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Commit 80646b95 authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
Browse files

hwmon: (w83795) Only start monitoring if needed 



This saves an SMBus write if monitoring was already enabled.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 86ef4d2f

drivers/hwmon/w83795.c

+10 −3
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); 
#define W83795_REG_I2C_ADDR		0xfc

#define W83795_REG_CONFIG		0x01

#define W83795_REG_CONFIG_CONFIG48	0x04

#define W83795_REG_CONFIG_START	0x01



/* Multi-Function Pin Ctrl Registers */

#define W83795_REG_VOLT_CTRL1		0x02
@@ -1664,12 +1665,18 @@ static const struct sensor_device_attribute_2 sda_single_files[] = { 


static void w83795_init_client(struct i2c_client *client)

{

	u8 config;



	if (reset)

		w83795_write(client, W83795_REG_CONFIG, 0x80);



	/* Start monitoring */

	/* Start monitoring if needed */

	config = w83795_read(client, W83795_REG_CONFIG);

	if (!(config & W83795_REG_CONFIG_START)) {

		dev_info(&client->dev, "Enabling monitoring operations\n");

		w83795_write(client, W83795_REG_CONFIG,

		     w83795_read(client, W83795_REG_CONFIG) | 0x01);

			     config | W83795_REG_CONFIG_START);

	}

}



static int w83795_get_device_id(struct i2c_client *client)