forked from Minki/linux
power supply and reset changes for the v6.1 series
- new maintenance charging documentation - mt6370: new charger driver - bq25890: support input current limit - added Qualcomm PMK8350 PON support - misc. minor fixes -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE72YNB0Y/i3JqeVQT2O7X88g7+poFAmM9/loACgkQ2O7X88g7 +pqqjQ/+ICVF2Am/6mHszdAY6mAalBerOOwaHjOcpGgoqDFCnqxPlYk/N7DgDE18 EqegyVDtEAiea9qiwYmiucIoiUdWz+FHQuHdIOgNgDuBRdLYWTD9fFZhtefbSNou y2dp9xk31b/SUVMttK9EEREZpIXW+14rSO/N7gIe5gTLmeTaEjGSDUPI2Ur06pJn hg4SdD3TGlQQFO0gi0jG04vyKE8qZwdb1trLZesClU+O98WhTox4T8jrRq/iYXcb J+Hsm7ocDV9ky9sS8b19DlQAv9SbSegDiu5tEWOs7OzxeYj13XLo51wqaaRxn4rH wCZZlDQ/jK1P0BFyMXQxx7JwMiK9sb2Atga2U/7pqZBsPEC8MEjAbxkXOlWAyXty AhftuVDuEjSiEvo+y+XEr53NhFzSK8ri2l+GCfYGnPb2nS9eMJAlfT2VY/VYJTi6 D6wpoi59g2tWv600GNtaMqpmmWRxUqPjhd3xPbNCrMn5fcfUpA89ibSNmuTneb60 xVjWpLm483eOwF1VJ7GvnL6l1b6OQgHGyWZoTFnKhE/dxzj9wJDFhitOKzAa5gBD y3fbdwiNDUszjpglHHTGlbftWOsPU6PSIWxNeHr8MM7goUxKhaDwe87+ftQESTS8 8d/Ely47pDmK+ksRylHY7lOl17f+8vovJJgM+jfHvvhWQqxxqf4= =QmnL -----END PGP SIGNATURE----- Merge tag 'for-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply Pull power supply and reset updates from Sebastian Reichel: - new maintenance charging documentation - mt6370: new charger driver - bq25890: support input current limit - added Qualcomm PMK8350 PON support - misc minor fixes * tag 'for-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (22 commits) power: supply: ab8500: remove unused static local variable power: supply: mt6370: Fix return value check in mt6370_chg_probe() power: supply: ab8500: Remove unused struct ab8500_chargalg_sysfs_entry power: supply: mt6370: uses IIO interfaces, depends on IIO power: supply: max1721x: Fix spelling mistake "Gauage" -> "Gauge" power: supply: mt6370: Add MediaTek MT6370 charger driver dt-bindings: power: supply: Add MediaTek MT6370 Charger lib: add linear range index macro power: supply: bq25890: Fix enum conversion in bq25890_power_supply_set_property() power: supply: bq27xxx: fix NULL vs 0 warnings power: supply: bq27xxx: fix __be16 warnings power: supply: bq25890: Add support for setting IINLIM power: supply: bq25890: Disable PUMPX_EN on errors power: supply: Fix repeated word in comments power: supply: adp5061: show unknown capacity_level as text power: supply: adp5061: fix out-of-bounds read in adp5061_get_chg_type() power: supply: tps65217: Fix comments typo power: reset: qcom-pon: add support for qcom,pmk8350-pon compatible string dt-bindings: power: reset: qcom-pon: Add new compatible "qcom,pmk8350-pon" power: supply: cw2015: Use device managed API to simplify the code ...
This commit is contained in:
Linus Torvalds
commit
11c747e5a1
@ -15,18 +15,27 @@ description: |
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This DT node has pwrkey and resin as sub nodes.
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allOf:
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- $ref: reboot-mode.yaml#
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properties:
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compatible:
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enum:
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- qcom,pm8916-pon
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- qcom,pms405-pon
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- qcom,pm8998-pon
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- qcom,pmk8350-pon
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reg:
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maxItems: 1
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description: |
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Specifies the SPMI base address for the PON (power-on) peripheral. For
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PMICs that have the PON peripheral (GEN3) split into PON_HLOS and PON_PBS
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(e.g. PMK8350), this can hold addresses of both PON_HLOS and PON_PBS
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peripherals. In that case, the PON_PBS address needs to be specified to
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facilitate software debouncing on some PMIC.
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minItems: 1
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maxItems: 2
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reg-names:
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minItems: 1
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maxItems: 2
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pwrkey:
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type: object
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@ -46,6 +55,39 @@ required:
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unevaluatedProperties: false
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allOf:
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- $ref: reboot-mode.yaml#
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- if:
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properties:
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compatible:
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contains:
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enum:
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- qcom,pm8916-pon
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- qcom,pms405-pon
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- qcom,pm8998-pon
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then:
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properties:
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reg:
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maxItems: 1
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reg-names:
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items:
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- const: pon
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- if:
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properties:
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compatible:
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contains:
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const: qcom,pmk8350-pon
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then:
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properties:
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reg:
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minItems: 1
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maxItems: 2
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reg-names:
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minItems: 1
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items:
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- const: hlos
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- const: pbs
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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@ -0,0 +1,96 @@
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/power/supply/mediatek,mt6370-charger.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: MediaTek MT6370 Battery Charger
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maintainers:
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- ChiaEn Wu <chiaen_wu@richtek.com>
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description: |
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This module is part of the MT6370 MFD device.
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Provides Battery Charger, Boost for OTG devices and BC1.2 detection.
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properties:
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compatible:
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const: mediatek,mt6370-charger
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interrupts:
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description: |
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Specify what irqs are needed to be handled by MT6370 Charger driver.
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We need to use the IRQ "MT6370_IRQ_OVPCTRL_UVP_D" to know when USB
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is plugged in, and then the driver will enable BC1.2 detection.
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After the hardware of MT6370 completes the BC1.2 detection,
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IRQ "MT6370_IRQ_ATTACH" will be triggered, and the driver will know
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the result of BC1.2 detection.
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When the IRQ "MT6370_IRQ_CHG_MIVR" is triggered, it means that the
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hardware enters the "Minimum Input Voltage Regulation loop" and
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a workaround needs to be applied at this time.
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In summary, "MT6370_IRQ_OVPCTRL_UVP_D", "MT6370_IRQ_ATTACH" and
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"MT6370_IRQ_CHG_MIVR" are required in this charger driver.
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items:
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- description: irq of "USB is plugged in"
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- description: irq of "BC1.2 is done"
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- description: irq of "Minimum Input Voltage Regulation loop is active"
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interrupt-names:
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items:
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- const: uvp_d_evt
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- const: attach_i
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- const: mivr
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io-channels:
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description: |
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Use ADC channel to read VBUS, IBUS, IBAT, etc., info.
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minItems: 1
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items:
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- description: |
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VBUS voltage with lower accuracy (+-75mV) but higher measure
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range (1~22V)
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- description: |
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VBUS voltage with higher accuracy (+-30mV) but lower measure
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range (1~9.76V)
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- description: the main system input voltage
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- description: battery voltage
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- description: battery temperature-sense input voltage
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- description: IBUS current (required)
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- description: battery current
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- description: |
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regulated output voltage to supply for the PWM low-side gate driver
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and the bootstrap capacitor
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- description: IC junction temperature
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io-channel-names:
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minItems: 1
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items:
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- const: vbusdiv5
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- const: vbusdiv2
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- const: vsys
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- const: vbat
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- const: ts_bat
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- const: ibus
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- const: ibat
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- const: chg_vddp
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- const: temp_jc
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usb-otg-vbus-regulator:
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type: object
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description: OTG boost regulator.
