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- /*
- * bq2415x charger driver
- *
- * Copyright (C) 2011-2013 Pali Rohár <pali.rohar@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * Datasheets:
- * http://www.ti.com/product/bq24150
- * http://www.ti.com/product/bq24150a
- * http://www.ti.com/product/bq24152
- * http://www.ti.com/product/bq24153
- * http://www.ti.com/product/bq24153a
- * http://www.ti.com/product/bq24155
- * http://www.ti.com/product/bq24157s
- * http://www.ti.com/product/bq24158
- */
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/param.h>
- #include <linux/err.h>
- #include <linux/workqueue.h>
- #include <linux/sysfs.h>
- #include <linux/platform_device.h>
- #include <linux/power_supply.h>
- #include <linux/idr.h>
- #include <linux/i2c.h>
- #include <linux/slab.h>
- #include <linux/acpi.h>
- #include <linux/power/bq2415x_charger.h>
- /* timeout for resetting chip timer */
- #define BQ2415X_TIMER_TIMEOUT 10
- #define BQ2415X_REG_STATUS 0x00
- #define BQ2415X_REG_CONTROL 0x01
- #define BQ2415X_REG_VOLTAGE 0x02
- #define BQ2415X_REG_VENDER 0x03
- #define BQ2415X_REG_CURRENT 0x04
- /* reset state for all registers */
- #define BQ2415X_RESET_STATUS BIT(6)
- #define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5))
- #define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3))
- #define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7))
- /* status register */
- #define BQ2415X_BIT_TMR_RST 7
- #define BQ2415X_BIT_OTG 7
- #define BQ2415X_BIT_EN_STAT 6
- #define BQ2415X_MASK_STAT (BIT(4)|BIT(5))
- #define BQ2415X_SHIFT_STAT 4
- #define BQ2415X_BIT_BOOST 3
- #define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2))
- #define BQ2415X_SHIFT_FAULT 0
- /* control register */
- #define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7))
- #define BQ2415X_SHIFT_LIMIT 6
- #define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5))
- #define BQ2415X_SHIFT_VLOWV 4
- #define BQ2415X_BIT_TE 3
- #define BQ2415X_BIT_CE 2
- #define BQ2415X_BIT_HZ_MODE 1
- #define BQ2415X_BIT_OPA_MODE 0
- /* voltage register */
- #define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7))
- #define BQ2415X_SHIFT_VO 2
- #define BQ2415X_BIT_OTG_PL 1
- #define BQ2415X_BIT_OTG_EN 0
- /* vender register */
- #define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7))
- #define BQ2415X_SHIFT_VENDER 5
- #define BQ2415X_MASK_PN (BIT(3)|BIT(4))
- #define BQ2415X_SHIFT_PN 3
- #define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2))
- #define BQ2415X_SHIFT_REVISION 0
- /* current register */
- #define BQ2415X_MASK_RESET BIT(7)
- #define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6))
- #define BQ2415X_SHIFT_VI_CHRG 4
- /* N/A BIT(3) */
- #define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2))
- #define BQ2415X_SHIFT_VI_TERM 0
- enum bq2415x_command {
- BQ2415X_TIMER_RESET,
- BQ2415X_OTG_STATUS,
- BQ2415X_STAT_PIN_STATUS,
- BQ2415X_STAT_PIN_ENABLE,
- BQ2415X_STAT_PIN_DISABLE,
- BQ2415X_CHARGE_STATUS,
- BQ2415X_BOOST_STATUS,
- BQ2415X_FAULT_STATUS,
- BQ2415X_CHARGE_TERMINATION_STATUS,
- BQ2415X_CHARGE_TERMINATION_ENABLE,
- BQ2415X_CHARGE_TERMINATION_DISABLE,
- BQ2415X_CHARGER_STATUS,
- BQ2415X_CHARGER_ENABLE,
- BQ2415X_CHARGER_DISABLE,
- BQ2415X_HIGH_IMPEDANCE_STATUS,
- BQ2415X_HIGH_IMPEDANCE_ENABLE,
- BQ2415X_HIGH_IMPEDANCE_DISABLE,
- BQ2415X_BOOST_MODE_STATUS,
- BQ2415X_BOOST_MODE_ENABLE,
- BQ2415X_BOOST_MODE_DISABLE,
- BQ2415X_OTG_LEVEL,
- BQ2415X_OTG_ACTIVATE_HIGH,
- BQ2415X_OTG_ACTIVATE_LOW,
- BQ2415X_OTG_PIN_STATUS,
- BQ2415X_OTG_PIN_ENABLE,
- BQ2415X_OTG_PIN_DISABLE,
- BQ2415X_VENDER_CODE,
- BQ2415X_PART_NUMBER,
- BQ2415X_REVISION,
- };
- enum bq2415x_chip {
- BQUNKNOWN,
- BQ24150,
- BQ24150A,
- BQ24151,
- BQ24151A,
- BQ24152,
- BQ24153,
- BQ24153A,
- BQ24155,
- BQ24156,
- BQ24156A,
- BQ24157S,
- BQ24158,
- };
- static char *bq2415x_chip_name[] = {
- "unknown",
- "bq24150",
- "bq24150a",
- "bq24151",
- "bq24151a",
- "bq24152",
- "bq24153",
- "bq24153a",
- "bq24155",
- "bq24156",
- "bq24156a",
- "bq24157s",
- "bq24158",
- };
- struct bq2415x_device {
- struct device *dev;
- struct bq2415x_platform_data init_data;
- struct power_supply *charger;
- struct power_supply_desc charger_desc;
- struct delayed_work work;
- struct device_node *notify_node;
- struct notifier_block nb;
- enum bq2415x_mode reported_mode;/* mode reported by hook function */
- enum bq2415x_mode mode; /* currently configured mode */
- enum bq2415x_chip chip;
- const char *timer_error;
- char *model;
- char *name;
- int autotimer; /* 1 - if driver automatically reset timer, 0 - not */
