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1791 lines
46 KiB
1791 lines
46 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* bq2415x charger driver |
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* |
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* Copyright (C) 2011-2013 Pali Rohár <[email protected]> |
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* |
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* Datasheets: |
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* https://www.ti.com/product/bq24150 |
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* https://www.ti.com/product/bq24150a |
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* https://www.ti.com/product/bq24152 |
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* https://www.ti.com/product/bq24153 |
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* https://www.ti.com/product/bq24153a |
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* https://www.ti.com/product/bq24155 |
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* https://www.ti.com/product/bq24157s |
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* https://www.ti.com/product/bq24158 |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/param.h> |
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#include <linux/err.h> |
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#include <linux/workqueue.h> |
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#include <linux/sysfs.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/idr.h> |
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#include <linux/i2c.h> |
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#include <linux/slab.h> |
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#include <linux/acpi.h> |
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|
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#include <linux/power/bq2415x_charger.h> |
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|
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/* timeout for resetting chip timer */ |
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#define BQ2415X_TIMER_TIMEOUT 10 |
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|
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#define BQ2415X_REG_STATUS 0x00 |
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#define BQ2415X_REG_CONTROL 0x01 |
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#define BQ2415X_REG_VOLTAGE 0x02 |
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#define BQ2415X_REG_VENDER 0x03 |
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#define BQ2415X_REG_CURRENT 0x04 |
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|
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/* reset state for all registers */ |
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#define BQ2415X_RESET_STATUS BIT(6) |
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#define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5)) |
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#define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3)) |
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#define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7)) |
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|
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/* status register */ |
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#define BQ2415X_BIT_TMR_RST 7 |
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#define BQ2415X_BIT_OTG 7 |
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#define BQ2415X_BIT_EN_STAT 6 |
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#define BQ2415X_MASK_STAT (BIT(4)|BIT(5)) |
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#define BQ2415X_SHIFT_STAT 4 |
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#define BQ2415X_BIT_BOOST 3 |
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#define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2)) |
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#define BQ2415X_SHIFT_FAULT 0 |
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|
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/* control register */ |
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#define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7)) |
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#define BQ2415X_SHIFT_LIMIT 6 |
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#define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5)) |
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#define BQ2415X_SHIFT_VLOWV 4 |
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#define BQ2415X_BIT_TE 3 |
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#define BQ2415X_BIT_CE 2 |
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#define BQ2415X_BIT_HZ_MODE 1 |
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#define BQ2415X_BIT_OPA_MODE 0 |
|
|
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/* voltage register */ |
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#define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7)) |
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#define BQ2415X_SHIFT_VO 2 |
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#define BQ2415X_BIT_OTG_PL 1 |
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#define BQ2415X_BIT_OTG_EN 0 |
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|
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/* vender register */ |
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#define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7)) |
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#define BQ2415X_SHIFT_VENDER 5 |
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#define BQ2415X_MASK_PN (BIT(3)|BIT(4)) |
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#define BQ2415X_SHIFT_PN 3 |
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#define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2)) |
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#define BQ2415X_SHIFT_REVISION 0 |
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|
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/* current register */ |
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#define BQ2415X_MASK_RESET BIT(7) |
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#define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6)) |
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#define BQ2415X_SHIFT_VI_CHRG 4 |
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/* N/A BIT(3) */ |
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#define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2)) |
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#define BQ2415X_SHIFT_VI_TERM 0 |
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|
|
|
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enum bq2415x_command { |
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BQ2415X_TIMER_RESET, |
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BQ2415X_OTG_STATUS, |
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BQ2415X_STAT_PIN_STATUS, |
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BQ2415X_STAT_PIN_ENABLE, |
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BQ2415X_STAT_PIN_DISABLE, |
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BQ2415X_CHARGE_STATUS, |
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BQ2415X_BOOST_STATUS, |
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BQ2415X_FAULT_STATUS, |
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|
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BQ2415X_CHARGE_TERMINATION_STATUS, |
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BQ2415X_CHARGE_TERMINATION_ENABLE, |
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BQ2415X_CHARGE_TERMINATION_DISABLE, |
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BQ2415X_CHARGER_STATUS, |
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BQ2415X_CHARGER_ENABLE, |
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BQ2415X_CHARGER_DISABLE, |
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BQ2415X_HIGH_IMPEDANCE_STATUS, |
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BQ2415X_HIGH_IMPEDANCE_ENABLE, |
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BQ2415X_HIGH_IMPEDANCE_DISABLE, |
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BQ2415X_BOOST_MODE_STATUS, |
