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path: root/drivers/power/ds2780_battery.c
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Diffstat (limited to 'drivers/power/ds2780_battery.c')
-rw-r--r--drivers/power/ds2780_battery.c104
1 files changed, 48 insertions, 56 deletions
diff --git a/drivers/power/ds2780_battery.c b/drivers/power/ds2780_battery.c
index 1fefe82e12e..9f418fa879e 100644
--- a/drivers/power/ds2780_battery.c
+++ b/drivers/power/ds2780_battery.c
@@ -49,8 +49,8 @@ enum current_types {
static const char model[] = "DS2780";
static const char manufacturer[] = "Maxim/Dallas";
-static inline struct ds2780_device_info *to_ds2780_device_info(
- struct power_supply *psy)
+static inline struct ds2780_device_info *
+to_ds2780_device_info(struct power_supply *psy)
{
return container_of(psy, struct ds2780_device_info, bat);
}
@@ -60,17 +60,25 @@ static inline struct power_supply *to_power_supply(struct device *dev)
return dev_get_drvdata(dev);
}
-static inline int ds2780_read8(struct device *dev, u8 *val, int addr)
+static inline int ds2780_battery_io(struct ds2780_device_info *dev_info,
+ char *buf, int addr, size_t count, int io)
{
- return w1_ds2780_io(dev, val, addr, sizeof(u8), 0);
+ return w1_ds2780_io(dev_info->w1_dev, buf, addr, count, io);
}
-static int ds2780_read16(struct device *dev, s16 *val, int addr)
+static inline int ds2780_read8(struct ds2780_device_info *dev_info, u8 *val,
+ int addr)
+{
+ return ds2780_battery_io(dev_info, val, addr, sizeof(u8), 0);
+}
+
+static int ds2780_read16(struct ds2780_device_info *dev_info, s16 *val,
+ int addr)
{
int ret;
u8 raw[2];
- ret = w1_ds2780_io(dev, raw, addr, sizeof(u8) * 2, 0);
+ ret = ds2780_battery_io(dev_info, raw, addr, sizeof(raw), 0);
if (ret < 0)
return ret;
@@ -79,16 +87,16 @@ static int ds2780_read16(struct device *dev, s16 *val, int addr)
return 0;
}
-static inline int ds2780_read_block(struct device *dev, u8 *val, int addr,
- size_t count)
+static inline int ds2780_read_block(struct ds2780_device_info *dev_info,
+ u8 *val, int addr, size_t count)
{
- return w1_ds2780_io(dev, val, addr, count, 0);
+ return ds2780_battery_io(dev_info, val, addr, count, 0);
}
-static inline int ds2780_write(struct device *dev, u8 *val, int addr,
- size_t count)
+static inline int ds2780_write(struct ds2780_device_info *dev_info, u8 *val,
+ int addr, size_t count)
{
- return w1_ds2780_io(dev, val, addr, count, 1);
+ return ds2780_battery_io(dev_info, val, addr, count, 1);
}
static inline int ds2780_store_eeprom(struct device *dev, int addr)
@@ -122,7 +130,7 @@ static int ds2780_set_sense_register(struct ds2780_device_info *dev_info,
{
int ret;
- ret = ds2780_write(dev_info->w1_dev, &conductance,
+ ret = ds2780_write(dev_info, &conductance,
DS2780_RSNSP_REG, sizeof(u8));
if (ret < 0)
return ret;
@@ -134,7 +142,7 @@ static int ds2780_set_sense_register(struct ds2780_device_info *dev_info,
static int ds2780_get_rsgain_register(struct ds2780_device_info *dev_info,
u16 *rsgain)
{
- return ds2780_read16(dev_info->w1_dev, rsgain, DS2780_RSGAIN_MSB_REG);
+ return ds2780_read16(dev_info, rsgain, DS2780_RSGAIN_MSB_REG);
}
/* Set RSGAIN value from 0 to 1.999 in steps of 0.001 */
@@ -144,8 +152,8 @@ static int ds2780_set_rsgain_register(struct ds2780_device_info *dev_info,
int ret;
u8 raw[] = {rsgain >> 8, rsgain & 0xFF};
- ret = ds2780_write(dev_info->w1_dev, raw,
- DS2780_RSGAIN_MSB_REG, sizeof(u8) * 2);
+ ret = ds2780_write(dev_info, raw,
+ DS2780_RSGAIN_MSB_REG, sizeof(raw));
if (ret < 0)
return ret;
@@ -167,7 +175,7 @@ static int ds2780_get_voltage(struct ds2780_device_info *dev_info,
* Bits 2 - 0 of the voltage value are in bits 7 - 5 of the
* voltage LSB register
*/
- ret = ds2780_read16(dev_info->w1_dev, &voltage_raw,
+ ret = ds2780_read16(dev_info, &voltage_raw,
DS2780_VOLT_MSB_REG);
if (ret < 0)
return ret;
@@ -196,7 +204,7 @@ static int ds2780_get_temperature(struct ds2780_device_info *dev_info,
* Bits 2 - 0 of the temperature value are in bits 7 - 5 of the
* temperature LSB register
*/
- ret = ds2780_read16(dev_info->w1_dev, &temperature_raw,
+ ret = ds2780_read16(dev_info, &temperature_raw,
DS2780_TEMP_MSB_REG);
if (ret < 0)
return ret;
@@ -222,13 +230,13 @@ static int ds2780_get_current(struct ds2780_device_info *dev_info,
* The units of measurement for current are dependent on the value of
* the sense resistor.
