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authorAndreas Dannenberg <dannenberg@ti.com>2015-09-28 17:33:53 -0500
committerSebastian Reichel <sre@kernel.org>2015-09-29 16:49:58 +0200
commitbf02dca9ee9d5f9ea7a0ef2e15a2051b8cca6b09 (patch)
tree7338ff5436e2f16013c83808672cd200cad49f37 /drivers/power
parentfff59df1054a56b7960b3a0aa96d86d955dacf55 (diff)
downloadlinux-bf02dca9ee9d5f9ea7a0ef2e15a2051b8cca6b09.tar.bz2
power: bq24257: Add basic support for bq24250/bq24251
This patch adds basic support for bq24250 and bq24251 which are very similar to the bq24257 the driver was originally written for. Basic support means the ability to select a device through Kconfig, DT and ACPI, an instance variable allowing to check which chip is active, and the reporting back of the selected device through the model_name power supply sysfs property. This patch by itself is not sufficient to actually use those two added devices in a real-world setting due to some feature differences which are addressed by other patches in this series. Signed-off-by: Andreas Dannenberg <dannenberg@ti.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/Kconfig5
-rw-r--r--drivers/power/bq24257_charger.c52
2 files changed, 52 insertions, 5 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index eeb577653c9d..9e68853217ca 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -409,12 +409,13 @@ config CHARGER_BQ24190
Say Y to enable support for the TI BQ24190 battery charger.
config CHARGER_BQ24257
- tristate "TI BQ24257 battery charger driver"
+ tristate "TI BQ24250/24251/24257 battery charger driver"
depends on I2C
depends on GPIOLIB || COMPILE_TEST
depends on REGMAP_I2C
help
- Say Y to enable support for the TI BQ24257 battery charger.
+ Say Y to enable support for the TI BQ24250, BQ24251, and BQ24257 battery
+ chargers.
config CHARGER_BQ24735
tristate "TI BQ24735 battery charger support"
diff --git a/drivers/power/bq24257_charger.c b/drivers/power/bq24257_charger.c
index 060f754b41e5..b0c853320b46 100644
--- a/drivers/power/bq24257_charger.c
+++ b/drivers/power/bq24257_charger.c
@@ -13,6 +13,10 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
+ * Datasheets:
+ * http://www.ti.com/product/bq24250
+ * http://www.ti.com/product/bq24251
+ * http://www.ti.com/product/bq24257
*/
#include <linux/module.h>
@@ -40,6 +44,22 @@
#define BQ24257_ILIM_SET_DELAY 1000 /* msec */
+/*
+ * When adding support for new devices make sure that enum bq2425x_chip and
+ * bq2425x_chip_name[] always stay in sync!
+ */
+enum bq2425x_chip {
+ BQ24250,
+ BQ24251,
+ BQ24257,
+};
+
+static const char *const bq2425x_chip_name[] = {
+ "bq24250",
+ "bq24251",
+ "bq24257",
+};
+
enum bq24257_fields {
F_WD_FAULT, F_WD_EN, F_STAT, F_FAULT, /* REG 1 */
F_RESET, F_IILIMIT, F_EN_STAT, F_EN_TERM, F_CE, F_HZ_MODE, /* REG 2 */
@@ -70,6 +90,8 @@ struct bq24257_device {
struct device *dev;
struct power_supply *charger;
+ enum bq2425x_chip chip;
+
struct regmap *rmap;
struct regmap_field *rmap_fields[F_MAX_FIELDS];
@@ -248,6 +270,10 @@ static int bq24257_power_supply_get_property(struct power_supply *psy,
val->strval = BQ24257_MANUFACTURER;
break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = bq2425x_chip_name[bq->chip];
+ break;
+
case POWER_SUPPLY_PROP_ONLINE:
val->intval = state.power_good;
break;
@@ -561,6 +587,7 @@ static int bq24257_hw_init(struct bq24257_device *bq)
static enum power_supply_property bq24257_power_supply_props[] = {
POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_HEALTH,
@@ -644,6 +671,7 @@ static int bq24257_probe(struct i2c_client *client,
{
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
struct device *dev = &client->dev;
+ const struct acpi_device_id *acpi_id;
struct bq24257_device *bq;
int ret;
int i;
@@ -660,6 +688,18 @@ static int bq24257_probe(struct i2c_client *client,
bq->client = client;
bq->dev = dev;
+ if (ACPI_HANDLE(dev)) {
+ acpi_id = acpi_match_device(dev->driver->acpi_match_table,
+ &client->dev);
+ if (!acpi_id) {
+ dev_err(dev, "Failed to match ACPI device\n");
+ return -ENODEV;
+ }
+ bq->chip = (enum bq2425x_chip)acpi_id->driver_data;
+ } else {
+ bq->chip = (enum bq2425x_chip)id->driver_data;
+ }
+
mutex_init(&bq->lock);
bq->rmap = devm_regmap_init_i2c(client, &bq24257_regmap_config);
@@ -722,7 +762,7 @@ static int bq24257_probe(struct i2c_client *client,
bq24257_irq_handler_thread,
IRQF_TRIGGER_FALLING |
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
- "bq24257", bq);
+ bq2425x_chip_name[bq->chip], bq);
if (ret) {
dev_err(dev, "Failed to request IRQ #%d\n", client->irq);
return ret;
@@ -793,19 +833,25 @@ static const struct dev_pm_ops bq24257_pm = {
};
static const struct i2c_device_id bq24257_i2c_ids[] = {
- { "bq24257", 0 },
+ { "bq24250", BQ24250 },
+ { "bq24251", BQ24251 },
+ { "bq24257", BQ24257 },
{},
};
MODULE_DEVICE_TABLE(i2c, bq24257_i2c_ids);
static const struct of_device_id bq24257_of_match[] = {
+ { .compatible = "ti,bq24250", },
+ { .compatible = "ti,bq24251", },
{ .compatible = "ti,bq24257", },
{ },
};
MODULE_DEVICE_TABLE(of, bq24257_of_match);
static const struct acpi_device_id bq24257_acpi_match[] = {
- {"BQ242570", 0},
+ { "BQ242500", BQ24250 },
+ { "BQ242510", BQ24251 },
+ { "BQ242570", BQ24257 },
{},
};
MODULE_DEVICE_TABLE(acpi, bq24257_acpi_match);