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BQ2415X_BOOST_MODE_ENABLE, |
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BQ2415X_BOOST_MODE_DISABLE, |
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BQ2415X_OTG_LEVEL, |
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BQ2415X_OTG_ACTIVATE_HIGH, |
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BQ2415X_OTG_ACTIVATE_LOW, |
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BQ2415X_OTG_PIN_STATUS, |
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BQ2415X_OTG_PIN_ENABLE, |
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BQ2415X_OTG_PIN_DISABLE, |
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|
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BQ2415X_VENDER_CODE, |
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BQ2415X_PART_NUMBER, |
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BQ2415X_REVISION, |
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}; |
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|
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enum bq2415x_chip { |
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BQUNKNOWN, |
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BQ24150, |
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BQ24150A, |
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BQ24151, |
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BQ24151A, |
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BQ24152, |
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BQ24153, |
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BQ24153A, |
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BQ24155, |
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BQ24156, |
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BQ24156A, |
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BQ24157S, |
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BQ24158, |
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}; |
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|
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static char *bq2415x_chip_name[] = { |
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"unknown", |
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"bq24150", |
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"bq24150a", |
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"bq24151", |
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"bq24151a", |
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"bq24152", |
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"bq24153", |
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"bq24153a", |
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"bq24155", |
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"bq24156", |
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"bq24156a", |
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"bq24157s", |
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"bq24158", |
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}; |
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|
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struct bq2415x_device { |
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struct device *dev; |
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struct bq2415x_platform_data init_data; |
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struct power_supply *charger; |
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struct power_supply_desc charger_desc; |
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struct delayed_work work; |
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struct device_node *notify_node; |
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struct notifier_block nb; |
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enum bq2415x_mode reported_mode;/* mode reported by hook function */ |
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enum bq2415x_mode mode; /* currently configured mode */ |
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enum bq2415x_chip chip; |
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const char *timer_error; |
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char *model; |
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char *name; |
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int autotimer; /* 1 - if driver automatically reset timer, 0 - not */ |
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int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */ |
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int id; |
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}; |
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|
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/* each registered chip must have unique id */ |
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static DEFINE_IDR(bq2415x_id); |
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|
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static DEFINE_MUTEX(bq2415x_id_mutex); |
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static DEFINE_MUTEX(bq2415x_timer_mutex); |
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static DEFINE_MUTEX(bq2415x_i2c_mutex); |
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|
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/**** i2c read functions ****/ |
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|
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/* read value from register */ |
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static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg) |
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{ |
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struct i2c_client *client = to_i2c_client(bq->dev); |
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struct i2c_msg msg[2]; |
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u8 val; |
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int ret; |
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|
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if (!client->adapter) |
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return -ENODEV; |
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|
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msg[0].addr = client->addr; |
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msg[0].flags = 0; |
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msg[0].buf = ® |
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msg[0].len = sizeof(reg); |
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msg[1].addr = client->addr; |
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msg[1].flags = I2C_M_RD; |
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msg[1].buf = &val; |
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msg[1].len = sizeof(val); |
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mutex_lock(&bq2415x_i2c_mutex); |
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ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); |
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mutex_unlock(&bq2415x_i2c_mutex); |
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if (ret < 0) |
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return ret; |
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|
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return val; |
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} |
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|
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/* read value from register, apply mask and right shift it */ |
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static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg, |
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u8 mask, u8 shift) |
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{ |
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int ret; |
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|
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if (shift > 8) |
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return -EINVAL; |
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|
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ret = bq2415x_i2c_read(bq, reg); |
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if (ret < 0) |
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return ret; |