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unevaluatedProperties: false
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$ref: /schemas/regulator/regulator.yaml#
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properties:
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enable-gpios:
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maxItems: 1
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required:
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- compatible
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- interrupts
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- interrupt-names
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- io-channels
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additionalProperties: false
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...
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@ -82,6 +82,7 @@ static const struct of_device_id pm8916_pon_id_table[] = {
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{ .compatible = "qcom,pm8916-pon", .data = (void *)GEN1_REASON_SHIFT },
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{ .compatible = "qcom,pms405-pon", .data = (void *)GEN1_REASON_SHIFT },
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{ .compatible = "qcom,pm8998-pon", .data = (void *)GEN2_REASON_SHIFT },
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{ .compatible = "qcom,pmk8350-pon", .data = (void *)GEN2_REASON_SHIFT },
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{ }
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};
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MODULE_DEVICE_TABLE(of, pm8916_pon_id_table);
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@ -619,6 +619,21 @@ config CHARGER_MT6360
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Average Input Current Regulation, Battery Temperature Sensing,
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Over-Temperature Protection, DPDM Detection for BC1.2.
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config CHARGER_MT6370
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tristate "MediaTek MT6370 Charger Driver"
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depends on MFD_MT6370
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depends on REGULATOR
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depends on IIO
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select LINEAR_RANGES
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help
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Say Y here to enable MT6370 Charger Part.
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The device supports High-Accuracy Voltage/Current Regulation,
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Average Input Current Regulation, Battery Temperature Sensing,
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Over-Temperature Protection, DPDM Detection for BC1.2.
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This driver can also be built as a module. If so, the module
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will be called "mt6370-charger".
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config CHARGER_QCOM_SMBB
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tristate "Qualcomm Switch-Mode Battery Charger and Boost"
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depends on MFD_SPMI_PMIC || COMPILE_TEST
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@ -82,6 +82,7 @@ obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
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obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
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obj-$(CONFIG_CHARGER_MP2629) += mp2629_charger.o
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obj-$(CONFIG_CHARGER_MT6360) += mt6360_charger.o
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obj-$(CONFIG_CHARGER_MT6370) += mt6370-charger.o
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obj-$(CONFIG_CHARGER_QCOM_SMBB) += qcom_smbb.o
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obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
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obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
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@ -252,12 +252,6 @@ static enum power_supply_property ab8500_chargalg_props[] = {
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POWER_SUPPLY_PROP_HEALTH,
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};
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struct ab8500_chargalg_sysfs_entry {
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struct attribute attr;
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ssize_t (*show)(struct ab8500_chargalg *di, char *buf);
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ssize_t (*store)(struct ab8500_chargalg *di, const char *buf, size_t length);
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};
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/**
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* ab8500_chargalg_safety_timer_expired() - Expiration of the safety timer
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* @timer: pointer to the hrtimer structure
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@ -490,8 +484,6 @@ static int ab8500_chargalg_kick_watchdog(struct ab8500_chargalg *di)
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static int ab8500_chargalg_ac_en(struct ab8500_chargalg *di, int enable,
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int vset_uv, int iset_ua)
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{
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static int ab8500_chargalg_ex_ac_enable_toggle;
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if (!di->ac_chg || !di->ac_chg->ops.enable)
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return -ENXIO;
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@ -427,11 +427,11 @@ static int adp5061_get_chg_type(struct adp5061_state *st,
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if (ret < 0)
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return ret;
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chg_type = adp5061_chg_type[ADP5061_CHG_STATUS_1_CHG_STATUS(status1)];
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if (chg_type > ADP5061_CHG_FAST_CV)
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chg_type = ADP5061_CHG_STATUS_1_CHG_STATUS(status1);
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if (chg_type >= ARRAY_SIZE(adp5061_chg_type))
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val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
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else
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val->intval = chg_type;
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val->intval = adp5061_chg_type[chg_type];
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return ret;
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}
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@ -493,6 +493,9 @@ static int adp5061_get_battery_status(struct adp5061_state *st,
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case 0x4: /* VBAT_SNS > VWEAK */
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
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break;
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default:
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
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break;
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}
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return ret;
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@ -613,6 +613,33 @@ static int bq25890_power_supply_get_property(struct power_supply *psy,
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return 0;
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}
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static int bq25890_power_supply_set_property(struct power_supply *psy,
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enum power_supply_property psp,
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const union power_supply_propval *val)
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{
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struct bq25890_device *bq = power_supply_get_drvdata(psy);
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u8 lval;
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switch (psp) {
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
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lval = bq25890_find_idx(val->intval, TBL_IINLIM);
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return bq25890_field_write(bq, F_IINLIM, lval);
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default:
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return -EINVAL;
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}
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}
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static int bq25890_power_supply_property_is_writeable(struct power_supply *psy,
