diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-04 14:25:14 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-04 14:25:14 -0700 |
commit | a897a10141ae4deb43346fbf2ae2a5149bd7fd5a (patch) | |
tree | 14dce2d8e155ca50e19c3ac5e3563fe55ca0cc67 /Documentation | |
parent | eceeae414edccb07fad683011c0c65abe8a3a554 (diff) | |
parent | bfa953d336cdd713f6968c85ca820ef22333dc35 (diff) | |
download | linux-a897a10141ae4deb43346fbf2ae2a5149bd7fd5a.tar.bz2 |
Merge tag 'for-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
Pull power supply and reset updates from Sebastian Reichel:
"New drivers:
- Linear ltc3651 charger driver
- Motorola CPCAP battery fuel-gauge driver
New chip/feature support:
- bq27xxx: prepare for chip data setup
- axp20x_battery: support max charge current setup
New core features:
- add Apple Brick ID type
- support "supplied-from" device property for generic ACPI/pdata support
- support strings for sysfs properties representing enums
- introduce battery-info (backend is DT only for now)
- provide reboot-mode header globally
.. and misc fixes"
* tag 'for-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (39 commits)
power: supply: sbs-battery: Don't needlessly set CAPACITY_MODE
power: supply: sbs-battery: Prevent CAPACITY_MODE races
power: supply: bq24735: remove incorrect le16_to_cpu calls
power: supply: sbs-battery: remove incorrect le16_to_cpu calls
power: supply: cpcap-charger: Add missing power_supply_config
power: supply: twl4030-charger: move allocation of iio channel to the beginning
power: supply: twl4030-charger: allocate iio by devm_iio_channel_get() and fix error path
power: supply: core: constify psy_tcd_ops.
dt-bindings: power: supply: cpcap-battery: Add power-supplies property
dt-bindings: power: supply: move max8903-charger.txt to proper location
dt-bindings: power: supply: move maxim,max14656.txt to proper location
power: supply: twl4030_charger: Use sysfs_match_string() helper
power: reset: reboot-mode: Make include file global
power: supply: axp20x_battery: add DT support for battery max constant charge current
power: supply: axp20x_battery: add support for DT battery
power: supply: bq27xxx: Add power_supply_battery_info support
power: supply: bq27xxx: Add chip data memory read/write support
power: supply: bq27xxx: Add bulk transfer bus methods
dt-bindings: power: supply: bq27xxx: Add monitored-battery documentation
power: supply: core: Add power_supply_prop_precharge
...
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/ABI/testing/sysfs-class-power-twl4030 | 17 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/power/supply/battery.txt | 57 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/power/supply/bq27xxx.txt | 31 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/power/supply/cpcap-battery.txt | 31 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt | 27 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/power/supply/max8903-charger.txt (renamed from Documentation/devicetree/bindings/power/max8903-charger.txt) | 0 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/power/supply/maxim,max14656.txt (renamed from Documentation/devicetree/bindings/power_supply/maxim,max14656.txt) | 0 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/property-units.txt | 2 | ||||
-rw-r--r-- | Documentation/power/power_supply_class.txt | 31 |
9 files changed, 165 insertions, 31 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-power-twl4030 b/Documentation/ABI/testing/sysfs-class-power-twl4030 index be26af0f1895..b4fd32d210c5 100644 --- a/Documentation/ABI/testing/sysfs-class-power-twl4030 +++ b/Documentation/ABI/testing/sysfs-class-power-twl4030 @@ -1,20 +1,3 @@ -What: /sys/class/power_supply/twl4030_ac/max_current - /sys/class/power_supply/twl4030_usb/max_current -Description: - Read/Write limit on current which may - be drawn from the ac (Accessory Charger) or - USB port. - - Value is in micro-Amps. - - Value is set automatically to an appropriate - value when a cable is plugged or unplugged. - - Value can the set by writing to the attribute. - The change will only persist until the next - plug event. These event are reported via udev. - - What: /sys/class/power_supply/twl4030_usb/mode Description: Changing mode for USB port. diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt new file mode 100644 index 000000000000..f4d3b4a10b43 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/battery.txt @@ -0,0 +1,57 @@ +Battery Characteristics + +The devicetree battery node provides static battery characteristics. +In smart batteries, these are typically stored in non-volatile memory +on a fuel gauge chip. The battery node should be used where there is +no appropriate non-volatile memory, or it is unprogrammed/incorrect. + +Upstream dts files should not include battery nodes, unless the battery +represented cannot easily be replaced in the system by one of a +different type. This prevents