AcoSail/kernel_optimize_test
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21ae40404f
kernel_optimize_test/drivers/power
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NeilBrown 21ae40404f twl4030_charger: Increase current carefully while watching voltage. 
The USB Battery Charging spec (BC1.2) suggests a dedicated
charging port can deliver from 0.5 to 5.0A at between 4.75 and 5.25
volts.

To choose the "correct" current voltage setting requires a trial
and error approach: try to draw current and see if the voltage drops
too low.

Even with a configured Standard Downstream Port, it may not be possible
to reliably pull 500mA - depending on cable quality and source
quality I have reports of charging failure due to the voltage dropping
too low.

To address both these concerns, this patch introduce incremental
current setting.
The current pull from VBUS is increased in steps of 20mA every 100ms
until the target is reached or until the measure voltage drops below
4.75V.  If the voltage does go too low, the target current is reduced
by 20mA and kept there.

This applies to currents selected automatically, or to values
set via sysfs.  So setting a large value will cause the maximum
available to be used - up to the limit of 1.7A imposed by the
hardware.

Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-08-05 05:23:04 +02:00
..
avs PM / AVS: rockchip-io: add driver handling Rockchip io domains 2014-09-25 09:57:23 -07:00
reset power/reset: zx: Remove unnecessary include file 2015-07-27 15:33:30 +02:00
88pm860x_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
88pm860x_charger.c power_supply: 88pm860x_charger: Do not call free_irq() twice 2015-05-29 16:06:10 +02:00
ab8500_bmdata.c
ab8500_btemp.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
ab8500_charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
ab8500_fg.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
abx500_chargalg.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
apm_power.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
axp288_charger.c power: axp288_charger: fix for API change 2015-06-26 17:44:09 -07:00
axp288_fuel_gauge.c power: axp288_fuel_gauge: Constify platform_device_id 2015-05-23 19:44:14 +02:00
bq27x00_battery.c power: bq27x00_battery: Checkpatch fixes 2015-07-24 17:34:06 +02:00
bq2415x_charger.c power_supply: bq2415x_charger: Add ACPI support 2015-05-23 20:03:00 +02:00
bq24190_charger.c power_supply: Drop owner assignment from i2c_driver 2015-07-13 13:48:29 +02:00
bq24257_charger.c power_supply: bq24257: use flags argument of devm_gpiod_get 2015-06-13 04:06:38 +02:00
bq24735-charger.c power_supply: bq24735: Convert to using managed resources 2015-07-27 16:09:53 +02:00
bq25890_charger.c power_supply: bq25890: use flags argument of devm_gpiod_get 2015-06-13 04:06:33 +02:00
charger-manager.c power_supply: charger-manager: Add parent for power supply 2015-05-23 20:06:19 +02:00
collie_battery.c power_supply: fix oops in collie_battery driver 2015-04-30 17:39:40 +02:00
da9030_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
da9052-battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
da9150-charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
ds2760_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
ds2780_battery.c power: ds2780_battery: clean up eeprom read/write functions 2015-07-27 16:28:54 +02:00
ds2781_battery.c power: ds2781_battery: clean up eeprom read/write functions 2015-07-27 16:28:54 +02:00
ds2782_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
generic-adc-battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
goldfish_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
gpio-charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
intel_mid_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
ipaq_micro_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
isp1704_charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
jz4740-battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
Kconfig power_supply: Add support for Richtek RT9455 battery charger 2015-05-30 03:34:55 +02:00
lp8727_charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
lp8788-charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
ltc2941-battery-gauge.c power/ltc2941-battery-gauge.c: Use the devicetree node name as supply name 2015-07-24 16:52:24 +02:00
Makefile power_supply: Add support for Richtek RT9455 battery charger 2015-05-30 03:34:55 +02:00
max8903_charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
max8925_power.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
max8997_charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
max8998_charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
max14577_charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
max17040_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
max17042_battery.c power_supply: max17042: Add OF support for setting thresholds 2015-06-10 16:14:03 +02:00
max77693_charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
olpc_battery.c power: olpc_battery: clean up eeprom read function 2015-07-27 16:28:54 +02:00
pcf50633-charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
pda_power.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
pm2301_charger.c power_supply: Drop owner assignment from i2c_driver 2015-07-13 13:48:29 +02:00
pm2301_charger.h power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
pmu_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
power_supply_core.c power_supply: Correct kerneldoc copy paste errors 2015-06-19 14:21:01 +02:00
power_supply_leds.c power_supply: Use wrappers to avoid races when registering power supply 2015-05-23 20:06:19 +02:00
power_supply_sysfs.c power_supply: sysfs: Bring back write to writeable properties 2015-06-10 16:10:59 +02:00
power_supply.h
rt5033_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
rt9455_charger.c power_supply: rt9455_charger: Properly notify userspace about charging events 2015-07-09 04:04:56 +02:00
rx51_battery.c rx51-battery: Set name to rx51-battery 2015-08-03 17:14:57 +02:00
s3c_adc_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
sbs-battery.c sbs-battery: add option to always register battery 2015-06-10 16:18:46 +02:00
smb347-charger.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
test_power.c kernel/params: constify struct kernel_param_ops uses 2015-05-28 11:32:10 +09:30
tosa_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
tps65090-charger.c power: constify of_device_id array 2015-03-20 13:23:06 +01:00
twl4030_charger.c twl4030_charger: Increase current carefully while watching voltage. 2015-08-05 05:23:04 +02:00
twl4030_madc_battery.c power: twl4030_madc_battery: Add missing MODULE_ALIAS 2015-04-06 19:39:57 +02:00
wm97xx_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
wm831x_backup.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
wm831x_power.c wm831x_power: Fix off-by-one at free_irq() 2015-06-15 12:30:32 +02:00
wm8350_power.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00
z2_battery.c power_supply: Change ownership from driver to core 2015-03-13 23:15:51 +01:00