--- /dev/null
+--- /dev/null 2012-04-29 08:55:34.366920721 +0200
++++ kernel-power/drivers/power/bq2415x_charger.c 2012-04-29 17:53:57.799826239 +0200
+@@ -0,0 +1,1564 @@
++/*
++ bq2415x_charger.c - bq2415x charger driver
++ Copyright (C) 2011-2012 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.
++
++ You should have received a copy of the GNU General Public License along
++ with this program; if not, write to the Free Software Foundation, Inc.,
++ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
++*/
++
++/*
++ 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
++*/
++
++#include <linux/version.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/power/bq2415x_charger.h>
++
++#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 */
++/* RESET BIT(7) */
++#define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6)|BIT(7))
++#define BQ2415X_SHIFT_VI_CHRG 4
++/* N/A BIT(3) */
++#define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2)|BIT(7))
++#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,
++ BQ24158,
++};
++
++enum bq2415x_mode {
++ BQ2415X_MODE_NONE,
++ BQ2415X_MODE_HOST_CHARGER,
++ BQ2415X_MODE_DEDICATED_CHARGER,
++ BQ2415X_MODE_BOOST,
++};
++
++static char *bq2415x_chip_name[] = {
++ "unknown",
++ "bq24150",
++ "bq24150a",
++ "bq24151",
++ "bq24151a",
++ "bq24152",
++ "bq24153",
++ "bq24153a",
++ "bq24155",
++ "bq24156",
++ "bq24156a",
++ "bq24158",
++};
++
++struct bq2415x_device {
++ struct device *dev;
++ struct bq2415x_platform_data init_data;
++ struct power_supply charger;
++ struct delayed_work work;
++ enum bq2415x_mode charger_mode; /* mode reported by hook function */
++ enum bq2415x_mode mode; /* actual setted mode */
++ enum bq2415x_chip chip;
++ 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;
++};
++
++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 */
++
++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;
++}
++
++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;
++ else
++ return (ret & mask) >> shift;
++}
++
++static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
++{
++ if (bit > 8)
++ return -EINVAL;
++ else
++ return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
++}
++
++/* i2c write functions */
++
++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;
++}
++
++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);
++}
++
++static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
++ bool val, u8 bit)
++{
++ if (bit > 8)
++ return -EINVAL;
++ else
++ return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
++}
++
++/* global 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;
++ else
++ 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);
++
++ default:
++ return -EINVAL;
++ }
++}
++
++/* global detect chip */
++
++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;
++ else
++ return BQ24151;
++ case 1:
++ if (bq->chip == BQ24150A ||
++ bq->chip == BQ24152 ||
++ bq->chip == BQ24155)
++ return bq->chip;
++ else
++ return BQ24150;
++ case 2:
++ if (bq->chip == BQ24153A)
++ return bq->chip;
++ else
++ return BQ24153;
++ default:
++ return BQUNKNOWN;
++ }
++ break;
++
++ case 0x6a:
++ switch (ret) {
++ case 0:
++ if (bq->chip == BQ24156A)
++ return bq->chip;
++ else
++ return BQ24156;
++ case 2:
++ return BQ24158;
++ default:
++ return BQUNKNOWN;
++ }
++ break;
++ }
++
++ return BQUNKNOWN;
++}
++
++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;
++ else
++ return -1;
++
++ case BQ24153:
++ case BQ24153A:
++ case BQ24156:
++ case BQ24156A:
++ case BQ24158:
++ if (ret == 3)
++ return 0;
++ else if (ret == 1)
++ return 1;
++ else
++ return -1;
++
++ case BQ24155:
++ if (ret == 3)
++ return 3;
++ else
++ return -1;
++
++ case BQUNKNOWN:
++ return -1;
++ }
++
++ return -1;
++}
++
++static int bq2415x_get_vender_code(struct bq2415x_device *bq)
++{
++ int ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
++ if (ret < 0)
++ return 0;
++ else /* convert to binary */
++ return (ret & 0x1) +
++ ((ret >> 1) & 0x1) * 10 +
++ ((ret >> 2) & 0x1) * 100;
++}
++
++/* global other functions */
++
++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);
++}
++
++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);
++}
++
++static int bq2415x_get_current_limit(struct bq2415x_device *bq)
++{
++ int 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;
++ else
++ return -EINVAL;
++}
++
++static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