- int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */
- int id;
- };
- /* each registered chip must have unique id */
- static DEFINE_IDR(bq2415x_id);
- static DEFINE_MUTEX(bq2415x_id_mutex);
- static DEFINE_MUTEX(bq2415x_timer_mutex);
- static DEFINE_MUTEX(bq2415x_i2c_mutex);
- /**** i2c read functions ****/
- /* read value from register */
- static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
- {
- struct i2c_client *client = to_i2c_client(bq->dev);
- struct i2c_msg msg[2];
- u8 val;
- int ret;
- if (!client->adapter)
- return -ENODEV;
- msg[0].addr = client->addr;
- msg[0].flags = 0;
- msg[0].buf = ®
- msg[0].len = sizeof(reg);
- msg[1].addr = client->addr;
- msg[1].flags = I2C_M_RD;
- msg[1].buf = &val;
- msg[1].len = sizeof(val);
- mutex_lock(&bq2415x_i2c_mutex);
- ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
- mutex_unlock(&bq2415x_i2c_mutex);
- if (ret < 0)
- return ret;
- return val;
- }
- /* read value from register, apply mask and right shift it */
- static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
- u8 mask, u8 shift)
- {
- int ret;
- if (shift > 8)
- return -EINVAL;
- ret = bq2415x_i2c_read(bq, reg);
- if (ret < 0)
- return ret;
- return (ret & mask) >> shift;
- }
- /* read value from register and return one specified bit */
- static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
- {
- if (bit > 8)
- return -EINVAL;
- return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
- }
- /**** i2c write functions ****/
- /* write value to register */
- static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
- {
- struct i2c_client *client = to_i2c_client(bq->dev);
- struct i2c_msg msg[1];
- u8 data[2];
- int ret;
- data[0] = reg;
- data[1] = val;
- msg[0].addr = client->addr;
- msg[0].flags = 0;
- msg[0].buf = data;
- msg[0].len = ARRAY_SIZE(data);
- mutex_lock(&bq2415x_i2c_mutex);
- ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
- mutex_unlock(&bq2415x_i2c_mutex);
- /* i2c_transfer returns number of messages transferred */
- if (ret < 0)
- return ret;
- else if (ret != 1)
- return -EIO;
- return 0;
- }
- /* read value from register, change it with mask left shifted and write back */
- static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
- u8 mask, u8 shift)
- {
- int ret;
- if (shift > 8)
- return -EINVAL;
- ret = bq2415x_i2c_read(bq, reg);
- if (ret < 0)
- return ret;
- ret &= ~mask;
- ret |= val << shift;
- return bq2415x_i2c_write(bq, reg, ret);
- }
- /* change only one bit in register */
- static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
- bool val, u8 bit)
- {
- if (bit > 8)
- return -EINVAL;
- return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
- }
- /**** global functions ****/
- /* exec command function */
- static int bq2415x_exec_command(struct bq2415x_device *bq,
- enum bq2415x_command command)
- {
- int ret;
- switch (command) {
- case BQ2415X_TIMER_RESET:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS,
- 1, BQ2415X_BIT_TMR_RST);
- case BQ2415X_OTG_STATUS:
- return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
- BQ2415X_BIT_OTG);
- case BQ2415X_STAT_PIN_STATUS:
- return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
- BQ2415X_BIT_EN_STAT);
- case BQ2415X_STAT_PIN_ENABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1,
- BQ2415X_BIT_EN_STAT);
- case BQ2415X_STAT_PIN_DISABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0,
- BQ2415X_BIT_EN_STAT);
- case BQ2415X_CHARGE_STATUS:
- return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
- BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT);
- case BQ2415X_BOOST_STATUS:
- return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
- BQ2415X_BIT_BOOST);
- case BQ2415X_FAULT_STATUS:
- return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
- BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
- case BQ2415X_CHARGE_TERMINATION_STATUS:
- return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
- BQ2415X_BIT_TE);
- case BQ2415X_CHARGE_TERMINATION_ENABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
- 1, BQ2415X_BIT_TE);
- case BQ2415X_CHARGE_TERMINATION_DISABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
- 0, BQ2415X_BIT_TE);
- case BQ2415X_CHARGER_STATUS:
- ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
- BQ2415X_BIT_CE);
- if (ret < 0)
- return ret;
- return ret > 0 ? 0 : 1;
- case BQ2415X_CHARGER_ENABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
- 0, BQ2415X_BIT_CE);
- case BQ2415X_CHARGER_DISABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
- 1, BQ2415X_BIT_CE);
- case BQ2415X_HIGH_IMPEDANCE_STATUS:
