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691 lines
18 KiB
691 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Driver for UCS1002 Programmable USB Port Power Controller |
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* |
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* Copyright (C) 2019 Zodiac Inflight Innovations |
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*/ |
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#include <linux/bits.h> |
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#include <linux/freezer.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/kthread.h> |
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#include <linux/device.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/of_irq.h> |
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#include <linux/power_supply.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/of_regulator.h> |
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|
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/* UCS1002 Registers */ |
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#define UCS1002_REG_CURRENT_MEASUREMENT 0x00 |
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|
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/* |
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* The Total Accumulated Charge registers store the total accumulated |
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* charge delivered from the VS source to a portable device. The total |
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* value is calculated using four registers, from 01h to 04h. The bit |
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* weighting of the registers is given in mA/hrs. |
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*/ |
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#define UCS1002_REG_TOTAL_ACC_CHARGE 0x01 |
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|
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/* Other Status Register */ |
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#define UCS1002_REG_OTHER_STATUS 0x0f |
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# define F_ADET_PIN BIT(4) |
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# define F_CHG_ACT BIT(3) |
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|
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/* Interrupt Status */ |
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#define UCS1002_REG_INTERRUPT_STATUS 0x10 |
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# define F_ERR BIT(7) |
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# define F_DISCHARGE_ERR BIT(6) |
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# define F_RESET BIT(5) |
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# define F_MIN_KEEP_OUT BIT(4) |
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# define F_TSD BIT(3) |
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# define F_OVER_VOLT BIT(2) |
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# define F_BACK_VOLT BIT(1) |
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# define F_OVER_ILIM BIT(0) |
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|
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/* Pin Status Register */ |
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#define UCS1002_REG_PIN_STATUS 0x14 |
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# define UCS1002_PWR_STATE_MASK 0x03 |
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# define F_PWR_EN_PIN BIT(6) |
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# define F_M2_PIN BIT(5) |
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# define F_M1_PIN BIT(4) |
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# define F_EM_EN_PIN BIT(3) |
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# define F_SEL_PIN BIT(2) |
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# define F_ACTIVE_MODE_MASK GENMASK(5, 3) |
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# define F_ACTIVE_MODE_PASSTHROUGH F_M2_PIN |
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# define F_ACTIVE_MODE_DEDICATED F_EM_EN_PIN |
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# define F_ACTIVE_MODE_BC12_DCP (F_M2_PIN | F_EM_EN_PIN) |
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# define F_ACTIVE_MODE_BC12_SDP F_M1_PIN |
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# define F_ACTIVE_MODE_BC12_CDP (F_M1_PIN | F_M2_PIN | F_EM_EN_PIN) |
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|
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/* General Configuration Register */ |
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#define UCS1002_REG_GENERAL_CFG 0x15 |
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# define F_RATION_EN BIT(3) |
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|
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/* Emulation Configuration Register */ |
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#define UCS1002_REG_EMU_CFG 0x16 |
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|
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/* Switch Configuration Register */ |
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#define UCS1002_REG_SWITCH_CFG 0x17 |
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# define F_PIN_IGNORE BIT(7) |
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# define F_EM_EN_SET BIT(5) |
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# define F_M2_SET BIT(4) |
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# define F_M1_SET BIT(3) |
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# define F_S0_SET BIT(2) |
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# define F_PWR_EN_SET BIT(1) |
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# define F_LATCH_SET BIT(0) |
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# define V_SET_ACTIVE_MODE_MASK GENMASK(5, 3) |
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# define V_SET_ACTIVE_MODE_PASSTHROUGH F_M2_SET |
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# define V_SET_ACTIVE_MODE_DEDICATED F_EM_EN_SET |
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# define V_SET_ACTIVE_MODE_BC12_DCP (F_M2_SET | F_EM_EN_SET) |
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# define V_SET_ACTIVE_MODE_BC12_SDP F_M1_SET |
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# define V_SET_ACTIVE_MODE_BC12_CDP (F_M1_SET | F_M2_SET | F_EM_EN_SET) |
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/* Current Limit Register */ |
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#define UCS1002_REG_ILIMIT 0x19 |
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# define UCS1002_ILIM_SW_MASK GENMASK(3, 0) |
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|
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/* Product ID */ |
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#define UCS1002_REG_PRODUCT_ID 0xfd |
