From 8d70d68d7a1b3082ca5a3808be18103a83ae348d Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Fri, 12 Sep 2014 08:53:59 +0200 Subject: devicetree: mfd: max14577: Add device tree bindings document Add document describing device tree bindings for MAX14577 MFD drivers: MFD core, extcon, regulator and charger. Both MAX14577 and MAX77836 chipsets are documented. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Tomasz Figa Acked-by: Andrew Morton Signed-off-by: Lee Jones --- Documentation/devicetree/bindings/mfd/max14577.txt | 146 +++++++++++++++++++++ 1 file changed, 146 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/max14577.txt (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/mfd/max14577.txt b/Documentation/devicetree/bindings/mfd/max14577.txt new file mode 100644 index 000000000000..236264c10b92 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/max14577.txt @@ -0,0 +1,146 @@ +Maxim MAX14577/77836 Multi-Function Device + +MAX14577 is a Multi-Function Device with Micro-USB Interface Circuit, Li+ +Battery Charger and SFOUT LDO output for powering USB devices. It is +interfaced to host controller using I2C. + +MAX77836 additionally contains PMIC (with two LDO regulators) and Fuel Gauge. + + +Required properties: +- compatible : Must be "maxim,max14577" or "maxim,max77836". +- reg : I2C slave address for the max14577 chip (0x25 for max14577/max77836) +- interrupts : IRQ line for the chip. +- interrupt-parent : The parent interrupt controller. + + +Required nodes: + - charger : + Node for configuring the charger driver. + Required properties: + - compatible : "maxim,max14577-charger" + or "maxim,max77836-charger" + - maxim,fast-charge-uamp : Current in uA for Fast Charge; + Valid values: + - for max14577: 90000 - 950000; + - for max77836: 45000 - 475000; + - maxim,eoc-uamp : Current in uA for End-Of-Charge mode; + Valid values: + - for max14577: 50000 - 200000; + - for max77836: 5000 - 100000; + - maxim,ovp-uvolt : OverVoltage Protection Threshold in uV; + In an overvoltage condition, INT asserts and charging + stops. Valid values: + - 6000000, 6500000, 7000000, 7500000; + - maxim,constant-uvolt : Battery Constant Voltage in uV; + Valid values: + - 4000000 - 4280000 (step by 20000); + - 4350000; + + +Optional nodes: +- max14577-muic/max77836-muic : + Node used only by extcon consumers. + Required properties: + - compatible : "maxim,max14577-muic" or "maxim,max77836-muic" + +- regulators : + Required properties: + - compatible : "maxim,max14577-regulator" + or "maxim,max77836-regulator" + + May contain a sub-node per regulator from the list below. Each + sub-node should contain the constraints and initialization information + for that regulator. See regulator.txt for a description of standard + properties for these sub-nodes. + + List of valid regulator names: + - for max14577: CHARGER, SAFEOUT. + - for max77836: CHARGER, SAFEOUT, LDO1, LDO2. + + The SAFEOUT is a fixed voltage regulator so there is no need to specify + voltages for it. + + +Example: + +#include + +max14577@25 { + compatible = "maxim,max14577"; + reg = <0x25>; + interrupt-parent = <&gpx1>; + interrupts = <5 IRQ_TYPE_NONE>; + + muic: max14577-muic { + compatible = "maxim,max14577-muic"; + }; + + regulators { + compatible = "maxim,max14577-regulator"; + + SAFEOUT { + regulator-name = "SAFEOUT"; + }; + CHARGER { + regulator-name = "CHARGER"; + regulator-min-microamp = <90000>; + regulator-max-microamp = <950000>; + regulator-boot-on; + }; + }; + + charger { + compatible = "maxim,max14577-charger"; + + maxim,constant-uvolt = <4350000>; + maxim,fast-charge-uamp = <450000>; + maxim,eoc-uamp = <50000>; + maxim,ovp-uvolt = <6500000>; + }; +}; + + +max77836@25 { + compatible = "maxim,max77836"; + reg = <0x25>; + interrupt-parent = <&gpx1>; + interrupts = <5 IRQ_TYPE_NONE>; + + muic: max77836-muic { + compatible = "maxim,max77836-muic"; + }; + + regulators { + compatible = "maxim,max77836-regulator"; + + SAFEOUT { + regulator-name = "SAFEOUT"; + }; + CHARGER { + regulator-name = "CHARGER"; + regulator-min-microamp = <90000>; + regulator-max-microamp = <950000>; + regulator-boot-on; + }; + LDO1 { + regulator-name = "LDO1"; + regulator-min-microvolt = <2700000>; + regulator-max-microvolt = <2700000>; + }; + LDO2 { + regulator-name = "LDO2"; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <3950000>; + }; + }; + + charger { + compatible = "maxim,max77836-charger"; + + maxim,constant-uvolt = <4350000>; + maxim,fast-charge-uamp = <225000>; + maxim,eoc-uamp = <7500>; + maxim,ovp-uvolt = <6500000>; + }; +}; -- cgit v1.2.2 From d6cc1f5824cbca392d099f3bb0c441efd9e54de9 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Fri, 12 Sep 2014 08:54:00 +0200 Subject: Documentation: charger: max14577: Document exported sysfs entry Document the 'fast charge timer' setting exported by max14577 driver through sysfs entry. Signed-off-by: Krzysztof Kozlowski Acked-by: Andrew Morton Signed-off-by: Lee Jones --- Documentation/ABI/testing/sysfs-class-power | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'Documentation') diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power index 78c7baca3587..ad4fb90ab23d 100644 --- a/Documentation/ABI/testing/sysfs-class-power +++ b/Documentation/ABI/testing/sysfs-class-power @@ -18,3 +18,17 @@ Description: This file is writeable and can be used to set the assumed battery 'full level'. As batteries age, this value has to be amended over time. + +What: /sys/class/power_supply/max14577-charger/device/fast_charge_timer +Date: July 2014 +KernelVersion: 3.18.0 +Contact: Krzysztof Kozlowski +Description: + This entry shows and sets the maximum time the max14577 + charger operates in fast-charge mode. When the timer expires + the device will terminate fast-charge mode (charging current + will drop to 0 A) and will trigger interrupt. + + Valid values: + - 5, 6 or 7 (hours), + - 0: disabled. -- cgit v1.2.2 From 964356938fcd3c0001a786f55b9f0a0fbe47656a Mon Sep 17 00:00:00 2001 From: Andreas Werner Date: Wed, 27 Aug 2014 19:53:06 +0200 Subject: hwmon: (menf21bmc) Introduce MEN14F021P00 BMC HWMON driver Added driver to support the 14F021P00 BMC Hardware Monitoring. The BMC is a Board Management Controller including monitoring of the board voltages. Signed-off-by: Andreas Werner Reviewed-by: Guenter Roeck Signed-off-by: Lee Jones --- Documentation/hwmon/menf21bmc | 50 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Documentation/hwmon/menf21bmc (limited to 'Documentation') diff --git a/Documentation/hwmon/menf21bmc b/Documentation/hwmon/menf21bmc new file mode 100644 index 000000000000..2a273a065c5e --- /dev/null +++ b/Documentation/hwmon/menf21bmc @@ -0,0 +1,50 @@ +Kernel driver menf21bmc_hwmon +============================= + +Supported chips: + * MEN 14F021P00 + Prefix: 'menf21bmc_hwmon' + Adresses scanned: - + +Author: Andreas Werner + +Description +----------- + +The menf21bmc is a Board Management Controller (BMC) which provides an I2C +interface to the host to access the features implemented in the BMC. + +This driver gives access to the voltage monitoring feature of the main +voltages of the board. +The voltage sensors are connected to the ADC inputs of the BMC which is +a PIC16F917 Mikrocontroller. + +Usage Notes +----------- + +This driver is part of the MFD driver named "menf21bmc" and does +not auto-detect devices. +You will have to instantiate the MFD driver explicitly. +Please see Documentation/i2c/instantiating-devices for +details. + +Sysfs entries +------------- + +The following attributes are supported. All attributes are read only +The Limits are read once by the driver. + +in0_input +3.3V input voltage +in1_input +5.0V input voltage +in2_input +12.0V input voltage +in3_input +5V Standby input voltage +in4_input VBAT (on board battery) + +in[0-4]_min Minimum voltage limit +in[0-4]_max Maximum voltage limit + +in0_label "MON_3_3V" +in1_label "MON_5V" +in2_label "MON_12V" +in3_label "5V_STANDBY" +in4_label "VBAT" -- cgit v1.2.2