Commit d2cac802 authored by Ben Hutchings's avatar Ben Hutchings Committed by Jean Delvare
Browse files

hwmon: (lm87) Restore original configuration register on removal 



This means that if we have to start the monitor when probed, we also
stop it on removal.

Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 49ae6cc8

drivers/hwmon/lm87.c

+7 −5
Original line number Diff line number Diff line
@@ -199,6 +199,7 @@ struct lm87_data { 
	unsigned long last_updated; /* In jiffies */



	u8 channel;		/* register value */

	u8 config;		/* original register value */



	u8 in[8];		/* register value */

	u8 in_max[8];		/* register value */
@@ -832,6 +833,7 @@ static int lm87_probe(struct i2c_client *new_client, 
	sysfs_remove_group(&new_client->dev.kobj, &lm87_group);

	sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt);

exit_free:

	lm87_write_value(new_client, LM87_REG_CONFIG, data->config);

	kfree(data);

exit:

	return err;
@@ -840,12 +842,11 @@ static int lm87_probe(struct i2c_client *new_client, 
static void lm87_init_client(struct i2c_client *client)

{

	struct lm87_data *data = i2c_get_clientdata(client);

	u8 config;



	data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);

	data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;



	config = lm87_read_value(client, LM87_REG_CONFIG);

	if (!(config & 0x01)) {

	if (!(data->config & 0x01)) {

		int i;



		/* Limits are left uninitialized after power-up */
@@ -869,9 +870,9 @@ static void lm87_init_client(struct i2c_client *client) 
	}



	/* Make sure Start is set and INT#_Clear is clear */

	if ((config & 0x09) != 0x01)

	if ((data->config & 0x09) != 0x01)

		lm87_write_value(client, LM87_REG_CONFIG,

				 (config & 0x77) | 0x01);

				 (data->config & 0x77) | 0x01);

}



static int lm87_remove(struct i2c_client *client)
@@ -882,6 +883,7 @@ static int lm87_remove(struct i2c_client *client) 
	sysfs_remove_group(&client->dev.kobj, &lm87_group);

	sysfs_remove_group(&client->dev.kobj, &lm87_group_opt);



	lm87_write_value(client, LM87_REG_CONFIG, data->config);

	kfree(data);

	return 0;

}