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# define UCS1002_PRODUCT_ID 0x4e |
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|
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/* Manufacture name */ |
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#define UCS1002_MANUFACTURER "SMSC" |
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struct ucs1002_info { |
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struct power_supply *charger; |
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struct i2c_client *client; |
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struct regmap *regmap; |
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struct regulator_desc *regulator_descriptor; |
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struct regulator_dev *rdev; |
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bool present; |
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bool output_disable; |
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struct delayed_work health_poll; |
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int health; |
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}; |
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static enum power_supply_property ucs1002_props[] = { |
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POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_CHARGE_NOW, |
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POWER_SUPPLY_PROP_CURRENT_NOW, |
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POWER_SUPPLY_PROP_CURRENT_MAX, |
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POWER_SUPPLY_PROP_PRESENT, /* the presence of PED */ |
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POWER_SUPPLY_PROP_MANUFACTURER, |
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POWER_SUPPLY_PROP_USB_TYPE, |
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POWER_SUPPLY_PROP_HEALTH, |
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}; |
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static int ucs1002_get_online(struct ucs1002_info *info, |
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union power_supply_propval *val) |
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{ |
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unsigned int reg; |
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int ret; |
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ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®); |
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if (ret) |
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return ret; |
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val->intval = !!(reg & F_CHG_ACT); |
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return 0; |
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} |
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static int ucs1002_get_charge(struct ucs1002_info *info, |
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union power_supply_propval *val) |
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{ |
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/* |
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* To fit within 32 bits some values are rounded (uA/h) |
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* |
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* For Total Accumulated Charge Middle Low Byte register, addr |
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* 03h, byte 2 |
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* |
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* B0: 0.01084 mA/h rounded to 11 uA/h |
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* B1: 0.02169 mA/h rounded to 22 uA/h |
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* B2: 0.04340 mA/h rounded to 43 uA/h |
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* B3: 0.08676 mA/h rounded to 87 uA/h |
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* B4: 0.17350 mA/h rounded to 173 uÁ/h |
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* |
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* For Total Accumulated Charge Low Byte register, addr 04h, |
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* byte 3 |
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* |
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* B6: 0.00271 mA/h rounded to 3 uA/h |
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* B7: 0.005422 mA/h rounded to 5 uA/h |
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*/ |
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static const int bit_weights_uAh[BITS_PER_TYPE(u32)] = { |
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/* |
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* Bit corresponding to low byte (offset 0x04) |
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* B0 B1 B2 B3 B4 B5 B6 B7 |
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*/ |
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0, 0, 0, 0, 0, 0, 3, 5, |
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/* |
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* Bit corresponding to middle low byte (offset 0x03) |
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* B0 B1 B2 B3 B4 B5 B6 B7 |
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*/ |
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11, 22, 43, 87, 173, 347, 694, 1388, |
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/* |
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* Bit corresponding to middle high byte (offset 0x02) |
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* B0 B1 B2 B3 B4 B5 B6 B7 |
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*/ |
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2776, 5552, 11105, 22210, 44420, 88840, 177700, 355400, |
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/* |
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* Bit corresponding to high byte (offset 0x01) |
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* B0 B1 B2 B3 B4 B5 B6 B7 |
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*/ |
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710700, 1421000, 2843000, 5685000, 11371000, 22742000, |
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45484000, 90968000, |
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}; |
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unsigned long total_acc_charger; |
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unsigned int reg; |
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int i, ret; |
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ret = regmap_bulk_read(info->regmap, UCS1002_REG_TOTAL_ACC_CHARGE, |
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®, sizeof(u32)); |
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if (ret) |
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return ret; |
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total_acc_charger = be32_to_cpu(reg); /* BE as per offsets above */ |
