Incomplete DM814x support in 4.3

Incomplete DM814x support in 4.3

[Philipp Rosenberger]

Hi,

I have seen with pleasure that some support for DM814x was integrated to the kernel. But it seems incomplete I get various errors when I try to boot the kernel on a DM814x/AM387x based board.

[    0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
[    0.000000] ti_clk_get_reg_addr: clk-provider not found for timer1_mux_ck!
[    0.000000] ti_clk_get_reg_addr: clk-provider not found for timer2_mux_ck!
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: CPU: 0 PID: 0 at /home/ilu/projects/lenze/linux/arch/arm/mach-omap2/timer.c:344 omap_dm_timer_init_one+0x1a4/0x2ec()
[    0.000000] Cannot set timer parent clock, no PLL clock driver?
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.3.0-dirty #47
[    0.000000] Hardware name: Generic ti814x (Flattened Device Tree)
[    0.000000] [<c0017894>] (unwind_backtrace) from [<c0013c04>] (show_stack+0x10/0x14)
[    0.000000] [<c0013c04>] (show_stack) from [<c02cf6bc>] (dump_stack+0x84/0x9c)
[    0.000000] [<c02cf6bc>] (dump_stack) from [<c003e994>] (warn_slowpath_common+0x7c/0xb8)
[    0.000000] [<c003e994>] (warn_slowpath_common) from [<c003ea00>] (warn_slowpath_fmt+0x30/0x40)
[    0.000000] [<c003ea00>] (warn_slowpath_fmt) from [<c07a5e34>] (omap_dm_timer_init_one+0x1a4/0x2ec)
[    0.000000] [<c07a5e34>] (omap_dm_timer_init_one) from [<c07a5fc0>] (omap2_gp_clockevent_init+0x44/0xcc)
[    0.000000] [<c07a5fc0>] (omap2_gp_clockevent_init) from [<c07a65c0>] (omap3_gptimer_timer_init+0x20/0x3c)
[    0.000000] [<c07a65c0>] (omap3_gptimer_timer_init) from [<c079ab08>] (start_kernel+0x25c/0x400)
[    0.000000] [<c079ab08>] (start_kernel) from [<8000807c>] (0x8000807c)
[    0.000000] ---[ end trace cb88537fdc8fa200 ]---
[    0.000000] timer->fclk: 'devosc_ck'
[    0.000000] src: 'devosc_ck'
[    0.000000] OMAP clockevent source: timer2 at 20000000 Hz
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: CPU: 0 PID: 0 at /home/ilu/projects/customer/linux/arch/arm/mach-omap2/timer.c:344 omap_dm_timer_init_one+0x1a4/0x2ec()
[    0.000000] Cannot set timer parent clock, no PLL clock driver?
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W       4.3.0-dirty #47
[    0.000000] Hardware name: Generic ti814x (Flattened Device Tree)
[    0.000000] [<c0017894>] (unwind_backtrace) from [<c0013c04>] (show_stack+0x10/0x14)
[    0.000000] [<c0013c04>] (show_stack) from [<c02cf6bc>] (dump_stack+0x84/0x9c)
[    0.000000] [<c02cf6bc>] (dump_stack) from [<c003e994>] (warn_slowpath_common+0x7c/0xb8)
[    0.000000] [<c003e994>] (warn_slowpath_common) from [<c003ea00>] (warn_slowpath_fmt+0x30/0x40)
[    0.000000] [<c003ea00>] (warn_slowpath_fmt) from [<c07a5e34>] (omap_dm_timer_init_one+0x1a4/0x2ec)
[    0.000000] [<c07a5e34>] (omap_dm_timer_init_one) from [<c07a6084>] (omap2_gptimer_clocksource_init+0x3c/0xcc)
[    0.000000] [<c07a6084>] (omap2_gptimer_clocksource_init) from [<c079ab08>] (start_kernel+0x25c/0x400)
[    0.000000] [<c079ab08>] (start_kernel) from [<8000807c>] (0x8000807c)
[    0.000000] ---[ end trace cb88537fdc8fa201 ]---

