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hwmon: (w83795) Delay reading limit registers

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Wait until we need the limit register values, instead of pre-reading
them. This saves 544 ms on modprobe on my test system. Obviously this
time is added when first running "sensors" or any other monitoring
application, but I think it is better than slowing down the boot.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2010-10-28 20:31:48 +02:00 committed by Jean Delvare
parent 0d7237bfd1
commit 2ae61de905
1 changed files with 6 additions and 1 deletions
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7
drivers/hwmon/w83795.c
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@ -371,6 +371,7 @@ struct w83795_data {
u8 beeps[6]; /* Register value */
char valid;
char valid_limits;
};
/*
@ -498,6 +499,8 @@ static void w83795_update_limits(struct i2c_client *client)
/* Read beep settings */
for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
data->beeps[i] = w83795_read(client, W83795_REG_BEEP(i));
data->valid_limits = 1;
}
static void w83795_update_pwm_config(struct i2c_client *client)
@ -564,6 +567,9 @@ static struct w83795_data *w83795_update_device(struct device *dev)
mutex_lock(&data->update_lock);
if (!data->valid_limits)
w83795_update_limits(client);
if (!(time_after(jiffies, data->last_updated + HZ * 2)
|| !data->valid))
goto END;
@ -2017,7 +2023,6 @@ static int w83795_probe(struct i2c_client *client,
}
data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
w83795_update_limits(client);
/* pwm and smart fan */
if (data->chip_type == w83795g)