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990 lines
25 KiB
990 lines
25 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Motorola CPCAP PMIC battery charger driver |
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* |
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* Copyright (C) 2017 Tony Lindgren <[email protected]> |
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* |
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* Rewritten for Linux power framework with some parts based on |
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* on earlier driver found in the Motorola Linux kernel: |
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* |
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* Copyright (C) 2009-2010 Motorola, Inc. |
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*/ |
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#include <linux/atomic.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/err.h> |
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#include <linux/interrupt.h> |
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#include <linux/notifier.h> |
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#include <linux/of.h> |
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#include <linux/of_platform.h> |
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#include <linux/platform_device.h> |
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#include <linux/power_supply.h> |
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#include <linux/regmap.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/usb/phy_companion.h> |
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#include <linux/phy/omap_usb.h> |
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#include <linux/usb/otg.h> |
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#include <linux/iio/consumer.h> |
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#include <linux/mfd/motorola-cpcap.h> |
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/* |
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* CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware, |
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* see NXP "MC13783 Power Management and Audio Circuit Users's Guide" |
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* MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers |
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* and values for CPCAP are different, but some of the internal components seem |
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* similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1 |
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* bits that seem to describe the CRM register. |
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*/ |
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#define CPCAP_REG_CRM_UNUSED_641_15 BIT(15) /* 641 = register number */ |
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#define CPCAP_REG_CRM_UNUSED_641_14 BIT(14) /* 641 = register number */ |
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#define CPCAP_REG_CRM_CHRG_LED_EN BIT(13) /* Charger LED */ |
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#define CPCAP_REG_CRM_RVRSMODE BIT(12) /* USB VBUS output enable */ |
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#define CPCAP_REG_CRM_ICHRG_TR1 BIT(11) /* Trickle charge current */ |
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#define CPCAP_REG_CRM_ICHRG_TR0 BIT(10) |
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#define CPCAP_REG_CRM_FET_OVRD BIT(9) /* 0 = hardware, 1 = FET_CTRL */ |
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#define CPCAP_REG_CRM_FET_CTRL BIT(8) /* BPFET 1 if FET_OVRD set */ |
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#define CPCAP_REG_CRM_VCHRG3 BIT(7) /* Charge voltage bits */ |
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#define CPCAP_REG_CRM_VCHRG2 BIT(6) |
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#define CPCAP_REG_CRM_VCHRG1 BIT(5) |
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#define CPCAP_REG_CRM_VCHRG0 BIT(4) |
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#define CPCAP_REG_CRM_ICHRG3 BIT(3) /* Charge current bits */ |
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#define CPCAP_REG_CRM_ICHRG2 BIT(2) |
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#define CPCAP_REG_CRM_ICHRG1 BIT(1) |
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#define CPCAP_REG_CRM_ICHRG0 BIT(0) |
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|
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/* CPCAP_REG_CRM trickle charge voltages */ |
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#define CPCAP_REG_CRM_TR(val) (((val) & 0x3) << 10) |
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#define CPCAP_REG_CRM_TR_0A00 CPCAP_REG_CRM_TR(0x0) |
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#define CPCAP_REG_CRM_TR_0A24 CPCAP_REG_CRM_TR(0x1) |
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#define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2) |
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#define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4) |
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/* |
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* CPCAP_REG_CRM charge voltages based on the ADC channel 1 values. |
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* Note that these register bits don't match MC13783UG.pdf VCHRG |
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* register bits. |
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*/ |
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#define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4) |