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return (ret & mask) >> shift; |
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} |
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|
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/* read value from register and return one specified bit */ |
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static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit) |
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{ |
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if (bit > 8) |
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return -EINVAL; |
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return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit); |
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} |
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|
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/**** i2c write functions ****/ |
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|
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/* write value to register */ |
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static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val) |
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{ |
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struct i2c_client *client = to_i2c_client(bq->dev); |
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struct i2c_msg msg[1]; |
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u8 data[2]; |
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int ret; |
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|
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data[0] = reg; |
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data[1] = val; |
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msg[0].addr = client->addr; |
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msg[0].flags = 0; |
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msg[0].buf = data; |
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msg[0].len = ARRAY_SIZE(data); |
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|
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mutex_lock(&bq2415x_i2c_mutex); |
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ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); |
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mutex_unlock(&bq2415x_i2c_mutex); |
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|
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/* i2c_transfer returns number of messages transferred */ |
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if (ret < 0) |
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return ret; |
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else if (ret != 1) |
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return -EIO; |
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|
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return 0; |
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} |
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|
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/* read value from register, change it with mask left shifted and write back */ |
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static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val, |
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u8 mask, u8 shift) |
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{ |
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int ret; |
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|
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if (shift > 8) |
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return -EINVAL; |
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ret = bq2415x_i2c_read(bq, reg); |
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if (ret < 0) |
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return ret; |
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ret &= ~mask; |
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ret |= val << shift; |
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return bq2415x_i2c_write(bq, reg, ret); |
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} |
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|
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/* change only one bit in register */ |
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static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg, |
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bool val, u8 bit) |
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{ |
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if (bit > 8) |
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return -EINVAL; |
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return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit); |
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} |
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|
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/**** global functions ****/ |
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|
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/* exec command function */ |
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static int bq2415x_exec_command(struct bq2415x_device *bq, |
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enum bq2415x_command command) |
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{ |
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int ret; |
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|
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switch (command) { |
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case BQ2415X_TIMER_RESET: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, |
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1, BQ2415X_BIT_TMR_RST); |
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case BQ2415X_OTG_STATUS: |
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, |
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BQ2415X_BIT_OTG); |
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case BQ2415X_STAT_PIN_STATUS: |
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, |
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BQ2415X_BIT_EN_STAT); |
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case BQ2415X_STAT_PIN_ENABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1, |
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BQ2415X_BIT_EN_STAT); |
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case BQ2415X_STAT_PIN_DISABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0, |
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BQ2415X_BIT_EN_STAT); |
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case BQ2415X_CHARGE_STATUS: |
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, |
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BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT); |
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case BQ2415X_BOOST_STATUS: |
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, |
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BQ2415X_BIT_BOOST); |
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case BQ2415X_FAULT_STATUS: |
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, |
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BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT); |
|
|
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case BQ2415X_CHARGE_TERMINATION_STATUS: |
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, |
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BQ2415X_BIT_TE); |
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case BQ2415X_CHARGE_TERMINATION_ENABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
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1, BQ2415X_BIT_TE); |
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case BQ2415X_CHARGE_TERMINATION_DISABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
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0, BQ2415X_BIT_TE); |
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case BQ2415X_CHARGER_STATUS: |
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ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, |
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BQ2415X_BIT_CE); |
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if (ret < 0) |
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return ret; |