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val->intval = 0; |
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for_each_set_bit(i, &total_acc_charger, ARRAY_SIZE(bit_weights_uAh)) |
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val->intval += bit_weights_uAh[i]; |
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return 0; |
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} |
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static int ucs1002_get_current(struct ucs1002_info *info, |
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union power_supply_propval *val) |
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{ |
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/* |
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* The Current Measurement register stores the measured |
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* current value delivered to the portable device. The range |
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* is from 9.76 mA to 2.5 A. |
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*/ |
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static const int bit_weights_uA[BITS_PER_TYPE(u8)] = { |
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9760, 19500, 39000, 78100, 156200, 312300, 624600, 1249300, |
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}; |
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unsigned long current_measurement; |
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unsigned int reg; |
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int i, ret; |
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ret = regmap_read(info->regmap, UCS1002_REG_CURRENT_MEASUREMENT, ®); |
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if (ret) |
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return ret; |
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current_measurement = reg; |
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val->intval = 0; |
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for_each_set_bit(i, ¤t_measurement, ARRAY_SIZE(bit_weights_uA)) |
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val->intval += bit_weights_uA[i]; |
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return 0; |
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} |
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/* |
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* The Current Limit register stores the maximum current used by the |
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* port switch. The range is from 500mA to 2.5 A. |
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*/ |
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static const u32 ucs1002_current_limit_uA[] = { |
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500000, 900000, 1000000, 1200000, 1500000, 1800000, 2000000, 2500000, |
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}; |
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static int ucs1002_get_max_current(struct ucs1002_info *info, |
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union power_supply_propval *val) |
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{ |
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unsigned int reg; |
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int ret; |
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if (info->output_disable) { |
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val->intval = 0; |
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return 0; |
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} |
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ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®); |
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if (ret) |
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return ret; |
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val->intval = ucs1002_current_limit_uA[reg & UCS1002_ILIM_SW_MASK]; |
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return 0; |
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} |
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static int ucs1002_set_max_current(struct ucs1002_info *info, u32 val) |
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{ |
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unsigned int reg; |
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int ret, idx; |
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if (val == 0) { |
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info->output_disable = true; |
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regulator_disable_regmap(info->rdev); |
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return 0; |
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} |
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for (idx = 0; idx < ARRAY_SIZE(ucs1002_current_limit_uA); idx++) { |
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if (val == ucs1002_current_limit_uA[idx]) |
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break; |
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} |
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if (idx == ARRAY_SIZE(ucs1002_current_limit_uA)) |
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return -EINVAL; |
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ret = regmap_write(info->regmap, UCS1002_REG_ILIMIT, idx); |
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if (ret) |
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return ret; |
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/* |
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* Any current limit setting exceeding the one set via ILIM |
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* pin will be rejected, so we read out freshly changed limit |
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* to make sure that it took effect. |
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*/ |
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ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®); |
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if (ret) |
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return ret; |
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if (reg != idx) |
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return -EINVAL; |
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info->output_disable = false; |
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if (info->rdev && info->rdev->use_count && |
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!regulator_is_enabled_regmap(info->rdev)) |
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regulator_enable_regmap(info->rdev); |
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return 0; |
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} |
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static enum power_supply_usb_type ucs1002_usb_types[] = { |
