| /* |
| * Battery driver for One Laptop Per Child board. |
| * |
| * Copyright © 2006-2010 David Woodhouse <dwmw2@infradead.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/err.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/power_supply.h> |
| #include <linux/jiffies.h> |
| #include <linux/sched.h> |
| #include <linux/olpc-ec.h> |
| #include <asm/olpc.h> |
| |
| |
| #define EC_BAT_VOLTAGE 0x10 /* uint16_t, *9.76/32, mV */ |
| #define EC_BAT_CURRENT 0x11 /* int16_t, *15.625/120, mA */ |
| #define EC_BAT_ACR 0x12 /* int16_t, *6250/15, µAh */ |
| #define EC_BAT_TEMP 0x13 /* uint16_t, *100/256, °C */ |
| #define EC_AMB_TEMP 0x14 /* uint16_t, *100/256, °C */ |
| #define EC_BAT_STATUS 0x15 /* uint8_t, bitmask */ |
| #define EC_BAT_SOC 0x16 /* uint8_t, percentage */ |
| #define EC_BAT_SERIAL 0x17 /* uint8_t[6] */ |
| #define EC_BAT_EEPROM 0x18 /* uint8_t adr as input, uint8_t output */ |
| #define EC_BAT_ERRCODE 0x1f /* uint8_t, bitmask */ |
| |
| #define BAT_STAT_PRESENT 0x01 |
| #define BAT_STAT_FULL 0x02 |
| #define BAT_STAT_LOW 0x04 |
| #define BAT_STAT_DESTROY 0x08 |
| #define BAT_STAT_AC 0x10 |
| #define BAT_STAT_CHARGING 0x20 |
| #define BAT_STAT_DISCHARGING 0x40 |
| #define BAT_STAT_TRICKLE 0x80 |
| |
| #define BAT_ERR_INFOFAIL 0x02 |
| #define BAT_ERR_OVERVOLTAGE 0x04 |
| #define BAT_ERR_OVERTEMP 0x05 |
| #define BAT_ERR_GAUGESTOP 0x06 |
| #define BAT_ERR_OUT_OF_CONTROL 0x07 |
| #define BAT_ERR_ID_FAIL 0x09 |
| #define BAT_ERR_ACR_FAIL 0x10 |
| |
| #define BAT_ADDR_MFR_TYPE 0x5F |
| |
| /********************************************************************* |
| * Power |
| *********************************************************************/ |
| |
| static int olpc_ac_get_prop(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| int ret = 0; |
| uint8_t status; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_ONLINE: |
| ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1); |
| if (ret) |
| return ret; |
| |
| val->intval = !!(status & BAT_STAT_AC); |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| return ret; |
| } |
| |
| static enum power_supply_property olpc_ac_props[] = { |
| POWER_SUPPLY_PROP_ONLINE, |
| }; |
| |
| static struct power_supply olpc_ac = { |
| .name = "olpc-ac", |
| .type = POWER_SUPPLY_TYPE_MAINS, |
| .properties = olpc_ac_props, |
| .num_properties = ARRAY_SIZE(olpc_ac_props), |
| .get_property = olpc_ac_get_prop, |
| }; |
| |
| static char bat_serial[17]; /* Ick */ |
| |
| static int olpc_bat_get_status(union power_supply_propval *val, uint8_t ec_byte) |
| { |
| if (olpc_platform_info.ecver > 0x44) { |
| if (ec_byte & (BAT_STAT_CHARGING | BAT_STAT_TRICKLE)) |
| val->intval = POWER_SUPPLY_STATUS_CHARGING; |
| else if (ec_byte & BAT_STAT_DISCHARGING) |
| val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| else if (ec_byte & BAT_STAT_FULL) |
| val->intval = POWER_SUPPLY_STATUS_FULL; |
| else /* er,... */ |
| val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
| } else { |
| /* Older EC didn't report charge/discharge bits */ |
| if (!(ec_byte & BAT_STAT_AC)) /* No AC means discharging */ |
| val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| else if (ec_byte & BAT_STAT_FULL) |
| val->intval = POWER_SUPPLY_STATUS_FULL; |
| else /* Not _necessarily_ true but EC doesn't tell all yet */ |
| val->intval = POWER_SUPPLY_STATUS_CHARGING; |
| } |
| |
| return 0; |
| } |
| |
| static int olpc_bat_get_health(union power_supply_propval *val) |
| { |
| uint8_t ec_byte; |
| int ret; |
| |
| ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1); |
| if (ret) |
| return ret; |
| |
