On Tue, Oct 6, 2015 at 5:07 PM, Felipe Balbi <balbi@xxxxxx> wrote: > Belisko Marek <marek.belisko@xxxxxxxxx> writes: > >> Hi, >> >> On Tue, Oct 6, 2015 at 4:03 PM, Belisko Marek <marek.belisko@xxxxxxxxx> wrote: >>> Hi Felipe, >>> >>> On Tue, Oct 6, 2015 at 4:00 PM, Felipe Balbi <balbi@xxxxxx> wrote: >>>> >>>> Hi, >>>> >>>> Belisko Marek <marek.belisko@xxxxxxxxx> writes: >>>>> Hi Tony, >>>>> >>>>> I'm using custom am33xx board where mpu voltage can be changed through >>>>> gpio regulator on 4.1 (latest stable) kernel. I defined gpio-regulator >>>>> node and also operating-points to DT. Gpio regulator seems to be >>>>> working fine but during probing cpufreq-dt I get error: >>>>> failed to init cpufreq table: -61 >>>>> >>>>> I did small investigation and seem that dev_pm_opp_init_cpufreq_table >>>>> fails at first condition dev_pm_opp_get_opp_count <= 0 and this is >>>>> because opp_list is empty. So it seems that any opp for am33xx aren't >>>>> defined if I'm getting it right. I did look to mach-omap2/opp3xxx_data >>>>> but there is nothing am33xx specific. It is known problem or exist >>>>> some patches around to fix that? Many thanks. >>>> >>>> OPP initialization is not in mainline yet, there are some out-of-tree >>>> patches which TI has been working on. If you want to use them, have a >>>> look at TI's vendor kernel at [1] >>> Thanks for link. One thing which is still not puzzled before I use 3.9 >>> kernel and it was working fine >>> it's stops working when bumped to 4.1. >> >> Sorry information was incorrect. On 3.9 kernel we did use tps, pmic >> now we have only gpio regulator so this is the difference. > > okay, if it's only a regulator how can you set different voltages ? > Seems like you won't be able to do anything more than enable/disable a > voltage rail. Sorry I wasn't precise. There are 2 gpios's with some small logic so we have 4 voltage states. > > -- > balbi BR, marek -- as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Freelance Developer Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite twitter: #opennandra web: http://open-nandra.com -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
