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-rw-r--r--drivers/power/Kconfig4
-rw-r--r--drivers/power/bq27x00_battery.c77
2 files changed, 51 insertions, 30 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index d4b3d67f0548..bf1467213954 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -98,10 +98,10 @@ config BATTERY_WM97XX
Say Y to enable support for battery measured by WM97xx aux port.
config BATTERY_BQ27x00
- tristate "BQ27200 battery driver"
+ tristate "BQ27x00 battery driver"
depends on I2C
help
- Say Y here to enable support for batteries with BQ27200(I2C) chip.
+ Say Y here to enable support for batteries with BQ27x00 (I2C) chips.
config BATTERY_DA9030
tristate "DA9030 battery driver"
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index 3da9e0aa705a..1526d020cbc6 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -26,14 +26,17 @@
#include <linux/i2c.h>
#include <asm/unaligned.h>
-#define DRIVER_VERSION "1.0.0"
+#define DRIVER_VERSION "1.1.0"
#define BQ27x00_REG_TEMP 0x06
#define BQ27x00_REG_VOLT 0x08
-#define BQ27x00_REG_RSOC 0x0B /* Relative State-of-Charge */
#define BQ27x00_REG_AI 0x14
#define BQ27x00_REG_FLAGS 0x0A
+#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */
+
+#define BQ27500_REG_SOC 0x2c
+
/* If the system has several batteries we need a different name for each
* of them...
*/
@@ -46,11 +49,14 @@ struct bq27x00_access_methods {
struct bq27x00_device_info *di);
};
+enum bq27x00_chip { BQ27000, BQ27500 };
+
struct bq27x00_device_info {
struct device *dev;
int id;
struct bq27x00_access_methods *bus;
struct power_supply bat;
+ enum bq27x00_chip chip;
struct i2c_client *client;
};
@@ -88,7 +94,10 @@ static int bq27x00_battery_temperature(struct bq27x00_device_info *di)
return ret;
}
- return ((temp >> 2) - 273) * 10;
+ if (di->chip == BQ27500)
+ return temp - 2731;
+ else
+ return ((temp >> 2) - 273) * 10;
}
/*
@@ -125,15 +134,22 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di)
dev_err(di->dev, "error reading current\n");
return 0;
}
- ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di);
- if (ret < 0) {
- dev_err(di->dev, "error reading flags\n");
- return 0;
- }
- if ((flags & (1 << 7)) != 0) {
- dev_dbg(di->dev, "negative current!\n");
- return -curr;
+
+ if (di->chip == BQ27500) {
+ /* bq27500 returns signed value */
+ curr = (int)(s16)curr;
+ } else {
+ ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di);
+ if (ret < 0) {
+ dev_err(di->dev, "error reading flags\n");
+ return 0;
+ }
+ if ((flags & (1 << 7)) != 0) {
+ dev_dbg(di->dev, "negative current!\n");
+ return -curr;
+ }
}
+
return curr;
}
@@ -146,7 +162,10 @@ static int bq27x00_battery_rsoc(struct bq27x00_device_info *di)
int ret;
int rsoc = 0;
- ret = bq27x00_read(BQ27x00_REG_RSOC, &rsoc, 1, di);
+ if (di->chip == BQ27500)
+ ret = bq27x00_read(BQ27500_REG_SOC, &rsoc, 0, di);
+ else
+ ret = bq27x00_read(BQ27000_REG_RSOC, &rsoc, 1, di);
if (ret) {
dev_err(di->dev, "error reading relative State-of-Charge\n");
return ret;
@@ -197,10 +216,10 @@ static void bq27x00_powersupply_init(struct bq27x00_device_info *di)
}
/*
- * BQ27200 specific code
+ * i2c specific code
*/
-static int bq27200_read(u8 reg, int *rt_value, int b_single,
+static int bq27x00_read_i2c(u8 reg, int *rt_value, int b_single,
struct bq27x00_device_info *di)
{
struct i2c_client *client = di->client;
@@ -239,7 +258,7 @@ static int bq27200_read(u8 reg, int *rt_value, int b_single,
return err;
}
-static int bq27200_battery_probe(struct i2c_client *client,
+static int bq27x00_battery_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
char *name;
@@ -258,7 +277,7 @@ static int bq27200_battery_probe(struct i2c_client *client,
if (retval < 0)
return retval;
- name = kasprintf(GFP_KERNEL, "bq27200-%d", num);
+ name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
if (!name) {
dev_err(&client->dev, "failed to allocate device name\n");
retval = -ENOMEM;
@@ -272,6 +291,7 @@ static int bq27200_battery_probe(struct i2c_client *client,
goto batt_failed_2;
}
di->id = num;
+ di->chip = id->driver_data;
bus = kzalloc(sizeof(*bus), GFP_KERNEL);
if (!bus) {
@@ -284,7 +304,7 @@ static int bq27200_battery_probe(struct i2c_client *client,
i2c_set_clientdata(client, di);
di->dev = &client->dev;
di->bat.name = name;
- bus->read = &bq27200_read;
+ bus->read = &bq27x00_read_i2c;
di->bus = bus;
di->client = client;
@@ -314,7 +334,7 @@ batt_failed_1:
return retval;
}
-static int bq27200_battery_remove(struct i2c_client *client)
+static int bq27x00_battery_remove(struct i2c_client *client)
{
struct bq27x00_device_info *di = i2c_get_clientdata(client);
@@ -335,27 +355,28 @@ static int bq27200_battery_remove(struct i2c_client *client)
* Module stuff
*/
-static const struct i2c_device_id bq27200_id[] = {
- { "bq27200", 0 },
+static const struct i2c_device_id bq27x00_id[] = {
+ { "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */
+ { "bq27500", BQ27500 },
{},
};
-static struct i2c_driver bq27200_battery_driver = {
+static struct i2c_driver bq27x00_battery_driver = {
.driver = {
- .name = "bq27200-battery",
+ .name = "bq27x00-battery",
},
- .probe = bq27200_battery_probe,
- .remove = bq27200_battery_remove,
- .id_table = bq27200_id,
+ .probe = bq27x00_battery_probe,
+ .remove = bq27x00_battery_remove,
+ .id_table = bq27x00_id,
};
static int __init bq27x00_battery_init(void)
{
int ret;
- ret = i2c_add_driver(&bq27200_battery_driver);
+ ret = i2c_add_driver(&bq27x00_battery_driver);
if (ret)
- printk(KERN_ERR "Unable to register BQ27200 driver\n");
+ printk(KERN_ERR "Unable to register BQ27x00 driver\n");
return ret;
}
@@ -363,7 +384,7 @@ module_init(bq27x00_battery_init);
static void __exit bq27x00_battery_exit(void)
{
- i2c_del_driver(&bq27200_battery_driver);
+ i2c_del_driver(&bq27x00_battery_driver);
}
module_exit(bq27x00_battery_exit);
generated by cgit (git 2.34.1) at 2025-10-31 12:23:59 +0000