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POWER_SUPPLY_USB_TYPE_PD, |
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POWER_SUPPLY_USB_TYPE_SDP, |
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POWER_SUPPLY_USB_TYPE_DCP, |
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POWER_SUPPLY_USB_TYPE_CDP, |
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POWER_SUPPLY_USB_TYPE_UNKNOWN, |
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}; |
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static int ucs1002_set_usb_type(struct ucs1002_info *info, int val) |
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{ |
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unsigned int mode; |
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if (val < 0 || val >= ARRAY_SIZE(ucs1002_usb_types)) |
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return -EINVAL; |
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switch (ucs1002_usb_types[val]) { |
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case POWER_SUPPLY_USB_TYPE_PD: |
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mode = V_SET_ACTIVE_MODE_DEDICATED; |
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break; |
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case POWER_SUPPLY_USB_TYPE_SDP: |
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mode = V_SET_ACTIVE_MODE_BC12_SDP; |
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break; |
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case POWER_SUPPLY_USB_TYPE_DCP: |
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mode = V_SET_ACTIVE_MODE_BC12_DCP; |
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break; |
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case POWER_SUPPLY_USB_TYPE_CDP: |
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mode = V_SET_ACTIVE_MODE_BC12_CDP; |
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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 regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG, |
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V_SET_ACTIVE_MODE_MASK, mode); |
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} |
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static int ucs1002_get_usb_type(struct ucs1002_info *info, |
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union power_supply_propval *val) |
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{ |
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enum power_supply_usb_type type; |
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unsigned int reg; |
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int ret; |
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ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®); |
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if (ret) |
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return ret; |
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switch (reg & F_ACTIVE_MODE_MASK) { |
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default: |
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type = POWER_SUPPLY_USB_TYPE_UNKNOWN; |
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break; |
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case F_ACTIVE_MODE_DEDICATED: |
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type = POWER_SUPPLY_USB_TYPE_PD; |
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break; |
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case F_ACTIVE_MODE_BC12_SDP: |
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type = POWER_SUPPLY_USB_TYPE_SDP; |
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break; |
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case F_ACTIVE_MODE_BC12_DCP: |
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type = POWER_SUPPLY_USB_TYPE_DCP; |
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break; |
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case F_ACTIVE_MODE_BC12_CDP: |
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type = POWER_SUPPLY_USB_TYPE_CDP; |
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break; |
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} |
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val->intval = type; |
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return 0; |
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} |
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static int ucs1002_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 ucs1002_info *info = power_supply_get_drvdata(psy); |
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switch (psp) { |
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case POWER_SUPPLY_PROP_ONLINE: |
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return ucs1002_get_online(info, val); |
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case POWER_SUPPLY_PROP_CHARGE_NOW: |
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return ucs1002_get_charge(info, val); |
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case POWER_SUPPLY_PROP_CURRENT_NOW: |
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return ucs1002_get_current(info, val); |
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case POWER_SUPPLY_PROP_CURRENT_MAX: |
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return ucs1002_get_max_current(info, val); |
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case POWER_SUPPLY_PROP_USB_TYPE: |
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return ucs1002_get_usb_type(info, val); |
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case POWER_SUPPLY_PROP_HEALTH: |
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return val->intval = info->health; |
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case POWER_SUPPLY_PROP_PRESENT: |
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val->intval = info->present; |
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return 0; |
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case POWER_SUPPLY_PROP_MANUFACTURER: |
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val->strval = UCS1002_MANUFACTURER; |
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return 0; |
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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 ucs1002_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 ucs1002_info *info = power_supply_get_drvdata(psy); |
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switch (psp) { |
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case POWER_SUPPLY_PROP_CURRENT_MAX: |
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return ucs1002_set_max_current(info, val->intval); |
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case POWER_SUPPLY_PROP_USB_TYPE: |
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return ucs1002_set_usb_type(info, val->intval); |
