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-rw-r--r--drivers/power/Kconfig8
-rw-r--r--drivers/power/Makefile3
-rw-r--r--drivers/power/max17040_battery.c309
-rw-r--r--include/linux/max17040_battery.h19
4 files changed, 338 insertions, 1 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 33da1127992a..7eda34838bfe 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -82,6 +82,14 @@ config BATTERY_DA9030
82 Say Y here to enable support for batteries charger integrated into 82 Say Y here to enable support for batteries charger integrated into
83 DA9030 PMIC. 83 DA9030 PMIC.
84 84
85config BATTERY_MAX17040
86 tristate "Maxim MAX17040 Fuel Gauge"
87 depends on I2C
88 help
89 MAX17040 is fuel-gauge systems for lithium-ion (Li+) batteries
90 in handheld and portable equipment. The MAX17040 is configured
91 to operate with a single lithium cell
92
85config CHARGER_PCF50633 93config CHARGER_PCF50633
86 tristate "NXP PCF50633 MBC" 94 tristate "NXP PCF50633 MBC"
87 depends on MFD_PCF50633 95 depends on MFD_PCF50633
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 2fcf41d13e5c..daf3179689aa 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -25,4 +25,5 @@ obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o
25obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o 25obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
26obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o 26obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
27obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o 27obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
28obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o \ No newline at end of file 28obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
29obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
diff --git a/drivers/power/max17040_battery.c b/drivers/power/max17040_battery.c
new file mode 100644
index 000000000000..87b98bf27ae1
--- /dev/null
+++ b/drivers/power/max17040_battery.c
@@ -0,0 +1,309 @@
1/*
2 * max17040_battery.c
3 * fuel-gauge systems for lithium-ion (Li+) batteries
4 *
5 * Copyright (C) 2009 Samsung Electronics
6 * Minkyu Kang <mk7.kang@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/platform_device.h>
16#include <linux/mutex.h>
17#include <linux/err.h>
18#include <linux/i2c.h>
19#include <linux/delay.h>
20#include <linux/power_supply.h>
21#include <linux/max17040_battery.h>
22
23#define MAX17040_VCELL_MSB 0x02
24#define MAX17040_VCELL_LSB 0x03
25#define MAX17040_SOC_MSB 0x04
26#define MAX17040_SOC_LSB 0x05
27#define MAX17040_MODE_MSB 0x06
28#define MAX17040_MODE_LSB 0x07
29#define MAX17040_VER_MSB 0x08
30#define MAX17040_VER_LSB 0x09
31#define MAX17040_RCOMP_MSB 0x0C
32#define MAX17040_RCOMP_LSB 0x0D
33#define MAX17040_CMD_MSB 0xFE
34#define MAX17040_CMD_LSB 0xFF
35
36#define MAX17040_DELAY 1000
37#define MAX17040_BATTERY_FULL 95
38
39struct max17040_chip {
40 struct i2c_client *client;
41 struct delayed_work work;
42 struct power_supply battery;
43 struct max17040_platform_data *pdata;
44
45 /* State Of Connect */
46 int online;
47 /* battery voltage */
48 int vcell;
49 /* battery capacity */
50 int soc;
51 /* State Of Charge */
52 int status;
53};
54
55static int max17040_get_property(struct power_supply *psy,
56 enum power_supply_property psp,
57 union power_supply_propval *val)
58{
59 struct max17040_chip *chip = container_of(psy,
60 struct max17040_chip, battery);
61
62 switch (psp) {
63 case POWER_SUPPLY_PROP_STATUS:
64 val->intval = chip->status;
65 break;
66 case POWER_SUPPLY_PROP_ONLINE:
67 val->intval = chip->online;
68 break;
69 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
70 val->intval = chip->vcell;
71 break;
72 case POWER_SUPPLY_PROP_CAPACITY:
73 val->intval = chip->soc;
74 break;
75 default:
76 return -EINVAL;
77 }
78 return 0;
79}
80
81static int max17040_write_reg(struct i2c_client *client, int reg, u8 value)
82{
83 int ret;
84
85 ret = i2c_smbus_write_byte_data(client, reg, value);
86
87 if (ret < 0)
88 dev_err(&client->dev, "%s: err %d\n", __func__, ret);
89
90 return ret;
91}
92
93static int max17040_read_reg(struct i2c_client *client, int reg)
94{
95 int ret;
96
97 ret = i2c_smbus_read_byte_data(client, reg);
98
99 if (ret < 0)
100 dev_err(&client->dev, "%s: err %d\n", __func__, ret);
101
102 return ret;
103}
104
105static void max17040_reset(struct i2c_client *client)
106{
107 max17040_write_reg(client, MAX17040_CMD_MSB, 0x54);
108 max17040_write_reg(client, MAX17040_CMD_LSB, 0x00);
109}
110
111static void max17040_get_vcell(struct i2c_client *client)
112{
113 struct max17040_chip *chip = i2c_get_clientdata(client);
114 u8 msb;
115 u8 lsb;
116
117 msb = max17040_read_reg(client, MAX17040_VCELL_MSB);
118 lsb = max17040_read_reg(client, MAX17040_VCELL_LSB);
119
120 chip->vcell = (msb << 4) + (lsb >> 4);
121}
122
123static void max17040_get_soc(struct i2c_client *client)
124{
125 struct max17040_chip *chip = i2c_get_clientdata(client);
126 u8 msb;
127 u8 lsb;
128
129 msb = max17040_read_reg(client, MAX17040_SOC_MSB);
130 lsb = max17040_read_reg(client, MAX17040_SOC_LSB);
131
132 chip->soc = msb;
133}
134
135static void max17040_get_version(struct i2c_client *client)
136{
137 u8 msb;
138 u8 lsb;
139
140 msb = max17040_read_reg(client, MAX17040_VER_MSB);
141 lsb = max17040_read_reg(client, MAX17040_VER_LSB);
142
143 dev_info(&client->dev, "MAX17040 Fuel-Gauge Ver %d%d\n", msb, lsb);
144}
145
146static void max17040_get_online(struct i2c_client *client)
147{
148 struct max17040_chip *chip = i2c_get_clientdata(client);
149
150 if (chip->pdata->battery_online)
151 chip->online = chip->pdata->battery_online();
152 else
153 chip->online = 1;
154}
155
156static void max17040_get_status(struct i2c_client *client)
157{
158 struct max17040_chip *chip = i2c_get_clientdata(client);
159
160 if (!chip->pdata->charger_online || !chip->pdata->charger_enable) {
161 chip->status = POWER_SUPPLY_STATUS_UNKNOWN;
162 return;
163 }
164
165 if (chip->pdata->charger_online()) {
166 if (chip->pdata->charger_enable())
167 chip->status = POWER_SUPPLY_STATUS_CHARGING;
168 else