From khali@linux-fr.org Wed Jul 27 12:28:53 2005
Date: Wed, 27 Jul 2005 21:28:28 +0200
From: Jean Delvare <khali@linux-fr.org>
To: Greg KH <greg@kroah.com>
Subject: hwmon: soften lm75 initialization
Message-Id: <20050727212828.0df56e31.khali@linux-fr.org>
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 <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/hwmon/lm75.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
--- gregkh-2.6.orig/drivers/hwmon/lm75.c 2005-07-27 23:26:34.000000000 -0700
+++ gregkh-2.6/drivers/hwmon/lm75.c 2005-07-27 23:30:30.000000000 -0700
@@ -251,8 +251,12 @@
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)