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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 ucs1002_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_CURRENT_MAX: |
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case POWER_SUPPLY_PROP_USB_TYPE: |
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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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static const struct power_supply_desc ucs1002_charger_desc = { |
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.name = "ucs1002", |
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.type = POWER_SUPPLY_TYPE_USB, |
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.usb_types = ucs1002_usb_types, |
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.num_usb_types = ARRAY_SIZE(ucs1002_usb_types), |
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.get_property = ucs1002_get_property, |
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.set_property = ucs1002_set_property, |
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.property_is_writeable = ucs1002_property_is_writeable, |
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.properties = ucs1002_props, |
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.num_properties = ARRAY_SIZE(ucs1002_props), |
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}; |
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static void ucs1002_health_poll(struct work_struct *work) |
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{ |
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struct ucs1002_info *info = container_of(work, struct ucs1002_info, |
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health_poll.work); |
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int ret; |
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u32 reg; |
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ret = regmap_read(info->regmap, UCS1002_REG_INTERRUPT_STATUS, ®); |
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if (ret) |
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return; |
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/* bad health and no status change, just schedule us again in a while */ |
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if ((reg & F_ERR) && info->health != POWER_SUPPLY_HEALTH_GOOD) { |
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schedule_delayed_work(&info->health_poll, |
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msecs_to_jiffies(2000)); |
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return; |
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} |
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if (reg & F_TSD) |
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info->health = POWER_SUPPLY_HEALTH_OVERHEAT; |
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else if (reg & (F_OVER_VOLT | F_BACK_VOLT)) |
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info->health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
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else if (reg & F_OVER_ILIM) |
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info->health = POWER_SUPPLY_HEALTH_OVERCURRENT; |
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else if (reg & (F_DISCHARGE_ERR | F_MIN_KEEP_OUT)) |
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info->health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
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else |
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info->health = POWER_SUPPLY_HEALTH_GOOD; |
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sysfs_notify(&info->charger->dev.kobj, NULL, "health"); |
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} |
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static irqreturn_t ucs1002_charger_irq(int irq, void *data) |
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{ |
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int ret, regval; |
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bool present; |
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struct ucs1002_info *info = data; |
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present = info->present; |
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ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®val); |
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if (ret) |
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return IRQ_HANDLED; |
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/* update attached status */ |
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info->present = regval & F_ADET_PIN; |
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/* notify the change */ |
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if (present != info->present) |
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power_supply_changed(info->charger); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t ucs1002_alert_irq(int irq, void *data) |
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{ |
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struct ucs1002_info *info = data; |
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mod_delayed_work(system_wq, &info->health_poll, 0); |
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return IRQ_HANDLED; |
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} |
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static int ucs1002_regulator_enable(struct regulator_dev *rdev) |
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{ |
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struct ucs1002_info *info = rdev_get_drvdata(rdev); |
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|
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/* |
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* If the output is disabled due to 0 maximum current, just pretend the |
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* enable did work. The regulator will be enabled as soon as we get a |
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* a non-zero maximum current budget. |
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*/ |
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if (info->output_disable) |
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return 0; |
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return regulator_enable_regmap(rdev); |
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} |
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static const struct regulator_ops ucs1002_regulator_ops = { |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = ucs1002_regulator_enable, |
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.disable = regulator_disable_regmap, |
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}; |
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static const struct regulator_desc ucs1002_regulator_descriptor = { |
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.name = "ucs1002-vbus", |