++{
++ int val = mV/100 + (mV%100 > 0 ? 1 : 0) - 34;
++
++ if (val < 0)
++ val = 0;
++ else if (val > 3)
++ val = 3;
++
++ return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
++ BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
++}
++
++static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
++{
++ int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
++ BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
++ if (ret < 0)
++ return ret;
++ else
++ return 100 * (34 + ret);
++}
++
++static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
++ int mV)
++{
++ int val = (mV/10 + (mV%10 > 0 ? 1 : 0) - 350) / 2;
++
++ if (val < 0)
++ val = 0;
++ else if (val > 94) /* FIXME: Max is 94 or 122 ? */
++ return -EINVAL;
++
++ return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,
++ BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
++}
++
++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;
++ else
++ return 10 * (350 + 2*ret);
++}
++
++static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
++{
++ int val;
++ if (bq->init_data.resistor_sense <= 0)
++ return -ENOSYS;
++
++ val = (mA * bq->init_data.resistor_sense - 37400);
++ val = val/6800 + (val%6800 > 0 ? 1 : 0);
++
++ 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_SHIFT_VI_CHRG);
++}
++
++static int bq2415x_get_charge_current(struct bq2415x_device *bq)
++{
++ int ret;
++ if (bq->init_data.resistor_sense <= 0)
++ return -ENOSYS;
++
++ ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
++ BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
++ if (ret < 0)
++ return ret;
++ else
++ return (37400 + 6800*ret) / bq->init_data.resistor_sense;
++}
++
++static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
++{
++ int val;
++ if (bq->init_data.resistor_sense <= 0)
++ return -ENOSYS;
++
++ val = (mA * bq->init_data.resistor_sense - 3400);
++ val = val/3400 + (val%3400 > 0 ? 1 : 0);
++
++ 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_SHIFT_VI_TERM);
++}
++
++static int bq2415x_get_termination_current(struct bq2415x_device *bq)
++{
++ int ret;
++ if (bq->init_data.resistor_sense <= 0)
++ return -ENOSYS;
++
++ ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
++ BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
++ if (ret < 0)
++ return ret;
++ else
++ return (3400 + 3400*ret) / bq->init_data.resistor_sense;
++}
++
++#define bq2415x_set_default_value(bq, value) \
++ do { \
++ int ret = 0; \
++ if (bq->init_data.value != -1) \
++ ret = bq2415x_set_##value(bq, bq->init_data.value); \
++ if (ret < 0) \
++ return ret; \
++ } while (0)
++
++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_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;
++}
++
++#undef bq2415x_set_default_value
++
++/* charger mode functions */
++
++static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
++{
++ int ret = 0;
++ int charger = 0;
++
++ if (mode == BQ2415X_MODE_NONE ||
++ mode == BQ2415X_MODE_HOST_CHARGER ||
++ mode == BQ2415X_MODE_DEDICATED_CHARGER)
++ charger = 1;
++
++ if (charger)
++ ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
++ else
++ ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
++
++ if (ret < 0)
++ return ret;
++
++ switch (mode) {
++ case BQ2415X_MODE_NONE:
++ dev_info(bq->dev, "mode: N/A\n");
++ ret = bq2415x_set_current_limit(bq, 100);
++ break;
++ case BQ2415X_MODE_HOST_CHARGER:
++ dev_info(bq->dev, "mode: Host/HUB charger\n");
++ ret = bq2415x_set_current_limit(bq, 500);
++ break;
++ case BQ2415X_MODE_DEDICATED_CHARGER:
++ dev_info(bq->dev, "mode: Dedicated charger\n");
++ ret = bq2415x_set_current_limit(bq, 1800);
++ break;
++ case BQ2415X_MODE_BOOST: /* Boost mode */
++ dev_info(bq->dev, "mode: 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
++ ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE);
++
++ if (ret < 0)
++ return ret;
++
++ bq->mode = mode;
++ return 0;
++
++}
++
++static void bq2415x_set_charger_type(int type, void *data)
++{
++ struct bq2415x_device *bq = data;
++
++ if (!bq)
++ return;
++
++ switch (type) {
++ case 0:
++ bq->charger_mode = BQ2415X_MODE_NONE;
++ break;
++ case 1:
++ bq->charger_mode = BQ2415X_MODE_HOST_CHARGER;
++ break;
++ case 2:
++ bq->charger_mode = BQ2415X_MODE_DEDICATED_CHARGER;
++ break;
++ default:
++ return;
++ }
++
++ if (bq->automode < 1)
++ return;
++
++ /* TODO: Detect USB Host mode */
++
++ bq2415x_set_mode(bq, bq->charger_mode);
++