End in the end it panics with this:
[    0.379442] platform ocp: Cannot lookup hwmod 'l3_main'
[    0.387920] platform 48032000.gpio: Cannot lookup hwmod 'gpio1'
[    0.394638] omap_gpio 48032000.gpio: Could not get gpio dbck. Disable debounce
[    0.402220] omap_gpio 48032000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
[    0.411448] Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa032034
[    0.419419] pgd = c0004000
[    0.422292] [fa032034] *pgd=48011452(bad)
[    0.426528] Internal error: : 1028 [#1] SMP ARM
[    0.431282] Modules linked in:
[    0.434525] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W       4.3.0-dirty #47
[    0.442493] Hardware name: Generic ti814x (Flattened Device Tree)
[    0.448853] task: ce038d40 ti: ce03a000 task.ti: ce03a000
[    0.454511] PC is at omap_gpio_probe+0x1ec/0x604
[    0.459352] LR is at 0x0
[    0.462050] pc : [<c030a9ac>]    lr : [<00000000>]    psr: 60000113
[    0.462050] sp : ce03bce8  ip : fa032034  fp : 00000000
[    0.474043] r10: c030a3a4  r9 : cfb80c64  r8 : c05ad510
[    0.479509] r7 : ce0ecc10  r6 : ce0ecc00  r5 : ce0c3890  r4 : ce0e5a10
[    0.486316] r3 : c0864964  r2 : fa032000  r1 : 00000020  r0 : ffffffff
[    0.493124] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[    0.500558] Control: 10c5387d  Table: 80004019  DAC: 00000051
[    0.506560] Process swapper/0 (pid: 1, stack limit = 0xce03a218)
[    0.512830] Stack: (0xce03bce8 to 0xce03c000)
[    0.517410] bce0:                   c086463c ce0ecc10 ce0ecc10 fffffdfb c086463c c086463c
[    0.525924] bd00: 00000000 00000000 00000000 c03672dc c0367298 c1089698 ce0ecc10 00000000
[    0.534438] bd20: c086463c c036580c 00000000 ce03bd58 c03659a0 00000001 c1089654 c0363dd0
[    0.542952] bd40: ce0822d4 ce0c2294 ce0ecc10 ce0ecc44 c086d0e0 c0365594 ce0ecc10 00000001
[    0.551467] bd60: c086dae8 ce0ecc18 ce0ecc10 c086d0e0 ce0e9810 c0364ca4 ce0ecc18 ce0ecc10
[    0.559979] bd80: 00000000 c03630f8 00000000 00000000 00000000 00000001 ce0ecc00 ce0ecc10
[    0.568493] bda0: 00000000 cfb80cb4 00000000 ce0e9810 00000000 c043a5a4 00000000 cfb80c64
[    0.577006] bdc0: c07ebf5c 00000001 c07f3d78 c043a6c4 00000000 60000193 ce038d40 c057dd74
[    0.585520] bde0: 00000001 00000001 c07f3d78 c008ebbc 60000113 c087fe80 c07ebf5c cfb80c64
[    0.594033] be00: cfb806b8 c07ebf5c 00000001 c07f3d78 ce0e9810 00000000 00000000 c043a720
[    0.602547] be20: 00000001 60000193 ce038d40 c057dd74 00000001 00000001 c07f3d78 c008ebbc
[    0.611062] be40: a0000113 c087fe80 c07ebf5c cfb806b8 cfb804d4 c07ebf5c 00000001 c07f3d78
[    0.619575] be60: ce0e9c10 00000000 00000000 c043a720 00000001 60000193 ce038d40 c057dd74
[    0.628089] be80: 00000001 c07ebf5c 00000000 c008ebbc 60000113 c087fe80 c07f3d78 cfb804d4
[    0.636602] bea0: cfb7f8b8 c07f3d78 c07ebf5c 00000000 00000001 c07e3858 00000071 c043a8a0
[    0.645116] bec0: 00000001 c0438900 c06d3834 c07f3d78 c08082b0 ce0e69c0 c089c000 c079d6a4
[    0.653630] bee0: 00000000 c07ad22c c08082b0 c07ace4c c07e1e1c c079d6c0 00000000 c00098a4
[    0.662144] bf00: ce038d40 c083fd28 ce039280 00000000 ce038d00 00000004 00000006 00000000
[    0.670657] bf20: cfdffb8b c05a1bb8 00000071 c005de6c 00000001 00000000 c076c860 cfdffb95
[    0.679171] bf40: 00000003 00000003 c07f9834 c07f9940 c07f9948 00000003 c089c000 c089c000
[    0.687684] bf60: c07e3840 00000000 c07e3858 c079aebc 00000003 00000003 00000000 c079a594
[    0.696196] bf80: c05777dc 00000000 c05777dc 00000000 00000000 00000000 00000000 00000000
[    0.704710] bfa0: 00000000 c05777e4 00000000 c000f570 00000000 00000000 00000000 00000000
[    0.713223] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    0.721736] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 f3af5f7f ffdefffe
[    0.730261] [<c030a9ac>] (omap_gpio_probe) from [<c03672dc>] (platform_drv_probe+0x44/0xa4)
[    0.738956] [<c03672dc>] (platform_drv_probe) from [<c036580c>] (driver_probe_device+0x1f0/0x2b8)
[    0.748184] [<c036580c>] (driver_probe_device) from [<c0363dd0>] (bus_for_each_drv+0x58/0x8c)
[    0.757054] [<c0363dd0>] (bus_for_each_drv) from [<c0365594>] (__device_attach+0xa4/0x108)
[    0.765656] [<c0365594>] (__device_attach) from [<c0364ca4>] (bus_probe_device+0x88/0x90)
[    0.774167] [<c0364ca4>] (bus_probe_device) from [<c03630f8>] (device_add+0x3b4/0x55c)
[    0.782421] [<c03630f8>] (device_add) from [<c043a5a4>] (of_platform_device_create_pdata+0x80/0xb8)
[    0.791831] [<c043a5a4>] (of_platform_device_create_pdata) from [<c043a6c4>] (of_platform_bus_create+0xdc/0x18c)
[    0.802402] [<c043a6c4>] (of_platform_bus_create) from [<c043a720>] (of_platform_bus_create+0x138/0x18c)
[    0.812257] Code: e1d3c1b4 1a00007b e5d3e034 e082c00c (e59c6000) 
[    0.818631] ---[ end trace cb88537fdc8fa202 ]---
[    0.823591] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[    0.823591] 
[    0.833188] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