- return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
- BQ2415X_BIT_HZ_MODE);
- case BQ2415X_HIGH_IMPEDANCE_ENABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
- 1, BQ2415X_BIT_HZ_MODE);
- case BQ2415X_HIGH_IMPEDANCE_DISABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
- 0, BQ2415X_BIT_HZ_MODE);
- case BQ2415X_BOOST_MODE_STATUS:
- return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
- BQ2415X_BIT_OPA_MODE);
- case BQ2415X_BOOST_MODE_ENABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
- 1, BQ2415X_BIT_OPA_MODE);
- case BQ2415X_BOOST_MODE_DISABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
- 0, BQ2415X_BIT_OPA_MODE);
- case BQ2415X_OTG_LEVEL:
- return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
- BQ2415X_BIT_OTG_PL);
- case BQ2415X_OTG_ACTIVATE_HIGH:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
- 1, BQ2415X_BIT_OTG_PL);
- case BQ2415X_OTG_ACTIVATE_LOW:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
- 0, BQ2415X_BIT_OTG_PL);
- case BQ2415X_OTG_PIN_STATUS:
- return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
- BQ2415X_BIT_OTG_EN);
- case BQ2415X_OTG_PIN_ENABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
- 1, BQ2415X_BIT_OTG_EN);
- case BQ2415X_OTG_PIN_DISABLE:
- return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
- 0, BQ2415X_BIT_OTG_EN);
- case BQ2415X_VENDER_CODE:
- return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
- BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER);
- case BQ2415X_PART_NUMBER:
- return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
- BQ2415X_MASK_PN, BQ2415X_SHIFT_PN);
- case BQ2415X_REVISION:
- return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
- BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION);
- }
- return -EINVAL;
- }
- /* detect chip type */
- static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
- {
- struct i2c_client *client = to_i2c_client(bq->dev);
- int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
- if (ret < 0)
- return ret;
- switch (client->addr) {
- case 0x6b:
- switch (ret) {
- case 0:
- if (bq->chip == BQ24151A)
- return bq->chip;
- return BQ24151;
- case 1:
- if (bq->chip == BQ24150A ||
- bq->chip == BQ24152 ||
- bq->chip == BQ24155)
- return bq->chip;
- return BQ24150;
- case 2:
- if (bq->chip == BQ24153A)
- return bq->chip;
- return BQ24153;
- default:
- return BQUNKNOWN;
- }
- break;
- case 0x6a:
- switch (ret) {
- case 0:
- if (bq->chip == BQ24156A)
- 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);
- int chip = bq2415x_detect_chip(bq);
- if (ret < 0 || chip < 0)
- 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 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, };
- 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;
- }
- 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_attributes[] = {
- /*
- * 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,
- };
- static const struct attribute_group bq2415x_sysfs_attr_group = {
- .attrs = bq2415x_sysfs_attributes,
- };
- static int bq2415x_sysfs_init(struct bq2415x_device *bq)
- {
- return sysfs_create_group(&bq->charger->dev.kobj,
- &bq2415x_sysfs_attr_group);
- }
- static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
- {
- sysfs_remove_group(&bq->charger->dev.kobj, &bq2415x_sysfs_attr_group);
- }
- /* 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);
- 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_sysfs_init(bq);
- if (ret) {
- dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
- goto error_3;
- }
- ret = bq2415x_set_defaults(bq);
- if (ret) {
- dev_err(bq->dev, "failed to set default values: %d\n", ret);
- goto error_4;
- }
- 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_4;
- }
- 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_4:
- bq2415x_sysfs_exit(bq);
- error_3:
- bq2415x_power_supply_exit(bq);
- error_2:
- if (bq && bq->notify_node)
- 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 int 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);
- if (bq->notify_node)
- of_node_put(bq->notify_node);
- bq2415x_sysfs_exit(bq);
- 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);
- return 0;
- }
- 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);
- 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);
- static struct i2c_driver bq2415x_driver = {
- .driver = {
- .name = "bq2415x-charger",
- .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 <pali.rohar@gmail.com>");
- MODULE_DESCRIPTION("bq2415x charger driver");
- MODULE_LICENSE("GPL");
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