| switch (ec_byte) { |
| case 0: |
| val->intval = POWER_SUPPLY_HEALTH_GOOD; |
| break; |
| |
| case BAT_ERR_OVERTEMP: |
| val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; |
| break; |
| |
| case BAT_ERR_OVERVOLTAGE: |
| val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
| break; |
| |
| case BAT_ERR_INFOFAIL: |
| case BAT_ERR_OUT_OF_CONTROL: |
| case BAT_ERR_ID_FAIL: |
| case BAT_ERR_ACR_FAIL: |
| val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
| break; |
| |
| default: |
| /* Eep. We don't know this failure code */ |
| ret = -EIO; |
| } |
| |
| return ret; |
| } |
| |
| static int olpc_bat_get_mfr(union power_supply_propval *val) |
| { |
| uint8_t ec_byte; |
| int ret; |
| |
| ec_byte = BAT_ADDR_MFR_TYPE; |
| ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1); |
| if (ret) |
| return ret; |
| |
| switch (ec_byte >> 4) { |
| case 1: |
| val->strval = "Gold Peak"; |
| break; |
| case 2: |
| val->strval = "BYD"; |
| break; |
| default: |
| val->strval = "Unknown"; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int olpc_bat_get_tech(union power_supply_propval *val) |
| { |
| uint8_t ec_byte; |
| int ret; |
| |
| ec_byte = BAT_ADDR_MFR_TYPE; |
| ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1); |
| if (ret) |
| return ret; |
| |
| switch (ec_byte & 0xf) { |
| case 1: |
| val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH; |
| break; |
| case 2: |
| val->intval = POWER_SUPPLY_TECHNOLOGY_LiFe; |
| break; |
| default: |
| val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int olpc_bat_get_charge_full_design(union power_supply_propval *val) |
| { |
| uint8_t ec_byte; |
| union power_supply_propval tech; |
| int ret, mfr; |
| |
| ret = olpc_bat_get_tech(&tech); |
| if (ret) |
| return ret; |
| |
| ec_byte = BAT_ADDR_MFR_TYPE; |
| ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1); |
| if (ret) |
| return ret; |
| |
| mfr = ec_byte >> 4; |
| |
| switch (tech.intval) { |
| case POWER_SUPPLY_TECHNOLOGY_NiMH: |
| switch (mfr) { |
| case 1: /* Gold Peak */ |
| val->intval = 3000000*.8; |
| break; |
| default: |
| return -EIO; |
| } |
| break; |
| |
| case POWER_SUPPLY_TECHNOLOGY_LiFe: |
| switch (mfr) { |
| case 1: /* Gold Peak, fall through */ |
| case 2: /* BYD */ |
| val->intval = 2800000; |
| break; |
| default: |
| return -EIO; |
| } |
| break; |
| |
| default: |
| return -EIO; |
| } |
| |
| return ret; |
| } |
| |
| static int olpc_bat_get_charge_now(union power_supply_propval *val) |
| { |
| uint8_t soc; |
| union power_supply_propval full; |
| int ret; |
| |
| ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &soc, 1); |
| if (ret) |
| return ret; |
| |
| ret = olpc_bat_get_charge_full_design(&full); |
| if (ret) |
| return ret; |
| |
| val->intval = soc * (full.intval / 100); |
| return 0; |
| } |
| |
| static int olpc_bat_get_voltage_max_design(union power_supply_propval *val) |
| { |
| uint8_t ec_byte; |
| union power_supply_propval tech; |
| int mfr; |
| int ret; |
| |
| ret = olpc_bat_get_tech(&tech); |
| if (ret) |
| return ret; |
| |
| ec_byte = BAT_ADDR_MFR_TYPE; |
| ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1); |
| if (ret) |
| return ret; |
| |
| mfr = ec_byte >> 4; |
| |
| switch (tech.intval) { |
| case POWER_SUPPLY_TECHNOLOGY_NiMH: |
| switch (mfr) { |
| case 1: /* Gold Peak */ |
| val->intval = 6000000; |
| break; |
| default: |
| return -EIO; |
| } |
| break; |
| |
| case POWER_SUPPLY_TECHNOLOGY_LiFe: |
| switch (mfr) { |
| case 1: /* Gold Peak */ |
| val->intval = 6400000; |
| break; |
| case 2: /* BYD */ |
| val->intval = 6500000; |
| break; |
| default: |
