linux-toradex.git/drivers/power/power_supply_sysfs.c, branch v3.19.3

power-supply: Check for failures only when we can fail

2014-09-16T09:01:37+00:00

In power_supply_show_property() routine, we call ->get_property() conditionally
and should check for failure in that case only. There is no point comparing
'ret' for errors when 'ret' is surely zero.

Signed-off-by: Viresh Kumar 
Signed-off-by: Sebastian Reichel

power_supply: Add boot and calibration attributes

2014-09-06T19:05:04+00:00

Usually PMIC's come with coulomb counting mechanism which can be
used to implement a Fuel Gauginig solution in Software itself.
One of key input to these SW Fuel Gauge solutioons is the boot up
parameters like boot voltage and boot current.

This patch adds the VOLTAGE_BOOT and CURRENT_BOOT power supply attributes
to report bootup voltage and current.

This patch also adds CALIBRATE power supply attribute which useful is
for calibrating the battery/coulomb counter.

Signed-off-by: Ramakrishna Pallala 
Signed-off-by: Sebastian Reichel

power_supply: Add inlmt,iterm, min/max temp props

2014-07-18T21:40:23+00:00

Add new power supply properties for input current, charge termination
current, min and max temperature

POWER_SUPPLY_PROP_TEMP_MIN - minimum operatable temperature
POWER_SUPPLY_PROP_TEMP_MAX - maximum operatable temperature

POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT - input current limit programmed
by charger. Indicates the input current for a charging source.

POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT - Charge termination current used
to detect the end of charge condition

Signed-off-by: Jenny TC 
Acked-by: Pavel Machek 
Signed-off-by: Sebastian Reichel

power_supply: Replace strict_strtol() with kstrtol()

2013-08-09T21:49:49+00:00

The usage of strict_strtol() is not preferred, because strict_strtol() is
obsolete. Thus, kstrtol() should be used.

Signed-off-by: Jingoo Han 
Signed-off-by: Anton Vorontsov

power_supply: Add watchdog and safety timer expiries under PROP_HEALTH_*

2013-01-06T02:51:18+00:00

As most of the charger chips come with two kinds of safety features
related to timing:

1. Watchdog Timer (interms of seconds/mins)
2. Safety Timer (interms of hours)

This patch adds these to fault causes in POWER_SUPPLY_PROP_HEALTH_* enums
so that whenever there is either watchdog timeout or safety timer timeout
driver could notify the user space accurately about the fault and will
also be helpful for debug.

Signed-off-by: Ramakrishna Pallala 
Signed-off-by: Anton Vorontsov

power_supply: Add support for CHARGE_CONTROL_* attributes

2012-11-18T04:21:43+00:00

Add support for power supply attributes CHARGE_CONTROL_LIMIT
and CHARGE_CONTROL_LIMIT_MAX.

These new attributes will enable the user space to implement
custom charging algorithms based on platform state.

Signed-off-by: Ramakrishna Pallala 
Signed-off-by: Anton Vorontsov

power_supply: Add new power supply properties CHARGE_CURRENT/VOLTAGE_MAX

2012-08-23T04:59:15+00:00

There are different types of chargers avalibale like AC, Solar, USB,
etc..  Even in USB we have different types SDP/DCP/CDP/ACA and all these
chargers have different o/p ratings. For example SDP supports only 500mA
of charge current whereas AC charger can support upto 8A or more.

Similarly batteries also come with charge current and voltage ratings
and these ratings vary depending on its capacity and the technology
used.

This patch adds two new power supply properties
CONSTANT_CHARGE_CURRENT_MAX and CONSTANT_CHARGE_CURRENT_MAX.

Signed-off-by: Ramakrishna Pallala 
Signed-off-by: Anton Vorontsov

power_supply: Add new power supply AUTHENTIC property

2012-08-23T02:56:37+00:00

It is possible that users can use non-standard chargers or use invalid
batteries especially with mobile devices.

This patch adds a new power supply property called 'AUTHENTIC' to
indicate this to the user(user space).

Signed-off-by: Ramakrishna Pallala 
Signed-off-by: Anton Vorontsov

power_supply: Add min/max alert properties for CAPACITY, TEMP, TEMP_AMBIENT

2012-07-14T03:41:58+00:00

Minimum and maximum alerts on power supply properties will help or allow
the user space to "proactively" create policies like connect/disconnect
charger or stop/start the user apps based on capacity or temperature
parameters.

These parameters can be used to avoid unnecessary polling from user space
and even from kernel space if the underlying HW can support INT triggers
(ex: max17042/47).

This patch adds the following power supply alert type properties:

 CAPACITY_ALERT_MIN
 CAPACITY_ALERT_MAX
 TEMP_ALERT_MIN
 TEMP_ALERT_MAX
 TEMP_AMBIENT_ALERT_MIN
 TEMP_AMBIENT_ALERT_MAX

Signed-off-by: Ramakrishna Pallala 
Signed-off-by: Anton Vorontsov

power_supply: Add constant charge_current and charge_voltage properties

2012-06-19T23:46:58+00:00

Constant Charge Current(CC) is charging parameter which limit the
maximum current which can be pumped into the battery during charge cycle.

Constant Charge Voltage(CV) is also charging parameter which limit the
maximum voltage that battery can reach during charge cycle.

It is very common practice that at low or high temperatures we
do not charge the batteries upto it's fullest charge voltage
to avoid battery and user safety issues.

These sysfs properties will be useful for debug and to implement
certain user space policies like "Charging limited due to OverTemp".

Signed-off-by: Ramakrishna Pallala 
Signed-off-by: Anton Vorontsov