Enable DEBUG_LL to see
more early messages ... like the ones starting right
after the kernel decompression messages.

Also, re those udev-induced messages:

Remounting root file system...
uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 0
Buffer I/O error on device mtdblock0, logical block 0
uncorrectable error : <3>uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 8
Buffer I/O error on device mtdblock0, logical block 1
end_request: I/O error, dev mtdblock0, sector 16
Buffer I/O error on device mtdblock0, logical block 2
uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 24
Buffer I/O error on device mtdblock0, logical block 3
uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 0
Buffer I/O error on device mtdblock0, logical block 0

You shouldn't need mtdblock unless you run JFSS2, so that's
the quick way to get rid of them:  take that out of your
kernel configuration.  Else, add "mtdblock*" to
the "KERNEL==... ; goto persistent_storage_end" check in

 /etc/udev/rules.d/60-persistent-storage.rules

I understand the next version of udev will fix that.

- Dave

Re: Preempt-RT on OMAP3?

[Hugo Vincent]

On Tue, Apr 7, 2009 at 3:36 PM, David Brownell <david-b@pacbell.net> wrote:
> On Monday 06 April 2009, Hugo Vincent wrote:
>> Here is a complete boot log + config:
>> http://hugovincent.com/files/lkml-20090407/boot2.log
>
> Erm, not very complete actually.  Enable DEBUG_LL to see
> more early messages ... like the ones starting right
> after the kernel decompression messages.

How's this?
http://hugovincent.com/files/lkml-20090407/boot3.log

(In case it isn't clear, we get messages twice because console and
debug_LL are on the same serial port. I also had to increase
CONFIG_LOG_BUF_SHIFT to get a complete log in dmesg.)

> Also, re those udev-induced messages:
>
> Remounting root file system...
> uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 0
> Buffer I/O error on device mtdblock0, logical block 0
> uncorrectable error : <3>uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 8
> Buffer I/O error on device mtdblock0, logical block 1
> end_request: I/O error, dev mtdblock0, sector 16
> Buffer I/O error on device mtdblock0, logical block 2
> uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 24
> Buffer I/O error on device mtdblock0, logical block 3
> uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 0
> Buffer I/O error on device mtdblock0, logical block 0
>
> You shouldn't need mtdblock unless you run JFSS2, so that's
> the quick way to get rid of them:  take that out of your
> kernel configuration.  Else, add "mtdblock*" to
> the "KERNEL==... ; goto persistent_storage_end" check in
>
>  /etc/udev/rules.d/60-persistent-storage.rules
>
> I understand the next version of udev will fix that.

Thanks for that. Unfortunately I am using JFFS2 for now - perhaps I
should switch to UBIFS.

-- Hugo
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Preempt-RT on OMAP3?

[Hugo Vincent]

On Tue, Apr 7, 2009 at 4:19 PM, Hugo Vincent <hugo.vincent@gmail.com> wrote:
> On Tue, Apr 7, 2009 at 3:36 PM, David Brownell <david-b@pacbell.net> wrote:
>> On Monday 06 April 2009, Hugo Vincent wrote:
>>> Here is a complete boot log + config:
>>> http://hugovincent.com/files/lkml-20090407/boot2.log
>>
>> Erm, not very complete actually.  Enable DEBUG_LL to see
>> more early messages ... like the ones starting right
>> after the kernel decompression messages.
>
> How's this?
> http://hugovincent.com/files/lkml-20090407/boot3.log
>
> (In case it isn't clear, we get messages twice because console and
> debug_LL are on the same serial port. I also had to increase
> CONFIG_LOG_BUF_SHIFT to get a complete log in dmesg.)

Can anyone give me any pointers on where to start for fixing the
problems shown in the above boot log?

It looks like some fairly low level locking bugs (spinlock vs
raw_spinlock maybe?) in twl4030 IRQ handling and GP timer/clock event
source setup.

Hugo
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Preempt-RT on OMAP3?

