On Mon, Dec 22, 2008 at 02:50:45PM +0200, Jarkko Nikula wrote: > On Mon, 22 Dec 2008 04:34:22 -0600 > "ext Otto Solares" <solca@xxxxxxxx> wrote: > > > Hi all! > > > > I want to resurrect missing support for the Nokia Internet Tablets > > starting with the N8x0s for my NITdroid project, which uses just > > standard Linux kernel APIs. > > > > So first I would like to ask some very newbie questions: > > > > -Is there any ongoing effort to support these devices in latest kernels > > at the same level as the latest Nokia production kernel (2.6.21-omap)? > > > "make n800_defconfig" in linux-omap tree is a very good start. > > > -I don't plan to suspend but just sleep while idling, is this a good > > approach to power management (pm)? > > > > -I read about the pm branch, where can I pull it? > > > Probably you read already this "N810 suspend" thread? > > http://marc.info/?t=122937538800002&r=1&w=2 > > Short: N800 can do sleep_while_idle but GPS uart clock prevents it > currently in N810 and PM branch may have solution to idle it. Will try it. > > -Does CONFIG_NO_HZ works for this devices? > > > Was working at least some months ago with N800. > > > -AFAIK the recent removals of the N800 sound driver was because it was > > not written for ALSA OMAP SoC API, right? > > > That's correct. N810 audio is already supported with SND_OMAP_SOC_N810 > but N800 would require to have ASoC codec driver for TSC2301 and DAI > link driver for EAC, at least for exact sample rates. > > This is due TSC2301 which can be only slave so in order to get stardard > sample rates, EAC or McBSP would require to use external master clock > to them and EAC_AC_MCLK and McBSP2.CLKS are not routed into same pads > like other four EAC and McBSP2 signals. > > Most probably McBSP DAI & TSC2301 would work also if using internal 96 > MHz as a source clock to McBSP. Then sample rate would be e.g. > 96 MHz / 32 / 32 = 46.875 kHz. Excellent summary, that was what I need to know, I'll take a look. > > If it is lack of time of the original developers, I would like to step > > in, willing to try to complete this work as long as you are willing to > > support me with answers to my newbie questions as this devices are in > > plenty operation today but the Nokia kernel is getting really old and > > it's a good thing if we can port all the drivers to standard Linux API. > > > I welcome you to step in this porting effort! I help what I can :-) What about my other questions? cpufreq and dvfs? Thx for your support! -otto -- 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
