Commit 6c82b2f3 authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
Browse files

hwmon: (w83795) Fix LSB reading of fan speeds 



Misplaced parentheses caused the wrong register value to be read,
resulting in random LSB for fan speed values and limits.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 71caf46f

drivers/hwmon/w83795.c

+5 −5
Original line number Diff line number Diff line
@@ -272,7 +272,7 @@ static inline u16 in_to_reg(u8 index, u16 val) 


static inline unsigned long fan_from_reg(u16 val)

{

	if ((val >= 0xff0) || (val == 0))

	if ((val == 0xfff) || (val == 0))

		return 0;

	return 1350000UL / val;

}
@@ -456,7 +456,7 @@ static struct w83795_data *w83795_update_device(struct device *dev) 
			continue;

		data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;

		data->fan[i] |=

		  (w83795_read(client, W83795_REG_VRLSB >> 4)) & 0x0F;

		  (w83795_read(client, W83795_REG_VRLSB) >> 4) & 0x0F;

	}



	/* Update temperature */
@@ -1940,11 +1940,11 @@ static int w83795_probe(struct i2c_client *client, 
		data->fan_min[i] =

			w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;

		data->fan_min[i] |=

		  (w83795_read(client, W83795_REG_FAN_MIN_LSB(i) >>

			W83795_REG_FAN_MIN_LSB_SHIFT(i))) & 0x0F;

		  (w83795_read(client, W83795_REG_FAN_MIN_LSB(i)) >>

			W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;

		data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;

		data->fan[i] |=

		  (w83795_read(client, W83795_REG_VRLSB >> 4)) & 0x0F;

		  (w83795_read(client, W83795_REG_VRLSB) >> 4) & 0x0F;

	}



	/* temperature and limits */