Ticket #848 (closed enhancement: fixed)

Opened 12 years ago

Last modified 2 years ago

A charger mode for uboot

Reported by: Tuukka.Hastrup@… Owned by: michael@…
Priority: high Milestone:
Component: u-boot Version: current svn head
Severity: minor Keywords:
Cc: buglog@… Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: PatchReviewResult:
Reproducible:

Description

Current power management implications are difficult for users to understand as
we don't hide the underlying hardware details. One part we should do is a
special mode in uboot that can be entered for charging the phone when it's off.

One simple part of this is the logic to not boot a kernel while there would be
too little charge (10%?) in the battery to start and shut down the system
cleanly with still some charge left to get back to uboot. We could simply power
off the phone if there is too little charge, but better usability could be
achieved with a mode that shows the charging progress: whether we are currently
charging and the current battery charge percentage.

In the mode, the user could have a menu with these entries:

  1. Fully shut down the phone (going back to 100mA charge?)
  2. Toggle: Do/don't boot automatically as soon as there's enough charge
  3. Boot now (inactive if not enough charge yet)

If there is some trouble in the charging process or the source disappears, we
should show a warning message. If this continues, the message should be stored
for display at the next boot, and the phone should be fully shut down.

Change History

comment:1 Changed 12 years ago by laforge@…

1) in a bettery without coulomb counter there is no way to obtain battery charge
percentage
2) if the battery is discharged too much, we cannot even start u-boot but will
have to do 100ma charging until u-boot can be charged
3) solving this properly will require lots of time and lots of measurements, as
well as fixing all current leaks caused by unclean driver shutdown, etc.
otherwise the battery will continue to discharge when the device is powered off
any way.

all in all, I don't really see anyone looking into this issue anytime soon. it
requires all our resources to only get the basics working. anything else is a
nice disctraction for some future time.

comment:2 Changed 12 years ago by Tuukka.Hastrup@…

I'm willing to help the project get there sooner, and I'm learning what it
takes. I should've perhaps included from the start a link to a more general
document I'm working on based on my current understanding:
http://wiki.openmoko.org/wiki/Power_management_requirements

comment:3 Changed 12 years ago by laforge@…

  • Severity changed from normal to enhancement

comment:4 Changed 11 years ago by willie_chen@…

  • Owner changed from laforge@… to michael@…

comment:5 Changed 11 years ago by andy

  • Status changed from new to closed
  • Resolution set to fixed

Werner did implement this in U-Boot some months ago, for GTA02 anyway, closing as fixed.

comment:6 Changed 2 years ago by Chassmetly

Doxycycline Order Online Canada <a href=http://cial5mg.xyz/cialis-prices.php>Cialis Prices</a> Viagra Plus 400 Mg Stendra Avanafil Erectile Dysfunction Cash Delivery In Internet Aylesbury Vale <a href=http://lasix.ccrpdc.com/lasix-online-prices.php>Lasix Online Prices</a> Viagra Et Fertilite Keflex Swelling <a href=http://zol1.xyz/zoloft-50mg.php>Zoloft 50mg</a> Canadian Pharmacies Propecia Low Price Healthcare <a href=http://kama1.xyz/map.php>Kamagra On Line</a> Zithromax Z Pak 250 Mg Clobetasol Purchasing Cod Accepted <a href=http://zol1.xyz/mail-order-zoloft.php>Mail Order Zoloft</a> Propecia Ottawa Viagra Wirkung Lasst Nach <a href=http://cial1.xyz/best-cialis-online.php>Best Cialis Online</a> Cialis Para Hipertensos Cialis Plus Dapoxetine <a href=http://zol1.xyz/order-zoloft-online-usa.php>Order Zoloft Online Usa</a> Nombre Generico Del Viagra Viagra Prescription <a href=http://cial1.xyz/cialis-free-offer.php>Cialis Free Offer</a> Viagra Generico Priligy Legal Australia <a href=http://cial5mg.xyz/generic-cialis-cheapest.php>Generic Cialis Cheapest</a> Commander Generique Cialis Super Active Viagra En Ligne En France <a href=http://strattera.ccrpdc.com/low-cost-strattera-online.php>Low Cost Strattera Online</a> Gel De Kamagra Priligy Funziona 2012 <a href=http://viag1.xyz/biuy-viagra-online.php>Biuy Viagra Online</a> Cialis Und Levitra Zithromax Chlamydia Eye <a href=http://zol1.xyz/zoloft-online-prices.php>Zoloft Online Prices</a> Medikament Cialis 20mg Is Lasix Hard On The Kidneys <a href=http://viag1.xyz/cheap-viagra-25mg.php>Cheap Viagra 25mg</a> Bayer Levitra 20mg Dove Comprare Cialis Senza Ricetta <a href=http://cial5mg.xyz/cialis-generic.php>Cialis Generic</a> How Strong Is 250 Grams O Amoxicillian Levitra Soft Tabs Online <a href=http://strattera.ccrpdc.com/cheap-strattera.php>Cheap Strattera</a> Purchase Celebrex No Prescription Achat Cialis Andorre <a href=http://zol1.xyz/prices-zoloft.php>Prices Zoloft</a> How Do You Spell Keflex Viagra Original Use <a href=http://cial5mg.xyz/ordina-cialis-online.php>Ordina Cialis Online</a> Levitra Costo In Farmacia Isotretinoin sotret in germany over night <a href=http://prednisone.ccrpdc.com/prednisone-online.php>Prednisone Online</a> India Suppliers Of Cialis Levitra 20mg Prix <a href=http://kama1.xyz/kamagra-tablet.php>Kamagra Tablet</a> How Safe Is Keflex Antibiotic Where To Purchase Progesterone By Money Order <a href=http://cial1.xyz/cialis-cheap.php>Cialis Cheap</a> Zithromax Erythromycin Cheapest Synthroid No Prescription <a href=http://viag1.xyz/purchase-viagra.php>Purchase Viagra</a> Buy The Blue Pill Canada Generic Lowest Price Viagra <a href=http://cial5mg.xyz/cialis-buy.php>Cialis Buy</a> Buy Amoxicillin Online Usa Rx Express Online <a href=http://xenical.ccrpdc.com/alli-where-to-buy.php>Alli Where To Buy</a> Cialis Para Mujeres Cialis Precio En Andorra <a href=http://kama1.xyz/how-much-is-kamagra.php>How Much Is Kamagra</a> Online Pharmacy In Canada Infant Mono After Taking Amoxicillin <a href=http://cial5mg.xyz/cialis-buy.php>Cialis Buy</a> Need Acticin Levitra Rivenditori <a href=http://cial5mg.xyz/fast-delivery-cialis.php>Fast Delivery Cialis</a> Cialis Generika Serios Levitra Tiempo De Duracion <a href=http://lasix.ccrpdc.com/lasix-achat.php>Lasix Achat</a> Zithromax Lyme Treatment Kamagra En Ligne Avis <a href=http://doxycycline.ccrpdc.com/vibramycin-online-store.php>Vibramycin Online Store</a> Levitra 10mg Orange Kamagra Hair Loss <a href=http://cial5mg.xyz/buy-cialis-cheap.php>Buy Cialis Cheap</a> Ou Acheter En Ligne Dapoxetine Quel Est Le Prix Du Cialis <a href=http://kama1.xyz/buy-kamagra.php>Buy Kamagra</a> Comprare Viagra In Germania

Note: See TracTickets for help on using tickets.