++}
++
++/* timer functions */
++
++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);
++ } else {
++ cancel_delayed_work_sync(&bq->work);
++ }
++
++ mutex_unlock(&bq2415x_timer_mutex);
++}
++
++static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
++{
++ dev_err(bq->dev, "%s\n", msg);
++ if (bq->automode > 0)
++ bq->automode = 0;
++ bq2415x_set_mode(bq, BQ2415X_MODE_NONE);
++ bq2415x_set_autotimer(bq, 0);
++}
++
++static void bq2415x_timer_work(struct work_struct *work)
++{
++ struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
++ work.work);
++ int ret, error, boost;
++
++ if (!bq->autotimer)
++ return;
++
++ ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
++ if (ret < 0) {
++ bq2415x_timer_error(bq, "Reseting timer failed");
++ return;
++ }
++
++ boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
++ if (boost < 0) {
++ bq2415x_timer_error(bq, "Unknow error");
++ return;
++ }
++
++ error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
++ if (error < 0) {
++ bq2415x_timer_error(bq, "Unknow error");
++ return;
++ }
++
++ if (boost) {
++ switch (error) {
++ 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;
++
++ case 1: /* Overvoltage protection (chip fried) */
++ bq2415x_timer_error(bq,
++ "Overvolatge 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) {
++ 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;
++
++ case 1: /* Overvoltage protection (chip fried) */
++ bq2415x_timer_error(bq,
++ "Overvolatge 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 */
++
++static enum power_supply_property bq2415x_power_supply_props[] = {
++ /* TODO: 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 = container_of(psy, struct bq2415x_device,
++ charger);
++ 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];
++
++ bq->charger.name = bq->name;
++ bq->charger.type = POWER_SUPPLY_TYPE_USB;
++ bq->charger.properties = bq2415x_power_supply_props;
++ bq->charger.num_properties = ARRAY_SIZE(bq2415x_power_supply_props);
++ bq->charger.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;
++ }
++
++ ret = power_supply_register(bq->dev, &bq->charger);
++ if (ret) {
++ kfree(bq->model);
++ return ret;
++ }
++
++ 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);
++}
++
++/* sysfs files */
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ 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;
++ else
++ return sprintf(buf, "%d\n", ret);
++}
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ 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;
++ else
++ return count;
++}
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++
++ if (bq->autotimer)
++ return sprintf(buf, "auto\n");
++ else
++ return sprintf(buf, "off\n");
++}
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ enum bq2415x_mode mode;
++ int ret = 0;
++
++ if (strncmp(buf, "auto", 4) == 0) {
++ if (bq->automode < 0)
++ return -ENOSYS;
++ bq->automode = 1;
++ mode = bq->charger_mode;
++ } 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)
++ bq->automode = 1;
++ return count;
++ } else
++ return -EINVAL;
++
++ ret = bq2415x_set_mode(bq, mode);
++ if (ret < 0)
++ return ret;
++ else
++ return count;
++}
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ ssize_t ret = 0;
++
++ if (bq->automode > 0)
++ ret += sprintf(buf+ret, "auto (");
++
++ switch (bq->mode) {
++ 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;
++}
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ ssize_t ret = 0;
++ char *end;
++ int reg;
++ int val;
++
++ reg = simple_strtol(buf, &end, 16);
++ if (reg < 0 || reg > 4)
++ return -EINVAL;
++
++ val = simple_strtol(end+1, NULL, 16);
++ if (val < 0 || val > 255)
++ return -EINVAL;
++
++ ret = bq2415x_i2c_write(bq, reg, val);
++ if (ret < 0)
++ return ret;
++ else
++ return count;
++}
++
++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);
++ else
++ return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
++}
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ 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;
++}
++
++/* Current & Volatage settings */
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ long val;
++ int ret;
++
++ if (strict_strtol(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;
++ else
++ return count;
++}
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ 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;
++ else
++ return sprintf(buf, "%d\n", ret);
