[PATCH v3 2/4] hwmon: (lm75) Drop lm75_read_value and lm75_write_value

From: Guenter Roeck
Date: Thu Jun 30 2016 - 02:48:35 EST


lm75_read_value and lm75_write_value don't really add any value.
Replace with direct smbus access functions.

Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
v2, v3: No change

drivers/hwmon/lm75.c | 42 +++++++++---------------------------------
1 file changed, 9 insertions(+), 33 deletions(-)

diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 0df745501a1f..7b18cbd4a5ec 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -89,8 +89,6 @@ struct lm75_data {
2 = hyst */
};

-static int lm75_read_value(struct i2c_client *client, u8 reg);
-static int lm75_write_value(struct i2c_client *client, u8 reg, u16 value);
static struct lm75_data *lm75_update_device(struct device *dev);


@@ -156,7 +154,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da,
temp = clamp_val(temp, LM75_TEMP_MIN, LM75_TEMP_MAX);
data->temp[nr] = DIV_ROUND_CLOSEST(temp << (resolution - 8),
1000) << (16 - resolution);
- lm75_write_value(client, LM75_REG_TEMP[nr], data->temp[nr]);
+ i2c_smbus_write_word_swapped(client, LM75_REG_TEMP[nr], data->temp[nr]);
mutex_unlock(&data->update_lock);
return count;
}
@@ -296,7 +294,7 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
}

/* configure as specified */
- status = lm75_read_value(client, LM75_REG_CONF);
+ status = i2c_smbus_read_byte_data(client, LM75_REG_CONF);
if (status < 0) {
dev_dbg(dev, "Can't read config? %d\n", status);
return status;
@@ -305,7 +303,7 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
new = status & ~clr_mask;
new |= set_mask;
if (status != new)
- lm75_write_value(client, LM75_REG_CONF, new);
+ i2c_smbus_write_byte_data(client, LM75_REG_CONF, new);

devm_add_action(dev, lm75_remove, data);

@@ -450,13 +448,13 @@ static int lm75_suspend(struct device *dev)
{
int status;
struct i2c_client *client = to_i2c_client(dev);
- status = lm75_read_value(client, LM75_REG_CONF);
+ status = i2c_smbus_read_byte_data(client, LM75_REG_CONF);
if (status < 0) {
dev_dbg(&client->dev, "Can't read config? %d\n", status);
return status;
}
status = status | LM75_SHUTDOWN;
- lm75_write_value(client, LM75_REG_CONF, status);
+ i2c_smbus_write_byte_data(client, LM75_REG_CONF, status);
return 0;
}

@@ -464,13 +462,13 @@ static int lm75_resume(struct device *dev)
{
int status;
struct i2c_client *client = to_i2c_client(dev);
- status = lm75_read_value(client, LM75_REG_CONF);
+ status = i2c_smbus_read_byte_data(client, LM75_REG_CONF);
if (status < 0) {
dev_dbg(&client->dev, "Can't read config? %d\n", status);
return status;
}
status = status & ~LM75_SHUTDOWN;
- lm75_write_value(client, LM75_REG_CONF, status);
+ i2c_smbus_write_byte_data(client, LM75_REG_CONF, status);
return 0;
}

@@ -497,29 +495,6 @@ static struct i2c_driver lm75_driver = {

/*-----------------------------------------------------------------------*/

-/* register access */
-
-/*
- * All registers are word-sized, except for the configuration register.
- * LM75 uses a high-byte first convention, which is exactly opposite to
- * the SMBus standard.
- */
-static int lm75_read_value(struct i2c_client *client, u8 reg)
-{
- if (reg == LM75_REG_CONF)
- return i2c_smbus_read_byte_data(client, reg);
- else
- return i2c_smbus_read_word_swapped(client, reg);
-}
-
-static int lm75_write_value(struct i2c_client *client, u8 reg, u16 value)
-{
- if (reg == LM75_REG_CONF)
- return i2c_smbus_write_byte_data(client, reg, value);
- else
- return i2c_smbus_write_word_swapped(client, reg, value);
-}
-
static struct lm75_data *lm75_update_device(struct device *dev)
{
struct lm75_data *data = dev_get_drvdata(dev);
@@ -536,7 +511,8 @@ static struct lm75_data *lm75_update_device(struct device *dev)
for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
int status;

- status = lm75_read_value(client, LM75_REG_TEMP[i]);
+ status = i2c_smbus_read_word_swapped(client,
+ LM75_REG_TEMP[i]);
if (unlikely(status < 0)) {
dev_dbg(dev,
"LM75: Failed to read value: reg %d, error %d\n",
--
2.5.0