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#define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0) |
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#define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1) |
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#define CPCAP_REG_CRM_VCHRG_4V12 CPCAP_REG_CRM_VCHRG(0x2) |
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#define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x3) |
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#define CPCAP_REG_CRM_VCHRG_4V17 CPCAP_REG_CRM_VCHRG(0x4) |
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#define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x5) |
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#define CPCAP_REG_CRM_VCHRG_4V23 CPCAP_REG_CRM_VCHRG(0x6) |
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#define CPCAP_REG_CRM_VCHRG_4V25 CPCAP_REG_CRM_VCHRG(0x7) |
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#define CPCAP_REG_CRM_VCHRG_4V27 CPCAP_REG_CRM_VCHRG(0x8) |
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#define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x9) |
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#define CPCAP_REG_CRM_VCHRG_4V33 CPCAP_REG_CRM_VCHRG(0xa) |
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#define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb) |
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#define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc) |
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#define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd) |
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#define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe) |
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#define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf) |
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/* |
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* CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf |
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* values in "Table 8-3. Charge Path Regulator Current Limit |
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* Characteristics" for the nominal values. |
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* |
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* Except 70mA and 1.596A and unlimited, these are simply 88.7mA / step. |
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*/ |
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#define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0) |
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#define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0) |
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#define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1) |
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#define CPCAP_REG_CRM_ICHRG_0A177 CPCAP_REG_CRM_ICHRG(0x2) |
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#define CPCAP_REG_CRM_ICHRG_0A266 CPCAP_REG_CRM_ICHRG(0x3) |
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#define CPCAP_REG_CRM_ICHRG_0A355 CPCAP_REG_CRM_ICHRG(0x4) |
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#define CPCAP_REG_CRM_ICHRG_0A443 CPCAP_REG_CRM_ICHRG(0x5) |
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#define CPCAP_REG_CRM_ICHRG_0A532 CPCAP_REG_CRM_ICHRG(0x6) |
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#define CPCAP_REG_CRM_ICHRG_0A621 CPCAP_REG_CRM_ICHRG(0x7) |
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#define CPCAP_REG_CRM_ICHRG_0A709 CPCAP_REG_CRM_ICHRG(0x8) |
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#define CPCAP_REG_CRM_ICHRG_0A798 CPCAP_REG_CRM_ICHRG(0x9) |
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#define CPCAP_REG_CRM_ICHRG_0A886 CPCAP_REG_CRM_ICHRG(0xa) |
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#define CPCAP_REG_CRM_ICHRG_0A975 CPCAP_REG_CRM_ICHRG(0xb) |
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#define CPCAP_REG_CRM_ICHRG_1A064 CPCAP_REG_CRM_ICHRG(0xc) |
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#define CPCAP_REG_CRM_ICHRG_1A152 CPCAP_REG_CRM_ICHRG(0xd) |
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#define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe) |
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#define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf) |
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/* CPCAP_REG_VUSBC register bits needed for VBUS */ |
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#define CPCAP_BIT_VBUS_SWITCH BIT(0) /* VBUS boost to 5V */ |
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enum { |
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CPCAP_CHARGER_IIO_BATTDET, |
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CPCAP_CHARGER_IIO_VOLTAGE, |
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CPCAP_CHARGER_IIO_VBUS, |
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CPCAP_CHARGER_IIO_CHRG_CURRENT, |
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CPCAP_CHARGER_IIO_BATT_CURRENT, |
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CPCAP_CHARGER_IIO_NR, |
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}; |
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struct cpcap_charger_ddata { |
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struct device *dev; |
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struct regmap *reg; |
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struct list_head irq_list; |
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struct delayed_work detect_work; |
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struct delayed_work vbus_work; |