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return ret > 0 ? 0 : 1; |
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case BQ2415X_CHARGER_ENABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
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0, BQ2415X_BIT_CE); |
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case BQ2415X_CHARGER_DISABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
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1, BQ2415X_BIT_CE); |
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case BQ2415X_HIGH_IMPEDANCE_STATUS: |
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, |
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BQ2415X_BIT_HZ_MODE); |
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case BQ2415X_HIGH_IMPEDANCE_ENABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
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1, BQ2415X_BIT_HZ_MODE); |
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case BQ2415X_HIGH_IMPEDANCE_DISABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
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0, BQ2415X_BIT_HZ_MODE); |
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case BQ2415X_BOOST_MODE_STATUS: |
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, |
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BQ2415X_BIT_OPA_MODE); |
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case BQ2415X_BOOST_MODE_ENABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
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1, BQ2415X_BIT_OPA_MODE); |
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case BQ2415X_BOOST_MODE_DISABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
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0, BQ2415X_BIT_OPA_MODE); |
|
|
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case BQ2415X_OTG_LEVEL: |
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, |
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BQ2415X_BIT_OTG_PL); |
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case BQ2415X_OTG_ACTIVATE_HIGH: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, |
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1, BQ2415X_BIT_OTG_PL); |
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case BQ2415X_OTG_ACTIVATE_LOW: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, |
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0, BQ2415X_BIT_OTG_PL); |
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case BQ2415X_OTG_PIN_STATUS: |
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return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, |
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BQ2415X_BIT_OTG_EN); |
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case BQ2415X_OTG_PIN_ENABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, |
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1, BQ2415X_BIT_OTG_EN); |
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case BQ2415X_OTG_PIN_DISABLE: |
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return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, |
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0, BQ2415X_BIT_OTG_EN); |
|
|
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case BQ2415X_VENDER_CODE: |
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, |
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BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER); |
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case BQ2415X_PART_NUMBER: |
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, |
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BQ2415X_MASK_PN, BQ2415X_SHIFT_PN); |
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case BQ2415X_REVISION: |
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return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, |
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BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION); |
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} |
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return -EINVAL; |
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} |
|
|
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/* detect chip type */ |
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static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq) |
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{ |
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struct i2c_client *client = to_i2c_client(bq->dev); |
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int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER); |
|
|
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if (ret < 0) |
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return ret; |
|
|
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switch (client->addr) { |
|
case 0x6b: |
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switch (ret) { |
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case 0: |
|
if (bq->chip == BQ24151A) |
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return bq->chip; |
|
return BQ24151; |
|
case 1: |
|
if (bq->chip == BQ24150A || |
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bq->chip == BQ24152 || |
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bq->chip == BQ24155) |
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return bq->chip; |
|
return BQ24150; |
|
case 2: |
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if (bq->chip == BQ24153A) |
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return bq->chip; |
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return BQ24153; |
|
default: |
|
return BQUNKNOWN; |
|
} |
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break; |
|
|
|
case 0x6a: |
|
switch (ret) { |
|
case 0: |
|
if (bq->chip == BQ24156A) |
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return bq->chip; |
|
return BQ24156; |
|
case 2: |
|
if (bq->chip == BQ24157S) |
|
return bq->chip; |
|
return BQ24158; |
|
default: |
|
return BQUNKNOWN; |
|
} |
|
break; |
|
} |
|
|
|
return BQUNKNOWN; |
|
} |
|
|
|
/* detect chip revision */ |
|
static int bq2415x_detect_revision(struct bq2415x_device *bq) |
|
{ |
|
int ret = bq2415x_exec_command(bq, BQ2415X_REVISION); |
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int chip = bq2415x_detect_chip(bq); |
|
|
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if (ret < 0 || chip < 0) |
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return -1; |
|
|
|
switch (chip) { |
|
case BQ24150: |
|
case BQ24150A: |
|
case BQ24151: |
|
case BQ24151A: |
|
case BQ24152: |
|
if (ret >= 0 && ret <= 3) |
|
return ret; |
|
return -1; |
|
case BQ24153: |
|
case BQ24153A: |
|
case BQ24156: |
|
case BQ24156A: |
|
case BQ24157S: |
|
case BQ24158: |
|
if (ret == 3) |
|
return 0; |
|
else if (ret == 1) |
|
return 1; |
|
return -1; |
|
case BQ24155: |
|
if (ret == 3) |
|
return 3; |
|
return -1; |
|
case BQUNKNOWN: |
|
return -1; |
|
} |
|
|
|
return -1; |
|
} |
|
|
|
/* return chip vender code */ |
|
static int bq2415x_get_vender_code(struct bq2415x_device *bq) |
|
{ |
|
int ret; |
|
|
|
ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE); |
|
if (ret < 0) |
|
return 0; |
|
|
|
/* convert to binary */ |
|
return (ret & 0x1) + |
|
((ret >> 1) & 0x1) * 10 + |
|
((ret >> 2) & 0x1) * 100; |
|
} |
|
|
|
/* reset all chip registers to default state */ |
|
static void bq2415x_reset_chip(struct bq2415x_device *bq) |
|
{ |
|
bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT); |
|
bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE); |
|
bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL); |
|
bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS); |
|
bq->timer_error = NULL; |
|
} |
|
|
|
/**** properties functions ****/ |
|
|
|
/* set current limit in mA */ |
|
static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA) |
|
{ |
|
int val; |
|
|
|
if (mA <= 100) |
|
val = 0; |
|
else if (mA <= 500) |
|
val = 1; |
|
else if (mA <= 800) |
|
val = 2; |
|
else |
|
val = 3; |
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, |
|
BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT); |
|
} |
|
|
|
/* get current limit in mA */ |
|
static int bq2415x_get_current_limit(struct bq2415x_device *bq) |
|
{ |
|
int ret; |
|
|
|
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, |
|
BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT); |
|
if (ret < 0) |
|
