Battery charging, battery status on Nokia N9, N950
Subsystems (4)
Hi!
I'm fighting with battery status & battery charging on Nokia N9/N950. https://elinux.org/N950 contains enough info to get battery status (and below is first attempt at kernel implementation), but I'm not sure what needs to be done to charge the battery (or at least power phone from USB).
Any ideas?
Thanks,
Pavel
commit ef0a23a4d522489c4aa7be114bbc1acb604b35b6
Author: Pavel <[email protected]> Date: Fri Nov 3 21:34:53 2017 +0100
Add support for bq27521 battery gauge.
arch/arm/boot/dts/omap3-n950-n9.dtsi +20 -0
@@ -276,6 +276,26 @@ &i2c2 { clock-frequency = <400000>; + + bq27521: bq27521 at 55 { + compatible = "ti,bq27521"; + reg = <0x55>; + }; + + + bq24153a at 6b { + compatible = "ti,bq24150a"; + reg = <0x6b>; + + ti,current-limit = <100>; + ti,weak-battery-voltage = <3400>; + ti,battery-regulation-voltage = <4000>; /* FIXME: 4200 */ + ti,charge-current = <500>; /* FIXME: 650 */ + ti,termination-current = <100>; + + ti,resistor-sense = <68>; + ti,usb-charger-detection = <&twl_power>; + }; }; &i2c3 {
drivers/power/supply/bq27xxx_battery.c +47 -0
96 lines not on this page · raw message
drivers/power/supply/bq27xxx_battery_i2c.c +2 -0
@@ -239,6 +239,7 @@ static const struct i2c_device_id bq27xxx_i2c_id_table[] = { { "bq27520g2", BQ27520G2 }, { "bq27520g3", BQ27520G3 }, { "bq27520g4", BQ27520G4 }, + { "bq27521", BQ27521 }, { "bq27530", BQ27530 }, { "bq27531", BQ27530 }, { "bq27541", BQ27541 },
@@ -269,6 +270,7 @@ static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = { { .compatible = "ti,bq27520g2" }, { .compatible = "ti,bq27520g3" }, { .compatible = "ti,bq27520g4" }, + { .compatible = "ti,bq27521" }, { .compatible = "ti,bq27530" }, { .compatible = "ti,bq27531" }, { .compatible = "ti,bq27541" },
include/linux/power/bq27xxx_battery.h +1 -0
@@ -14,6 +14,7 @@ enum bq27xxx_chip {BQ27520G2 ,/* bq27520G2 */ BQ27520G3 ,/* bq27520G3 */ BQ27520G4 ,/* bq27520G4 */ +BQ27521 ,/* bq27521 */ BQ27530 ,/* bq27530, bq27531 */ BQ27541 ,/* bq27541, bq27542, bq27546, bq27742 */ BQ27545, /* bq27545 */
Signature · 9 lines
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Hi!
Quoted 5 lines
I'm fighting with battery status & battery charging on Nokia N9/N950. https://elinux.org/N950 contains enough info to get battery status (and below is first attempt at kernel implementation), but I'm not sure what needs to be done to charge the battery (or at least power phone from USB).
Nemo recovery system (2824336 Jul 25 2016 zImage-moslo) seems to either charge phone from USB or at power it from USB.
But 4.13 does not; it seems there are two separate issue.
First, something needs to be done to enable system power from the USB. I'm not sure what that one would be :-(. Then, it should be possible to ask bq24153 to charge the battery.
Best regards,
Pavel
Signature · 9 lines
(english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20171107/be8b935e/attachment.sig>
Hi!
Quoted 7 lines
Quoted 6 lines
I'm fighting with battery status & battery charging on Nokia N9/N950. https://elinux.org/N950 contains enough info to get battery status (and below is first attempt at kernel implementation), but I'm not sure what needs to be done to charge the battery (or at least power phone from USB).
Quoted 8 lines
Nemo recovery system (2824336 Jul 25 2016 zImage-moslo) seems to either charge phone from USB or at power it from USB.
But 4.13 does not; it seems there are two separate issue.
First, something needs to be done to enable system power from the USB. I'm not sure what that one would be :-(. Then, it should be possible to ask bq24153 to charge the battery.
If someone has schematics or pointer to them.. for N9 or N950, that would be useful :-).
Thanks,
Pavel
Signature · 9 lines
(english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20171107/a4127a03/attachment.sig>
Hi Pavel
Quoted 12 lines · Pavel Machek
Hi!
Quoted 10 lines
Quoted 6 lines
I'm fighting with battery status & battery charging on Nokia N9/N950. https://elinux.org/N950 contains enough info to get battery status (and below is first attempt at kernel implementation), but I'm not sure what needs to be done to charge the battery (or at least power phone from USB).
Nemo recovery system (2824336 Jul 25 2016 zImage-moslo) seems to either charge phone from USB or at power it from USB.
Quoted 9 lines
Quoted 5 lines
But 4.13 does not; it seems there are two separate issue.
First, something needs to be done to enable system power from the USB. I'm not sure what that one would be :-(. Then, it should be possible to ask bq24153 to charge the battery.
If someone has schematics or pointer to them.. for N9 or N950, that would be useful :-).
You can dump pinctrl and configuration and check if some gpio are used. From reference schematic of this charger you have OTG and CD. Those pins can be just used to enable/disable and boost charging. You should dig a bit in sysfs to figure it out ;)
Michael
Quoted 6 lines
Thanks,
Pavel--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
Quoted 21 lines · Michael Nazzareno Trimarchi
Hi Pavel
Quoted 18 lines · Pavel Machek
Hi!
Quoted 15 lines
Quoted 6 lines
I'm fighting with battery status & battery charging on Nokia N9/N950. https://elinux.org/N950 contains enough info to get battery status (and below is first attempt at kernel implementation), but I'm not sure what needs to be done to charge the battery (or at least power phone from USB).
Nemo recovery system (2824336 Jul 25 2016 zImage-moslo) seems to either charge phone from USB or at power it from USB.
But 4.13 does not; it seems there are two separate issue.
First, something needs to be done to enable system power from the USB. I'm not sure what that one would be :-(. Then, it should be possible to ask bq24153 to charge the battery.
Quoted 8 lines
Quoted 3 lines
If someone has schematics or pointer to them.. for N9 or N950, that would be useful :-).
You can dump pinctrl and configuration and check if some gpio are used. From reference schematic of this charger you have OTG and CD. Those pins can be just used to enable/disable and boost charging. You should dig a bit in sysfs to figure it out ;)
I tried to search old board file from working version -- seemed better than randomly toggling stuff in /sys. But I could not find anything suspicious.
If someone has the schematics, that would be useful.
Best regards,
Pavel
Signature · 9 lines
(english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20171107/b8c1c535/attachment.sig>