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struct gpio_desc *gpio[2]; /* gpio_reven0 & 1 */ |
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struct iio_channel *channels[CPCAP_CHARGER_IIO_NR]; |
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struct power_supply *usb; |
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struct phy_companion comparator; /* For USB VBUS */ |
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unsigned int vbus_enabled:1; |
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unsigned int feeding_vbus:1; |
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atomic_t active; |
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int status; |
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int voltage; |
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int limit_current; |
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}; |
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struct cpcap_interrupt_desc { |
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int irq; |
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struct list_head node; |
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const char *name; |
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}; |
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struct cpcap_charger_ints_state { |
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bool chrg_det; |
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bool rvrs_chrg; |
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bool vbusov; |
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bool chrg_se1b; |
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bool rvrs_mode; |
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bool chrgcurr2; |
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bool chrgcurr1; |
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bool vbusvld; |
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bool battdetb; |
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}; |
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static enum power_supply_property cpcap_charger_props[] = { |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, |
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POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_CURRENT_NOW, |
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}; |
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static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata) |
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{ |
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struct iio_channel *channel; |
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int error, value = 0; |
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channel = ddata->channels[CPCAP_CHARGER_IIO_VOLTAGE]; |
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error = iio_read_channel_processed(channel, &value); |
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if (error < 0) { |
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dev_warn(ddata->dev, "%s failed: %i\n", __func__, error); |
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return 0; |
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} |
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return value; |
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} |
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static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata) |
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{ |
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struct iio_channel *channel; |
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int error, value = 0; |
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channel = ddata->channels[CPCAP_CHARGER_IIO_CHRG_CURRENT]; |
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error = iio_read_channel_processed(channel, &value); |
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if (error < 0) { |
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dev_warn(ddata->dev, "%s failed: %i\n", __func__, error); |
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return 0; |
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} |
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return value; |
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} |
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static int cpcap_charger_get_property(struct power_supply *psy, |
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enum power_supply_property psp, |
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union power_supply_propval *val) |
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{ |
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struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent); |
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switch (psp) { |
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case POWER_SUPPLY_PROP_STATUS: |
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val->intval = ddata->status; |
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break; |
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
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val->intval = ddata->limit_current; |
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break; |
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
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val->intval = ddata->voltage; |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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if (ddata->status == POWER_SUPPLY_STATUS_CHARGING) |
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val->intval = cpcap_charger_get_charge_voltage(ddata) * |
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1000; |
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else |