return ret; |
|
else if (ret == 0) |
|
return 100; |
|
else if (ret == 1) |
|
return 500; |
|
else if (ret == 2) |
|
return 800; |
|
else if (ret == 3) |
|
return 1800; |
|
return -EINVAL; |
|
} |
|
|
|
/* set weak battery voltage in mV */ |
|
static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV) |
|
{ |
|
int val; |
|
|
|
/* round to 100mV */ |
|
if (mV <= 3400 + 50) |
|
val = 0; |
|
else if (mV <= 3500 + 50) |
|
val = 1; |
|
else if (mV <= 3600 + 50) |
|
val = 2; |
|
else |
|
val = 3; |
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, |
|
BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV); |
|
} |
|
|
|
/* get weak battery voltage in mV */ |
|
static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq) |
|
{ |
|
int ret; |
|
|
|
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, |
|
BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV); |
|
if (ret < 0) |
|
return ret; |
|
return 100 * (34 + ret); |
|
} |
|
|
|
/* set battery regulation voltage in mV */ |
|
static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq, |
|
int mV) |
|
{ |
|
int val = (mV/10 - 350) / 2; |
|
|
|
/* |
|
* According to datasheet, maximum battery regulation voltage is |
|
* 4440mV which is b101111 = 47. |
|
*/ |
|
if (val < 0) |
|
val = 0; |
|
else if (val > 47) |
|
return -EINVAL; |
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val, |
|
BQ2415X_MASK_VO, BQ2415X_SHIFT_VO); |
|
} |
|
|
|
/* get battery regulation voltage in mV */ |
|
static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq) |
|
{ |
|
int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE, |
|
BQ2415X_MASK_VO, BQ2415X_SHIFT_VO); |
|
|
|
if (ret < 0) |
|
return ret; |
|
return 10 * (350 + 2*ret); |
|
} |
|
|
|
/* set charge current in mA (platform data must provide resistor sense) */ |
|
static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA) |
|
{ |
|
int val; |
|
|
|
if (bq->init_data.resistor_sense <= 0) |
|
return -EINVAL; |
|
|
|
val = (mA * bq->init_data.resistor_sense - 37400) / 6800; |
|
if (val < 0) |
|
val = 0; |
|
else if (val > 7) |
|
val = 7; |
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val, |
|
BQ2415X_MASK_VI_CHRG | BQ2415X_MASK_RESET, |
|
BQ2415X_SHIFT_VI_CHRG); |
|
} |
|
|
|
/* get charge current in mA (platform data must provide resistor sense) */ |
|
static int bq2415x_get_charge_current(struct bq2415x_device *bq) |
|
{ |
|
int ret; |
|
|
|
if (bq->init_data.resistor_sense <= 0) |
|
return -EINVAL; |
|
|
|
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT, |
|
BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG); |
|
if (ret < 0) |
|
return ret; |
|
return (37400 + 6800*ret) / bq->init_data.resistor_sense; |
|
} |
|
|
|
/* set termination current in mA (platform data must provide resistor sense) */ |
|
static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA) |
|
{ |
|
int val; |
|
|
|
if (bq->init_data.resistor_sense <= 0) |
|
return -EINVAL; |
|
|
|
val = (mA * bq->init_data.resistor_sense - 3400) / 3400; |
|
if (val < 0) |
|
val = 0; |
|
else if (val > 7) |
|
val = 7; |
|
|
|
return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val, |
|
BQ2415X_MASK_VI_TERM | BQ2415X_MASK_RESET, |
|
BQ2415X_SHIFT_VI_TERM); |
|
} |
|
|
|
/* get termination current in mA (platform data must provide resistor sense) */ |
|
static int bq2415x_get_termination_current(struct bq2415x_device *bq) |
|
{ |
|
int ret; |
|
|
|
if (bq->init_data.resistor_sense <= 0) |
|
return -EINVAL; |
|
|
|
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT, |
|
BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM); |
|
if (ret < 0) |
|
return ret; |
|
return (3400 + 3400*ret) / bq->init_data.resistor_sense; |
|
} |
|
|
|
/* set default value of property */ |
|
#define bq2415x_set_default_value(bq, prop) \ |
|
do { \ |
|
int ret = 0; \ |
|
if (bq->init_data.prop != -1) \ |
|
ret = bq2415x_set_##prop(bq, bq->init_data.prop); \ |
|
if (ret < 0) \ |
|
return ret; \ |
|
} while (0) |
|
|
|
/* set default values of all properties */ |
|
static int bq2415x_set_defaults(struct bq2415x_device *bq) |
|
{ |
|
bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE); |
|
bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE); |
|
bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_DISABLE); |
|
|
|
bq2415x_set_default_value(bq, current_limit); |
|
bq2415x_set_default_value(bq, weak_battery_voltage); |
|
bq2415x_set_default_value(bq, battery_regulation_voltage); |
|
|
|
if (bq->init_data.resistor_sense > 0) { |
|
bq2415x_set_default_value(bq, charge_current); |
|
bq2415x_set_default_value(bq, termination_current); |
|
bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE); |
|
} |
|
|
|
bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE); |
|
return 0; |
|
} |
|
|
|
/**** charger mode functions ****/ |
|
|
|
/* set charger mode */ |
|
static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode) |
|
{ |
|
int ret = 0; |
|
int charger = 0; |
|
int boost = 0; |
|
|
|
if (mode == BQ2415X_MODE_BOOST) |
|
boost = 1; |
|
else if (mode != BQ2415X_MODE_OFF) |
|
charger = 1; |
|
|
|
if (!charger) |
|
ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE); |
|
|
|
if (!boost) |
|
ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE); |
|
|
|
if (ret < 0) |
|
return ret; |
|
|
|
switch (mode) { |
|
case BQ2415X_MODE_OFF: |
|
dev_dbg(bq->dev, "changing mode to: Offline\n"); |
|
ret = bq2415x_set_current_limit(bq, 100); |
|
break; |
|
case BQ2415X_MODE_NONE: |
|
dev_dbg(bq->dev, "changing mode to: N/A\n"); |
|
ret = bq2415x_set_current_limit(bq, 100); |
|
break; |
|
case BQ2415X_MODE_HOST_CHARGER: |
|
dev_dbg(bq->dev, "changing mode to: Host/HUB charger\n"); |
|
ret = bq2415x_set_current_limit(bq, 500); |
|
break; |
|
case BQ2415X_MODE_DEDICATED_CHARGER: |
|
dev_dbg(bq->dev, "changing mode to: Dedicated charger\n"); |
|
ret = bq2415x_set_current_limit(bq, 1800); |
|
break; |
|
case BQ2415X_MODE_BOOST: /* Boost mode */ |
|
dev_dbg(bq->dev, "changing mode to: Boost\n"); |
|
ret = bq2415x_set_current_limit(bq, 100); |
|
break; |
|
} |
|
|
|
if (ret < 0) |
|
return ret; |
|
|
|
if (charger) |
|
ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE); |
|
else if (boost) |
|
ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE); |
|
|
|
if (ret < 0) |
|
return ret; |
|
|
|
bq2415x_set_default_value(bq, weak_battery_voltage); |
|
bq2415x_set_default_value(bq, battery_regulation_voltage); |
|
|
|
bq->mode = mode; |
|
sysfs_notify(&bq->charger->dev.kobj, NULL, "mode"); |
|
|
|
return 0; |
|
|
|
} |
|
|
|
static bool bq2415x_update_reported_mode(struct bq2415x_device *bq, int mA) |
|
{ |
|
enum bq2415x_mode mode; |
|
|
|
if (mA == 0) |
|
mode = BQ2415X_MODE_OFF; |
|
else if (mA < 500) |
|
mode = BQ2415X_MODE_NONE; |
|
else if (mA < 1800) |
|
mode = BQ2415X_MODE_HOST_CHARGER; |
|
else |
|
mode = BQ2415X_MODE_DEDICATED_CHARGER; |
|
|
|
if (bq->reported_mode == mode) |
|
return false; |
|
|
|
bq->reported_mode = mode; |
|
return true; |
|
} |
|
|
|
static int bq2415x_notifier_call(struct notifier_block *nb, |
|
unsigned long val, void *v) |
|
{ |
|
struct bq2415x_device *bq = |
|
container_of(nb, struct bq2415x_device, nb); |
|
struct power_supply *psy = v; |
|
union power_supply_propval prop; |
|
int ret; |
|
|
|
if (val != PSY_EVENT_PROP_CHANGED) |
|
return NOTIFY_OK; |
|
|
|
/* Ignore event if it was not send by notify_node/notify_device */ |
|
if (bq->notify_node) { |
|
if (!psy->dev.parent || |
|
psy->dev.parent->of_node != bq->notify_node) |
|
return NOTIFY_OK; |
|
} else if (bq->init_data.notify_device) { |
|
if (strcmp(psy->desc->name, bq->init_data.notify_device) != 0) |
|
return NOTIFY_OK; |
|
} |
|
|
|
dev_dbg(bq->dev, "notifier call was called\n"); |
|
|
|
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX, |
|
&prop); |
|
if (ret != 0) |
|
return NOTIFY_OK; |
|
|
|
if (!bq2415x_update_reported_mode(bq, prop.intval)) |
|
return NOTIFY_OK; |
|
|
|
/* if automode is not enabled do not tell about reported_mode */ |
|
if (bq->automode < 1) |
|
return NOTIFY_OK; |
|
|
|
schedule_delayed_work(&bq->work, 0); |
|
|
|
return NOTIFY_OK; |
|
} |
|
|
|
/**** timer functions ****/ |
|
|
|
/* enable/disable auto resetting chip timer */ |
|
static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state) |
|
{ |
|
mutex_lock(&bq2415x_timer_mutex); |
|
|
|
if (bq->autotimer == state) { |
|
mutex_unlock(&bq2415x_timer_mutex); |
|
return; |
|
} |
|
|
|
bq->autotimer = state; |
|
|
|
if (state) { |
|
schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ); |
|
bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); |
|
bq->timer_error = NULL; |
|
} else { |
|
cancel_delayed_work_sync(&bq->work); |
|
} |
|
|
|
mutex_unlock(&bq2415x_timer_mutex); |
|
} |
|
|
|
/* called by bq2415x_timer_work on timer error */ |
|
static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg) |
|
{ |
|
bq->timer_error = msg; |
|
sysfs_notify(&bq->charger->dev.kobj, NULL, "timer"); |
|
dev_err(bq->dev, "%s\n", msg); |
|
if (bq->automode > 0) |
|
bq->automode = 0; |
|
bq2415x_set_mode(bq, BQ2415X_MODE_OFF); |
|
bq2415x_set_autotimer(bq, 0); |
|
} |
|
|
|
/* delayed work function for auto resetting chip timer */ |
|
static void bq2415x_timer_work(struct work_struct *work) |
|
{ |
|
struct bq2415x_device *bq = container_of(work, struct bq2415x_device, |
|
work.work); |
|
int ret; |
|
int error; |
|
int boost; |
|
|
|
if (bq->automode > 0 && (bq->reported_mode != bq->mode)) { |
|
sysfs_notify(&bq->charger->dev.kobj, NULL, "reported_mode"); |
|
bq2415x_set_mode(bq, bq->reported_mode); |
|
} |
|
|
|
if (!bq->autotimer) |
|
return; |
|
|
|
ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); |
|
if (ret < 0) { |
|
bq2415x_timer_error(bq, "Resetting timer failed"); |
|
return; |
|
} |
|
|
|
boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS); |
|
if (boost < 0) { |
|
bq2415x_timer_error(bq, "Unknown error"); |
|
return; |
|
} |
|
|
|
error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS); |
|
if (error < 0) { |
|
bq2415x_timer_error(bq, "Unknown error"); |
|
return; |
|
} |
|
|
|
if (boost) { |
|
switch (error) { |
|
/* Non fatal errors, chip is OK */ |
|
case 0: /* No error */ |
|
break; |
|
case 6: /* Timer expired */ |
|
dev_err(bq->dev, "Timer expired\n"); |
|
break; |
|
case 3: /* Battery voltage too low */ |
|
dev_err(bq->dev, "Battery voltage to low\n"); |
|
break; |
|
|
|
/* Fatal errors, disable and reset chip */ |
|
case 1: /* Overvoltage protection (chip fried) */ |
|
bq2415x_timer_error(bq, |
|
"Overvoltage protection (chip fried)"); |
|
return; |
|
case 2: /* Overload */ |
|
bq2415x_timer_error(bq, "Overload"); |
|
return; |
|
case 4: /* Battery overvoltage protection */ |
|
bq2415x_timer_error(bq, |
|
"Battery overvoltage protection"); |
|
return; |
|
case 5: /* Thermal shutdown (too hot) */ |
|
bq2415x_timer_error(bq, |
|
"Thermal shutdown (too hot)"); |
|
return; |
|
case 7: /* N/A */ |
|
bq2415x_timer_error(bq, "Unknown error"); |
|
return; |
|
} |
|
} else { |
|
switch (error) { |
|
/* Non fatal errors, chip is OK */ |
|
case 0: /* No error */ |
|
break; |
|
case 2: /* Sleep mode */ |
|
dev_err(bq->dev, "Sleep mode\n"); |
|
break; |
|
case 3: /* Poor input source */ |
|
dev_err(bq->dev, "Poor input source\n"); |
|
break; |
|
case 6: /* Timer expired */ |
|
dev_err(bq->dev, "Timer expired\n"); |
|
break; |
|
case 7: /* No battery */ |
|
dev_err(bq->dev, "No battery\n"); |
|
break; |
|
|
|
/* Fatal errors, disable and reset chip */ |
|
case 1: /* Overvoltage protection (chip fried) */ |
|
bq2415x_timer_error(bq, |
|
"Overvoltage protection (chip fried)"); |
|
return; |
|
case 4: /* Battery overvoltage protection */ |
|
bq2415x_timer_error(bq, |
|
"Battery overvoltage protection"); |
|
return; |
|
case 5: /* Thermal shutdown (too hot) */ |
|
bq2415x_timer_error(bq, |
|
"Thermal shutdown (too hot)"); |
|
return; |
|
} |
|
} |
|
|
|
schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ); |
|
} |
|
|
|
/**** power supply interface code ****/ |
|
|
|
static enum power_supply_property bq2415x_power_supply_props[] = { |
|
/* TODO: maybe add more power supply properties */ |
|
POWER_SUPPLY_PROP_STATUS, |
|
POWER_SUPPLY_PROP_MODEL_NAME, |
|
}; |
|
|
|
static int bq2415x_power_supply_get_property(struct power_supply *psy, |
|
enum power_supply_property psp, |
|
union power_supply_propval *val) |
|
{ |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
int ret; |
|
|
|
switch (psp) { |
|
case POWER_SUPPLY_PROP_STATUS: |
|
ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS); |
|
if (ret < 0) |
|
return ret; |
|
else if (ret == 0) /* Ready */ |
|
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
|
else if (ret == 1) /* Charge in progress */ |
|
val->intval = POWER_SUPPLY_STATUS_CHARGING; |
|
else if (ret == 2) /* Charge done */ |
|
val->intval = POWER_SUPPLY_STATUS_FULL; |
|
else |
|
val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
|
break; |
|
case POWER_SUPPLY_PROP_MODEL_NAME: |
|
val->strval = bq->model; |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
return 0; |
|
} |
|
|
|
static void bq2415x_power_supply_exit(struct bq2415x_device *bq) |
|
{ |
|
bq->autotimer = 0; |
|
if (bq->automode > 0) |
|
bq->automode = 0; |
|
cancel_delayed_work_sync(&bq->work); |
|
power_supply_unregister(bq->charger); |
|
kfree(bq->model); |
|
} |
|
|
|
/**** additional sysfs entries for power supply interface ****/ |
|
|
|
/* show *_status entries */ |
|
static ssize_t bq2415x_sysfs_show_status(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
enum bq2415x_command command; |
|
int ret; |
|
|
|
if (strcmp(attr->attr.name, "otg_status") == 0) |
|
command = BQ2415X_OTG_STATUS; |
|
else if (strcmp(attr->attr.name, "charge_status") == 0) |
|
command = BQ2415X_CHARGE_STATUS; |
|
else if (strcmp(attr->attr.name, "boost_status") == 0) |
|
command = BQ2415X_BOOST_STATUS; |
|
else if (strcmp(attr->attr.name, "fault_status") == 0) |
|
command = BQ2415X_FAULT_STATUS; |
|
else |
|
return -EINVAL; |
|
|
|
ret = bq2415x_exec_command(bq, command); |
|
if (ret < 0) |
|
return ret; |
|
return sprintf(buf, "%d\n", ret); |
|
} |
|
|
|
/* |
|
* set timer entry: |
|
* auto - enable auto mode |
|
* off - disable auto mode |
|
* (other values) - reset chip timer |
|
*/ |
|
static ssize_t bq2415x_sysfs_set_timer(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, |
|
size_t count) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
int ret = 0; |
|
|
|
if (strncmp(buf, "auto", 4) == 0) |
|
bq2415x_set_autotimer(bq, 1); |
|
else if (strncmp(buf, "off", 3) == 0) |
|
bq2415x_set_autotimer(bq, 0); |
|
else |
|
ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); |
|
|
|
if (ret < 0) |
|
return ret; |
|
return count; |
|
} |
|
|
|
/* show timer entry (auto or off) */ |
|
static ssize_t bq2415x_sysfs_show_timer(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
|
|
if (bq->timer_error) |
|
return sprintf(buf, "%s\n", bq->timer_error); |
|
|
|
if (bq->autotimer) |
|
return sprintf(buf, "auto\n"); |
|
return sprintf(buf, "off\n"); |
|
} |
|
|
|
/* |
|
* set mode entry: |
|
* auto - if automode is supported, enable it and set mode to reported |
|
* none - disable charger and boost mode |
|
* host - charging mode for host/hub chargers (current limit 500mA) |
|
* dedicated - charging mode for dedicated chargers (unlimited current limit) |
|
* boost - disable charger and enable boost mode |
|
*/ |
|
static ssize_t bq2415x_sysfs_set_mode(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, |
|
size_t count) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
enum bq2415x_mode mode; |
|
int ret = 0; |
|
|
|
if (strncmp(buf, "auto", 4) == 0) { |
|
if (bq->automode < 0) |
|
return -EINVAL; |
|
bq->automode = 1; |
|
mode = bq->reported_mode; |
|
} else if (strncmp(buf, "off", 3) == 0) { |
|
if (bq->automode > 0) |
|
bq->automode = 0; |
|
mode = BQ2415X_MODE_OFF; |
|
} else if (strncmp(buf, "none", 4) == 0) { |
|
if (bq->automode > 0) |
|
bq->automode = 0; |
|
mode = BQ2415X_MODE_NONE; |
|
} else if (strncmp(buf, "host", 4) == 0) { |
|
if (bq->automode > 0) |
|
bq->automode = 0; |
|
mode = BQ2415X_MODE_HOST_CHARGER; |
|
} else if (strncmp(buf, "dedicated", 9) == 0) { |
|
if (bq->automode > 0) |
|
bq->automode = 0; |
|
mode = BQ2415X_MODE_DEDICATED_CHARGER; |
|
} else if (strncmp(buf, "boost", 5) == 0) { |
|
if (bq->automode > 0) |
|
bq->automode = 0; |
|
mode = BQ2415X_MODE_BOOST; |
|
} else if (strncmp(buf, "reset", 5) == 0) { |
|
bq2415x_reset_chip(bq); |
|
bq2415x_set_defaults(bq); |
|
if (bq->automode <= 0) |
|
return count; |
|
bq->automode = 1; |
|
mode = bq->reported_mode; |
|
} else { |
|
return -EINVAL; |
|
} |
|
|
|
ret = bq2415x_set_mode(bq, mode); |
|
if (ret < 0) |
|
return ret; |
|
return count; |
|
} |
|
|
|
/* show mode entry (auto, none, host, dedicated or boost) */ |
|
static ssize_t bq2415x_sysfs_show_mode(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
ssize_t ret = 0; |
|
|
|
if (bq->automode > 0) |
|
ret += sprintf(buf+ret, "auto ("); |
|
|
|
switch (bq->mode) { |
|
case BQ2415X_MODE_OFF: |
|
ret += sprintf(buf+ret, "off"); |
|
break; |
|
