[meta-ti] Kernel Hang I2C1??

[Maupin, Chase]

Josh,

Do you have the I2C2 entry in your DT?  There are examples in the am33xx.dtsi file.

Sincerely,
Chase Maupin
Integration Team Manager
Linux Core Product Development
e-mail: chase.maupin at ti.com
phone: (214) 567-2950

For support:
Forums - http://e2e.ti.com<http://e2e.ti.com/>
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From: meta-ti-bounces at yoctoproject.org [mailto:meta-ti-bounces at yoctoproject.org] On Behalf Of Vanderpool Josh
Sent: Wednesday, April 30, 2014 9:03 AM
To: meta-ti at yoctoproject.org
Subject: [meta-ti] Kernel Hang I2C1??

I have a custom board and expect to use i2c1 on the board but it appears to not allow this in the kernel…
u-boot was able to be modified to support the hardware port i2c1.  Note that that software is 1based and hardware is zero-based…

This is the dump:
·        [    1.482628] ------------[ cut here ]------------
·        [    1.487549] WARNING: CPU: 0 PID: 1 at arch/arm/mach-omap2/omap_device.c:888 omap_device_get_by_hwmod_name+0x94/0xb4()
·        [    1.498803] omap_device_get_by_hwmod_name: no omap_device for i2c1
·        [    1.505365] Modules linked in:
·        [    1.508606] CPU: 0 PID: 1 Comm: swapper Not tainted 3.12.10-ti2013.12.01 #2
·        [    1.515990] Backtrace:
·        [    1.518595] [<c0017880>] (dump_backtrace+0x0/0x10c) from [<c0017a1c>] (show_stack+0x18/0x1c)
·        [    1.527542]  r6:c002f564 r5:00000009 r4:dd083e28 r3:00000000
·        [    1.533567] [<c0017a04>] (show_stack+0x0/0x1c) from [<c0580ba4>] (dump_stack+0x20/0x28)
·        [    1.542068] [<c0580b84>] (dump_stack+0x0/0x28) from [<c0046d08>] (warn_slowpath_common+0x70/0x90)
·        [    1.551480] [<c0046c98>] (warn_slowpath_common+0x0/0x90) from [<c0046dcc>] (warn_slowpath_fmt+0x38/0x40)
·        [    1.561528]  r8:c076b3fc r7:c0768410 r6:c0c8c9ac r5:c084df08 r4:c06b9fa4
·        [    1.568647] [<c0046d94>] (warn_slowpath_fmt+0x0/0x40) from [<c002f564>] (omap_device_get_by_hwmod_name+0x94/0xb4)
·        [    1.579523]  r3:c058be8c r2:c06b6584
·        [    1.583341] [<c002f4d0>] (omap_device_get_by_hwmod_name+0x0/0xb4) from [<c0778280>] (am33xx_pm_init+0x204/0x45c)
·        [    1.594120]  r4:00000000
·        [    1.596808] [<c077807c>] (am33xx_pm_init+


The full capture is http://pastebin.com/VyY8CQ0L

I found where roughly where there might be an issue…pm33xx.c as line#395 states it can only use bus i2c1(one based(I assume this is i2c0))
Note I do not need smart reflex or sleep mode at all so any patches to work around this are welcome.

Thanks

Josh Vanderpool
Electrical Engineer


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