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.ops = &ucs1002_regulator_ops, |
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.type = REGULATOR_VOLTAGE, |
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.owner = THIS_MODULE, |
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.enable_reg = UCS1002_REG_SWITCH_CFG, |
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.enable_mask = F_PWR_EN_SET, |
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.enable_val = F_PWR_EN_SET, |
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.fixed_uV = 5000000, |
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.n_voltages = 1, |
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}; |
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|
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static int ucs1002_probe(struct i2c_client *client, |
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const struct i2c_device_id *dev_id) |
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{ |
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struct device *dev = &client->dev; |
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struct power_supply_config charger_config = {}; |
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const struct regmap_config regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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}; |
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struct regulator_config regulator_config = {}; |
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int irq_a_det, irq_alert, ret; |
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struct ucs1002_info *info; |
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unsigned int regval; |
|
|
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info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); |
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if (!info) |
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return -ENOMEM; |
|
|
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info->regmap = devm_regmap_init_i2c(client, ®map_config); |
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ret = PTR_ERR_OR_ZERO(info->regmap); |
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if (ret) { |
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dev_err(dev, "Regmap initialization failed: %d\n", ret); |
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return ret; |
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} |
|
|
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info->client = client; |
|
|
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irq_a_det = of_irq_get_byname(dev->of_node, "a_det"); |
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irq_alert = of_irq_get_byname(dev->of_node, "alert"); |
|
|
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charger_config.of_node = dev->of_node; |
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charger_config.drv_data = info; |
|
|
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ret = regmap_read(info->regmap, UCS1002_REG_PRODUCT_ID, ®val); |
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if (ret) { |
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dev_err(dev, "Failed to read product ID: %d\n", ret); |
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return ret; |
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} |
|
|
|
if (regval != UCS1002_PRODUCT_ID) { |
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dev_err(dev, |
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"Product ID does not match (0x%02x != 0x%02x)\n", |
|
regval, UCS1002_PRODUCT_ID); |
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return -ENODEV; |
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} |
|
|
|
/* Enable charge rationing by default */ |
|
ret = regmap_update_bits(info->regmap, UCS1002_REG_GENERAL_CFG, |
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F_RATION_EN, F_RATION_EN); |
|
if (ret) { |
|
dev_err(dev, "Failed to read general config: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
/* |
|
* Ignore the M1, M2, PWR_EN, and EM_EN pin states. Set active |
|
* mode selection to BC1.2 CDP. |
|
*/ |
|
ret = regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG, |
|
V_SET_ACTIVE_MODE_MASK | F_PIN_IGNORE, |
|
V_SET_ACTIVE_MODE_BC12_CDP | F_PIN_IGNORE); |
|
if (ret) { |
|
dev_err(dev, "Failed to configure default mode: %d\n", ret); |
|
return ret; |
|
} |
|
/* |
|
* Be safe and set initial current limit to 500mA |
|
*/ |
|
ret = ucs1002_set_max_current(info, 500000); |
|
if (ret) { |
|
dev_err(dev, "Failed to set max current default: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
info->charger = devm_power_supply_register(dev, &ucs1002_charger_desc, |
|
&charger_config); |
|
ret = PTR_ERR_OR_ZERO(info->charger); |
|
if (ret) { |
|
dev_err(dev, "Failed to register power supply: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®val); |
|
if (ret) { |
|
dev_err(dev, "Failed to read pin status: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
info->regulator_descriptor = |
|
devm_kmemdup(dev, &ucs1002_regulator_descriptor, |
|
sizeof(ucs1002_regulator_descriptor), |
|
GFP_KERNEL); |
|
if (!info->regulator_descriptor) |
|
return -ENOMEM; |
|
|
|
info->regulator_descriptor->enable_is_inverted = !(regval & F_SEL_PIN); |
|
|
|
regulator_config.dev = dev; |
|
regulator_config.of_node = dev->of_node; |
|
regulator_config.regmap = info->regmap; |
|
regulator_config.driver_data = info; |
|
|
|
info->rdev = devm_regulator_register(dev, info->regulator_descriptor, |
|
®ulator_config); |
|
ret = PTR_ERR_OR_ZERO(info->rdev); |
|
if (ret) { |
|
dev_err(dev, "Failed to register VBUS regulator: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
info->health = POWER_SUPPLY_HEALTH_GOOD; |
|
INIT_DELAYED_WORK(&info->health_poll, ucs1002_health_poll); |
|
|
|
if (irq_a_det > 0) { |
|
ret = devm_request_threaded_irq(dev, irq_a_det, NULL, |
|
ucs1002_charger_irq, |
|
IRQF_ONESHOT, |
|
"ucs1002-a_det", info); |
|
if (ret) { |
|
dev_err(dev, "Failed to request A_DET threaded irq: %d\n", |
|
ret); |
|
return ret; |
|
} |
|
} |
|
|
|
if (irq_alert > 0) { |
|
ret = devm_request_irq(dev, irq_alert, ucs1002_alert_irq, |
|
0,"ucs1002-alert", info); |
|
if (ret) { |
|
dev_err(dev, "Failed to request ALERT threaded irq: %d\n", |
|
ret); |
|
return ret; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct of_device_id ucs1002_of_match[] = { |
|
{ .compatible = "microchip,ucs1002", }, |
|
{ /* sentinel */ }, |
|
}; |
|
MODULE_DEVICE_TABLE(of, ucs1002_of_match); |
|
|
|
static struct i2c_driver ucs1002_driver = { |
|
.driver = { |
|
.name = "ucs1002", |
|
.of_match_table = ucs1002_of_match, |
|
}, |
|
.probe = ucs1002_probe, |
|
}; |
|
module_i2c_driver(ucs1002_driver); |
|
|
|
MODULE_DESCRIPTION("Microchip UCS1002 Programmable USB Port Power Controller"); |
|
MODULE_AUTHOR("Enric Balletbo Serra <[email protected]>"); |
|
MODULE_AUTHOR("Andrey Smirnov <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|