| return -EIO; |
| } |
| break; |
| |
| default: |
| return -EIO; |
| } |
| |
| return ret; |
| } |
| |
| /********************************************************************* |
| * Battery properties |
| *********************************************************************/ |
| static int olpc_bat_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| int ret = 0; |
| __be16 ec_word; |
| uint8_t ec_byte; |
| __be64 ser_buf; |
| |
| ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1); |
| if (ret) |
| return ret; |
| |
| /* Theoretically there's a race here -- the battery could be |
| removed immediately after we check whether it's present, and |
| then we query for some other property of the now-absent battery. |
| It doesn't matter though -- the EC will return the last-known |
| information, and it's as if we just ran that _little_ bit faster |
| and managed to read it out before the battery went away. */ |
| if (!(ec_byte & (BAT_STAT_PRESENT | BAT_STAT_TRICKLE)) && |
| psp != POWER_SUPPLY_PROP_PRESENT) |
| return -ENODEV; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_STATUS: |
| ret = olpc_bat_get_status(val, ec_byte); |
| if (ret) |
| return ret; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_TYPE: |
| if (ec_byte & BAT_STAT_TRICKLE) |
| val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; |
| else if (ec_byte & BAT_STAT_CHARGING) |
| val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; |
| else |
| val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; |
| break; |
| case POWER_SUPPLY_PROP_PRESENT: |
| val->intval = !!(ec_byte & (BAT_STAT_PRESENT | |
| BAT_STAT_TRICKLE)); |
| break; |
| |
| case POWER_SUPPLY_PROP_HEALTH: |
| if (ec_byte & BAT_STAT_DESTROY) |
| val->intval = POWER_SUPPLY_HEALTH_DEAD; |
| else { |
| ret = olpc_bat_get_health(val); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case POWER_SUPPLY_PROP_MANUFACTURER: |
| ret = olpc_bat_get_mfr(val); |
| if (ret) |
| return ret; |
| break; |
| case POWER_SUPPLY_PROP_TECHNOLOGY: |
| ret = olpc_bat_get_tech(val); |
| if (ret) |
| return ret; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_AVG: |
| case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2); |
| if (ret) |
| return ret; |
| |
| val->intval = (s16)be16_to_cpu(ec_word) * 9760L / 32; |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_AVG: |
| case POWER_SUPPLY_PROP_CURRENT_NOW: |
| ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2); |
| if (ret) |
| return ret; |
| |
| val->intval = (s16)be16_to_cpu(ec_word) * 15625L / 120; |
| break; |
| case POWER_SUPPLY_PROP_CAPACITY: |
| ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1); |
| if (ret) |
| return ret; |
| val->intval = ec_byte; |
| break; |
| case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
| if (ec_byte & BAT_STAT_FULL) |
| val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
| else if (ec_byte & BAT_STAT_LOW) |
| val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
| else |
| val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
| ret = olpc_bat_get_charge_full_design(val); |
| if (ret) |
| return ret; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_NOW: |
| ret = olpc_bat_get_charge_now(val); |
| if (ret) |
| return ret; |
| break; |
| case POWER_SUPPLY_PROP_TEMP: |
| ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2); |
| if (ret) |
| return ret; |
| |
| val->intval = (s16)be16_to_cpu(ec_word) * 100 / 256; |
| break; |
| case POWER_SUPPLY_PROP_TEMP_AMBIENT: |
| ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2); |
| if (ret) |
| return ret; |
| |