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val->intval = 0; |
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break; |
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case POWER_SUPPLY_PROP_CURRENT_NOW: |
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if (ddata->status == POWER_SUPPLY_STATUS_CHARGING) |
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val->intval = cpcap_charger_get_charge_current(ddata) * |
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1000; |
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else |
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val->intval = 0; |
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break; |
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case POWER_SUPPLY_PROP_ONLINE: |
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val->intval = ddata->status == POWER_SUPPLY_STATUS_CHARGING; |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int cpcap_charger_match_voltage(int voltage) |
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{ |
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switch (voltage) { |
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case 0 ... 4100000 - 1: return 3800000; |
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case 4100000 ... 4120000 - 1: return 4100000; |
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case 4120000 ... 4150000 - 1: return 4120000; |
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case 4150000 ... 4170000 - 1: return 4150000; |
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case 4170000 ... 4200000 - 1: return 4170000; |
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case 4200000 ... 4230000 - 1: return 4200000; |
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case 4230000 ... 4250000 - 1: return 4230000; |
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case 4250000 ... 4270000 - 1: return 4250000; |
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case 4270000 ... 4300000 - 1: return 4270000; |
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case 4300000 ... 4330000 - 1: return 4300000; |
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case 4330000 ... 4350000 - 1: return 4330000; |
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case 4350000 ... 4380000 - 1: return 4350000; |
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case 4380000 ... 4400000 - 1: return 4380000; |
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case 4400000 ... 4420000 - 1: return 4400000; |
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case 4420000 ... 4440000 - 1: return 4420000; |
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case 4440000: return 4440000; |
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default: return 0; |
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} |
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} |
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static int |
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cpcap_charger_get_bat_const_charge_voltage(struct cpcap_charger_ddata *ddata) |
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{ |
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union power_supply_propval prop; |
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struct power_supply *battery; |
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int voltage = ddata->voltage; |
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int error; |
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battery = power_supply_get_by_name("battery"); |
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if (battery) { |
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error = power_supply_get_property(battery, |
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, |
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&prop); |
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if (!error) |
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voltage = prop.intval; |
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power_supply_put(battery); |
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} |
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return voltage; |
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} |
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static int cpcap_charger_current_to_regval(int microamp) |
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{ |
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int miliamp = microamp / 1000; |
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int res; |
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if (miliamp < 0) |
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return -EINVAL; |
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if (miliamp < 70) |
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return CPCAP_REG_CRM_ICHRG(0x0); |
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if (miliamp < 177) |
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return CPCAP_REG_CRM_ICHRG(0x1); |
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if (miliamp >= 1596) |
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return CPCAP_REG_CRM_ICHRG(0xe); |
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res = microamp / 88666; |
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if (res > 0xd) |
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res = 0xd; |
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return CPCAP_REG_CRM_ICHRG(res); |
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} |
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static int cpcap_charger_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 cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent); |