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enum power_supply_property psp)
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{
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switch (psp) {
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
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return true;
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default:
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return false;
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}
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}
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/* On the BQ25892 try to get charger-type info from our supplier */
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static void bq25890_charger_external_power_changed(struct power_supply *psy)
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{
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@ -874,6 +901,8 @@ static const struct power_supply_desc bq25890_power_supply_desc = {
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.properties = bq25890_power_supply_props,
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.num_properties = ARRAY_SIZE(bq25890_power_supply_props),
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.get_property = bq25890_power_supply_get_property,
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.set_property = bq25890_power_supply_set_property,
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.property_is_writeable = bq25890_power_supply_property_is_writeable,
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.external_power_changed = bq25890_charger_external_power_changed,
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};
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@ -946,6 +975,7 @@ static void bq25890_pump_express_work(struct work_struct *data)
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return;
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error_print:
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bq25890_field_write(bq, F_PUMPX_EN, 0);
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dev_err(bq->dev, "Failed to request hi-voltage charging\n");
|
||||
}
|
||||
|
||||
|
||||
@ -868,11 +868,11 @@ enum bq27xxx_dm_reg_id {
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BQ27XXX_DM_TERMINATE_VOLTAGE,
|
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};
|
||||
|
||||
#define bq27000_dm_regs 0
|
||||
#define bq27010_dm_regs 0
|
||||
#define bq2750x_dm_regs 0
|
||||
#define bq2751x_dm_regs 0
|
||||
#define bq2752x_dm_regs 0
|
||||
#define bq27000_dm_regs NULL
|
||||
#define bq27010_dm_regs NULL
|
||||
#define bq2750x_dm_regs NULL
|
||||
#define bq2751x_dm_regs NULL
|
||||
#define bq2752x_dm_regs NULL
|
||||
|
||||
#if 0 /* not yet tested */
|
||||
static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
|
||||
@ -881,24 +881,24 @@ static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
|
||||
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 },
|
||||
};
|
||||
#else
|
||||
#define bq27500_dm_regs 0
|
||||
#define bq27500_dm_regs NULL
|
||||
#endif
|
||||
|
||||
/* todo create data memory definitions from datasheets and test on chips */
|
||||
#define bq27510g1_dm_regs 0
|
||||
#define bq27510g2_dm_regs 0
|
||||
#define bq27510g3_dm_regs 0
|
||||
#define bq27520g1_dm_regs 0
|
||||
#define bq27520g2_dm_regs 0
|
||||
#define bq27520g3_dm_regs 0
|
||||
#define bq27520g4_dm_regs 0
|
||||
#define bq27521_dm_regs 0
|
||||
#define bq27530_dm_regs 0
|
||||
#define bq27531_dm_regs 0
|
||||
#define bq27541_dm_regs 0
|
||||
#define bq27542_dm_regs 0
|
||||
#define bq27546_dm_regs 0
|
||||
#define bq27742_dm_regs 0
|
||||
#define bq27510g1_dm_regs NULL
|
||||
#define bq27510g2_dm_regs NULL
|
||||
#define bq27510g3_dm_regs NULL
|
||||
#define bq27520g1_dm_regs NULL
|
||||
#define bq27520g2_dm_regs NULL
|
||||
#define bq27520g3_dm_regs NULL
|
||||
#define bq27520g4_dm_regs NULL
|
||||
#define bq27521_dm_regs NULL
|
||||
#define bq27530_dm_regs NULL
|
||||
#define bq27531_dm_regs NULL
|
||||
#define bq27541_dm_regs NULL
|
||||
#define bq27542_dm_regs NULL
|
||||
#define bq27546_dm_regs NULL
|
||||
#define bq27742_dm_regs NULL
|
||||
|
||||
#if 0 /* not yet tested */
|
||||
static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
|
||||
@ -907,7 +907,7 @@ static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
|
||||
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800, 3700 },
|
||||
};
|
||||
#else
|
||||
#define bq27545_dm_regs 0
|
||||
#define bq27545_dm_regs NULL
|
||||
#endif
|
||||
|
||||
static struct bq27xxx_dm_reg bq27411_dm_regs[] = {
|
||||
@ -937,7 +937,7 @@ static struct bq27xxx_dm_reg bq27426_dm_regs[] = {
|
||||
#if 0 /* not yet tested */
|
||||
#define bq27441_dm_regs bq27421_dm_regs
|
||||
#else
|
||||
#define bq27441_dm_regs 0
|
||||
#define bq27441_dm_regs NULL
|
||||
#endif
|
||||
|
||||
#if 0 /* not yet tested */
|
||||
@ -947,13 +947,13 @@ static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
|
||||
[BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500, 3700 },
|
||||
};
|
||||
#else
|
||||
#define bq27621_dm_regs 0
|
||||
#define bq27621_dm_regs NULL
|
||||
#endif
|
||||
|
||||
#define bq27z561_dm_regs 0
|
||||
#define bq28z610_dm_regs 0
|
||||
#define bq34z100_dm_regs 0
|
||||
#define bq78z100_dm_regs 0
|
||||
#define bq27z561_dm_regs NULL
|
||||
#define bq28z610_dm_regs NULL
|
||||
#define bq34z100_dm_regs NULL
|
||||
#define bq78z100_dm_regs NULL
|
||||
|
||||
#define BQ27XXX_O_ZERO BIT(0)
|
||||
#define BQ27XXX_O_OTDC BIT(1) /* has OTC/OTD overtemperature flags */
|
||||
@ -1044,12 +1044,12 @@ struct bq27xxx_dm_buf {
|
||||
.block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
|
||||
}
|
||||
|
||||
static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
|
||||
static inline __be16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
|
||||
struct bq27xxx_dm_reg *reg)
|
||||
{
|
||||
if (buf->class == reg->subclass_id &&
|
||||
buf->block == reg->offset / BQ27XXX_DM_SZ)
|
||||
return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
|
||||
return (__be16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
|
||||
|
||||
return NULL;
|
||||
}
|
||||
@ -1275,7 +1275,7 @@ static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
|
||||
{
|
||||
struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
|
||||
const char *str = bq27xxx_dm_reg_name[reg_id];
|
||||
u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
|
||||
__be16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
|
||||
|
||||
if (prev == NULL) {
|
||||
dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
|
||||
|
||||
@ -5,7 +5,7 @@
|
||||
* Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
|
||||
*
|
||||
* Rewritten for Linux power framework with some parts based on
|
||||
* on earlier driver found in the Motorola Linux kernel:
|
||||
* earlier driver found in the Motorola Linux kernel:
|
||||
*
|
||||
* Copyright (C) 2009-2010 Motorola, Inc.
|
||||
*/
|
||||
|
||||
@ -21,6 +21,7 @@
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/time.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <linux/devm-helpers.h>
|
||||
|
||||
#define CW2015_SIZE_BATINFO 64
|
||||
|
||||
@ -698,7 +699,8 @@ static int cw_bat_probe(struct i2c_client *client)
|
||||
}
|
||||
|
||||
cw_bat->battery_workqueue = create_singlethread_workqueue("rk_battery");
|
||||
INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work);
|
||||
devm_delayed_work_autocancel(&client->dev,
|
||||
&cw_bat->battery_delay_work, cw_bat_work);
|
||||
queue_delayed_work(cw_bat->battery_workqueue,
|
||||
&cw_bat->battery_delay_work, msecs_to_jiffies(10));
|
||||
return 0;
|
||||
@ -725,14 +727,6 @@ static int __maybe_unused cw_bat_resume(struct device *dev)
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(cw_bat_pm_ops, cw_bat_suspend, cw_bat_resume);
|
||||
|
||||
static void cw_bat_remove(struct i2c_client *client)
|
||||
{
|
||||
struct cw_battery *cw_bat = i2c_get_clientdata(client);
|
||||
|
||||
cancel_delayed_work_sync(&cw_bat->battery_delay_work);
|
||||
power_supply_put_battery_info(cw_bat->rk_bat, cw_bat->battery);
|
||||
}
|
||||
|
||||
static const struct i2c_device_id cw_bat_id_table[] = {
|
||||
{ "cw2015", 0 },
|
||||
{ }
|
||||
@ -751,7 +745,6 @@ static struct i2c_driver cw_bat_driver = {
|
||||
.pm = &cw_bat_pm_ops,
|
||||
},
|
||||
.probe_new = cw_bat_probe,
|
||||
.remove = cw_bat_remove,
|
||||
.id_table = cw_bat_id_table,
|
||||
};
|
||||
|
||||
|
||||
@ -444,5 +444,5 @@ module_w1_family(w1_max1721x_family);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Alex A. Mihaylov <minimumlaw@rambler.ru>");
|
||||
MODULE_DESCRIPTION("Maxim MAX17211/MAX17215 Fuel Gauage IC driver");
|
||||
MODULE_DESCRIPTION("Maxim MAX17211/MAX17215 Fuel Gauge IC driver");
|
||||
MODULE_ALIAS("w1-family-" __stringify(W1_MAX1721X_FAMILY_ID));
|
||||
|
||||
961
drivers/power/supply/mt6370-charger.c
Normal file
961
drivers/power/supply/mt6370-charger.c
Normal file
@ -0,0 +1,961 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Copyright (C) 2022 Richtek Technology Corp.
