shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 03:40:35 +09:00
Code Issues Packages Projects Releases Wiki Activity

drivers/power: remove unused stc3100_battery driver

Browse Source 
Change-Id: Ie49b46699415599e06ea4340ff8aa15b5441f376
Signed-off-by: Tao Huang <huangtao@rock-chips.com>
This commit is contained in:
Tao Huang
2018-11-05 14:38:35 +08:00
parent b4734349c1
commit 3c7d09fdc1
1 changed files with 0 additions and 309 deletions
Download Patch File Download Diff File Expand all files Collapse all files

309
drivers/power/stc3100_battery.c
View File

@@ -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 <linux/module.h>
#include <linux/param.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/idr.h>
#include <linux/i2c.h>
#include <asm/unaligned.h>
#include <mach/gpio.h>
#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<><6D>
#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 (<28><>C) = 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<><6D>)
}
/*
* 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<><6D>).
}
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 <giometti@linux.it>");
MODULE_DESCRIPTION("BQ27x00 battery monitor driver");
MODULE_LICENSE("GPL");