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int voltage, batvolt; |
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switch (psp) { |
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
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if (cpcap_charger_current_to_regval(val->intval) < 0) |
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return -EINVAL; |
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ddata->limit_current = val->intval; |
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schedule_delayed_work(&ddata->detect_work, 0); |
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break; |
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
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voltage = cpcap_charger_match_voltage(val->intval); |
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batvolt = cpcap_charger_get_bat_const_charge_voltage(ddata); |
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if (voltage > batvolt) |
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voltage = batvolt; |
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ddata->voltage = voltage; |
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schedule_delayed_work(&ddata->detect_work, 0); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int cpcap_charger_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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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
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return 1; |
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default: |
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return 0; |
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} |
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} |
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static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata, |
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bool enabled) |
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{ |
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if (!ddata->gpio[0]) |
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return; |
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gpiod_set_value(ddata->gpio[0], enabled); |
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} |
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static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata, |
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bool enabled) |
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{ |
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if (!ddata->gpio[1]) |
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return; |
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gpiod_set_value(ddata->gpio[1], enabled); |
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} |
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static void cpcap_charger_update_state(struct cpcap_charger_ddata *ddata, |
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int state) |
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{ |
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const char *status; |
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if (state > POWER_SUPPLY_STATUS_FULL) { |
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dev_warn(ddata->dev, "unknown state: %i\n", state); |
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return; |
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} |
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ddata->status = state; |
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switch (state) { |
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case POWER_SUPPLY_STATUS_DISCHARGING: |
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status = "DISCONNECTED"; |
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break; |
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case POWER_SUPPLY_STATUS_NOT_CHARGING: |
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status = "DETECTING"; |
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break; |
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case POWER_SUPPLY_STATUS_CHARGING: |
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status = "CHARGING"; |
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break; |
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case POWER_SUPPLY_STATUS_FULL: |
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status = "DONE"; |
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break; |
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default: |
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return; |
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} |
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dev_dbg(ddata->dev, "state: %s\n", status); |
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} |
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static int cpcap_charger_disable(struct cpcap_charger_ddata *ddata) |
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{ |
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int error; |
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error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff, |
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CPCAP_REG_CRM_FET_OVRD | |
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CPCAP_REG_CRM_FET_CTRL); |
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if (error) |
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dev_err(ddata->dev, "%s failed with %i\n", __func__, error); |
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return error; |
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} |
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static int cpcap_charger_enable(struct cpcap_charger_ddata *ddata, |
