diff options
| author | Jean Delvare <khali@linux-fr.org> | 2012-07-26 22:13:47 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2012-07-27 13:59:22 -0700 |
| commit | 2ccc8731e5054058d5fb990744b4f72a79018d34 (patch) | |
| tree | 10f493b1ba750d43f61657232cc217721a94fb79 /drivers/hwmon/jc42.c | |
| parent | 9baeb8fdd7e1e78973ad19a6d7e2bcf7dfeb2498 (diff) | |
| download | lwn-2ccc8731e5054058d5fb990744b4f72a79018d34.tar.gz lwn-2ccc8731e5054058d5fb990744b4f72a79018d34.zip | |
hwmon: (jc42) Simplify hysteresis mask
Define JC42_CFG_HYST_MASK as the mask _before_ shifting instead of
after shifting. This simplifies the current code slightly, and will
simplify the code to come even more.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/jc42.c')
| -rw-r--r-- | drivers/hwmon/jc42.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/hwmon/jc42.c b/drivers/hwmon/jc42.c index e72ba5d2a824..44f189ed414a 100644 --- a/drivers/hwmon/jc42.c +++ b/drivers/hwmon/jc42.c @@ -57,7 +57,7 @@ static const unsigned short normal_i2c[] = { #define JC42_CFG_EVENT_LOCK (1 << 7) #define JC42_CFG_SHUTDOWN (1 << 8) #define JC42_CFG_HYST_SHIFT 9 -#define JC42_CFG_HYST_MASK 0x03 +#define JC42_CFG_HYST_MASK (0x03 << 9) /* Capabilities */ #define JC42_CAP_RANGE (1 << 2) @@ -287,8 +287,8 @@ static ssize_t show_temp_crit_hyst(struct device *dev, return PTR_ERR(data); temp = jc42_temp_from_reg(data->temp_crit); - hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT) - & JC42_CFG_HYST_MASK]; + hyst = jc42_hysteresis[(data->config & JC42_CFG_HYST_MASK) + >> JC42_CFG_HYST_SHIFT]; return sprintf(buf, "%d\n", temp - hyst); } @@ -302,8 +302,8 @@ static ssize_t show_temp_max_hyst(struct device *dev, return PTR_ERR(data); temp = jc42_temp_from_reg(data->temp_max); - hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT) - & JC42_CFG_HYST_MASK]; + hyst = jc42_hysteresis[(data->config & JC42_CFG_HYST_MASK) + >> JC42_CFG_HYST_SHIFT]; return sprintf(buf, "%d\n", temp - hyst); } @@ -362,8 +362,7 @@ static ssize_t set_temp_crit_hyst(struct device *dev, } mutex_lock(&data->update_lock); - data->config = (data->config - & ~(JC42_CFG_HYST_MASK << JC42_CFG_HYST_SHIFT)) + data->config = (data->config & ~JC42_CFG_HYST_MASK) | (hyst << JC42_CFG_HYST_SHIFT); err = i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config); |