[PATCH] power: bq27x00_battery: add bq27510 support

Alexandre Belloni
2015-02-22T14:08:37Z

Add support for bq27510 to the bq27x00 driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/power/bq27x00_battery.c | 50 ++++++++++++++++++++++++++++++++++++-----
1 file changed, 45 insertions(+), 5 deletions(-)

diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index a78ac201828e..1eac363bbc8e 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -24,6 +24,7 @@
* http://focus.ti.com/docs/prod/folders/print/bq27500.html
* http://www.ti.com/product/bq27425-g1
* http://www.ti.com/product/BQ27742-G1
+ * http://www.ti.com/product/BQ27510-G3
*/

#include <linux/device.h>
@@ -74,6 +75,10 @@

#define BQ27742_POWER_AVG 0x76

+#define BQ27510_REG_SOC 0x20
+#define BQ27510_REG_DCAP 0x2E /* Design capacity */
+#define BQ27510_REG_CYCT 0x1E /* Cycle count total */
+
/* bq27425 register addresses are same as bq27x00 addresses minus 4 */
#define BQ27425_REG_OFFSET 0x04
#define BQ27425_REG_SOC 0x18 /* Register address plus offset */
@@ -86,7 +91,7 @@ struct bq27x00_access_methods {
int (*read)(struct bq27x00_device_info *di, u8 reg, bool single);
};

-enum bq27x00_chip { BQ27000, BQ27500, BQ27425, BQ27742};
+enum bq27x00_chip { BQ27000, BQ27500, BQ27425, BQ27742, BQ27510};

struct bq27x00_reg_cache {
int temperature;
@@ -173,6 +178,24 @@ static enum power_supply_property bq27742_battery_props[] = {
POWER_SUPPLY_PROP_HEALTH,
};

+static enum power_supply_property bq27510_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 - " \
@@ -197,7 +220,8 @@ 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 || di->chip == BQ27742)
+ if (di->chip == BQ27425 || di->chip == BQ27500 || di->chip == BQ27742
+ || di->chip == BQ27510)
return true;
return false;
}
@@ -212,6 +236,8 @@ static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di)

if (di->chip == BQ27500 || di->chip == BQ27742)
rsoc = bq27x00_read(di, BQ27500_REG_SOC, false);
+ else if (di->chip == BQ27510)
+ rsoc = bq27x00_read(di, BQ27510_REG_SOC, false);
else if (di->chip == BQ27425)
rsoc = bq27x00_read(di, BQ27425_REG_SOC, false);
else
@@ -282,7 +308,9 @@ static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di)
{
int ilmd;

- if (bq27xxx_is_chip_version_higher(di))
+ if (di->chip == BQ27510)
+ ilmd = bq27x00_read(di, BQ27510_REG_DCAP, false);
+ else if (bq27xxx_is_chip_version_higher(di))
ilmd = bq27x00_read(di, BQ27500_REG_DCAP, false);
else
ilmd = bq27x00_read(di, BQ27000_REG_ILMD, true);
@@ -350,6 +378,9 @@ static int bq27x00_battery_read_cyct(struct bq27x00_device_info *di)
{
int cyct;

+
+ if (di->chip == BQ27510)
+ cyct = bq27x00_read(di, BQ27510_REG_CYCT, false);
cyct = bq27x00_read(di, BQ27x00_REG_CYCT, false);
if (cyct < 0)
dev_err(di->dev, "error reading cycle count total\n");
@@ -421,6 +452,10 @@ static int bq27x00_battery_read_health(struct bq27x00_device_info *di)
else
tval = POWER_SUPPLY_HEALTH_GOOD;
return tval;
+ } else if (di->chip == BQ27510) {
+ if (tval & BQ27500_FLAG_OTC)
+ return POWER_SUPPLY_HEALTH_OVERHEAT;
+ return POWER_SUPPLY_HEALTH_GOOD;
} else {
if (tval & BQ27000_FLAG_EDV1)
tval = POWER_SUPPLY_HEALTH_DEAD;
@@ -436,6 +471,7 @@ static void bq27x00_update(struct bq27x00_device_info *di)
{
struct bq27x00_reg_cache cache = {0, };
bool is_bq27500 = di->chip == BQ27500;
+ bool is_bq27510 = di->chip == BQ27510;
bool is_bq27425 = di->chip == BQ27425;
bool is_bq27742 = di->chip == BQ27742;
bool flags_1b = !(is_bq27500 || is_bq27742);
@@ -445,7 +481,7 @@ static void bq27x00_update(struct bq27x00_device_info *di)
/* read error */
cache.flags = -1;
if (cache.flags >= 0) {
- if (!is_bq27500 && !is_bq27425 && !is_bq27742
+ if (!is_bq27500 && !is_bq27425 && !is_bq27742 && !is_bq27510
&& (cache.flags & BQ27000_FLAG_CI)) {
dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n");
cache.capacity = -ENODATA;
@@ -457,7 +493,7 @@ static void bq27x00_update(struct bq27x00_device_info *di)
cache.health = -ENODATA;
} else {
cache.capacity = bq27x00_battery_read_rsoc(di);
- if (is_bq27742)
+ if (is_bq27742 || is_bq27510)
cache.time_to_empty =
bq27x00_battery_read_time(di,
BQ27x00_REG_TTE);
@@ -740,6 +776,9 @@ static int bq27x00_powersupply_init(struct bq27x00_device_info *di)
} else if (di->chip == BQ27742) {
di->bat.properties = bq27742_battery_props;
di->bat.num_properties = ARRAY_SIZE(bq27742_battery_props);
+ } else if (di->chip == BQ27510) {
+ di->bat.properties = bq27510_battery_props;
+ di->bat.num_properties = ARRAY_SIZE(bq27510_battery_props);
} else {
di->bat.properties = bq27x00_battery_props;
di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props);
@@ -897,6 +936,7 @@ static const struct i2c_device_id bq27x00_id[] = {
{ "bq27500", BQ27500 },
{ "bq27425", BQ27425 },
{ "bq27742", BQ27742 },
+ { "bq27510", BQ27510 },
{},
};
MODULE_DEVICE_TABLE(i2c, bq27x00_id);
--
2.1.0