[David Brownell]

[-- Attachment #1: Type: text/plain, Size: 1206 bytes --]

On Tuesday 07 April 2009, Hugo Vincent wrote:
> > http://hugovincent.com/files/lkml-20090407/boot3.log
>
> Can anyone give me any pointers on where to start for fixing the
> problems shown in the above boot log?

You'll have to start finding out about all the funky rules
which apply to the -RT kernels, I think.

As a rule, getting drivers to work in RT kernels involves
some changes.  Not all of those changes can work in mainline
kernels.  Some of the changes are driver issues; while some
are changes in RT framework code.  Some are bugfixes.

There are a lot of reasons why not all the RT patches have
made it to mainline ...

 
> It looks like some fairly low level locking bugs (spinlock vs
> raw_spinlock maybe?) in twl4030 IRQ handling and GP timer/clock event
> source setup.

The first lockdep warning is about some IRQ dispatch code.

I happen to have the appended patches sitting around; they
might affect this particular problem (or might not).  I don't
know if they'd even apply to the RT kernel.

Alternatively, there's some odd rule about using workqueues
in the current RT code.  Like not being able to trigger them
from all the usual contexts.  If so, that seems buglike to me.

- Dave


[-- Attachment #2: genirq-chipthread.patch --]
[-- Type: text/x-diff, Size: 4110 bytes --]

From: David Brownell <dbrownell@users.sourceforge.net>
Subject: GENIRQ: add handle_threaded_irq() flow handler

Define a new flow handler, handle_threaded_irq(), for IRQ threads
to use when chaining IRQs.

Unlike existing flow handlers, handle_simple_irq() and siblings,
this one is used only from sleep-capable contexts.  It always calls
irqaction handlers from that same (shared) sleep-capable context.

This is independent of Thomas' irq threading patchset, and can be
viewed as a complement to it.  This adds support for IRQs whose
handlers must *ONLY* ever run in thread contexts ... instead of
offloading code from hardirq context into a thread.  Another way
this differs is that it doesn't create more kernel threads; it
only leverages an existing thread.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
---
 include/linux/irq.h |    7 ++++-
 kernel/irq/chip.c   |   61 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+), 2 deletions(-)

--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -278,8 +278,8 @@ static inline int irq_balancing_disabled
 extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action);
 
 /*
- * Built-in IRQ handlers for various IRQ types,
- * callable via desc->chip->handle_irq()
+ * IRQ flow handlers for various IRQ types, callable via
+ * generic_handle_irq*() or desc->handle_irq()
  */
 extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
 extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
@@ -288,6 +288,9 @@ extern void handle_simple_irq(unsigned i
 extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
 extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
 
+/* Flow handler that must only be called from sleeping context */
+extern void handle_threaded_irq(unsigned int irq, struct irq_desc *desc);
+
 /*
  * Monolithic do_IRQ implementation.
  */
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -300,6 +300,67 @@ static inline void mask_ack_irq(struct i
 }
 