++}
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ enum bq2415x_command command;
++ long val;
++ int ret;
++
++ if (strict_strtol(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;
++ else
++ return count;
++}
++
++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 = container_of(psy, struct bq2415x_device,
++ charger);
++ 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;
++ else
++ 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(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[] = {
++ &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_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);
++}
++
++/* bq2415x register */
++
++static int bq2415x_probe(struct i2c_client *client,
++ const struct i2c_device_id *id)
++{
++ int ret;
++ int num;
++ char *name;
++ struct bq2415x_device *bq;
++
++ if (!client->dev.platform_data) {
++ dev_err(&client->dev, "platform data not set\n");
++ return -ENODEV;
++ }
++
++ /* Get new ID for the new device */
++ ret = idr_pre_get(&bq2415x_id, GFP_KERNEL);
++ if (ret == 0)
++ return -ENOMEM;
++
++ mutex_lock(&bq2415x_id_mutex);
++ ret = idr_get_new(&bq2415x_id, client, &num);
++ mutex_unlock(&bq2415x_id_mutex);
++
++ if (ret < 0)
++ return ret;
++
++ name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
++ if (!name) {
++ dev_err(&client->dev, "failed to allocate device name\n");
++ ret = -ENOMEM;
++ goto error_1;
++ }
++
++ bq = kzalloc(sizeof(*bq), GFP_KERNEL);
++ if (!bq) {
++ dev_err(&client->dev, "failed to allocate device data\n");
++ ret = -ENOMEM;
++ goto error_2;
++ }
++
++ i2c_set_clientdata(client, bq);
++
++ bq->id = num;
++ bq->dev = &client->dev;
++ bq->chip = id->driver_data;
++ bq->name = name;
++ bq->mode = BQ2415X_MODE_NONE;
++ bq->charger_mode = BQ2415X_MODE_NONE;
++ bq->autotimer = 0;
++ bq->automode = 0;
++
++ memcpy(&bq->init_data, client->dev.platform_data,
++ 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_3;
++ }
++
++ ret = bq2415x_sysfs_init(bq);
++ if (ret) {
++ dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
++ goto error_4;
++ }
++
++ ret = bq2415x_set_defaults(bq);
++ if (ret) {
++ dev_err(bq->dev, "failed to set default values: %d\n", ret);
++ goto error_5;
++ }
++
++ if (bq->init_data.set_charger_type_hook) {
++ if (bq->init_data.set_charger_type_hook(
++ bq2415x_set_charger_type, bq)) {
++ bq->automode = 1;
++ dev_info(bq->dev, "automode enabled\n");
++ } else {
++ bq->automode = -1;
++ dev_info(bq->dev, "automode not supported\n");
++ }
++ } else {
++ bq->automode = -1;
++ dev_info(bq->dev, "automode not supported\n");
++ }
++
++ INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
++ bq2415x_set_autotimer(bq, 1);
++
++ dev_info(bq->dev, "driver registred\n");
++ return 0;
++
++error_5:
++ bq2415x_sysfs_exit(bq);
++error_4:
++ bq2415x_power_supply_exit(bq);
++error_3:
++ kfree(bq);
++error_2:
++ kfree(name);
++error_1:
++ mutex_lock(&bq2415x_id_mutex);
++ idr_remove(&bq2415x_id, num);
++ mutex_unlock(&bq2415x_id_mutex);
++
++ return ret;
++}
++
++/* bq2415x unregister */
++
++static int bq2415x_remove(struct i2c_client *client)
++{
++ struct bq2415x_device *bq = i2c_get_clientdata(client);
++
++ if (bq->init_data.set_charger_type_hook)
++ bq->init_data.set_charger_type_hook(NULL, NULL);
++
++ 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 unregistred\n");
++
++ kfree(bq->name);
++ kfree(bq);
++
++ 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 },
++ { "bq24158", BQ24158 },
++ {},
++};
++MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
++
++static struct i2c_driver bq2415x_driver = {
++ .driver = {
++ .name = "bq2415x-charger",
++ },
++ .probe = bq2415x_probe,
++ .remove = bq2415x_remove,
++ .id_table = bq2415x_i2c_id_table,
++};
++
++static int __init bq2415x_init(void)
++{
++ return i2c_add_driver(&bq2415x_driver);
++}
++module_init(bq2415x_init);
++
++static void __exit bq2415x_exit(void)
++{
++ i2c_del_driver(&bq2415x_driver);
++}
++module_exit(bq2415x_exit);
++
++MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
++MODULE_DESCRIPTION("bq2415x charger driver");
++MODULE_LICENSE("GPL");
+--- /dev/null 2012-04-29 08:55:34.366920721 +0200
++++ kernel-power/include/linux/power/bq2415x_charger.h 2012-01-27 15:47:45.689585447 +0100
+@@ -0,0 +1,78 @@
++/*
++ bq2415x_charger.h - bq2415x charger driver
++ Copyright (C) 2011-2012 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.
