From 3c7d09fdc15ebef4611693296e7f099f8871c5e8 Mon Sep 17 00:00:00 2001 From: Tao Huang Date: Mon, 5 Nov 2018 14:38:35 +0800 Subject: [PATCH] drivers/power: remove unused stc3100_battery driver Change-Id: Ie49b46699415599e06ea4340ff8aa15b5441f376 Signed-off-by: Tao Huang --- drivers/power/stc3100_battery.c | 309 -------------------------------- 1 file changed, 309 deletions(-) delete mode 100644 drivers/power/stc3100_battery.c diff --git a/drivers/power/stc3100_battery.c b/drivers/power/stc3100_battery.c deleted file mode 100644 index 222efa12e28b..000000000000 --- a/drivers/power/stc3100_battery.c +++ /dev/null @@ -1,309 +0,0 @@ -/* drivers/power/stc3100_battery - * STC31000 battery driver - * - * Copyright (C) 2009 Rockchip Corporation. - * - * This package 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. - * - * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. - * - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#define DRIVER_VERSION "1.0.0" - - -#define DC_CHECKPIN RK29_PIN4_PA4 ///da check charge pin -#define BATTAERY_CAPACITY_MAH 2000 /// define battery capacity mah -#define RSENSE_RESISTANCE 10 /// Rsense resistance m¦¸ - -#define STC3100_REG_MODE 0x00 -#define STC3100_REG_CTRL 0x01 -#define STC3100_REG_RSOCL 0x02 /* Relative State-of-Charge */ -#define STC3100_REG_RSOCH 0x03 -#define STC3100_REG_AIL 0x06 -#define STC3100_REG_AIH 0x07 -#define STC3100_REG_VOLTL 0x08 -#define STC3100_REG_VOLTH 0x09 -#define STC3100_REG_TEMPL 0x0A -#define STC3100_REG_TEMPH 0x0B - -#define STC3100_SPEED 300 * 1000 - -struct stc3100_device_info { - struct device *dev; - struct power_supply bat; - struct delayed_work work; - unsigned int interval; - struct i2c_client *client; -}; - -static enum power_supply_property stc3100_battery_props[] = { - POWER_SUPPLY_PROP_PRESENT, - POWER_SUPPLY_PROP_VOLTAGE_NOW, - POWER_SUPPLY_PROP_CURRENT_NOW, - POWER_SUPPLY_PROP_CAPACITY, - POWER_SUPPLY_PROP_TEMP, -}; - - -static int stc3100_write_regs(struct i2c_client *client, u8 reg, u8 const buf[], __u16 len) -{ - int ret; - ret = i2c_master_reg8_send(client, reg, buf, (int)len, STC3100_SPEED); - return ret; -} -/* - * Common code for STC3100 devices read - */ -static int stc3100_read_regs(struct i2c_client *client, u8 reg, u8 buf[], unsigned len) -{ - int ret; - ret = i2c_master_reg8_recv(client, reg, buf, len, STC3100_SPEED); - return ret; -} - -/* - * Return the battery temperature in Celsius degrees - * Or < 0 if something fails. - */ -static int stc3100_battery_temperature(struct stc3100_device_info *di) -{ - int ret; - u8 regs[2]; - - ret = stc3100_read_regs(di->client,STC3100_REG_TEMPL,regs,2); - if (ret<0) { - dev_err(di->dev, "error reading temperature\n"); - return ret; - } - - return (((((int)regs[1]&0xf)<<8) & (int)regs[0])>>3); ///temperature (¡ãC) = Temperature_code * 0.125. -} - -/* - * Return the battery Voltage in milivolts - * Or < 0 if something fails. - */ -static int stc3100_battery_voltage(struct stc3100_device_info *di) -{ - int ret; - u8 regs[2]; - - ret = stc3100_read_regs(di->client,STC3100_REG_VOLTL,regs,2); - if (ret<0) { - dev_err(di->dev, "error reading voltage\n"); - return ret; - } - - return (((((int)regs[1]&0xf)<<8) & (int)regs[0])*61/25); //voltage (mV) = Voltage_code * 2.44. -} - -/* - * Return the battery average current - * Note that current can be negative signed as well - * Or 0 if something fails. - */ -static int stc3100_battery_current(struct stc3100_device_info *di) -{ - int ret; - u8 regs[2]; - - ret = stc3100_read_regs(di->client,STC3100_REG_AIL,regs,2); - if (ret<0) { - dev_err(di->dev, "error reading current\n"); - return 0; - } - - return (((((int)regs[1]&0xf)<<8) & (int)regs[0])*1177/(100*RSENSE_RESISTANCE)); ///current (mA) = current_code* 11.77 / Rsense (m¦¸) -} - -/* - * Return the battery Relative State-of-Charge - * Or < 0 if something fails. - */ -static int stc3100_battery_rsoc(struct stc3100_device_info *di) -{ - int ret; - u8 regs[2]; - - ret = stc3100_read_regs(di->client,STC3100_REG_RSOCL,regs,2); - if (ret<0) { - dev_err(di->dev, "error reading