forked from Minki/linux
hwmon: (max6650) Read non-volatile registers only once
Only tachometer and alarm status registers are modified by the chip. All other registers only need to be read only once, and reading them repeatedly does not add any value. Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
parent
e193acb3d6
commit
62dbe50591
@ -162,17 +162,10 @@ static struct max6650_data *max6650_update_device(struct device *dev)
|
||||
mutex_lock(&data->update_lock);
|
||||
|
||||
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
|
||||
data->speed = i2c_smbus_read_byte_data(client,
|
||||
MAX6650_REG_SPEED);
|
||||
data->config = i2c_smbus_read_byte_data(client,
|
||||
MAX6650_REG_CONFIG);
|
||||
for (i = 0; i < data->nr_fans; i++) {
|
||||
data->tach[i] = i2c_smbus_read_byte_data(client,
|
||||
tach_reg[i]);
|
||||
}
|
||||
data->count = i2c_smbus_read_byte_data(client,
|
||||
MAX6650_REG_COUNT);
|
||||
data->dac = i2c_smbus_read_byte_data(client, MAX6650_REG_DAC);
|
||||
|
||||
/*
|
||||
* Alarms are cleared on read in case the condition that
|
||||
@ -421,8 +414,22 @@ static int max6650_init_client(struct max6650_data *data,
|
||||
dev_err(dev, "Config write error, aborting.\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
data->config = reg;
|
||||
|
||||
reg = i2c_smbus_read_byte_data(client, MAX6650_REG_SPEED);
|
||||
if (reg < 0) {
|
||||
dev_err(dev, "Failed to read speed register, aborting.\n");
|
||||
return reg;
|
||||
}
|
||||
data->speed = reg;
|
||||
|
||||
reg = i2c_smbus_read_byte_data(client, MAX6650_REG_DAC);
|
||||
if (reg < 0) {
|
||||
dev_err(dev, "Failed to read DAC register, aborting.\n");
|
||||
return reg;
|
||||
}
|
||||
data->dac = reg;
|
||||
|
||||
reg = i2c_smbus_read_byte_data(client, MAX6650_REG_COUNT);
|
||||
if (reg < 0) {
|
||||
dev_err(dev, "Failed to read count register, aborting.\n");
|
||||
|
Loading…
Reference in New Issue
Block a user