++
++ You should have received a copy of the GNU General Public License along
++ with this program; if not, write to the Free Software Foundation, Inc.,
++ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
++*/
++
++#ifndef BQ2415X_CHARGER_H
++#define BQ2415X_CHARGER_H
++
++/*
++ This is platform data for bq2415x chip. It contains default board volatages
++ and currents which can be also later configured via sysfs. If value is -1
++ then default chip value (specified in datasheet) will be used.
++
++ Value resistor_sense is needed for for configuring charge and termination
++ current. It it is less or equal to zero, configuring charge and termination
++ current will not be possible.
++
++ Function set_charger_type_hook is needed for automode (setting correct
++ current limit when charger is connected/disconnected). When is NULL,
++ automode function is disabled. When is not NULL, it must have this prototype:
++
++ int (*set_charger_type_hook)(void (*hook)(int type, void *data), void *data)
++
++ and bq2415x driver will call it as:
++
++ platform_data->set_charger_type_hook(bq_hook_function, bq_private_data);
++
++ Board/platform function set_charger_type_hook return non zero when hook
++ function was successfull registred. Platform code should call that hook
++ function (which get from pointer, with data) every time when charger was
++ connected/disconnected. bq driver then set correct current limit.
++
++ Hook function has this prototype:
++
++ void hook(int type, void *data);
++
++ type is:
++ 0 - for unknown or none charger (max current limit is 100mA)
++ 1 - for usb host/hub charger (max current limit is 500mA)
++ 2 - for dedicated charger (unlimited)
++
++ data is pointer to bq_private_data (which get from set_charger_type_hook)
++
++ When bq driver is being unloaded, it call function:
++
++ platform_data->set_charger_type_hook(NULL, NULL);
++
++ After thet board/platform code must not call bq hook function! It is
++ possible that pointer to hook function will not be valid.
++
++*/
++
++struct bq2415x_platform_data {
++ int current_limit; /* mA */
++ int weak_battery_voltage; /* mV */
++ int battery_regulation_voltage; /* mV */
++ int charge_current; /* mA */
++ int termination_current; /* mA */
++ int resistor_sense; /* m ohm */
++ int (*set_charger_type_hook)(void (*hook)(int type, void *data),
++ void *data);
++};
++
++#endif
+--- kernel-power/drivers/power/Makefile.orig 2012-04-29 18:03:10.751810073 +0200
++++ kernel-power/drivers/power/Makefile 2012-04-29 18:03:52.207808860 +0200
+@@ -25,3 +25,4 @@ obj-$(CONFIG_TWL4030_BCI_BATTERY) += twl
+ obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o
+ obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
+ obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
++obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
+--- kernel-power/drivers/power/Kconfig.orig 2012-04-29 18:01:48.819812466 +0200
++++ kernel-power/drivers/power/Kconfig 2012-04-29 18:03:06.043810209 +0200
+@@ -75,4 +75,10 @@ config BATTERY_BQ27x00
+ help
+ Say Y here to enable support for batteries with BQ27200(I2C) chip.
+
++config CHARGER_BQ2415X
++ tristate "BQ2415X charger driver"
++ depends on I2C
++ help
++ Say Y here to enable support for chargers with BQ2415X(I2C) chip.
++
+ endif # POWER_SUPPLY
projects / kernel-power / commitdiff