relative State-of-Charge\n"); - return ret; - } - - return (((((int)regs[1])<<8) & (int)regs[0])*67/(10*RSENSE_RESISTANCE))*100/BATTAERY_CAPACITY_MAH; ////charge data (mA.h) = 6.70 * charge_code / Rsense (m¦¸). -} - -static int dc_charge_status(void) -{ - if(gpio_get_value(DC_CHECKPIN)) - return POWER_SUPPLY_STATUS_CHARGING; - else - return POWER_SUPPLY_STATUS_NOT_CHARGING; -} - -static int stc3100_battery_get_property(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - struct stc3100_device_info *di = container_of(psy, struct stc3100_device_info, bat); - - switch (psp) { - case POWER_SUPPLY_PROP_STATUS: - val->intval = dc_charge_status(); - break; - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - case POWER_SUPPLY_PROP_PRESENT: - val->intval = stc3100_battery_voltage(di); - if (psp == POWER_SUPPLY_PROP_PRESENT) - val->intval = val->intval <= 0 ? 0 : 1; - break; - case POWER_SUPPLY_PROP_CURRENT_NOW: - val->intval = stc3100_battery_current(di); - break; - case POWER_SUPPLY_PROP_CAPACITY: - val->intval = stc3100_battery_rsoc(di); - break; - case POWER_SUPPLY_PROP_TEMP: - val->intval = stc3100_battery_temperature(di); - break; - default: - return -EINVAL; - } - - return 0; -} - -static void stc3100_powersupply_init(struct stc3100_device_info *di) -{ - di->bat.type = POWER_SUPPLY_TYPE_BATTERY; - di->bat.properties = stc3100_battery_props; - di->bat.num_properties = ARRAY_SIZE(stc3100_battery_props); - di->bat.get_property = stc3100_battery_get_property; - di->bat.external_power_changed = NULL; -} - -static void stc3100_battery_update_status(struct stc3100_device_info *di) -{ - power_supply_changed(&di->bat); -} - -static void stc3100_battery_work(struct work_struct *work) -{ - struct stc3100_device_info *di = container_of(work, struct stc3100_device_info, work.work); - - stc3100_battery_update_status(di); - /* reschedule for the next time */ - schedule_delayed_work(&di->work, di->interval); -} - -static int stc3100_battery_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct stc3100_device_info *di; - int retval = 0; - u8 regs[2] = {0x10,0x1d}; ///init regs mode ctrl - - di = kzalloc(sizeof(*di), GFP_KERNEL); - if (!di) { - dev_err(&client->dev, "failed to allocate device info data\n"); - retval = -ENOMEM; - goto batt_failed_2; - } - - i2c_set_clientdata(client, di); - di->dev = &client->dev; - di->bat.name = "stc3100-battery"; - di->client = client; - stc3100_write_regs(client, STC3100_REG_MODE, regs, 2); - /* 4 seconds between monotor runs interval */ - di->interval = msecs_to_jiffies(4 * 1000); - stc3100_powersupply_init(di); - - retval = power_supply_register(&client->dev, &di->bat); - if (retval) { - dev_err(&client->dev, "failed to register battery\n"); - goto batt_failed_3; - } - - INIT_DELAYED_WORK(&di->work, stc3100_battery_work); - schedule_delayed_work(&di->work, di->interval); - - dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION); - - return 0; - -batt_failed_3: - kfree(di); -batt_failed_2: - return retval; -} - -static int stc3100_battery_remove(struct i2c_client *client) -{ - struct stc3100_device_info *di = i2c_get_clientdata(client); - - cancel_delayed_work_sync(&di->work); - power_supply_unregister(&di->bat); - - kfree(di->bat.name); - - kfree(di); - - return 0; -} - -/* - * Module stuff - */ - -static const struct i2c_device_id stc3100_id[] = { - { "stc3100", 0 }, - {}, -}; - -static struct i2c_driver stc3100_battery_driver = { - .driver = { - .name = "stc3100-battery", - }, - .probe = stc3100_battery_probe, - .remove = stc3100_battery_remove, - .id_table = stc3100_id, -}; - -static int __init stc3100_battery_init(void) -{ - int ret; - - ret = i2c_add_driver(&stc3100_battery_driver); - if (ret) - printk(KERN_ERR "Unable to register BQ27200 driver\n"); - - return ret; -} -module_init(stc3100_battery_init); - -static void __exit stc3100_battery_exit(void) -{ - i2c_del_driver(&stc3100_battery_driver); -} -module_exit(stc3100_battery_exit); - -MODULE_AUTHOR("Rodolfo Giometti "); -MODULE_DESCRIPTION("BQ27x00 battery monitor driver"); -MODULE_LICENSE("GPL");