case BQ2415X_MODE_NONE: |
|
ret += sprintf(buf+ret, "none"); |
|
break; |
|
case BQ2415X_MODE_HOST_CHARGER: |
|
ret += sprintf(buf+ret, "host"); |
|
break; |
|
case BQ2415X_MODE_DEDICATED_CHARGER: |
|
ret += sprintf(buf+ret, "dedicated"); |
|
break; |
|
case BQ2415X_MODE_BOOST: |
|
ret += sprintf(buf+ret, "boost"); |
|
break; |
|
} |
|
|
|
if (bq->automode > 0) |
|
ret += sprintf(buf+ret, ")"); |
|
|
|
ret += sprintf(buf+ret, "\n"); |
|
return ret; |
|
} |
|
|
|
/* show reported_mode entry (none, host, dedicated or boost) */ |
|
static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
|
|
if (bq->automode < 0) |
|
return -EINVAL; |
|
|
|
switch (bq->reported_mode) { |
|
case BQ2415X_MODE_OFF: |
|
return sprintf(buf, "off\n"); |
|
case BQ2415X_MODE_NONE: |
|
return sprintf(buf, "none\n"); |
|
case BQ2415X_MODE_HOST_CHARGER: |
|
return sprintf(buf, "host\n"); |
|
case BQ2415X_MODE_DEDICATED_CHARGER: |
|
return sprintf(buf, "dedicated\n"); |
|
case BQ2415X_MODE_BOOST: |
|
return sprintf(buf, "boost\n"); |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
/* directly set raw value to chip register, format: 'register value' */ |
|
static ssize_t bq2415x_sysfs_set_registers(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, |
|
size_t count) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
ssize_t ret = 0; |
|
unsigned int reg; |
|
unsigned int val; |
|
|
|
if (sscanf(buf, "%x %x", ®, &val) != 2) |
|
return -EINVAL; |
|
|
|
if (reg > 4 || val > 255) |
|
return -EINVAL; |
|
|
|
ret = bq2415x_i2c_write(bq, reg, val); |
|
if (ret < 0) |
|
return ret; |
|
return count; |
|
} |
|
|
|
/* print value of chip register, format: 'register=value' */ |
|
static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq, |
|
u8 reg, |
|
char *buf) |
|
{ |
|
int ret = bq2415x_i2c_read(bq, reg); |
|
|
|
if (ret < 0) |
|
return sprintf(buf, "%#.2x=error %d\n", reg, ret); |
|
return sprintf(buf, "%#.2x=%#.2x\n", reg, ret); |
|
} |
|
|
|
/* show all raw values of chip register, format per line: 'register=value' */ |
|
static ssize_t bq2415x_sysfs_show_registers(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
ssize_t ret = 0; |
|
|
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret); |
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret); |
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret); |
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret); |
|
ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret); |
|
return ret; |
|
} |
|
|
|
/* set current and voltage limit entries (in mA or mV) */ |
|
static ssize_t bq2415x_sysfs_set_limit(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, |
|
size_t count) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
long val; |
|
int ret; |
|
|
|
if (kstrtol(buf, 10, &val) < 0) |
|
return -EINVAL; |
|
|
|
if (strcmp(attr->attr.name, "current_limit") == 0) |
|
ret = bq2415x_set_current_limit(bq, val); |
|
else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0) |
|
ret = bq2415x_set_weak_battery_voltage(bq, val); |
|
else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0) |
|
ret = bq2415x_set_battery_regulation_voltage(bq, val); |
|
else if (strcmp(attr->attr.name, "charge_current") == 0) |
|
ret = bq2415x_set_charge_current(bq, val); |
|
else if (strcmp(attr->attr.name, "termination_current") == 0) |
|
ret = bq2415x_set_termination_current(bq, val); |
|
else |
|
return -EINVAL; |
|
|
|
if (ret < 0) |
|
return ret; |
|
return count; |
|
} |
|
|
|
/* show current and voltage limit entries (in mA or mV) */ |
|
static ssize_t bq2415x_sysfs_show_limit(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
int ret; |
|
|
|
if (strcmp(attr->attr.name, "current_limit") == 0) |
|
ret = bq2415x_get_current_limit(bq); |
|
else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0) |
|
ret = bq2415x_get_weak_battery_voltage(bq); |
|
else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0) |
|
ret = bq2415x_get_battery_regulation_voltage(bq); |
|
else if (strcmp(attr->attr.name, "charge_current") == 0) |
|
ret = bq2415x_get_charge_current(bq); |
|
else if (strcmp(attr->attr.name, "termination_current") == 0) |
|
ret = bq2415x_get_termination_current(bq); |
|
else |
|
return -EINVAL; |
|
|
|
if (ret < 0) |
|
return ret; |
|
return sprintf(buf, "%d\n", ret); |
|
} |
|
|
|
/* set *_enable entries */ |
|
static ssize_t bq2415x_sysfs_set_enable(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, |
|
size_t count) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
enum bq2415x_command command; |
|
long val; |
|
int ret; |
|
|
|
if (kstrtol(buf, 10, &val) < 0) |
|
return -EINVAL; |
|
|
|
if (strcmp(attr->attr.name, "charge_termination_enable") == 0) |
|
command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE : |
|
BQ2415X_CHARGE_TERMINATION_DISABLE; |
|
else if (strcmp(attr->attr.name, "high_impedance_enable") == 0) |
|
command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE : |
|
BQ2415X_HIGH_IMPEDANCE_DISABLE; |
|
else if (strcmp(attr->attr.name, "otg_pin_enable") == 0) |
|
command = val ? BQ2415X_OTG_PIN_ENABLE : |
|
BQ2415X_OTG_PIN_DISABLE; |
|
else if (strcmp(attr->attr.name, "stat_pin_enable") == 0) |
|
command = val ? BQ2415X_STAT_PIN_ENABLE : |
|
BQ2415X_STAT_PIN_DISABLE; |
|
else |
|
return -EINVAL; |
|
|
|
ret = bq2415x_exec_command(bq, command); |
|
if (ret < 0) |
|
return ret; |
|
return count; |
|
} |
|
|
|
/* show *_enable entries */ |
|
static ssize_t bq2415x_sysfs_show_enable(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq2415x_device *bq = power_supply_get_drvdata(psy); |
|
enum bq2415x_command command; |
|
int ret; |
|
|
|
if (strcmp(attr->attr.name, "charge_termination_enable") == 0) |
|
command = BQ2415X_CHARGE_TERMINATION_STATUS; |
|
else if (strcmp(attr->attr.name, "high_impedance_enable") == 0) |
|
command = BQ2415X_HIGH_IMPEDANCE_STATUS; |
|
else if (strcmp(attr->attr.name, "otg_pin_enable") == 0) |
|
command = BQ2415X_OTG_PIN_STATUS; |
|
else if (strcmp(attr->attr.name, "stat_pin_enable") == 0) |
|
command = BQ2415X_STAT_PIN_STATUS; |
|
else |
|
return -EINVAL; |
|
|
|
ret = bq2415x_exec_command(bq, command); |
|
if (ret < 0) |
|
return ret; |
|
return sprintf(buf, "%d\n", ret); |
|
} |
|
|
|
static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
|
static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
|
static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
|
static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
|
static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
|
|
|
static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); |
|
static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); |
|
static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); |
|
static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); |
|
|
|
static DEVICE_ATTR(reported_mode, S_IRUGO, |
|
bq2415x_sysfs_show_reported_mode, NULL); |
|
static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode); |
|
static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer); |
|
|
|
static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO, |
|
bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers); |
|
|
|
static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); |
|
static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); |
|
static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); |
|
static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); |
|
|
|
static struct attribute *bq2415x_sysfs_attrs[] = { |
|
/* |
|
* TODO: some (appropriate) of these attrs should be switched to |
|
* use power supply class props. |
|
*/ |
|
&dev_attr_current_limit.attr, |
|
&dev_attr_weak_battery_voltage.attr, |
|
&dev_attr_battery_regulation_voltage.attr, |
|
&dev_attr_charge_current.attr, |
|
&dev_attr_termination_current.attr, |
|
|
|
&dev_attr_charge_termination_enable.attr, |
|
&dev_attr_high_impedance_enable.attr, |
|
&dev_attr_otg_pin_enable.attr, |
|
&dev_attr_stat_pin_enable.attr, |
|
|
|
&dev_attr_reported_mode.attr, |
|
&dev_attr_mode.attr, |
|
&dev_attr_timer.attr, |
|
|
|
&dev_attr_registers.attr, |
|
|
|
&dev_attr_otg_status.attr, |
|
&dev_attr_charge_status.attr, |
|
&dev_attr_boost_status.attr, |
|
&dev_attr_fault_status.attr, |
|
NULL, |
|
}; |
|
|
|
ATTRIBUTE_GROUPS(bq2415x_sysfs); |
|
|
|
static int bq2415x_power_supply_init(struct bq2415x_device *bq) |
|
{ |
|
int ret; |
|
int chip; |
|
char revstr[8]; |
|
struct power_supply_config psy_cfg = { |
|
.drv_data = bq, |
|
.of_node = bq->dev->of_node, |
|
.attr_grp = bq2415x_sysfs_groups, |
|
