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Subject[154/262] drivers/power/ds2780_battery.c: create central point for calling w1 interface
3.0-stable review patch.  If anyone has any objections, please let me know.

------------------
From: Clifton Barnes <cabarnes@indesign-llc.com>

commit 853eee72f74f449797f0500ea19fc1bf497428d8 upstream.

Simply creates one point to call the w1 interface.

Signed-off-by: Clifton Barnes <cabarnes@indesign-llc.com>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/power/ds2780_battery.c | 77 ++++++++++++++++++++++-------------------
1 file changed, 42 insertions(+), 35 deletions(-)
--- 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_po
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 *
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(str
{
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(str
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(st
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 ds2
* 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
* 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 ds2
* 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 ds2
* 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_curren
* 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_curren
* 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 ds
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
* 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
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(s
{
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
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
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
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_
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
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_b
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_
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;



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