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int max_voltage, int charge_current, |
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int trickle_current) |
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{ |
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int error; |
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if (!max_voltage || !charge_current) |
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return -EINVAL; |
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dev_dbg(ddata->dev, "enable: %i %i %i\n", |
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max_voltage, charge_current, trickle_current); |
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error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff, |
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CPCAP_REG_CRM_CHRG_LED_EN | |
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trickle_current | |
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CPCAP_REG_CRM_FET_OVRD | |
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CPCAP_REG_CRM_FET_CTRL | |
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max_voltage | |
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charge_current); |
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if (error) |
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dev_err(ddata->dev, "%s failed with %i\n", __func__, error); |
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return error; |
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} |
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static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata) |
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{ |
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int error, value = 0; |
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struct iio_channel *channel = |
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ddata->channels[CPCAP_CHARGER_IIO_VBUS]; |
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error = iio_read_channel_processed(channel, &value); |
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if (error >= 0) |
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return value > 3900; |
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dev_err(ddata->dev, "error reading VBUS: %i\n", error); |
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return false; |
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} |
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/* VBUS control functions for the USB PHY companion */ |
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static void cpcap_charger_vbus_work(struct work_struct *work) |
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{ |
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struct cpcap_charger_ddata *ddata; |
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bool vbus = false; |
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int error; |
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ddata = container_of(work, struct cpcap_charger_ddata, |
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vbus_work.work); |
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if (ddata->vbus_enabled) { |
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vbus = cpcap_charger_vbus_valid(ddata); |
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if (vbus) { |
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dev_dbg(ddata->dev, "VBUS already provided\n"); |
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return; |
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} |
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ddata->feeding_vbus = true; |
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cpcap_charger_set_cable_path(ddata, false); |
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cpcap_charger_set_inductive_path(ddata, false); |
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error = cpcap_charger_disable(ddata); |
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if (error) |
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goto out_err; |
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cpcap_charger_update_state(ddata, |
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POWER_SUPPLY_STATUS_DISCHARGING); |
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error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC, |
|
CPCAP_BIT_VBUS_SWITCH, |
|
CPCAP_BIT_VBUS_SWITCH); |
|
if (error) |
|
goto out_err; |
|
|
|
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, |
|
CPCAP_REG_CRM_RVRSMODE, |
|
CPCAP_REG_CRM_RVRSMODE); |
|
if (error) |
|
goto out_err; |
|
} else { |
|
error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC, |
|
CPCAP_BIT_VBUS_SWITCH, 0); |
|
if (error) |
|
goto out_err; |
|
|
|
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, |
|
CPCAP_REG_CRM_RVRSMODE, 0); |
|
if (error) |
|
goto out_err; |
|
|
|
cpcap_charger_set_cable_path(ddata, true); |
|
cpcap_charger_set_inductive_path(ddata, true); |
|
ddata->feeding_vbus = false; |
|
} |
|
|
|
return; |
|
|
|
out_err: |
|
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN); |
|
dev_err(ddata->dev, "%s could not %s vbus: %i\n", __func__, |
|
ddata->vbus_enabled ? "enable" : "disable", error); |
|
} |
|
|
|
static int cpcap_charger_set_vbus(struct phy_companion *comparator, |
|
bool enabled) |
|
{ |
|
struct cpcap_charger_ddata *ddata = |
|
container_of(comparator, struct cpcap_charger_ddata, |
|
comparator); |
|
|
|
ddata->vbus_enabled = enabled; |
|
schedule_delayed_work(&ddata->vbus_work, 0); |
|
|
|
return 0; |
|
} |
|
|
|
/* Charger interrupt handling functions */ |
|
|
|
static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata, |
|