 /**
+ *	handle_threaded_irq - flow handler reusing current irq thread
+ *	@irq:	the interrupt number
+ *	@desc:	the interrupt description structure for this irq
+ *	Context: irq thread, with IRQs enabled
+ *
+ *	IRQ threads which demultiplex IRQs may use this flow handler
+ *	to chain those demultiplexed IRQs to subsidiary handlers, when
+ *	all that IRQ dispatch logic must run in sleeping contexts.
+ *
+ *	Examples include some multifunction I2C and SPI based devices
+ *	(where access to registers, including ones involved in IRQ
+ *	dispatching, requires sleeping) that have multiple independent
+ *	maskable interupts.
+ *
+ *	The irq thread using this flow handler must handle any ack,
+ *	clear, mask or unmask issues needed.
+ */
+void
+handle_threaded_irq(unsigned int irq, struct irq_desc *desc)
+{
+	struct irqaction *action;
+	irqreturn_t action_ret;
+
+	spin_lock_irq(&desc->lock);
+
+	if (unlikely(desc->status & IRQ_INPROGRESS))
+		goto out_unlock;
+	desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
+	kstat_incr_irqs_this_cpu(irq, desc);
+
+	action = desc->action;
+	if (unlikely(!action || (desc->status & IRQ_DISABLED)))
+		goto out_unlock;
+
+	desc->status |= IRQ_INPROGRESS;
+	spin_unlock_irq(&desc->lock);
+
+	/* simplified handle_IRQ_event():  no random sampling;
+	 * IRQs are always enabled so action->handler may sleep;
+	 * no hooks for handing off to yet another irq thread.
+	 */
+	action_ret = IRQ_NONE;
+	do {
+		/* REVISIT can we get some explicit knowledge that this
+		 * handler expects to run in thread context?  Maybe an
+		 * IRQF_THREADED check, or a new handler type ...
+		 */
+		action_ret |= action->handler(irq, action->dev_id);
+		action = action->next;
+	} while (action);
+
+	if (!noirqdebug)
+		note_interrupt(irq, desc, action_ret);
+
+	spin_lock_irq(&desc->lock);
+	desc->status &= ~IRQ_INPROGRESS;
+out_unlock:
+	spin_unlock_irq(&desc->lock);
+}
+
+/**
  *	handle_simple_irq - Simple and software-decoded IRQs.
  *	@irq:	the interrupt number
  *	@desc:	the interrupt description structure for this irq

[-- Attachment #3: genirq-twl.patch --]
[-- Type: text/x-diff, Size: 3770 bytes --]

From: David Brownell <dbrownell@users.sourceforge.net>
Subject: twl4030: use new handle_threaded_irq() flow handler

Make the toplevel twl4030 irq dispatch code use the new 
handle_threaded_irq() flow handler.  Also, minor cleanup,
use the newish generic_handle_irq_desc().

Since that flow handler guarantees the IRQ handlers are
called only in a normal (sleeping) thread context, remove
some of the workarounds for the lockdep goofage whereby
it breaks various drivers by forcing IRQF_DISABLED on.
 
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
---
 drivers/mfd/twl4030-irq.c     |   15 +++++----------
 drivers/rtc/rtc-twl4030.c     |    8 --------
 drivers/usb/otg/twl4030-usb.c |    8 --------
 3 files changed, 5 insertions(+), 26 deletions(-)

--- a/drivers/mfd/twl4030-irq.c
+++ b/drivers/mfd/twl4030-irq.c
@@ -215,7 +215,6 @@ static int twl4030_irq_thread(void *data
 		}
 
 		/* these handlers deal with the relevant SIH irq status */
-		local_irq_disable();
 		for (module_irq = twl4030_irq_base;
 				pih_isr;
 				pih_isr >>= 1, module_irq++) {
@@ -235,10 +234,9 @@ static int twl4030_irq_thread(void *data
 					note_interrupt(module_irq, d,
 							IRQ_NONE);
 				else
-					d->handle_irq(module_irq, d);
+					generic_handle_irq_desc(module_irq, d);
 			}
 		}
-		local_irq_enable();
 
 		desc->chip->unmask(irq);
 	}
@@ -578,7 +576,7 @@ static inline int sih_read_isr(const str
 }
 
 /*
- * Generic handler for SIH interrupts ... we "know" this is called
+ * Generic handler for SIH interrupts ... we know this is called
  * in task context, with IRQs enabled.
  */
 static void handle_twl4030_sih(unsigned irq, struct irq_desc *desc)
@@ -588,10 +586,7 @@ static void handle_twl4030_sih(unsigned 
 	int isr;
 
 	/* reading ISR acks the IRQs, using clear-on-read mode */
-	local_irq_enable();
 	isr = sih_read_isr(sih);
-	local_irq_disable();
-
 	if (isr < 0) {
 		pr_err("twl4030: %s SIH, read ISR error %d\n",
 			sih->name, isr);
@@ -658,7 +653,7 @@ int twl4030_sih_setup(int module)
 		irq = irq_base + i;
 
 		set_irq_chip_and_handler(irq, &twl4030_sih_irq_chip,
-				handle_edge_irq);
+				handle_threaded_irq);
 		set_irq_chip_data(irq, agent);
 		activate_irq(irq);
 	}
@@ -666,7 +661,7 @@ int twl4030_sih_setup(int module)
 	status = irq_base;
 	twl4030_irq_next += i;
 