|
||||
*
|
||||
* Author: ChiaEn Wu <chiaen_wu@richtek.com>
|
||||
*/
|
||||
|
||||
#include <linux/bitfield.h>
|
||||
#include <linux/bits.h>
|
||||
#include <linux/devm-helpers.h>
|
||||
#include <linux/gpio/consumer.h>
|
||||
#include <linux/iio/consumer.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/linear_range.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/power_supply.h>
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/regulator/driver.h>
|
||||
#include <linux/workqueue.h>
|
||||
|
||||
#define MT6370_REG_CHG_CTRL1 0x111
|
||||
#define MT6370_REG_CHG_CTRL2 0x112
|
||||
#define MT6370_REG_CHG_CTRL3 0x113
|
||||
#define MT6370_REG_CHG_CTRL4 0x114
|
||||
#define MT6370_REG_CHG_CTRL5 0x115
|
||||
#define MT6370_REG_CHG_CTRL6 0x116
|
||||
#define MT6370_REG_CHG_CTRL7 0x117
|
||||
#define MT6370_REG_CHG_CTRL8 0x118
|
||||
#define MT6370_REG_CHG_CTRL9 0x119
|
||||
#define MT6370_REG_CHG_CTRL10 0x11A
|
||||
#define MT6370_REG_DEVICE_TYPE 0x122
|
||||
#define MT6370_REG_USB_STATUS1 0x127
|
||||
#define MT6370_REG_CHG_STAT 0x14A
|
||||
#define MT6370_REG_FLED_EN 0x17E
|
||||
#define MT6370_REG_CHG_STAT1 0X1D0
|
||||
#define MT6370_REG_OVPCTRL_STAT 0x1D8
|
||||
|
||||
#define MT6370_VOBST_MASK GENMASK(7, 2)
|
||||
#define MT6370_OTG_PIN_EN_MASK BIT(1)
|
||||
#define MT6370_OPA_MODE_MASK BIT(0)
|
||||
#define MT6370_OTG_OC_MASK GENMASK(2, 0)
|
||||
|
||||
#define MT6370_MIVR_IBUS_TH_100_mA 100000
|
||||
#define MT6370_ADC_CHAN_IBUS 5
|
||||
#define MT6370_ADC_CHAN_MAX 9
|
||||
|
||||
enum mt6370_chg_reg_field {
|
||||
/* MT6370_REG_CHG_CTRL2 */
|
||||
F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
|
||||
/* MT6370_REG_CHG_CTRL3 */
|
||||
F_IAICR, F_AICR_EN, F_ILIM_EN,
|
||||
/* MT6370_REG_CHG_CTRL4 */
|
||||
F_VOREG,
|
||||
/* MT6370_REG_CHG_CTRL6 */
|
||||
F_VMIVR,
|
||||
/* MT6370_REG_CHG_CTRL7 */
|
||||
F_ICHG,
|
||||
/* MT6370_REG_CHG_CTRL8 */
|
||||
F_IPREC,
|
||||
/* MT6370_REG_CHG_CTRL9 */
|
||||
F_IEOC,
|
||||
/* MT6370_REG_DEVICE_TYPE */
|
||||
F_USBCHGEN,
|
||||
/* MT6370_REG_USB_STATUS1 */
|
||||
F_USB_STAT, F_CHGDET,
|
||||
/* MT6370_REG_CHG_STAT */
|
||||
F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL,
|
||||
/* MT6370_REG_FLED_EN */
|
||||
F_FL_STROBE,
|
||||
/* MT6370_REG_CHG_STAT1 */
|
||||
F_CHG_MIVR_STAT,
|
||||
/* MT6370_REG_OVPCTRL_STAT */
|
||||
F_UVP_D_STAT,
|
||||
F_MAX
|
||||
};
|
||||
|
||||
enum mt6370_irq {
|
||||
MT6370_IRQ_ATTACH_I = 0,
|
||||
MT6370_IRQ_UVP_D_EVT,
|
||||
MT6370_IRQ_MIVR,
|
||||
MT6370_IRQ_MAX
|
||||
};
|
||||
|
||||
struct mt6370_priv {
|
||||
struct device *dev;
|
||||
struct iio_channel *iio_adcs;
|
||||
struct mutex attach_lock;
|
||||
struct power_supply *psy;
|
||||
struct regmap *regmap;
|
||||
struct regmap_field *rmap_fields[F_MAX];
|
||||
struct regulator_dev *rdev;
|
||||
struct workqueue_struct *wq;
|
||||
struct work_struct bc12_work;
|
||||
struct delayed_work mivr_dwork;
|
||||
unsigned int irq_nums[MT6370_IRQ_MAX];
|
||||
int attach;
|
||||
int psy_usb_type;
|
||||
bool pwr_rdy;
|
||||
};
|
||||
|
||||
enum mt6370_usb_status {
|
||||
MT6370_USB_STAT_NO_VBUS = 0,
|
||||
MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING,
|
||||
MT6370_USB_STAT_SDP,
|
||||
MT6370_USB_STAT_SDP_NSTD,
|
||||
MT6370_USB_STAT_DCP,
|
||||
MT6370_USB_STAT_CDP,
|
||||
MT6370_USB_STAT_MAX
|
||||
};
|
||||
|
||||
struct mt6370_chg_field {
|
||||
const char *name;
|
||||
const struct linear_range *range;
|
||||
struct reg_field field;
|
||||
};
|
||||
|
||||
enum {
|
||||
MT6370_RANGE_F_IAICR = 0,
|
||||
MT6370_RANGE_F_VOREG,
|
||||
MT6370_RANGE_F_VMIVR,
|
||||
MT6370_RANGE_F_ICHG,
|
||||
MT6370_RANGE_F_IPREC,
|
||||
MT6370_RANGE_F_IEOC,
|
||||
MT6370_RANGE_F_MAX
|
||||
};
|
||||
|
||||
static const struct linear_range mt6370_chg_ranges[MT6370_RANGE_F_MAX] = {
|
||||
LINEAR_RANGE_IDX(MT6370_RANGE_F_IAICR, 100000, 0x0, 0x3F, 50000),
|
||||
LINEAR_RANGE_IDX(MT6370_RANGE_F_VOREG, 3900000, 0x0, 0x51, 10000),
|
||||
LINEAR_RANGE_IDX(MT6370_RANGE_F_VMIVR, 3900000, 0x0, 0x5F, 100000),
|
||||
LINEAR_RANGE_IDX(MT6370_RANGE_F_ICHG, 900000, 0x08, 0x31, 100000),
|
||||
LINEAR_RANGE_IDX(MT6370_RANGE_F_IPREC, 100000, 0x0, 0x0F, 50000),
|
||||
LINEAR_RANGE_IDX(MT6370_RANGE_F_IEOC, 100000, 0x0, 0x0F, 50000),
|
||||
};
|
||||
|
||||
#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb) \
|
||||
[_fd] = { \
|
||||
.name = #_fd, \
|
||||
.range = NULL, \
|
||||
.field = REG_FIELD(_reg, _lsb, _msb), \
|
||||
}
|
||||
|
||||
#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb) \
|
||||
[_fd] = { \
|
||||
.name = #_fd, \
|
||||
.range = &mt6370_chg_ranges[MT6370_RANGE_##_fd], \
|
||||
.field = REG_FIELD(_reg, _lsb, _msb), \
|
||||
}
|
||||
|
||||
static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
|
||||
MT6370_CHG_FIELD(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3),
|
||||
MT6370_CHG_FIELD(F_CFO_EN, MT6370_REG_CHG_CTRL2, 1, 1),
|
||||
MT6370_CHG_FIELD(F_CHG_EN, MT6370_REG_CHG_CTRL2, 0, 0),
|
||||
MT6370_CHG_FIELD_RANGE(F_IAICR, MT6370_REG_CHG_CTRL3, 2, 7),
|
||||
MT6370_CHG_FIELD(F_AICR_EN, MT6370_REG_CHG_CTRL3, 1, 1),
|
||||
MT6370_CHG_FIELD(F_ILIM_EN, MT6370_REG_CHG_CTRL3, 0, 0),
|
||||
MT6370_CHG_FIELD_RANGE(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
|
||||
MT6370_CHG_FIELD_RANGE(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
|
||||
MT6370_CHG_FIELD_RANGE(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
|
||||
MT6370_CHG_FIELD_RANGE(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
|
||||
MT6370_CHG_FIELD_RANGE(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
|
||||
MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
|
||||
MT6370_CHG_FIELD(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6),
|
||||
MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
|
||||
MT6370_CHG_FIELD(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7),
|
||||
MT6370_CHG_FIELD(F_BOOST_STAT, MT6370_REG_CHG_STAT, 3, 3),
|
||||
MT6370_CHG_FIELD(F_VBAT_LVL, MT6370_REG_CHG_STAT, 5, 5),
|
||||
MT6370_CHG_FIELD(F_FL_STROBE, MT6370_REG_FLED_EN, 2, 2),
|
||||
MT6370_CHG_FIELD(F_CHG_MIVR_STAT, MT6370_REG_CHG_STAT1, 6, 6),
|
||||
MT6370_CHG_FIELD(F_UVP_D_STAT, MT6370_REG_OVPCTRL_STAT, 4, 4),
|
||||
};
|
||||
|
||||
static inline int mt6370_chg_field_get(struct mt6370_priv *priv,
|
||||
enum mt6370_chg_reg_field fd,
