[PATCH] bq27x00_battery: Add support to bq27742
From: Puthikorn Voravootivat
Date: Tue Sep 09 2014 - 15:21:44 EST
Add support to bq27742 in bq27x00 driver. bq27742 register
addresses are mostly mostly the same as bq27500 addresses
with minor differences.
Signed-off-by: Puthikorn Voravootivat <puthik@xxxxxxxxxxxx>
Reviewed-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>
Reviewed-by: Rhyland Klein <rklein@xxxxxxxxxx>
---
Note: currently supported attributes below.
localhost ~ # cat /sys/class/power_supply/bq27742-0/uevent
POWER_SUPPLY_NAME=bq27742-0
POWER_SUPPLY_STATUS=Charging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_VOLTAGE_NOW=3976000
POWER_SUPPLY_CURRENT_NOW=2953000
POWER_SUPPLY_CAPACITY=58
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_TEMP=258
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CHARGE_FULL=0
POWER_SUPPLY_CHARGE_NOW=6393000
POWER_SUPPLY_CHARGE_FULL_DESIGN=10775000
POWER_SUPPLY_CYCLE_COUNT=2
POWER_SUPPLY_POWER_AVG=21677
POWER_SUPPLY_HEALTH=Good
drivers/power/bq27x00_battery.c | 52 +++++++++++++++++++++++++++++++++++------
1 file changed, 45 insertions(+), 7 deletions(-)
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index e10763e..5b9f0ea 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -23,6 +23,7 @@
* http://focus.ti.com/docs/prod/folders/print/bq27000.html
* http://focus.ti.com/docs/prod/folders/print/bq27500.html
* http://www.ti.com/product/bq27425-g1
+ * http://www.ti.com/product/BQ27742-G1
*/
#include <linux/device.h>
@@ -71,6 +72,8 @@
#define BQ27500_FLAG_FC BIT(9)
#define BQ27500_FLAG_OTC BIT(15)
+#define BQ27742_POWER_AVG 0x76
+
/* bq27425 register addresses are same as bq27x00 addresses minus 4 */
#define BQ27425_REG_OFFSET 0x04
#define BQ27425_REG_SOC 0x18 /* Register address plus offset */
@@ -83,7 +86,7 @@ struct bq27x00_access_methods {
int (*read)(struct bq27x00_device_info *di, u8 reg, bool single);
};
-enum bq27x00_chip { BQ27000, BQ27500, BQ27425};
+enum bq27x00_chip { BQ27000, BQ27500, BQ27425, BQ27742};
struct bq27x00_reg_cache {
int temperature;
@@ -152,6 +155,24 @@ static enum power_supply_property bq27425_battery_props[] = {
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
};
+static enum power_supply_property bq27742_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_CHARGE_FULL,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CYCLE_COUNT,
+ POWER_SUPPLY_PROP_POWER_AVG,
+ POWER_SUPPLY_PROP_HEALTH,
+};
+
static unsigned int poll_interval = 360;
module_param(poll_interval, uint, 0644);
MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - " \
@@ -176,7 +197,7 @@ static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg,
*/
static bool bq27xxx_is_chip_version_higher(struct bq27x00_device_info *di)
{
- if (di->chip == BQ27425 || di->chip == BQ27500)
+ if (di->chip == BQ27425 || di->chip == BQ27500 || di->chip == BQ27742)
return true;
return false;
}
@@ -189,7 +210,7 @@ static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di)
{
int rsoc;
- if (di->chip == BQ27500)
+ if (di->chip == BQ27500 || di->chip == BQ27742)
rsoc = bq27x00_read(di, BQ27500_REG_SOC, false);
else if (di->chip == BQ27425)
rsoc = bq27x00_read(di, BQ27425_REG_SOC, false);
@@ -414,6 +435,7 @@ static void bq27x00_update(struct bq27x00_device_info *di)
struct bq27x00_reg_cache cache = {0, };
bool is_bq27500 = di->chip == BQ27500;
bool is_bq27425 = di->chip == BQ27425;
+ bool is_bq27742 = di->chip == BQ27742;
cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500);
if ((cache.flags & 0xff) == 0xff)
@@ -432,7 +454,11 @@ static void bq27x00_update(struct bq27x00_device_info *di)
cache.health = -ENODATA;
} else {
cache.capacity = bq27x00_battery_read_rsoc(di);
- if (!is_bq27425) {
+ if (is_bq27742)
+ cache.time_to_empty =
+ bq27x00_battery_read_time(di,
+ BQ27x00_REG_TTE);
+ else if (!is_bq27425) {
cache.energy = bq27x00_battery_read_energy(di);
cache.time_to_empty =
bq27x00_battery_read_time(di,
@@ -444,14 +470,22 @@ static void bq27x00_update(struct bq27x00_device_info *di)
bq27x00_battery_read_time(di,
BQ27x00_REG_TTF);
}
- cache.charge_full = bq27x00_battery_read_lmd(di);
+ if (!is_bq27742)
+ cache.charge_full =
+ bq27x00_battery_read_lmd(di);
cache.health = bq27x00_battery_read_health(di);
}
cache.temperature = bq27x00_battery_read_temperature(di);
if (!is_bq27425)
cache.cycle_count = bq27x00_battery_read_cyct(di);
- cache.power_avg =
- bq27x00_battery_read_pwr_avg(di, BQ27x00_POWER_AVG);
+ if (is_bq27742)
+ cache.power_avg =
+ bq27x00_battery_read_pwr_avg(di,
+ BQ27742_POWER_AVG);
+ else
+ cache.power_avg =
+ bq27x00_battery_read_pwr_avg(di,
+ BQ27x00_POWER_AVG);
/* We only have to read charge design full once */
if (di->charge_design_full <= 0)
@@ -702,6 +736,9 @@ static int bq27x00_powersupply_init(struct bq27x00_device_info *di)
if (di->chip == BQ27425) {
di->bat.properties = bq27425_battery_props;
di->bat.num_properties = ARRAY_SIZE(bq27425_battery_props);
+ } else if (di->chip == BQ27742) {
+ di->bat.properties = bq27742_battery_props;
+ di->bat.num_properties = ARRAY_SIZE(bq27742_battery_props);
} else {
di->bat.properties = bq27x00_battery_props;
di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props);
@@ -858,6 +895,7 @@ static const struct i2c_device_id bq27x00_id[] = {
{ "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */
{ "bq27500", BQ27500 },
{ "bq27425", BQ27425 },
+ { "bq27742", BQ27742 },
{},
};
MODULE_DEVICE_TABLE(i2c, bq27x00_id);
--
2.1.0.rc2.206.gedb03e5
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