*/
- ret = ds2780_read8(dev_info->w1_dev, &sense_res_raw, DS2780_RSNSP_REG);
+ ret = ds2780_read8(dev_info, &sense_res_raw, DS2780_RSNSP_REG);
if (ret < 0)
return ret;
if (sense_res_raw == 0) {
dev_err(dev_info->dev, "sense resistor value is 0\n");
- return -ENXIO;
+ return -EINVAL;
}
sense_res = 1000 / sense_res_raw;
@@ -248,7 +256,7 @@ static int ds2780_get_current(struct ds2780_device_info *dev_info,
* Bits 7 - 0 of the current value are in bits 7 - 0 of the current
* LSB register
*/
- ret = ds2780_read16(dev_info->w1_dev, &current_raw, reg_msb);
+ ret = ds2780_read16(dev_info, &current_raw, reg_msb);
if (ret < 0)
return ret;
@@ -267,7 +275,7 @@ static int ds2780_get_accumulated_current(struct ds2780_device_info *dev_info,
* The units of measurement for accumulated current are dependent on
* the value of the sense resistor.
*/
- ret = ds2780_read8(dev_info->w1_dev, &sense_res_raw, DS2780_RSNSP_REG);
+ ret = ds2780_read8(dev_info, &sense_res_raw, DS2780_RSNSP_REG);
if (ret < 0)
return ret;
@@ -285,7 +293,7 @@ static int ds2780_get_accumulated_current(struct ds2780_device_info *dev_info,
* Bits 7 - 0 of the ACR value are in bits 7 - 0 of the ACR
* LSB register
*/
- ret = ds2780_read16(dev_info->w1_dev, &current_raw, DS2780_ACR_MSB_REG);
+ ret = ds2780_read16(dev_info, &current_raw, DS2780_ACR_MSB_REG);
if (ret < 0)
return ret;
@@ -299,7 +307,7 @@ static int ds2780_get_capacity(struct ds2780_device_info *dev_info,
int ret;
u8 raw;
- ret = ds2780_read8(dev_info->w1_dev, &raw, DS2780_RARC_REG);
+ ret = ds2780_read8(dev_info, &raw, DS2780_RARC_REG);
if (ret < 0)
return ret;
@@ -345,7 +353,7 @@ static int ds2780_get_charge_now(struct ds2780_device_info *dev_info,
* Bits 7 - 0 of the RAAC value are in bits 7 - 0 of the RAAC
* LSB register
*/
- ret = ds2780_read16(dev_info->w1_dev, &charge_raw, DS2780_RAAC_MSB_REG);
+ ret = ds2780_read16(dev_info, &charge_raw, DS2780_RAAC_MSB_REG);
if (ret < 0)
return ret;
@@ -356,7 +364,7 @@ static int ds2780_get_charge_now(struct ds2780_device_info *dev_info,
static int ds2780_get_control_register(struct ds2780_device_info *dev_info,
u8 *control_reg)
{
- return ds2780_read8(dev_info->w1_dev, control_reg, DS2780_CONTROL_REG);
+ return ds2780_read8(dev_info, control_reg, DS2780_CONTROL_REG);
}
static int ds2780_set_control_register(struct ds2780_device_info *dev_info,
@@ -364,7 +372,7 @@ static int ds2780_set_control_register(struct ds2780_device_info *dev_info,
{
int ret;
- ret = ds2780_write(dev_info->w1_dev, &control_reg,
+ ret = ds2780_write(dev_info, &control_reg,
DS2780_CONTROL_REG, sizeof(u8));
if (ret < 0)
return ret;
@@ -503,7 +511,7 @@ static ssize_t ds2780_get_sense_resistor_value(struct device *dev,
struct power_supply *psy = to_power_supply(dev);
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
- ret = ds2780_read8(dev_info->w1_dev, &sense_resistor, DS2780_RSNSP_REG);
+ ret = ds2780_read8(dev_info, &sense_resistor, DS2780_RSNSP_REG);
if (ret < 0)
return ret;
@@ -584,7 +592,7 @@ static ssize_t ds2780_get_pio_pin(struct device *dev,
struct power_supply *psy = to_power_supply(dev);
struct ds2780_device_info *dev_info = to_ds2780_device_info(psy);
- ret = ds2780_read8(dev_info->w1_dev, &sfr, DS2780_SFR_REG);
+ ret = ds2780_read8(dev_info, &sfr, DS2780_SFR_REG);
if (ret < 0)
return ret;
@@ -611,7 +619,7 @@ static ssize_t ds2780_set_pio_pin(struct device *dev,
return -EINVAL;
}
- ret = ds2780_write(dev_info->w1_dev, &new_setting,
+ ret = ds2780_write(dev_info, &new_setting,
DS2780_SFR_REG, sizeof(u8));
