From e647ecf15e365679f0528d7815ab4db0d4802918 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Wed, 27 Jul 2005 21:28:28 +0200 Subject: [PATCH] hwmon: soften lm75 initialization The LM75 initialization is a bit agressive, it arbitrarily reconfigures the chip. Make it only change the bit it needs. This is a port from the 2.4 kernel version of the driver (lm_sensors). Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman --- drivers/hwmon/lm75.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'drivers/hwmon') diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c index 5be164ed278..79d7ebc9b14 100644 --- a/drivers/hwmon/lm75.c +++ b/drivers/hwmon/lm75.c @@ -251,8 +251,12 @@ static int lm75_write_value(struct i2c_client *client, u8 reg, u16 value) static void lm75_init_client(struct i2c_client *client) { - /* Initialize the LM75 chip */ - lm75_write_value(client, LM75_REG_CONF, 0); + int reg; + + /* Enable if in shutdown mode */ + reg = lm75_read_value(client, LM75_REG_CONF); + if (reg >= 0 && (reg & 0x01)) + lm75_write_value(client, LM75_REG_CONF, reg & 0xfe); } static struct lm75_data *lm75_update_device(struct device *dev) -- cgit v1.2.3-70-g09d2