Re: AM335x: Beaglebone stops to boot with current git kernel

[Vaibhav Hiremath <hvaibhav@ti.com>]

On 11/22/2012 1:30 AM, Igor Mazanov wrote:
> On Wed, Nov 21, 2012 at 9:38 PM, Tony Lindgren <tony@atomide.com> wrote:
>> * Jean Pihet <jean.pihet@newoldbits.com> [121114 08:43]:
>>> On Wed, Nov 14, 2012 at 4:28 PM, Igor Mazanov <i.mazanov@gmail.com> wrote:
>>>>
>>>> Beaglebone boot process is broken with the current git kernel. I use
>>>> omap2plus_defconfig for tests.
>>>>
>>>> It looks like the boot process stops due to the last changes in the AM33xx
>>>> clock sysbsystem. A following patch resolves this issue:
>> ...
>>
>>> The patch should change the name of the hwmod entry as well, can you
>>> fold this change in the current patch?
>>
>> Any news on updating this?
> 
> The current kernel boots, but after a switching to CCF doesn't work
> the debugss - it's just disabled in the current hwmod code. So, it
> looks like we can't  use JTAG to connect to the running kernel.
> 

just resumed from vacation...

JTAG clock will get disabled because, CONFIG_OMAP_RESET_CLOCKS will
disable unused clocks, so as debugss clock.

There is another thread started by Joel on the similar issue,

http://www.mail-archive.com/linux-omap@vger.kernel.org/msg80863.html

Something below should be done for debugss on AM33xx,

diff --git a/arch/arm/mach-omap2/clock33xx_data.c
b/arch/arm/mach-omap2/clock33xx_data.c
index 17e3de5..60e0b53 100644
--- a/arch/arm/mach-omap2/clock33xx_data.c
+++ b/arch/arm/mach-omap2/clock33xx_data.c
@@ -584,6 +584,9 @@ static struct clk debugss_ick = {
        .clkdm_name     = "l3_aon_clkdm",
        .parent         = &dpll_core_m4_ck,
        .ops            = &clkops_omap2_dflt,
+#ifdef CONFIG_DEBUG_KERNEL
+       .flags          = ENABLE_ON_INIT,
+#endif
        .enable_reg     = AM33XX_CM_WKUP_DEBUGSS_CLKCTRL,
        .enable_bit     = AM33XX_MODULEMODE_SWCTRL,
        .recalc         = &followparent_recalc,



Thanks,
Vaibhav

> Regards,
> Igor.
> 
>> Regards,
>>
>> Tony
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