if (ret < 0)
return ret;
@@ -632,7 +640,7 @@ static ssize_t ds2780_read_param_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK1_END -
DS2780_EEPROM_BLOCK1_START + 1 - off);
- return ds2780_read_block(dev_info->w1_dev, buf,
+ return ds2780_read_block(dev_info, buf,
DS2780_EEPROM_BLOCK1_START + off, count);
}
@@ -650,7 +658,7 @@ static ssize_t ds2780_write_param_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK1_END -
DS2780_EEPROM_BLOCK1_START + 1 - off);
- ret = ds2780_write(dev_info->w1_dev, buf,
+ ret = ds2780_write(dev_info, buf,
DS2780_EEPROM_BLOCK1_START + off, count);
if (ret < 0)
return ret;
@@ -685,9 +693,8 @@ static ssize_t ds2780_read_user_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK0_END -
DS2780_EEPROM_BLOCK0_START + 1 - off);
- return ds2780_read_block(dev_info->w1_dev, buf,
+ return ds2780_read_block(dev_info, buf,
DS2780_EEPROM_BLOCK0_START + off, count);
-
}
static ssize_t ds2780_write_user_eeprom_bin(struct file *filp,
@@ -704,7 +711,7 @@ static ssize_t ds2780_write_user_eeprom_bin(struct file *filp,
DS2780_EEPROM_BLOCK0_END -
DS2780_EEPROM_BLOCK0_START + 1 - off);
- ret = ds2780_write(dev_info->w1_dev, buf,
+ ret = ds2780_write(dev_info, buf,
DS2780_EEPROM_BLOCK0_START + off, count);
if (ret < 0)
return ret;
@@ -748,12 +755,12 @@ static const struct attribute_group ds2780_attr_group = {
.attrs = ds2780_attributes,
};
-static int __devinit ds2780_battery_probe(struct platform_device *pdev)
+static int ds2780_battery_probe(struct platform_device *pdev)
{
int ret = 0;
struct ds2780_device_info *dev_info;
- dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
+ dev_info = devm_kzalloc(&pdev->dev, sizeof(*dev_info), GFP_KERNEL);
if (!dev_info) {
ret = -ENOMEM;
goto fail;
@@ -772,7 +779,7 @@ static int __devinit ds2780_battery_probe(struct platform_device *pdev)
ret = power_supply_register(&pdev->dev, &dev_info->bat);
if (ret) {
dev_err(dev_info->dev, "failed to register battery\n");
- goto fail_free_info;
+ goto fail;
}
ret = sysfs_create_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);
@@ -806,13 +813,11 @@ fail_remove_group:
sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);
fail_unregister:
power_supply_unregister(&dev_info->bat);
-fail_free_info:
- kfree(dev_info);
fail:
return ret;
}
-static int __devexit ds2780_battery_remove(struct platform_device *pdev)
+static int ds2780_battery_remove(struct platform_device *pdev)
{
struct ds2780_device_info *dev_info = platform_get_drvdata(pdev);
@@ -821,12 +826,9 @@ static int __devexit ds2780_battery_remove(struct platform_device *pdev)
power_supply_unregister(&dev_info->bat);
- kfree(dev_info);
return 0;
}
-MODULE_ALIAS("platform:ds2780-battery");
-
static struct platform_driver ds2780_battery_driver = {
.driver = {
.name = "ds2780-battery",
@@ -835,19 +837,9 @@ static struct platform_driver ds2780_battery_driver = {
.remove = ds2780_battery_remove,
};
-static int __init ds2780_battery_init(void)
-{
- return platform_driver_register(&ds2780_battery_driver);
-}
-
-static void __exit ds2780_battery_exit(void)
-{
- platform_driver_unregister(&ds2780_battery_driver);
-}
-
-module_init(ds2780_battery_init);
-module_exit(ds2780_battery_exit);
+module_platform_driver(ds2780_battery_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Clifton Barnes <cabarnes@indesign-llc.com>");
MODULE_DESCRIPTION("Maxim/Dallas DS2780 Stand-Alone Fuel Gauage IC driver");
+MODULE_ALIAS("platform:ds2780-battery");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-12 07:24:32 +0000