From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: power management problems in ehci-omap Date: Tue, 6 Feb 2018 10:16:23 -0800 Message-ID: <20180206181623.GC21573@atomide.com> References: <20180204000335.29812776@kemnade.info> <20180204093831.44322452@kemnade.info> <20180206074201.479405e7@aktux> <20180206160452.GA21573@atomide.com> <20180206175509.4d80e930@aktux> <20180206171737.GB21573@atomide.com> <20180206185452.34d01d77@aktux> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT Return-path: Content-Disposition: inline In-Reply-To: <20180206185452.34d01d77@aktux> Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Andreas Kemnade Cc: Michael Nazzareno Trimarchi , USB list , Linux OMAP Mailing List , Discussions about the Letux Kernel , Roger Quadros List-Id: linux-omap@vger.kernel.org * Andreas Kemnade [180206 18:04]: > On Tue, 6 Feb 2018 09:17:37 -0800 > Tony Lindgren wrote: > > uarts=$(find /sys/class/tty/tty[SO]*/power/ -type d 2>/dev/null) > > for uart in $uarts; do > > echo enabled > $uart/wakeup 2>&1 > > echo auto > $uart/control 2>&1 > > done > > > > hmm, this looks a bit like runtime suspend. Not only that, it enables wakeup for UART also for suspend :) That is if your dts has it configured with interrupts-extended for the console UART like omap3-beagle-xm.dts has for example. Seems like the gta04 dts don't have these.. And you also want to have chosen with stdout-path = &uart3 or whatever the debug UART is for earlycon to work. > I mean suspend aka echo mem >/sys/power/state > > > echo -n 1 > /sys/kernel/debug/pm_debug/enable_off_mode And the above will enable SoC and PMIC off modes, which will also take the suspend power to some much much lower value :) You need to configure the PMIC too depending if the oscillator can be turned off, in that case set "ti,twl4030-power-idle-osc-off". That too seems to be missing in gta04 dts files.. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: power management problems in ehci-omap From: Tony Lindgren Message-Id: <20180206181623.GC21573@atomide.com> Date: Tue, 6 Feb 2018 10:16:23 -0800 To: Andreas Kemnade Cc: Michael Nazzareno Trimarchi , USB list , Linux OMAP Mailing List , Discussions about the Letux Kernel , Roger Quadros List-ID: KiBBbmRyZWFzIEtlbW5hZGUgPGFuZHJlYXNAa2VtbmFkZS5pbmZvPiBbMTgwMjA2IDE4OjA0XToK PiBPbiBUdWUsIDYgRmViIDIwMTggMDk6MTc6MzcgLTA4MDAKPiBUb255IExpbmRncmVuIDx0b255 QGF0b21pZGUuY29tPiB3cm90ZToKPiA+IHVhcnRzPSQoZmluZCAvc3lzL2NsYXNzL3R0eS90dHlb U09dKi9wb3dlci8gLXR5cGUgZCAyPi9kZXYvbnVsbCkKPiA+IGZvciB1YXJ0IGluICR1YXJ0czsg ZG8KPiA+IAllY2hvIGVuYWJsZWQgPiAkdWFydC93YWtldXAgMj4mMQo+ID4gCWVjaG8gYXV0byA+ ICR1YXJ0L2NvbnRyb2wgMj4mMQo+ID4gZG9uZQo+ID4gCj4gCj4gaG1tLCB0aGlzIGxvb2tzIGEg Yml0IGxpa2UgcnVudGltZSBzdXNwZW5kLgoKTm90IG9ubHkgdGhhdCwgaXQgZW5hYmxlcyB3YWtl dXAgZm9yIFVBUlQgYWxzbyBmb3Igc3VzcGVuZCA6KQoKVGhhdCBpcyBpZiB5b3VyIGR0cyBoYXMg aXQgY29uZmlndXJlZCB3aXRoIGludGVycnVwdHMtZXh0ZW5kZWQKZm9yIHRoZSBjb25zb2xlIFVB UlQgbGlrZSBvbWFwMy1iZWFnbGUteG0uZHRzIGhhcyBmb3IgZXhhbXBsZS4KU2VlbXMgbGlrZSB0 aGUgZ3RhMDQgZHRzIGRvbid0IGhhdmUgdGhlc2UuLiBBbmQgeW91IGFsc28gd2FudAp0byBoYXZl IGNob3NlbiB3aXRoIHN0ZG91dC1wYXRoID0gJnVhcnQzIG9yIHdoYXRldmVyIHRoZSBkZWJ1ZwpV QVJUIGlzIGZvciBlYXJseWNvbiB0byB3b3JrLgoKPiBJIG1lYW4gc3VzcGVuZCBha2EgZWNobyBt ZW0gPi9zeXMvcG93ZXIvc3RhdGUKPiAKPiA+IGVjaG8gLW4gMSA+IC9zeXMva2VybmVsL2RlYnVn L3BtX2RlYnVnL2VuYWJsZV9vZmZfbW9kZQoKQW5kIHRoZSBhYm92ZSB3aWxsIGVuYWJsZSBTb0Mg YW5kIFBNSUMgb2ZmIG1vZGVzLCB3aGljaCB3aWxsIGFsc28KdGFrZSB0aGUgc3VzcGVuZCBwb3dl ciB0byBzb21lIG11Y2ggbXVjaCBsb3dlciB2YWx1ZSA6KSBZb3UgbmVlZAp0byBjb25maWd1cmUg dGhlIFBNSUMgdG9vIGRlcGVuZGluZyBpZiB0aGUgb3NjaWxsYXRvciBjYW4gYmUgdHVybmVkCm9m ZiwgaW4gdGhhdCBjYXNlIHNldCAidGksdHdsNDAzMC1wb3dlci1pZGxlLW9zYy1vZmYiLiBUaGF0 IHRvbwpzZWVtcyB0byBiZSBtaXNzaW5nIGluIGd0YTA0IGR0cyBmaWxlcy4uCgpSZWdhcmRzLAoK VG9ueQotLS0KVG8gdW5zdWJzY3JpYmUgZnJvbSB0aGlzIGxpc3Q6IHNlbmQgdGhlIGxpbmUgInVu c3Vic2NyaWJlIGxpbnV4LXVzYiIgaW4KdGhlIGJvZHkgb2YgYSBtZXNzYWdlIHRvIG1ham9yZG9t b0B2Z2VyLmtlcm5lbC5vcmcKTW9yZSBtYWpvcmRvbW8gaW5mbyBhdCAgaHR0cDovL3ZnZXIua2Vy bmVsLm9yZy9tYWpvcmRvbW8taW5mby5odG1sCg==