}; |
|
|
|
bq->charger_desc.name = bq->name; |
|
bq->charger_desc.type = POWER_SUPPLY_TYPE_USB; |
|
bq->charger_desc.properties = bq2415x_power_supply_props; |
|
bq->charger_desc.num_properties = |
|
ARRAY_SIZE(bq2415x_power_supply_props); |
|
bq->charger_desc.get_property = bq2415x_power_supply_get_property; |
|
|
|
ret = bq2415x_detect_chip(bq); |
|
if (ret < 0) |
|
chip = BQUNKNOWN; |
|
else |
|
chip = ret; |
|
|
|
ret = bq2415x_detect_revision(bq); |
|
if (ret < 0) |
|
strcpy(revstr, "unknown"); |
|
else |
|
sprintf(revstr, "1.%d", ret); |
|
|
|
bq->model = kasprintf(GFP_KERNEL, |
|
"chip %s, revision %s, vender code %.3d", |
|
bq2415x_chip_name[chip], revstr, |
|
bq2415x_get_vender_code(bq)); |
|
if (!bq->model) { |
|
dev_err(bq->dev, "failed to allocate model name\n"); |
|
return -ENOMEM; |
|
} |
|
|
|
bq->charger = power_supply_register(bq->dev, &bq->charger_desc, |
|
&psy_cfg); |
|
if (IS_ERR(bq->charger)) { |
|
kfree(bq->model); |
|
return PTR_ERR(bq->charger); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* main bq2415x probe function */ |
|
static int bq2415x_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
int ret; |
|
int num; |
|
char *name = NULL; |
|
struct bq2415x_device *bq; |
|
struct device_node *np = client->dev.of_node; |
|
struct bq2415x_platform_data *pdata = client->dev.platform_data; |
|
const struct acpi_device_id *acpi_id = NULL; |
|
struct power_supply *notify_psy = NULL; |
|
union power_supply_propval prop; |
|
|
|
if (!np && !pdata && !ACPI_HANDLE(&client->dev)) { |
|
dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n"); |
|
return -ENODEV; |
|
} |
|
|
|
/* Get new ID for the new device */ |
|
mutex_lock(&bq2415x_id_mutex); |
|
num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL); |
|
mutex_unlock(&bq2415x_id_mutex); |
|
if (num < 0) |
|
return num; |
|
|
|
if (id) { |
|
name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num); |
|
} else if (ACPI_HANDLE(&client->dev)) { |
|
acpi_id = |
|
acpi_match_device(client->dev.driver->acpi_match_table, |
|
&client->dev); |
|
if (!acpi_id) { |
|
dev_err(&client->dev, "failed to match device name\n"); |
|
ret = -ENODEV; |
|
goto error_1; |
|
} |
|
name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num); |
|
} |
|
if (!name) { |
|
dev_err(&client->dev, "failed to allocate device name\n"); |
|
ret = -ENOMEM; |
|
goto error_1; |
|
} |
|
|
|
bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL); |
|
if (!bq) { |
|
ret = -ENOMEM; |
|
goto error_2; |
|
} |
|
|
|
i2c_set_clientdata(client, bq); |
|
|
|
bq->id = num; |
|
bq->dev = &client->dev; |
|
if (id) |
|
bq->chip = id->driver_data; |
|
else if (ACPI_HANDLE(bq->dev)) |
|
bq->chip = acpi_id->driver_data; |
|
bq->name = name; |
|
bq->mode = BQ2415X_MODE_OFF; |
|
bq->reported_mode = BQ2415X_MODE_OFF; |
|
bq->autotimer = 0; |
|
bq->automode = 0; |
|
|
|
if (np || ACPI_HANDLE(bq->dev)) { |
|
ret = device_property_read_u32(bq->dev, |
|
"ti,current-limit", |
|
&bq->init_data.current_limit); |
|
if (ret) |
|
goto error_2; |
|
ret = device_property_read_u32(bq->dev, |
|
"ti,weak-battery-voltage", |
|
&bq->init_data.weak_battery_voltage); |
|
if (ret) |
|
goto error_2; |
|
ret = device_property_read_u32(bq->dev, |
|
"ti,battery-regulation-voltage", |
|
&bq->init_data.battery_regulation_voltage); |
|
if (ret) |
|
goto error_2; |
|
ret = device_property_read_u32(bq->dev, |
|
"ti,charge-current", |
|
&bq->init_data.charge_current); |
|
if (ret) |
|
goto error_2; |
|
ret = device_property_read_u32(bq->dev, |
|
"ti,termination-current", |
|
&bq->init_data.termination_current); |
|
if (ret) |
|
goto error_2; |
|
ret = device_property_read_u32(bq->dev, |
|
"ti,resistor-sense", |
|
&bq->init_data.resistor_sense); |
|
if (ret) |
|
goto error_2; |
|
if (np) |
|
bq->notify_node = of_parse_phandle(np, |
|
"ti,usb-charger-detection", 0); |
|
} else { |
|
memcpy(&bq->init_data, pdata, sizeof(bq->init_data)); |
|
} |
|
|
|
bq2415x_reset_chip(bq); |
|
|
|
ret = bq2415x_power_supply_init(bq); |
|
if (ret) { |
|
dev_err(bq->dev, "failed to register power supply: %d\n", ret); |
|
goto error_2; |
|
} |
|
|
|
ret = bq2415x_set_defaults(bq); |
|
if (ret) { |
|
dev_err(bq->dev, "failed to set default values: %d\n", ret); |
|
goto error_3; |
|
} |
|
|
|
if (bq->notify_node || bq->init_data.notify_device) { |
|
bq->nb.notifier_call = bq2415x_notifier_call; |
|
ret = power_supply_reg_notifier(&bq->nb); |
|
if (ret) { |
|
dev_err(bq->dev, "failed to reg notifier: %d\n", ret); |
|
goto error_3; |
|
} |
|
|
|
bq->automode = 1; |
|
dev_info(bq->dev, "automode supported, waiting for events\n"); |
|
} else { |
|
bq->automode = -1; |
|
dev_info(bq->dev, "automode not supported\n"); |
|
} |
|
|
|
/* Query for initial reported_mode and set it */ |
|
if (bq->nb.notifier_call) { |
|
if (np) { |
|
notify_psy = power_supply_get_by_phandle(np, |
|
"ti,usb-charger-detection"); |
|
if (IS_ERR(notify_psy)) |
|
notify_psy = NULL; |
|
} else if (bq->init_data.notify_device) { |
|
notify_psy = power_supply_get_by_name( |
|
bq->init_data.notify_device); |
|
} |
|
} |
|
if (notify_psy) { |
|
ret = power_supply_get_property(notify_psy, |
|
POWER_SUPPLY_PROP_CURRENT_MAX, &prop); |
|
power_supply_put(notify_psy); |
|
|
|
if (ret == 0) { |
|
bq2415x_update_reported_mode(bq, prop.intval); |
|
bq2415x_set_mode(bq, bq->reported_mode); |
|
} |
|
} |
|
|
|
INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work); |
|
bq2415x_set_autotimer(bq, 1); |
|
|
|
dev_info(bq->dev, "driver registered\n"); |
|
return 0; |
|
|
|
error_3: |
|
bq2415x_power_supply_exit(bq); |
|
error_2: |
|
if (bq) |
|
of_node_put(bq->notify_node); |
|
kfree(name); |
|
error_1: |
|
mutex_lock(&bq2415x_id_mutex); |
|
idr_remove(&bq2415x_id, num); |
|
mutex_unlock(&bq2415x_id_mutex); |
|
|
|
return ret; |
|
} |
|
|
|
/* main bq2415x remove function */ |
|
|
|
static void bq2415x_remove(struct i2c_client *client) |
|
{ |
|
struct bq2415x_device *bq = i2c_get_clientdata(client); |
|
|
|
if (bq->nb.notifier_call) |
|
power_supply_unreg_notifier(&bq->nb); |
|
|
|
of_node_put(bq->notify_node); |
|
bq2415x_power_supply_exit(bq); |
|
|
|
bq2415x_reset_chip(bq); |
|
|
|
mutex_lock(&bq2415x_id_mutex); |
|
idr_remove(&bq2415x_id, bq->id); |
|
mutex_unlock(&bq2415x_id_mutex); |
|
|
|
dev_info(bq->dev, "driver unregistered\n"); |
|
|
|
kfree(bq->name); |
|
} |
|
|
|
static const struct i2c_device_id bq2415x_i2c_id_table[] = { |
|
{ "bq2415x", BQUNKNOWN }, |
|
{ "bq24150", BQ24150 }, |
|
{ "bq24150a", BQ24150A }, |
|
{ "bq24151", BQ24151 }, |
|
{ "bq24151a", BQ24151A }, |
|
{ "bq24152", BQ24152 }, |
|
{ "bq24153", BQ24153 }, |
|
{ "bq24153a", BQ24153A }, |
|
{ "bq24155", BQ24155 }, |
|
{ "bq24156", BQ24156 }, |
|
{ "bq24156a", BQ24156A }, |
|
{ "bq24157s", BQ24157S }, |
|
{ "bq24158", BQ24158 }, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table); |
|
|
|
#ifdef CONFIG_ACPI |
|
static const struct acpi_device_id bq2415x_i2c_acpi_match[] = { |
|
{ "BQ2415X", BQUNKNOWN }, |
|
{ "BQ241500", BQ24150 }, |
|
{ "BQA24150", BQ24150A }, |
|
{ "BQ241510", BQ24151 }, |
|
{ "BQA24151", BQ24151A }, |
|
{ "BQ241520", BQ24152 }, |
|
{ "BQ241530", BQ24153 }, |
|
{ "BQA24153", BQ24153A }, |
|
{ "BQ241550", BQ24155 }, |
|
{ "BQ241560", BQ24156 }, |
|
{ "BQA24156", BQ24156A }, |
|
{ "BQS24157", BQ24157S }, |
|
{ "BQ241580", BQ24158 }, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(acpi, bq2415x_i2c_acpi_match); |
|
#endif |
|
|
|
#ifdef CONFIG_OF |
|
static const struct of_device_id bq2415x_of_match_table[] = { |
|
{ .compatible = "ti,bq24150" }, |
|
{ .compatible = "ti,bq24150a" }, |
|
{ .compatible = "ti,bq24151" }, |
|
{ .compatible = "ti,bq24151a" }, |
|
{ .compatible = "ti,bq24152" }, |
|
{ .compatible = "ti,bq24153" }, |
|
{ .compatible = "ti,bq24153a" }, |
|
{ .compatible = "ti,bq24155" }, |
|
{ .compatible = "ti,bq24156" }, |
|
{ .compatible = "ti,bq24156a" }, |
|
{ .compatible = "ti,bq24157s" }, |
|
{ .compatible = "ti,bq24158" }, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(of, bq2415x_of_match_table); |
|
#endif |
|
|
|
static struct i2c_driver bq2415x_driver = { |
|
.driver = { |
|
.name = "bq2415x-charger", |
|
.of_match_table = of_match_ptr(bq2415x_of_match_table), |
|
.acpi_match_table = ACPI_PTR(bq2415x_i2c_acpi_match), |
|
}, |
|
.probe = bq2415x_probe, |
|
.remove = bq2415x_remove, |
|
.id_table = bq2415x_i2c_id_table, |
|
}; |
|
module_i2c_driver(bq2415x_driver); |
|
|
|
MODULE_AUTHOR("Pali Rohár <[email protected]>"); |
|
MODULE_DESCRIPTION("bq2415x charger driver"); |
|
MODULE_LICENSE("GPL");
|
|
|