struct cpcap_charger_ints_state *s) |
|
{ |
|
int val, error; |
|
|
|
error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val); |
|
if (error) |
|
return error; |
|
|
|
s->chrg_det = val & BIT(13); |
|
s->rvrs_chrg = val & BIT(12); |
|
s->vbusov = val & BIT(11); |
|
|
|
error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val); |
|
if (error) |
|
return error; |
|
|
|
s->chrg_se1b = val & BIT(13); |
|
s->rvrs_mode = val & BIT(6); |
|
s->chrgcurr2 = val & BIT(5); |
|
s->chrgcurr1 = val & BIT(4); |
|
s->vbusvld = val & BIT(3); |
|
|
|
error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val); |
|
if (error) |
|
return error; |
|
|
|
s->battdetb = val & BIT(6); |
|
|
|
return 0; |
|
} |
|
|
|
static int cpcap_charger_voltage_to_regval(int voltage) |
|
{ |
|
int offset; |
|
|
|
switch (voltage) { |
|
case 0 ... 4100000 - 1: |
|
return 0; |
|
case 4100000 ... 4200000 - 1: |
|
offset = 1; |
|
break; |
|
case 4200000 ... 4300000 - 1: |
|
offset = 0; |
|
break; |
|
case 4300000 ... 4380000 - 1: |
|
offset = -1; |
|
break; |
|
case 4380000 ... 4440000: |
|
offset = -2; |
|
break; |
|
default: |
|
return 0; |
|
} |
|
|
|
return ((voltage - 4100000) / 20000) + offset; |
|
} |
|
|
|
static void cpcap_charger_disconnect(struct cpcap_charger_ddata *ddata, |
|
int state, unsigned long delay) |
|
{ |
|
int error; |
|
|
|
/* Update battery state before disconnecting the charger */ |
|
switch (state) { |
|
case POWER_SUPPLY_STATUS_DISCHARGING: |
|
case POWER_SUPPLY_STATUS_FULL: |
|
power_supply_changed(ddata->usb); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
error = cpcap_charger_disable(ddata); |
|
if (error) { |
|
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN); |
|
return; |
|
} |
|
|
|
cpcap_charger_update_state(ddata, state); |
|
power_supply_changed(ddata->usb); |
|
schedule_delayed_work(&ddata->detect_work, delay); |
|
} |
|
|
|
static void cpcap_usb_detect(struct work_struct *work) |
|
{ |
|
struct cpcap_charger_ddata *ddata; |
|
struct cpcap_charger_ints_state s; |
|
int error, new_state; |
|
|
|
ddata = container_of(work, struct cpcap_charger_ddata, |
|
detect_work.work); |
|
|
|
error = cpcap_charger_get_ints_state(ddata, &s); |
|
if (error) |
|
return; |
|
|
|
/* Just init the state if a charger is connected with no chrg_det set */ |
|
if (!s.chrg_det && s.chrgcurr1 && s.vbusvld) { |
|
cpcap_charger_update_state(ddata, |
|
POWER_SUPPLY_STATUS_NOT_CHARGING); |
|
|
|
return; |
|
} |
|
|
|
/* |
|
* If battery voltage is higher than charge voltage, it may have been |
|
* charged to 4.35V by Android. Try again in 10 minutes. |
|
*/ |
|
if (cpcap_charger_get_charge_voltage(ddata) > ddata->voltage) { |
|
cpcap_charger_disconnect(ddata, |
|
POWER_SUPPLY_STATUS_NOT_CHARGING, |
|
HZ * 60 * 10); |
|
|
|
return; |
|
} |
|
|
|
/* Delay for 80ms to avoid vbus bouncing when usb cable is plugged in */ |
|
usleep_range(80000, 120000); |
|
|
|
/* Throttle chrgcurr2 interrupt for charger done and retry */ |
|
switch (ddata->status) { |
|
case POWER_SUPPLY_STATUS_CHARGING: |
|
if (s.chrgcurr2) |
|
break; |
|
new_state = POWER_SUPPLY_STATUS_FULL; |
|
|
|
if (s.chrgcurr1 && s.vbusvld) { |
|
cpcap_charger_disconnect(ddata, new_state, HZ * 5); |
|
return; |
|
} |
|
break; |
|
case POWER_SUPPLY_STATUS_FULL: |
|
if (!s.chrgcurr2) |
|
break; |
|
if (s.vbusvld) |
|
new_state = POWER_SUPPLY_STATUS_NOT_CHARGING; |
|
else |
|
new_state = POWER_SUPPLY_STATUS_DISCHARGING; |
|
|
|
cpcap_charger_disconnect(ddata, new_state, HZ * 5); |
|
|
|
return; |
|
default: |
|
break; |
|
} |
|
|
|
if (!ddata->feeding_vbus && cpcap_charger_vbus_valid(ddata) && |
|
s.chrgcurr1) { |
|
int max_current; |
|
int vchrg, ichrg; |
|
union power_supply_propval val; |
|
struct power_supply *battery; |
|
|
|
battery = power_supply_get_by_name("battery"); |
|
if (IS_ERR_OR_NULL(battery)) { |
|
dev_err(ddata->dev, "battery power_supply not available %li\n", |
|
PTR_ERR(battery)); |
|
return; |
|
} |
|
|
|
error = power_supply_get_property(battery, POWER_SUPPLY_PROP_PRESENT, &val); |
|
power_supply_put(battery); |
|
if (error) |
|
goto out_err; |
|
|
|
if (val.intval) { |
|
max_current = 1596000; |
|
} else { |
|
dev_info(ddata->dev, "battery not inserted, charging disabled\n"); |
|
max_current = 0; |
|
} |
|
|
|
if (max_current > ddata->limit_current) |
|
max_current = ddata->limit_current; |
|
|
|
ichrg = cpcap_charger_current_to_regval(max_current); |
|
vchrg = cpcap_charger_voltage_to_regval(ddata->voltage); |
|
error = cpcap_charger_enable(ddata, |
|
CPCAP_REG_CRM_VCHRG(vchrg), |
|
ichrg, 0); |
|
if (error) |
|
goto out_err; |
|
cpcap_charger_update_state(ddata, |
|
POWER_SUPPLY_STATUS_CHARGING); |
|
} else { |
|
error = cpcap_charger_disable(ddata); |
|
if (error) |
|
goto out_err; |
|
cpcap_charger_update_state(ddata, |
|
POWER_SUPPLY_STATUS_DISCHARGING); |
|
} |
|
|
|
power_supply_changed(ddata->usb); |
|
return; |
|
|
|
out_err: |
|
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN); |
|
dev_err(ddata->dev, "%s failed with %i\n", __func__, error); |
|
} |
|
|
|
static irqreturn_t cpcap_charger_irq_thread(int irq, void *data) |
|
{ |
|
struct cpcap_charger_ddata *ddata = data; |
|
|
|
if (!atomic_read(&ddata->active)) |
|
return IRQ_NONE; |
|
|
|
schedule_delayed_work(&ddata->detect_work, 0); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int cpcap_usb_init_irq(struct platform_device *pdev, |
|
struct cpcap_charger_ddata *ddata, |
|
const char *name) |
|
{ |
|
struct cpcap_interrupt_desc *d; |
|
int irq, error; |
|
|
|
irq = platform_get_irq_byname(pdev, name); |
|
if (irq < 0) |
|
return -ENODEV; |
|
|
|
error = devm_request_threaded_irq(ddata->dev, irq, NULL, |
|
cpcap_charger_irq_thread, |
|
IRQF_SHARED | IRQF_ONESHOT, |
|
name, ddata); |
|
if (error) { |
|
dev_err(ddata->dev, "could not get irq %s: %i\n", |
|
name, error); |
|
|
|