unpredictable, potentially harmful, +behavior should a replacement that changes the battery type occur +without a corresponding update to the dtb. + +Required Properties: + - compatible: Must be "simple-battery" + +Optional Properties: + - voltage-min-design-microvolt: drained battery voltage + - energy-full-design-microwatt-hours: battery design energy + - charge-full-design-microamp-hours: battery design capacity + - precharge-current-microamp: current for pre-charge phase + - charge-term-current-microamp: current for charge termination phase + - constant-charge-current-max-microamp: maximum constant input current + - constant-charge-voltage-max-microvolt: maximum constant input voltage + +Battery properties are named, where possible, for the corresponding +elements in enum power_supply_property, defined in +https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/linux/power_supply.h + +Batteries must be referenced by chargers and/or fuel-gauges +using a phandle. The phandle's property should be named +"monitored-battery". + +Example: + + bat: battery { + compatible = "simple-battery"; + voltage-min-design-microvolt = <3200000>; + energy-full-design-microwatt-hours = <5290000>; + charge-full-design-microamp-hours = <1430000>; + precharge-current-microamp = <256000>; + charge-term-current-microamp = <128000>; + constant-charge-current-max-microamp = <900000>; + constant-charge-voltage-max-microvolt = <4200000>; + }; + + charger: charger@11 { + .... + monitored-battery = <&bat>; + ... + }; + + fuel_gauge: fuel-gauge@22 { + .... + monitored-battery = <&bat>; + ... + }; diff --git a/Documentation/devicetree/bindings/power/supply/bq27xxx.txt b/Documentation/devicetree/bindings/power/supply/bq27xxx.txt index b0c95ef63e68..6858e1a804ad 100644 --- a/Documentation/devicetree/bindings/power/supply/bq27xxx.txt +++ b/Documentation/devicetree/bindings/power/supply/bq27xxx.txt @@ -1,7 +1,7 @@ -Binding for TI BQ27XXX fuel gauge family +TI BQ27XXX fuel gauge family Required properties: -- compatible: Should contain one of the following: +- compatible: contains one of the following: * "ti,bq27200" - BQ27200 * "ti,bq27210" - BQ27210 * "ti,bq27500" - deprecated, use revision specific property below @@ -26,11 +26,28 @@ Required properties: * "ti,bq27425" - BQ27425 * "ti,bq27441" - BQ27441 * "ti,bq27621" - BQ27621 -- reg: integer, i2c address of the device. +- reg: integer, I2C address of the fuel gauge. + +Optional properties: +- monitored-battery: phandle of battery characteristics node + The fuel gauge uses the following battery properties: + + energy-full-design-microwatt-hours + + charge-full-design-microamp-hours + + voltage-min-design-microvolt + Both or neither of the *-full-design-*-hours properties must be set. + See Documentation/devicetree/bindings/power/supply/battery.txt Example: -bq27510g3 { - compatible = "ti,bq27510g3"; - reg = <0x55>; -}; + bat: battery { + compatible = "simple-battery"; + voltage-min-design-microvolt = <3200000>; + energy-full-design-microwatt-hours = <5290000>; + charge-full-design-microamp-hours = <1430000>; + }; + + bq27510g3: fuel-gauge@55 { + compatible = "ti,bq27510g3"; + reg = <0x55>; + monitored-battery = <&bat>; + }; diff --git a/Documentation/devicetree/bindings/power/supply/cpcap-battery.txt b/Documentation/devicetree/bindings/power/supply/cpcap-battery.txt new file mode 100644 index 000000000000..a04efa22da01 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/cpcap-battery.txt @@ -0,0 +1,31 @@ +Motorola CPCAP PMIC battery driver binding + +Required properties: +- compatible: Shall be "motorola,cpcap-battery" +- interrupts: Interrupt specifier for each name in interrupt-names +- interrupt-names: Should contain the following entries: + "lowbph", "lowbpl", "chrgcurr1", "battdetb" +- io-channels: IIO ADC channel specifier for each name in io-channel-names +- io-channel-names: Should contain the following entries: + "battdetb", "battp", "chg_isense", "batti" +- power-supplies: List of phandles for power-supplying devices, as + described in power_supply.txt. Typically a reference + to cpcap_charger. + +Example: + +cpcap_battery: battery { + compatible = "motorola,cpcap-battery"; + interrupts-extended = < + &cpcap 5 0 &cpcap 3 0 + &cpcap 20 0 &cpcap 54 0 + >; + interrupt-names = + "lowbph", "lowbpl", + "chrgcurr1", "battdetb"; + io-channels = <&cpcap_adc 0 &cpcap_adc 1 + &cpcap_adc 5 &cpcap_adc 6>; + io-channel-names = "battdetb", "battp", + "chg_isense", "batti"; + power-supplies = <&cpcap_charger>; +}; diff --git a/Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt b/Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt new file mode 100644 index 000000000000..71f2840e8209 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/ltc3651-charger.txt @@ -0,0 +1,27 @@ +ltc3651-charger + +Required properties: + - compatible: "lltc,ltc3651-charger" + - lltc,acpr-gpios: Connect to ACPR output. See remark below. + +Optional