|
||||
unsigned int *val)
|
||||
{
|
||||
int ret;
|
||||
unsigned int reg_val;
|
||||
|
||||
ret = regmap_field_read(priv->rmap_fields[fd], ®_val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (mt6370_chg_fields[fd].range)
|
||||
return linear_range_get_value(mt6370_chg_fields[fd].range,
|
||||
reg_val, val);
|
||||
|
||||
*val = reg_val;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
|
||||
enum mt6370_chg_reg_field fd,
|
||||
unsigned int val)
|
||||
{
|
||||
int ret;
|
||||
bool f;
|
||||
const struct linear_range *r;
|
||||
|
||||
if (mt6370_chg_fields[fd].range) {
|
||||
r = mt6370_chg_fields[fd].range;
|
||||
|
||||
if (fd == F_VMIVR) {
|
||||
ret = linear_range_get_selector_high(r, val, &val, &f);
|
||||
if (ret)
|
||||
val = r->max_sel;
|
||||
} else {
|
||||
linear_range_get_selector_within(r, val, &val);
|
||||
}
|
||||
}
|
||||
|
||||
return regmap_field_write(priv->rmap_fields[fd], val);
|
||||
}
|
||||
|
||||
enum {
|
||||
MT6370_CHG_STAT_READY = 0,
|
||||
MT6370_CHG_STAT_CHARGE_IN_PROGRESS,
|
||||
MT6370_CHG_STAT_DONE,
|
||||
MT6370_CHG_STAT_FAULT,
|
||||
MT6370_CHG_STAT_MAX
|
||||
};
|
||||
|
||||
enum {
|
||||
MT6370_ATTACH_STAT_DETACH = 0,
|
||||
MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12,
|
||||
MT6370_ATTACH_STAT_ATTACH_BC12_DONE,
|
||||
MT6370_ATTACH_STAT_ATTACH_MAX
|
||||
};
|
||||
|
||||
static int mt6370_chg_otg_of_parse_cb(struct device_node *of,
|
||||
const struct regulator_desc *rdesc,
|
||||
struct regulator_config *rcfg)
|
||||
{
|
||||
struct mt6370_priv *priv = rcfg->driver_data;
|
||||
|
||||
rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
|
||||
"enable", 0, GPIOD_OUT_LOW |
|
||||
GPIOD_FLAGS_BIT_NONEXCLUSIVE,
|
||||
rdesc->name);
|
||||
if (IS_ERR(rcfg->ena_gpiod)) {
|
||||
rcfg->ena_gpiod = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
return regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
|
||||
MT6370_OTG_PIN_EN_MASK,
|
||||
MT6370_OTG_PIN_EN_MASK);
|
||||
}
|
||||
|
||||
static void mt6370_chg_bc12_work_func(struct work_struct *work)
|
||||
{
|
||||
struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
|
||||
bc12_work);
|
||||
int ret;
|
||||
bool rpt_psy = false;
|
||||
unsigned int attach, usb_stat;
|
||||
|
||||
mutex_lock(&priv->attach_lock);
|
||||
attach = priv->attach;
|
||||
|
||||
switch (attach) {
|
||||
case MT6370_ATTACH_STAT_DETACH:
|
||||
usb_stat = 0;
|
||||
break;
|
||||
case MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12:
|
||||
ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
|
||||
if (ret)
|
||||
dev_err(priv->dev, "Failed to enable USB CHG EN\n");
|
||||
goto bc12_work_func_out;
|
||||
case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
|
||||
ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to get USB status\n");
|
||||
goto bc12_work_func_out;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
dev_err(priv->dev, "Invalid attach state\n");
|
||||
goto bc12_work_func_out;
|
||||
}
|
||||
|
||||
rpt_psy = true;
|
||||
|
||||
switch (usb_stat) {
|
||||
case MT6370_USB_STAT_SDP:
|
||||
case MT6370_USB_STAT_SDP_NSTD:
|
||||
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
|
||||
break;
|
||||
case MT6370_USB_STAT_DCP:
|
||||
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
|
||||
break;
|
||||
case MT6370_USB_STAT_CDP:
|
||||
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
|
||||
break;
|
||||
case MT6370_USB_STAT_NO_VBUS:
|
||||
case MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING:
|
||||
default:
|
||||
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
|
||||
break;
|
||||
}
|
||||
|
||||
bc12_work_func_out:
|
||||
mutex_unlock(&priv->attach_lock);
|
||||
|
||||
if (rpt_psy)
|
||||
power_supply_changed(priv->psy);
|
||||
}
|
||||
|
||||
static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
|
||||
{
|
||||
int ret;
|
||||
unsigned int fl_strobe;
|
||||
|
||||
/* check if flash led in strobe mode */
|
||||
ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (fl_strobe) {
|
||||
dev_err(priv->dev, "Flash led is still in strobe mode\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* cfo off */
|
||||
ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to disable CFO_EN\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* cfo on */
|
||||
ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
|
||||
if (ret)
|
||||
dev_err(priv->dev, "Failed to enable CFO_EN\n");
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
|
||||
int *val)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (chan >= MT6370_ADC_CHAN_MAX)
|
||||
return -EINVAL;
|
||||
|
||||
ret = iio_read_channel_processed(&priv->iio_adcs[chan], val);
|
||||
if (ret)
|
||||
dev_err(priv->dev, "Failed to read ADC\n");
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void mt6370_chg_mivr_dwork_func(struct work_struct *work)
|
||||
{
|
||||
struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
|
||||
mivr_dwork.work);
|
||||
int ret;
|
||||
unsigned int mivr_stat, ibus;
|
||||
|
||||
ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to get mivr state\n");
|
||||
goto mivr_handler_out;
|
||||
}
|
||||
|
||||
if (!mivr_stat)
|
||||
goto mivr_handler_out;
|
||||
|
||||
ret = mt6370_chg_read_adc_chan(priv, MT6370_ADC_CHAN_IBUS, &ibus);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to get ibus\n");
|
||||
goto mivr_handler_out;
|
||||
}
|
||||
|
||||
if (ibus < MT6370_MIVR_IBUS_TH_100_mA) {
|
||||
ret = mt6370_chg_toggle_cfo(priv);
|
||||
if (ret)
|
||||
dev_err(priv->dev, "Failed to toggle cfo\n");
|
||||
}
|
||||
|
||||
mivr_handler_out:
|
||||
enable_irq(priv->irq_nums[MT6370_IRQ_MIVR]);
|
||||
pm_relax(priv->dev);
|
||||
}
|
||||
|
||||
static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
|
||||
{
|
||||
int ret;
|
||||
unsigned int opposite_pwr_rdy, otg_en;
|
||||
union power_supply_propval val;
|
||||
|
||||
/* Check in OTG mode or not */
|
||||
ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to get OTG state\n");
|
||||
return;
|
||||
}
|
||||
|
||||
if (otg_en)
|
||||
return;
|
||||
|
||||
ret = mt6370_chg_field_get(priv, F_UVP_D_STAT, &opposite_pwr_rdy);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to get opposite power ready state\n");
|
||||
return;
|
||||
}
|
||||
|
||||
val.intval = opposite_pwr_rdy ?
