On 5/3/2012 8:19 PM, Jon Hunter wrote:
Hi Vaibhav,
On 05/03/2012 12:07 AM, Hiremath, Vaibhav wrote:
On Thu, May 03, 2012 at 01:26:18, Hunter, Jon wrote:
Hi Vaibhav,
On 05/02/2012 08:56 AM, Vaibhav Hiremath wrote:
Current OMAP code supports couple of clocksource options based
on compilation flag (CONFIG_OMAP_32K_TIMER). The 32KHz sync-timer
and a gptimer which can run on 32KHz or system clock (e.g 38.4 MHz)
This patch series cleans up the existing 32k-sync timer implementation,
movind SoC init code to respective files (mach-omap1/timer32k.c and
mach-omap2/timer.c) and uses kernel parameter to override the default
clocksource of "counter_32k", also in order to support some OMAP based
derivative SoCs like AM33XX which doesn't have 32K sync-timer hardware IP,
adds hwmod lookup for omap2+ devices, and if lookup fails then
fall back to gp-timer.
if(use_gptimer_clksrc == true)
gptimer clocksource init;
else if (counter_32 init == false)
/* Fallback to gptimer */
gptimer clocksource init(;
With this, we should be able to support multi-omap boot
including devices with/without 32k-sync timer.
This patch-series has been boot tested on AM37xEVM platform, it
would be helpful if somebody help me to validate it on OMAP1/2
platforms.
The patches are also available at (based on linux-omap/master) -
https://github.com/hvaibhav/am335x-linux 32ksync-timer-cleanup
I was testing on OMAP4 and I found that the gptimer was always being set by default. I noticed that currently the HWMOD for counter_32k on OMAP4 is commented and hence was not being found. Please can you include the following with your series?
The 32kcounter hwmod entry is already enabled in linux-omap/master branch.
Your baseline looks pretty old to me, are you not using linux-omap/master?
Ha! My "old" baseline is the latest mainline kernel ;-)
I guess this is a bit out-dated in terms of omap now. Sorry I missed
that fact your patches were on top of the omap kernel in the changelog.
Yeah, in fact Paul submitted a big series to clean / re-organize and add
missing hwmod for 3.5. So any change on hwmod should be done on top of
Paul's branch.
Regards,
Benoit
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