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Add support for bq27521 battery monitor

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This adds basic support for BQ27521 battery monitor, used in Nokia N9
and N950. In particular, battery voltage is important to be able to
tell when the battery is almost empty. Emptying battery on N950 is
pretty painful, as flasher needs to be used to recover phone in such case.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Andrew F. Davis <afd@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
This commit is contained in:
Pavel Machek 2017-11-10 11:39:37 +01:00 committed by Sebastian Reichel
parent d16002755d
commit 70a39e1075
4 changed files with 41 additions and 2 deletions
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1
Documentation/devicetree/bindings/power/supply/bq27xxx.txt
View file

@ -15,6 +15,7 @@ Required properties:
* "ti,bq27520g2" - BQ27520-g2
* "ti,bq27520g3" - BQ27520-g3
* "ti,bq27520g4" - BQ27520-g4
* "ti,bq27521" - BQ27521
* "ti,bq27530" - BQ27530
* "ti,bq27531" - BQ27531
* "ti,bq27541" - BQ27541

39
drivers/power/supply/bq27xxx_battery.c
View file

@ -323,6 +323,30 @@ static u8
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
BQ27XXX_DM_REG_ROWS,
},
bq27521_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x02,
[BQ27XXX_REG_TEMP] = 0x0a,
[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
[BQ27XXX_REG_VOLT] = 0x0c,
[BQ27XXX_REG_AI] = 0x0e,
[BQ27XXX_REG_FLAGS] = 0x08,
[BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
[BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
[BQ27XXX_REG_FCC] = INVALID_REG_ADDR,
[BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
[BQ27XXX_REG_SOC] = INVALID_REG_ADDR,
[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
[BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
[BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
[BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
[BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
[BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
},
bq27530_regs[BQ27XXX_REG_MAX] = {
[BQ27XXX_REG_CTRL] = 0x00,
[BQ27XXX_REG_TEMP] = 0x06,
@ -557,6 +581,15 @@ static enum power_supply_property bq27520g4_props[] = {
POWER_SUPPLY_PROP_MANUFACTURER,
};
static enum power_supply_property bq27521_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TECHNOLOGY,
};
static enum power_supply_property bq27530_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_PRESENT,
@ -671,6 +704,7 @@ static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
#define bq27520g2_dm_regs 0
#define bq27520g3_dm_regs 0
#define bq27520g4_dm_regs 0
#define bq27521_dm_regs 0
#define bq27530_dm_regs 0
#define bq27531_dm_regs 0
#define bq27541_dm_regs 0
@ -717,8 +751,8 @@ static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
#endif
#define BQ27XXX_O_ZERO 0x00000001
#define BQ27XXX_O_OTDC 0x00000002
#define BQ27XXX_O_UTOT 0x00000004
#define BQ27XXX_O_OTDC 0x00000002 /* has OTC/OTD overtemperature flags */
#define BQ27XXX_O_UTOT 0x00000004 /* has OT overtemperature flag */
#define BQ27XXX_O_CFGUP 0x00000008
#define BQ27XXX_O_RAM 0x00000010
@ -751,6 +785,7 @@ static struct {
[BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0 , BQ27XXX_O_OTDC),
[BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0 , BQ27XXX_O_OTDC),
[BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0 , BQ27XXX_O_OTDC),
[BQ27521] = BQ27XXX_DATA(bq27521, 0 , 0),
[BQ27530] = BQ27XXX_DATA(bq27530, 0 , BQ27XXX_O_UTOT),
[BQ27531] = BQ27XXX_DATA(bq27531, 0 , BQ27XXX_O_UTOT),
[BQ27541] = BQ27XXX_DATA(bq27541, 0 , BQ27XXX_O_OTDC),

2
drivers/power/supply/bq27xxx_battery_i2c.c
View file

@ -239,6 +239,7 @@ static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
{ "bq27520g2", BQ27520G2 },
{ "bq27520g3", BQ27520G3 },
{ "bq27520g4", BQ27520G4 },
{ "bq27521", BQ27521 },
{ "bq27530", BQ27530 },
{ "bq27531", BQ27531 },
{ "bq27541", BQ27541 },
@ -269,6 +270,7 @@ static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = {
{ .compatible = "ti,bq27520g2" },
{ .compatible = "ti,bq27520g3" },
{ .compatible = "ti,bq27520g4" },
{ .compatible = "ti,bq27521" },
{ .compatible = "ti,bq27530" },
{ .compatible = "ti,bq27531" },
{ .compatible = "ti,bq27541" },

1
include/linux/power/bq27xxx_battery.h
View file

@ -16,6 +16,7 @@ enum bq27xxx_chip {
BQ27520G2, /* bq27520G2 */
BQ27520G3, /* bq27520G3 */
BQ27520G4, /* bq27520G4 */
BQ27521, /* bq27521 */
BQ27530, /* bq27530, bq27531 */
BQ27531,
BQ27541, /* bq27541, bq27542, bq27546, bq27742 */