|
||||
MT6370_ATTACH_STAT_DETACH :
|
||||
MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12;
|
||||
|
||||
ret = power_supply_set_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
|
||||
&val);
|
||||
if (ret)
|
||||
dev_err(priv->dev, "Failed to start attach/detach flow\n");
|
||||
}
|
||||
|
||||
static int mt6370_chg_get_online(struct mt6370_priv *priv,
|
||||
union power_supply_propval *val)
|
||||
{
|
||||
mutex_lock(&priv->attach_lock);
|
||||
val->intval = !!priv->attach;
|
||||
mutex_unlock(&priv->attach_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt6370_chg_get_status(struct mt6370_priv *priv,
|
||||
union power_supply_propval *val)
|
||||
{
|
||||
int ret;
|
||||
unsigned int chg_stat;
|
||||
union power_supply_propval online;
|
||||
|
||||
ret = power_supply_get_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
|
||||
&online);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to get online status\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (!online.intval) {
|
||||
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
||||
return 0;
|
||||
}
|
||||
|
||||
ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
switch (chg_stat) {
|
||||
case MT6370_CHG_STAT_READY:
|
||||
case MT6370_CHG_STAT_FAULT:
|
||||
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
||||
return ret;
|
||||
case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
|
||||
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
||||
return ret;
|
||||
case MT6370_CHG_STAT_DONE:
|
||||
val->intval = POWER_SUPPLY_STATUS_FULL;
|
||||
return ret;
|
||||
default:
|
||||
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
|
||||
union power_supply_propval *val)
|
||||
{
|
||||
int type, ret;
|
||||
unsigned int chg_stat, vbat_lvl;
|
||||
|
||||
ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
switch (chg_stat) {
|
||||
case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
|
||||
if (vbat_lvl)
|
||||
type = POWER_SUPPLY_CHARGE_TYPE_FAST;
|
||||
else
|
||||
type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
|
||||
break;
|
||||
case MT6370_CHG_STAT_READY:
|
||||
case MT6370_CHG_STAT_DONE:
|
||||
case MT6370_CHG_STAT_FAULT:
|
||||
default:
|
||||
type = POWER_SUPPLY_CHARGE_TYPE_NONE;
|
||||
break;
|
||||
}
|
||||
|
||||
val->intval = type;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt6370_chg_set_online(struct mt6370_priv *priv,
|
||||
const union power_supply_propval *val)
|
||||
{
|
||||
bool pwr_rdy = !!val->intval;
|
||||
|
||||
mutex_lock(&priv->attach_lock);
|
||||
if (pwr_rdy == !!priv->attach) {
|
||||
dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
|
||||
mutex_unlock(&priv->attach_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
priv->attach = pwr_rdy;
|
||||
mutex_unlock(&priv->attach_lock);
|
||||
|
||||
if (!queue_work(priv->wq, &priv->bc12_work))
|
||||
dev_err(priv->dev, "bc12 work has already queued\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt6370_chg_get_property(struct power_supply *psy,
|
||||
enum power_supply_property psp,
|
||||
union power_supply_propval *val)
|
||||
{
|
||||
struct mt6370_priv *priv = power_supply_get_drvdata(psy);
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_ONLINE:
|
||||
return mt6370_chg_get_online(priv, val);
|
||||
case POWER_SUPPLY_PROP_STATUS:
|
||||
return mt6370_chg_get_status(priv, val);
|
||||
case POWER_SUPPLY_PROP_CHARGE_TYPE:
|
||||
return mt6370_chg_get_charge_type(priv, val);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
||||
return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
|
||||
val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_ICHG]);
|
||||
return 0;
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
||||
return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
|
||||
val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_VOREG]);
|
||||
return 0;
|
||||
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
||||
return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
|
||||
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
|
||||
return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
|
||||
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
|
||||
return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
|
||||
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
|
||||
return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
|
||||
case POWER_SUPPLY_PROP_USB_TYPE:
|
||||
val->intval = priv->psy_usb_type;
|
||||
return 0;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static int mt6370_chg_set_property(struct power_supply *psy,
|
||||
enum power_supply_property psp,
|
||||
const union power_supply_propval *val)
|
||||
{
|
||||
struct mt6370_priv *priv = power_supply_get_drvdata(psy);
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_ONLINE:
|
||||
return mt6370_chg_set_online(priv, val);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
||||
return mt6370_chg_field_set(priv, F_ICHG, val->intval);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
||||
return mt6370_chg_field_set(priv, F_VOREG, val->intval);
|
||||
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
||||
return mt6370_chg_field_set(priv, F_IAICR, val->intval);
|
||||
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
|
||||
return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
|
||||
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
|
||||
return mt6370_chg_field_set(priv, F_IPREC, val->intval);
|
||||
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
|
||||
return mt6370_chg_field_set(priv, F_IEOC, val->intval);
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static int mt6370_chg_property_is_writeable(struct power_supply *psy,
|
||||
enum power_supply_property psp)
|
||||
{
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_ONLINE:
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
||||
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
||||
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
|
||||
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
|
||||
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
|
||||
return 1;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
static enum power_supply_property mt6370_chg_properties[] = {
|
||||
POWER_SUPPLY_PROP_ONLINE,
|
||||
POWER_SUPPLY_PROP_STATUS,
|
||||
POWER_SUPPLY_PROP_CHARGE_TYPE,
|
||||
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
|
||||
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
|
||||
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
|
||||
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
|
||||
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
|
||||
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
|
||||
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
|
||||
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
|
||||
POWER_SUPPLY_PROP_USB_TYPE,
|
||||
};
|
||||
|
||||
static enum power_supply_usb_type mt6370_chg_usb_types[] = {
|
||||
POWER_SUPPLY_USB_TYPE_UNKNOWN,
|
||||
POWER_SUPPLY_USB_TYPE_SDP,
|
||||
POWER_SUPPLY_USB_TYPE_CDP,
|
||||
POWER_SUPPLY_USB_TYPE_DCP,
|
||||
};
|
||||
|
||||
static const struct power_supply_desc mt6370_chg_psy_desc = {
|
||||
.name = "mt6370-charger",
|
||||
.type = POWER_SUPPLY_TYPE_USB,
|
||||
.properties = mt6370_chg_properties,
|
||||
.num_properties = ARRAY_SIZE(mt6370_chg_properties),
|
||||
.get_property = mt6370_chg_get_property,
|
||||
.set_property = mt6370_chg_set_property,
|
||||
.property_is_writeable = mt6370_chg_property_is_writeable,
|
||||