properties: + - lltc,fault-gpios: Connect to FAULT output. See remark below. + - lltc,chrg-gpios: Connect to CHRG output. See remark below. + +The ltc3651 outputs are open-drain type and active low. The driver assumes the +GPIO reports "active" when the output is asserted, so if the pins have been +connected directly, the GPIO flags should be set to active low also. + +The driver will attempt to aquire interrupts for all GPIOs to detect changes in +line state. If the system is not capabale of providing interrupts, the driver +cannot report changes and userspace will need to periodically read the sysfs +attributes to detect changes. + +Example: + + charger: battery-charger { + compatible = "lltc,ltc3651-charger"; + lltc,acpr-gpios = <&gpio0 68 GPIO_ACTIVE_LOW>; + lltc,fault-gpios = <&gpio0 64 GPIO_ACTIVE_LOW>; + lltc,chrg-gpios = <&gpio0 63 GPIO_ACTIVE_LOW>; + }; diff --git a/Documentation/devicetree/bindings/power/max8903-charger.txt b/Documentation/devicetree/bindings/power/supply/max8903-charger.txt index f0f4e12b076e..f0f4e12b076e 100644 --- a/Documentation/devicetree/bindings/power/max8903-charger.txt +++ b/Documentation/devicetree/bindings/power/supply/max8903-charger.txt diff --git a/Documentation/devicetree/bindings/power_supply/maxim,max14656.txt b/Documentation/devicetree/bindings/power/supply/maxim,max14656.txt index e03e85ae6572..e03e85ae6572 100644 --- a/Documentation/devicetree/bindings/power_supply/maxim,max14656.txt +++ b/Documentation/devicetree/bindings/power/supply/maxim,max14656.txt diff --git a/Documentation/devicetree/bindings/property-units.txt b/Documentation/devicetree/bindings/property-units.txt index 12278d79f6c0..0849618a9df0 100644 --- a/Documentation/devicetree/bindings/property-units.txt +++ b/Documentation/devicetree/bindings/property-units.txt @@ -25,8 +25,10 @@ Distance Electricity ---------------------------------------- -microamp : micro amps +-microamp-hours : micro amp-hours -ohms : Ohms -micro-ohms : micro Ohms +-microwatt-hours: micro Watt-hours -microvolt : micro volts Temperature diff --git a/Documentation/power/power_supply_class.txt b/Documentation/power/power_supply_class.txt index 0c72588bd967..300d37896e51 100644 --- a/Documentation/power/power_supply_class.txt +++ b/Documentation/power/power_supply_class.txt @@ -115,28 +115,33 @@ of charge when battery became full/empty". It also could mean "value of charge when battery considered full/empty at given conditions (temperature, age)". I.e. these attributes represents real thresholds, not design values. +ENERGY_FULL, ENERGY_EMPTY - same as above but for energy. + CHARGE_COUNTER - the current charge counter (in µAh). This could easily be negative; there is no empty or full value. It is only useful for relative, time-based measurements. +PRECHARGE_CURRENT - the maximum charge current during precharge phase +of charge cycle (typically 20% of battery capacity). +CHARGE_TERM_CURRENT - Charge termination current. The charge cycle +terminates when battery voltage is above recharge threshold, and charge +current is below this setting (typically 10% of battery capacity). + CONSTANT_CHARGE_CURRENT - constant charge current programmed by charger. CONSTANT_CHARGE_CURRENT_MAX - maximum charge current supported by the power supply object. -INPUT_CURRENT_LIMIT - input current limit programmed by charger. Indicates -the current drawn from a charging source. -CHARGE_TERM_CURRENT - Charge termination current used to detect the end of charge -condition. - -CALIBRATE - battery or coulomb counter calibration status CONSTANT_CHARGE_VOLTAGE - constant charge voltage programmed by charger. CONSTANT_CHARGE_VOLTAGE_MAX - maximum charge voltage supported by the power supply object. +INPUT_CURRENT_LIMIT - input current limit programmed by charger. Indicates +the current drawn from a charging source. + CHARGE_CONTROL_LIMIT - current charge control limit setting CHARGE_CONTROL_LIMIT_MAX - maximum charge control limit setting -ENERGY_FULL, ENERGY_EMPTY - same as above but for energy. +CALIBRATE - battery or coulomb counter calibration status CAPACITY - capacity in percents. CAPACITY_ALERT_MIN - minimum capacity alert value in percents. @@ -174,6 +179,18 @@ issued by external power supply will notify supplicants via external_power_changed callback. +Devicetree battery characteristics +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Drivers should call power_supply_get_battery_info() to obtain battery +characteristics from a devicetree battery node, defined in +Documentation/devicetree/bindings/power/supply/battery.txt. This is +implemented in drivers/power/supply/bq27xxx_battery.c. + +Properties in struct power_supply_battery_info and their counterparts in the +battery node have names corresponding to elements in enum power_supply_property, +for naming consistency between sysfs attributes and battery node properties. + + QA ~~ Q: Where is POWER_SUPPLY_PROP_XYZ attribute? |