Commit 33725ad3 authored by Jean Delvare's avatar Jean Delvare Committed by Linus Torvalds
Browse files

hwmon/w83627ehf: Fix the fan5 clock divider write

Users have been complaining about the w83627ehf driver flooding their logs
with debug messages like:

w83627ehf 9191-0a10: Increasing fan 4 clock divider from 64 to 128


w83627ehf 9191-0290: Increasing fan 4 clock divider from 4 to 8

The reason is that we failed to actually write the LSB of the encoded clock
divider value for that fan, causing the next read to report the same old value
again and again.

Additionally, the fan number was improperly reported, making the bug harder to
Signed-off-by: default avatarJean Delvare <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 93da2879
......@@ -407,7 +407,7 @@ static void w83627ehf_write_fan_div(struct i2c_client *client, int nr)
case 4:
reg = (w83627ehf_read_value(client, W83627EHF_REG_DIODE) & 0x73)
| ((data->fan_div[4] & 0x03) << 3)
| ((data->fan_div[4] & 0x03) << 2)
| ((data->fan_div[4] & 0x04) << 5);
w83627ehf_write_value(client, W83627EHF_REG_DIODE, reg);
......@@ -471,9 +471,9 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
time */
if (data->fan[i] == 0xff
&& data->fan_div[i] < 0x07) {
dev_dbg(&client->dev, "Increasing fan %d "
dev_dbg(&client->dev, "Increasing fan%d "
"clock divider from %u to %u\n",
i, div_from_reg(data->fan_div[i]),
i + 1, div_from_reg(data->fan_div[i]),
div_from_reg(data->fan_div[i] + 1));
w83627ehf_write_fan_div(client, i);
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