.usb_types = mt6370_chg_usb_types,
|
||||
.num_usb_types = ARRAY_SIZE(mt6370_chg_usb_types),
|
||||
};
|
||||
|
||||
static const struct regulator_ops mt6370_chg_otg_ops = {
|
||||
.list_voltage = regulator_list_voltage_linear,
|
||||
.enable = regulator_enable_regmap,
|
||||
.disable = regulator_disable_regmap,
|
||||
.is_enabled = regulator_is_enabled_regmap,
|
||||
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
||||
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
||||
.set_current_limit = regulator_set_current_limit_regmap,
|
||||
.get_current_limit = regulator_get_current_limit_regmap,
|
||||
};
|
||||
|
||||
static const u32 mt6370_chg_otg_oc_ma[] = {
|
||||
500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
|
||||
};
|
||||
|
||||
static const struct regulator_desc mt6370_chg_otg_rdesc = {
|
||||
.of_match = "usb-otg-vbus-regulator",
|
||||
.of_parse_cb = mt6370_chg_otg_of_parse_cb,
|
||||
.name = "mt6370-usb-otg-vbus",
|
||||
.ops = &mt6370_chg_otg_ops,
|
||||
.owner = THIS_MODULE,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.min_uV = 4425000,
|
||||
.uV_step = 25000,
|
||||
.n_voltages = 57,
|
||||
.vsel_reg = MT6370_REG_CHG_CTRL5,
|
||||
.vsel_mask = MT6370_VOBST_MASK,
|
||||
.enable_reg = MT6370_REG_CHG_CTRL1,
|
||||
.enable_mask = MT6370_OPA_MODE_MASK,
|
||||
.curr_table = mt6370_chg_otg_oc_ma,
|
||||
.n_current_limits = ARRAY_SIZE(mt6370_chg_otg_oc_ma),
|
||||
.csel_reg = MT6370_REG_CHG_CTRL10,
|
||||
.csel_mask = MT6370_OTG_OC_MASK,
|
||||
};
|
||||
|
||||
static int mt6370_chg_init_rmap_fields(struct mt6370_priv *priv)
|
||||
{
|
||||
int i;
|
||||
const struct mt6370_chg_field *fds = mt6370_chg_fields;
|
||||
|
||||
for (i = 0; i < F_MAX; i++) {
|
||||
priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev,
|
||||
priv->regmap,
|
||||
fds[i].field);
|
||||
if (IS_ERR(priv->rmap_fields[i]))
|
||||
return dev_err_probe(priv->dev,
|
||||
PTR_ERR(priv->rmap_fields[i]),
|
||||
"Failed to allocate regmapfield[%s]\n",
|
||||
fds[i].name);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt6370_chg_init_setting(struct mt6370_priv *priv)
|
||||
{
|
||||
int ret;
|
||||
|
||||
/* Disable usb_chg_en */
|
||||
ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to disable usb_chg_en\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Disable input current limit */
|
||||
ret = mt6370_chg_field_set(priv, F_ILIM_EN, 0);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to disable input current limit\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* ICHG/IEOC Workaround, ICHG can not be set less than 900mA */
|
||||
ret = mt6370_chg_field_set(priv, F_ICHG, 900000);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to set ICHG to 900mA");
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Change input current limit selection to using IAICR results */
|
||||
ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 2);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to set IINLMTSEL\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define MT6370_CHG_DT_PROP_DECL(_name, _type, _field) \
|
||||
{ \
|
||||
.name = "mediatek,chg-" #_name, \
|
||||
.type = MT6370_PARSE_TYPE_##_type, \
|
||||
.fd = _field, \
|
||||
}
|
||||
|
||||
static int mt6370_chg_init_otg_regulator(struct mt6370_priv *priv)
|
||||
{
|
||||
struct regulator_config rcfg = {
|
||||
.dev = priv->dev,
|
||||
.regmap = priv->regmap,
|
||||
.driver_data = priv,
|
||||
};
|
||||
|
||||
priv->rdev = devm_regulator_register(priv->dev, &mt6370_chg_otg_rdesc,
|
||||
&rcfg);
|
||||
|
||||
return PTR_ERR_OR_ZERO(priv->rdev);
|
||||
}
|
||||
|
||||
static int mt6370_chg_init_psy(struct mt6370_priv *priv)
|
||||
{
|
||||
struct power_supply_config cfg = {
|
||||
.drv_data = priv,
|
||||
.of_node = dev_of_node(priv->dev),
|
||||
};
|
||||
|
||||
priv->psy = devm_power_supply_register(priv->dev, &mt6370_chg_psy_desc,
|
||||
&cfg);
|
||||
|
||||
return PTR_ERR_OR_ZERO(priv->psy);
|
||||
}
|
||||
|
||||
static void mt6370_chg_destroy_attach_lock(void *data)
|
||||
{
|
||||
struct mutex *attach_lock = data;
|
||||
|
||||
mutex_destroy(attach_lock);
|
||||
}
|
||||
|
||||
static void mt6370_chg_destroy_wq(void *data)
|
||||
{
|
||||
struct workqueue_struct *wq = data;
|
||||
|
||||
flush_workqueue(wq);
|
||||
destroy_workqueue(wq);
|
||||
}
|
||||
|
||||
static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
|
||||
{
|
||||
struct mt6370_priv *priv = data;
|
||||
unsigned int otg_en;
|
||||
int ret;
|
||||
|
||||
/* Check in OTG mode or not */
|
||||
ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
|
||||
if (ret) {
|
||||
dev_err(priv->dev, "Failed to get OTG state\n");
|
||||
return IRQ_NONE;
|
||||
}
|
||||
|
||||
if (otg_en)
|
||||
return IRQ_HANDLED;
|
||||
|
||||
mutex_lock(&priv->attach_lock);
|
||||
priv->attach = MT6370_ATTACH_STAT_ATTACH_BC12_DONE;
|
||||
mutex_unlock(&priv->attach_lock);
|
||||
|
||||
if (!queue_work(priv->wq, &priv->bc12_work))
|
||||
dev_err(priv->dev, "bc12 work has already queued\n");
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t mt6370_uvp_d_evt_handler(int irq, void *data)
|
||||
{
|
||||
struct mt6370_priv *priv = data;
|
||||
|
||||
mt6370_chg_pwr_rdy_check(priv);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t mt6370_mivr_handler(int irq, void *data)
|
||||
{
|
||||
struct mt6370_priv *priv = data;
|
||||
|
||||
pm_stay_awake(priv->dev);
|
||||
disable_irq_nosync(priv->irq_nums[MT6370_IRQ_MIVR]);
|
||||
schedule_delayed_work(&priv->mivr_dwork, msecs_to_jiffies(200));
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
#define MT6370_CHG_IRQ(_name) \
|
||||
{ \
|
||||
.name = #_name, \
|
||||
.handler = mt6370_##_name##_handler, \
|
||||
}
|
||||
|
||||
static int mt6370_chg_init_irq(struct mt6370_priv *priv)
|
||||
{
|
||||
int i, ret;
|
||||
const struct {
|
||||
char *name;
|
||||
irq_handler_t handler;
|
||||
} mt6370_chg_irqs[] = {
|
||||
MT6370_CHG_IRQ(attach_i),
|
||||
MT6370_CHG_IRQ(uvp_d_evt),
|
||||
MT6370_CHG_IRQ(mivr),
|
||||
};
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) {
|
||||
ret = platform_get_irq_byname(to_platform_device(priv->dev),
|
||||
mt6370_chg_irqs[i].name);
|
||||
if (ret < 0)
|
||||
return dev_err_probe(priv->dev, ret,
|
||||
"Failed to get irq %s\n",
|
||||
mt6370_chg_irqs[i].name);
|
||||
|
||||
priv->irq_nums[i] = ret;
|
||||
ret = devm_request_threaded_irq(priv->dev, ret, NULL,
|
||||
mt6370_chg_irqs[i].handler,
|
||||
IRQF_TRIGGER_FALLING,
|
||||
dev_name(priv->dev), priv);
|
||||
if (ret)
|
||||
return dev_err_probe(priv->dev, ret,
|
||||
"Failed to request irq %s\n",
|
||||
mt6370_chg_irqs[i].name);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt6370_chg_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct mt6370_priv *priv;
|
||||
int ret;
|
||||
|
||||
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return -ENOMEM;
|
||||
|
||||
priv->dev = &pdev->dev;
|
||||
|
||||
priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
|
||||
if (!priv->regmap)
|
||||
return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
|
||||
|
||||
ret = mt6370_chg_init_rmap_fields(priv);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to init regmap fields\n");
|
||||
|
||||
platform_set_drvdata(pdev, priv);
|
||||
|
||||
priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
|
||||
if (IS_ERR(priv->iio_adcs))
|
||||
return dev_err_probe(dev, PTR_ERR(priv->iio_adcs),
|
||||
"Failed to get iio adc\n");
|
||||
|
||||
ret = mt6370_chg_init_otg_regulator(priv);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to init OTG regulator\n");