| val->intval = (int)be16_to_cpu(ec_word) * 100 / 256; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_COUNTER: |
| ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2); |
| if (ret) |
| return ret; |
| |
| val->intval = (s16)be16_to_cpu(ec_word) * 6250 / 15; |
| break; |
| case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
| ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8); |
| if (ret) |
| return ret; |
| |
| sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf)); |
| val->strval = bat_serial; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
| ret = olpc_bat_get_voltage_max_design(val); |
| if (ret) |
| return ret; |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static enum power_supply_property olpc_xo1_bat_props[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_CHARGE_TYPE, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| POWER_SUPPLY_PROP_VOLTAGE_AVG, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_CURRENT_AVG, |
| POWER_SUPPLY_PROP_CURRENT_NOW, |
| POWER_SUPPLY_PROP_CAPACITY, |
| POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
| POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
| POWER_SUPPLY_PROP_CHARGE_NOW, |
| POWER_SUPPLY_PROP_TEMP, |
| POWER_SUPPLY_PROP_TEMP_AMBIENT, |
| POWER_SUPPLY_PROP_MANUFACTURER, |
| POWER_SUPPLY_PROP_SERIAL_NUMBER, |
| POWER_SUPPLY_PROP_CHARGE_COUNTER, |
| POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, |
| }; |
| |
| /* XO-1.5 does not have ambient temperature property */ |
| static enum power_supply_property olpc_xo15_bat_props[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_CHARGE_TYPE, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| POWER_SUPPLY_PROP_VOLTAGE_AVG, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_CURRENT_AVG, |
| POWER_SUPPLY_PROP_CURRENT_NOW, |
| POWER_SUPPLY_PROP_CAPACITY, |
| POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
| POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
| POWER_SUPPLY_PROP_CHARGE_NOW, |
| POWER_SUPPLY_PROP_TEMP, |
| POWER_SUPPLY_PROP_MANUFACTURER, |
| POWER_SUPPLY_PROP_SERIAL_NUMBER, |
| POWER_SUPPLY_PROP_CHARGE_COUNTER, |
| POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, |
| }; |
| |
| /* EEPROM reading goes completely around the power_supply API, sadly */ |
| |
| #define EEPROM_START 0x20 |
| #define EEPROM_END 0x80 |
| #define EEPROM_SIZE (EEPROM_END - EEPROM_START) |
| |
| static ssize_t olpc_bat_eeprom_read(struct file *filp, struct kobject *kobj, |
| struct bin_attribute *attr, char *buf, loff_t off, size_t count) |
| { |
| uint8_t ec_byte; |
| int ret; |
| int i; |
| |
| if (off >= EEPROM_SIZE) |
| return 0; |
| if (off + count > EEPROM_SIZE) |
| count = EEPROM_SIZE - off; |
| |
| for (i = 0; i < count; i++) { |
| ec_byte = EEPROM_START + off + i; |
| ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &buf[i], 1); |
| if (ret) { |
| pr_err("olpc-battery: " |
| "EC_BAT_EEPROM cmd @ 0x%x failed - %d!\n", |
| ec_byte, ret); |
| return -EIO; |
| } |
| } |
| |
| return count; |
| } |
| |
| static struct bin_attribute olpc_bat_eeprom = { |
| .attr = { |
| .name = "eeprom", |
| .mode = S_IRUGO, |
| }, |
| .size = 0, |
| .read = olpc_bat_eeprom_read, |
| }; |
| |
| /* Allow userspace to see the specific error value pulled from the EC */ |
| |
| static ssize_t olpc_bat_error_read(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| uint8_t ec_byte; |
| ssize_t ret; |
| |
| ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1); |
| if (ret < 0) |
| return ret; |
| |
| return sprintf(buf, "%d\n", ec_byte); |
| } |
| |
| static struct device_attribute olpc_bat_error = { |
| .attr = { |
