drivers/power/ds2780_battery.c: create central point for calling w1 interface

Simply creates one point to call the w1 interface.

Signed-off-by: Clifton Barnes <cabarnes@indesign-llc.com>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Cc: <stable@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 42 insertions, 35 deletions

diff --git a/drivers/power/ds2780_battery.c b/drivers/power/ds2780_battery.c
index 1fefe82e12e3..2571b4143784 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;