|
||||
|
||||
ret = mt6370_chg_init_psy(priv);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to init psy\n");
|
||||
|
||||
mutex_init(&priv->attach_lock);
|
||||
ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_attach_lock,
|
||||
&priv->attach_lock);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to init attach lock\n");
|
||||
|
||||
priv->attach = MT6370_ATTACH_STAT_DETACH;
|
||||
|
||||
priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
|
||||
if (!priv->wq)
|
||||
return dev_err_probe(dev, -ENOMEM,
|
||||
"Failed to create workqueue\n");
|
||||
|
||||
ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_wq, priv->wq);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to init wq\n");
|
||||
|
||||
ret = devm_work_autocancel(dev, &priv->bc12_work, mt6370_chg_bc12_work_func);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to init bc12 work\n");
|
||||
|
||||
ret = devm_delayed_work_autocancel(dev, &priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to init mivr delayed work\n");
|
||||
|
||||
ret = mt6370_chg_init_setting(priv);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret,
|
||||
"Failed to init mt6370 charger setting\n");
|
||||
|
||||
ret = mt6370_chg_init_irq(priv);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
mt6370_chg_pwr_rdy_check(priv);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id mt6370_chg_of_match[] = {
|
||||
{ .compatible = "mediatek,mt6370-charger", },
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, mt6370_chg_of_match);
|
||||
|
||||
static struct platform_driver mt6370_chg_driver = {
|
||||
.probe = mt6370_chg_probe,
|
||||
.driver = {
|
||||
.name = "mt6370-charger",
|
||||
.of_match_table = mt6370_chg_of_match,
|
||||
},
|
||||
};
|
||||
module_platform_driver(mt6370_chg_driver);
|
||||
|
||||
MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
|
||||
MODULE_DESCRIPTION("MediaTek MT6370 Charger Driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
@ -442,7 +442,7 @@ static int add_prop_uevent(struct device *dev, struct kobj_uevent_env *env,
|
||||
if (ret == -ENODEV || ret == -ENODATA) {
|
||||
/*
|
||||
* When a battery is absent, we expect -ENODEV. Don't abort;
|
||||
* send the uevent with at least the the PRESENT=0 property
|
||||
* send the uevent with at least the PRESENT=0 property
|
||||
*/
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -50,7 +50,7 @@ static int tps65217_config_charger(struct tps65217_charger *charger)
|
||||
* tps65217 rev. G, p. 31 (see p. 32 for NTC schematic)
|
||||
*
|
||||
* The device can be configured to support a 100k NTC (B = 3960) by
|
||||
* setting the the NTC_TYPE bit in register CHGCONFIG1 to 1. However it
|
||||
* setting the NTC_TYPE bit in register CHGCONFIG1 to 1. However it
|
||||
* is not recommended to do so. In sleep mode, the charger continues
|
||||
* charging the battery, but all register values are reset to default
|
||||
* values. Therefore, the charger would get the wrong temperature
|
||||
|
||||
@ -26,6 +26,17 @@ struct linear_range {
|
||||
unsigned int step;
|
||||
};
|
||||
|
||||
#define LINEAR_RANGE(_min, _min_sel, _max_sel, _step) \
|
||||
{ \
|
||||
.min = _min, \
|
||||
.min_sel = _min_sel, \
|
||||
.max_sel = _max_sel, \
|
||||
.step = _step, \
|
||||
}
|
||||
|
||||
#define LINEAR_RANGE_IDX(_idx, _min, _min_sel, _max_sel, _step) \
|
||||
[_idx] = LINEAR_RANGE(_min, _min_sel, _max_sel, _step)
|
||||
|
||||
unsigned int linear_range_values_in_range(const struct linear_range *r);
|
||||
unsigned int linear_range_values_in_range_array(const struct linear_range *r,
|
||||
int ranges);
|
||||
|
||||
@ -374,9 +374,37 @@ struct power_supply_vbat_ri_table {
|
||||
* These timers should be chosen to align with the typical discharge curve
|
||||
* for the battery.
|
||||
*
|
||||
* When the main CC/CV charging is complete the battery can optionally be
|
||||
* maintenance charged at the voltages from this table: a table of settings is
|
||||
* traversed using a slightly lower current and voltage than what is used for
|
||||
* Ordinary CC/CV charging will stop charging when the charge current goes
|
||||
* below charge_term_current_ua, and then restart it (if the device is still
|
||||
* plugged into the charger) at charge_restart_voltage_uv. This happens in most
|
||||
* consumer products because the power usage while connected to a charger is
|
||||
* not zero, and devices are not manufactured to draw power directly from the
|
||||
* charger: instead they will at all times dissipate the battery a little, like
|
||||
* the power used in standby mode. This will over time give a charge graph
|
||||
* such as this:
|
||||
*
|
||||
* Energy
|
||||
* ^ ... ... ... ... ... ... ...
|
||||
* | . . . . . . . . . . . . .
|
||||
* | .. . .. . .. . .. . .. . .. . ..
|
||||
* |. .. .. .. .. .. ..
|
||||
* +-------------------------------------------------------------------> t
|
||||
*
|
||||
* Practically this means that the Li-ions are wandering back and forth in the
|
||||
* battery and this causes degeneration of the battery anode and cathode.
|
||||
* To prolong the life of the battery, maintenance charging is applied after
|
||||
* reaching charge_term_current_ua to hold up the charge in the battery while
|
||||
* consuming power, thus lowering the wear on the battery:
|
||||
*
|
||||
* Energy
|
||||
* ^ .......................................
|
||||
* | . ......................
|
||||
* | ..
|
||||
* |.
|
||||
* +-------------------------------------------------------------------> t
|
||||
*
|
||||
* Maintenance charging uses the voltages from this table: a table of settings
|
||||
* is traversed using a slightly lower current and voltage than what is used for
|
||||
* CC/CV charging. The maintenance charging will for safety reasons not go on
|
||||
* indefinately: we lower the current and voltage with successive maintenance
|
||||
* settings, then disable charging completely after we reach the last one,
|
||||
@ -385,14 +413,22 @@ struct power_supply_vbat_ri_table {
|
||||
* ordinary CC/CV charging from there.
|
||||
*
|
||||
* As an example, a Samsung EB425161LA Lithium-Ion battery is CC/CV charged
|
||||
* at 900mA to 4340mV, then maintenance charged at 600mA and 4150mV for
|
||||
* 60 hours, then maintenance charged at 600mA and 4100mV for 200 hours.
|
||||
* at 900mA to 4340mV, then maintenance charged at 600mA and 4150mV for up to
|
||||
* 60 hours, then maintenance charged at 600mA and 4100mV for up to 200 hours.
|
||||
* After this the charge cycle is restarted waiting for
|
||||
* charge_restart_voltage_uv.
|
||||
*
|
||||
* For most mobile electronics this type of maintenance charging is enough for
|
||||
* the user to disconnect the device and make use of it before both maintenance
|
||||
* charging cycles are complete.
|
||||
* charging cycles are complete, if the current and voltage has been chosen
|
||||
* appropriately. These need to be determined from battery discharge curves
|
||||
* and expected standby current.
|
||||
*
|
||||
* If the voltage anyway drops to charge_restart_voltage_uv during maintenance
|
||||
* charging, ordinary CC/CV charging is restarted. This can happen if the
|
||||
* device is e.g. actively used during charging, so more current is drawn than
|
||||
* the expected stand-by current. Also overvoltage protection will be applied
|
||||
* as usual.
|
||||
*/
|
||||
struct power_supply_maintenance_charge_table {
|
||||
int charge_current_max_ua;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user