return error; |
|
} |
|
|
|
d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL); |
|
if (!d) |
|
return -ENOMEM; |
|
|
|
d->name = name; |
|
d->irq = irq; |
|
list_add(&d->node, &ddata->irq_list); |
|
|
|
return 0; |
|
} |
|
|
|
static const char * const cpcap_charger_irqs[] = { |
|
/* REG_INT_0 */ |
|
"chrg_det", "rvrs_chrg", |
|
|
|
/* REG_INT1 */ |
|
"chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld", |
|
|
|
/* REG_INT_3 */ |
|
"battdetb", |
|
}; |
|
|
|
static int cpcap_usb_init_interrupts(struct platform_device *pdev, |
|
struct cpcap_charger_ddata *ddata) |
|
{ |
|
int i, error; |
|
|
|
for (i = 0; i < ARRAY_SIZE(cpcap_charger_irqs); i++) { |
|
error = cpcap_usb_init_irq(pdev, ddata, cpcap_charger_irqs[i]); |
|
if (error) |
|
return error; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < 2; i++) { |
|
ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode", |
|
i, GPIOD_OUT_HIGH); |
|
if (IS_ERR(ddata->gpio[i])) { |
|
dev_info(ddata->dev, "no mode change GPIO%i: %li\n", |
|
i, PTR_ERR(ddata->gpio[i])); |
|
ddata->gpio[i] = NULL; |
|
} |
|
} |
|
} |
|
|
|
static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata) |
|
{ |
|
const char * const names[CPCAP_CHARGER_IIO_NR] = { |
|
"battdetb", "battp", "vbus", "chg_isense", "batti", |
|
}; |
|
int error, i; |
|
|
|
for (i = 0; i < CPCAP_CHARGER_IIO_NR; i++) { |
|
ddata->channels[i] = devm_iio_channel_get(ddata->dev, |
|
names[i]); |
|
if (IS_ERR(ddata->channels[i])) { |
|
error = PTR_ERR(ddata->channels[i]); |
|
goto out_err; |
|
} |
|
|
|
if (!ddata->channels[i]->indio_dev) { |
|
error = -ENXIO; |
|
goto out_err; |
|
} |
|
} |
|
|
|
return 0; |
|
|
|
out_err: |
|
if (error != -EPROBE_DEFER) |
|
dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n", |
|
error); |
|
|
|
return error; |
|
} |
|
|
|
static char *cpcap_charger_supplied_to[] = { |
|
"battery", |
|
}; |
|
|
|
static const struct power_supply_desc cpcap_charger_usb_desc = { |
|
.name = "usb", |
|
.type = POWER_SUPPLY_TYPE_USB, |
|
.properties = cpcap_charger_props, |
|
.num_properties = ARRAY_SIZE(cpcap_charger_props), |
|
.get_property = cpcap_charger_get_property, |
|
.set_property = cpcap_charger_set_property, |
|
.property_is_writeable = cpcap_charger_property_is_writeable, |
|
}; |
|
|
|
#ifdef CONFIG_OF |
|
static const struct of_device_id cpcap_charger_id_table[] = { |
|
{ |
|
.compatible = "motorola,mapphone-cpcap-charger", |
|
}, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(of, cpcap_charger_id_table); |
|
#endif |
|
|
|
static int cpcap_charger_probe(struct platform_device *pdev) |
|
{ |
|
struct cpcap_charger_ddata *ddata; |
|
const struct of_device_id *of_id; |
|
struct power_supply_config psy_cfg = {}; |
|
int error; |
|
|
|
of_id = of_match_device(of_match_ptr(cpcap_charger_id_table), |
|
&pdev->dev); |
|
if (!of_id) |
|
return -EINVAL; |
|
|
|
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); |
|
if (!ddata) |
|
return -ENOMEM; |
|
|
|
ddata->dev = &pdev->dev; |
|
ddata->voltage = 4200000; |
|
ddata->limit_current = 532000; |
|
|
|
ddata->reg = dev_get_regmap(ddata->dev->parent, NULL); |
|
if (!ddata->reg) |
|
return -ENODEV; |
|
|
|
INIT_LIST_HEAD(&ddata->irq_list); |
|
INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect); |
|
INIT_DELAYED_WORK(&ddata->vbus_work, cpcap_charger_vbus_work); |
|
platform_set_drvdata(pdev, ddata); |
|
|
|
error = cpcap_charger_init_iio(ddata); |
|
if (error) |
|
return error; |
|
|
|
atomic_set(&ddata->active, 1); |
|
|
|
psy_cfg.of_node = pdev->dev.of_node; |
|
psy_cfg.drv_data = ddata; |
|
psy_cfg.supplied_to = cpcap_charger_supplied_to; |
|
psy_cfg.num_supplicants = ARRAY_SIZE(cpcap_charger_supplied_to), |
|
|
|
ddata->usb = devm_power_supply_register(ddata->dev, |
|
&cpcap_charger_usb_desc, |
|
&psy_cfg); |
|
if (IS_ERR(ddata->usb)) { |
|
error = PTR_ERR(ddata->usb); |
|
dev_err(ddata->dev, "failed to register USB charger: %i\n", |
|
error); |
|
|
|
return error; |
|
} |
|
|
|
error = cpcap_usb_init_interrupts(pdev, ddata); |
|
if (error) |
|
return error; |
|
|
|
ddata->comparator.set_vbus = cpcap_charger_set_vbus; |
|
error = omap_usb2_set_comparator(&ddata->comparator); |
|
if (error == -ENODEV) { |
|
dev_info(ddata->dev, "charger needs phy, deferring probe\n"); |
|
return -EPROBE_DEFER; |
|
} |
|
|
|
cpcap_charger_init_optional_gpios(ddata); |
|
|
|
schedule_delayed_work(&ddata->detect_work, 0); |
|
|
|
return 0; |
|
} |
|
|
|
static void cpcap_charger_shutdown(struct platform_device *pdev) |
|
{ |
|
struct cpcap_charger_ddata *ddata = platform_get_drvdata(pdev); |
|
int error; |
|
|
|
atomic_set(&ddata->active, 0); |
|
error = omap_usb2_set_comparator(NULL); |
|
if (error) |
|
dev_warn(ddata->dev, "could not clear USB comparator: %i\n", |
|
error); |
|
|
|
error = cpcap_charger_disable(ddata); |
|
if (error) { |
|
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN); |
|
dev_warn(ddata->dev, "could not clear charger: %i\n", |
|
error); |
|
} |
|
cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_DISCHARGING); |
|
cancel_delayed_work_sync(&ddata->vbus_work); |
|
cancel_delayed_work_sync(&ddata->detect_work); |
|
} |
|
|
|
static int cpcap_charger_remove(struct platform_device *pdev) |
|
{ |
|
cpcap_charger_shutdown(pdev); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver cpcap_charger_driver = { |
|
.probe = cpcap_charger_probe, |
|
.driver = { |
|
.name = "cpcap-charger", |
|
.of_match_table = of_match_ptr(cpcap_charger_id_table), |
|
}, |
|
.shutdown = cpcap_charger_shutdown, |
|
.remove = cpcap_charger_remove, |
|
}; |
|
module_platform_driver(cpcap_charger_driver); |
|
|
|
MODULE_AUTHOR("Tony Lindgren <[email protected]>"); |
|
MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver"); |
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_ALIAS("platform:cpcap-charger");
|
|
|