| .name = "error", |
| .mode = S_IRUGO, |
| }, |
| .show = olpc_bat_error_read, |
| }; |
| |
| /********************************************************************* |
| * Initialisation |
| *********************************************************************/ |
| |
| static struct power_supply olpc_bat = { |
| .name = "olpc-battery", |
| .get_property = olpc_bat_get_property, |
| .use_for_apm = 1, |
| }; |
| |
| static int olpc_battery_suspend(struct platform_device *pdev, |
| pm_message_t state) |
| { |
| if (device_may_wakeup(olpc_ac.dev)) |
| olpc_ec_wakeup_set(EC_SCI_SRC_ACPWR); |
| else |
| olpc_ec_wakeup_clear(EC_SCI_SRC_ACPWR); |
| |
| if (device_may_wakeup(olpc_bat.dev)) |
| olpc_ec_wakeup_set(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC |
| | EC_SCI_SRC_BATERR); |
| else |
| olpc_ec_wakeup_clear(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC |
| | EC_SCI_SRC_BATERR); |
| |
| return 0; |
| } |
| |
| static int olpc_battery_probe(struct platform_device *pdev) |
| { |
| int ret; |
| uint8_t status; |
| |
| /* |
| * We've seen a number of EC protocol changes; this driver requires |
| * the latest EC protocol, supported by 0x44 and above. |
| */ |
| if (olpc_platform_info.ecver < 0x44) { |
| printk(KERN_NOTICE "OLPC EC version 0x%02x too old for " |
| "battery driver.\n", olpc_platform_info.ecver); |
| return -ENXIO; |
| } |
| |
| ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1); |
| if (ret) |
| return ret; |
| |
| /* Ignore the status. It doesn't actually matter */ |
| |
| ret = power_supply_register(&pdev->dev, &olpc_ac); |
| if (ret) |
| return ret; |
| |
| if (olpc_board_at_least(olpc_board_pre(0xd0))) { /* XO-1.5 */ |
| olpc_bat.properties = olpc_xo15_bat_props; |
| olpc_bat.num_properties = ARRAY_SIZE(olpc_xo15_bat_props); |
| } else { /* XO-1 */ |
| olpc_bat.properties = olpc_xo1_bat_props; |
| olpc_bat.num_properties = ARRAY_SIZE(olpc_xo1_bat_props); |
| } |
| |
| ret = power_supply_register(&pdev->dev, &olpc_bat); |
| if (ret) |
| goto battery_failed; |
| |
| ret = device_create_bin_file(olpc_bat.dev, &olpc_bat_eeprom); |
| if (ret) |
| goto eeprom_failed; |
| |
| ret = device_create_file(olpc_bat.dev, &olpc_bat_error); |
| if (ret) |
| goto error_failed; |
| |
| if (olpc_ec_wakeup_available()) { |
| device_set_wakeup_capable(olpc_ac.dev, true); |
| device_set_wakeup_capable(olpc_bat.dev, true); |
| } |
| |
| return 0; |
| |
| error_failed: |
| device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom); |
| eeprom_failed: |
| power_supply_unregister(&olpc_bat); |
| battery_failed: |
| power_supply_unregister(&olpc_ac); |
| return ret; |
| } |
| |
| static int __devexit olpc_battery_remove(struct platform_device *pdev) |
| { |
| device_remove_file(olpc_bat.dev, &olpc_bat_error); |
| device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom); |
| power_supply_unregister(&olpc_bat); |
| power_supply_unregister(&olpc_ac); |
| return 0; |
| } |
| |
| static const struct of_device_id olpc_battery_ids[] __devinitconst = { |
| { .compatible = "olpc,xo1-battery" }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(of, olpc_battery_ids); |
| |
| static struct platform_driver olpc_battery_driver = { |
| .driver = { |
| .name = "olpc-battery", |
| .owner = THIS_MODULE, |
| .of_match_table = olpc_battery_ids, |
| }, |
| .probe = olpc_battery_probe, |
| .remove = olpc_battery_remove, |
| .suspend = olpc_battery_suspend, |
| }; |
| |
| module_platform_driver(olpc_battery_driver); |
| |
| MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("Battery driver for One Laptop Per Child 'XO' machine"); |