I searched for 'l3_main' in the hwmods for dm814x but it is not defined in there.

I didn't find a driver in the tree which is compatible with "ti,dm814-pllss" so no driver for pll handling.

Is there some work in progress to bring the missing parts into the kernel?

Best regards
Philipp Rosenberger

Incomplete DM814x support in 4.3

[Tony Lindgren]

Hi,

Adding linux-omap to Cc.

* Philipp Rosenberger <ilu@linutronix.de> [151118 05:20]:
> Hi,
> 
> I have seen with pleasure that some support for DM814x was integrated to the kernel. But it seems incomplete I get various errors when I try to boot the kernel on a DM814x/AM387x based board.

Sorry for the delay in replying. Current dm8148 support is based on the
bootloader clocks right now so YMMW. I fixed up the basic support for
dm8148 on hp t410 and that is bootable to NFSroot with mainline.

I'll try to post some patches soon for adding the clock driver and more devices.
So far I have GPIOs, Ethernet, USB and MMC working.. Also on dm8148-evm.

I still need to clean up things a bit, hoping to be able to post this week at
some point.

> End in the end it panics with this:
> [    0.379442] platform ocp: Cannot lookup hwmod 'l3_main'
> [    0.387920] platform 48032000.gpio: Cannot lookup hwmod 'gpio1'
> [    0.394638] omap_gpio 48032000.gpio: Could not get gpio dbck. Disable debounce
> [    0.402220] omap_gpio 48032000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.411448] Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa032034

Yup this is what I'm seeing too on dm8148-evm after I got one. It's because of
the missing clocks.

> I searched for 'l3_main' in the hwmods for dm814x but it is not defined in there.

I think I have fixed up that one too.. Need to check :)

> I didn't find a driver in the tree which is compatible with "ti,dm814-pllss" so no driver for pll handling.

I have an initial driver coming up for that.. Heh it also works as a loadable
module on hp t410 :)

> Is there some work in progress to bring the missing parts into the kernel?

Yes, best to coordinate the effort on linux-omap and linux-arm-kernel lists.

FYI, I have these pieces coming up this week:

- Few fixes for for the clock muxes for system timers

- Basic clock driver for dm8148 ADPLLs, still in read-only mode for the PLLs

- DTS + hwmod support for GPIOs, MMC and MUSB

- Minimal board support for j5eco-evm

Then the PWM support done for dm816x should also work on others, and I belive
people are working on getting the DSP supported but don't know the current
status. Maybe somebody can reply on that?

Regards,

Tony