-	/* replace generic PIH handler (handle_simple_irq) */
+	/* replace generic PIH handler (handle_threaded_irq) */
 	irq = sih_mod + twl4030_irq_base;
 	set_irq_data(irq, agent);
 	set_irq_chained_handler(irq, handle_twl4030_sih);
@@ -719,7 +714,7 @@ int twl_init_irq(int irq_num, unsigned i
 
 	for (i = irq_base; i < irq_end; i++) {
 		set_irq_chip_and_handler(i, &twl4030_irq_chip,
-				handle_simple_irq);
+				handle_threaded_irq);
 		activate_irq(i);
 	}
 	twl4030_irq_next = i;
--- a/drivers/rtc/rtc-twl4030.c
+++ b/drivers/rtc/rtc-twl4030.c
@@ -325,14 +325,6 @@ static irqreturn_t twl4030_rtc_interrupt
 	int res;
 	u8 rd_reg;
 
-#ifdef CONFIG_LOCKDEP
-	/* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which
-	 * we don't want and can't tolerate.  Although it might be
-	 * friendlier not to borrow this thread context...
-	 */
-	local_irq_enable();
-#endif
-
 	res = twl4030_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG);
 	if (res)
 		goto out;
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -576,14 +576,6 @@ static irqreturn_t twl4030_usb_irq(int i
 	struct twl4030_usb *twl = _twl;
 	int status;
 
-#ifdef CONFIG_LOCKDEP
-	/* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which
-	 * we don't want and can't tolerate.  Although it might be
-	 * friendlier not to borrow this thread context...
-	 */
-	local_irq_enable();
-#endif
-
 	status = twl4030_usb_linkstat(twl);
 	if (status != USB_LINK_UNKNOWN) {
 

Re: Preempt-RT on OMAP3?

[Hugo Vincent]

Cheers for that David.

Those patches still apply cleanly, but don't seem to affect this
particular problem.

I'm now using the 2.6.29.1 patch and the 2.6.29.1-rt5 patch against
Linux-omap 90e758af52ba803cba233fabee81176d99589f09. Here is the log
now:
http://hugovincent.com/files/lkml-20090407/boot4.log

I've spent enough time on this already, so I think I'll wait and see
if anyone takes on fixing these issues, and hope that my MUSB Rx DMA
problems go away when the pending patches hit. The RT patchset already
is working well enough for me in my application, and the only reason I
would absolutely *need* to fix it is because of nagging doubts about
possible deadlocks or crashes after I've deployed my board into the
field...

Thanks for all your help.

Hugo

On Thu, Apr 9, 2009 at 10:21 AM, David Brownell <david-b@pacbell.net> wrote:
> On Tuesday 07 April 2009, Hugo Vincent wrote:
>> > http://hugovincent.com/files/lkml-20090407/boot3.log
>>
>> Can anyone give me any pointers on where to start for fixing the
>> problems shown in the above boot log?
>
> You'll have to start finding out about all the funky rules
> which apply to the -RT kernels, I think.
>
> As a rule, getting drivers to work in RT kernels involves
> some changes.  Not all of those changes can work in mainline
> kernels.  Some of the changes are driver issues; while some
> are changes in RT framework code.  Some are bugfixes.
>
> There are a lot of reasons why not all the RT patches have
> made it to mainline ...
>
>
>> It looks like some fairly low level locking bugs (spinlock vs
>> raw_spinlock maybe?) in twl4030 IRQ handling and GP timer/clock event
>> source setup.
>
> The first lockdep warning is about some IRQ dispatch code.
>
> I happen to have the appended patches sitting around; they
> might affect this particular problem (or might not).  I don't
> know if they'd even apply to the RT kernel.
>
> Alternatively, there's some odd rule about using workqueues
> in the current RT code.  Like not being able to trigger them
> from all the usual contexts.  If so, that seems buglike to me.
>
> - Dave
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html