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Commit 455f791e authored by Jean Delvare's avatar Jean Delvare Committed by Mark M. Hoffman
Browse files

hwmon: (lm85) Make the pwmN_enable files writable 



Make the pwmN_enable files writable. This makes it possible to use
standard fan speed control tools (pwmconfig, fancontrol) with the lm85
driver.

I left the non-standard pwmN_auto_channels files in place, as they
give additional control for the automatic mode, and some users might
be used to them by now.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
Signed-off-by: default avatarMark M. Hoffman <mhoffman@lightlink.com>
parent 4b4df95d

drivers/hwmon/lm85.c

+38 −2
Original line number Original line Diff line number Diff line
@@ -536,11 +536,47 @@ static ssize_t show_pwm_enable(struct device *dev, struct device_attribute 
	return sprintf(buf, "%d\n", enable);

	return sprintf(buf, "%d\n", enable);

}

}





static ssize_t set_pwm_enable(struct device *dev, struct device_attribute

		*attr, const char *buf, size_t count)

{

	int nr = to_sensor_dev_attr(attr)->index;

	struct i2c_client *client = to_i2c_client(dev);

	struct lm85_data *data = i2c_get_clientdata(client);

	long val = simple_strtol(buf, NULL, 10);

	u8 config;



	switch (val) {

	case 0:

		config = 3;

		break;

	case 1:

		config = 7;

		break;

	case 2:

		/* Here we have to choose arbitrarily one of the 5 possible

		   configurations; I go for the safest */

		config = 6;

		break;

	default:

		return -EINVAL;

	}



	mutex_lock(&data->update_lock);

	data->autofan[nr].config = lm85_read_value(client,

		LM85_REG_AFAN_CONFIG(nr));

	data->autofan[nr].config = (data->autofan[nr].config & ~0xe0)

		| (config << 5);

	lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),

		data->autofan[nr].config);

	mutex_unlock(&data->update_lock);

	return count;

}



#define show_pwm_reg(offset)						\

#define show_pwm_reg(offset)						\

static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,		\

static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,		\

		show_pwm, set_pwm, offset - 1);				\

		show_pwm, set_pwm, offset - 1);				\

static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO,		\

static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR,	\

		show_pwm_enable, NULL, offset - 1)

		show_pwm_enable, set_pwm_enable, offset - 1)





show_pwm_reg(1);

show_pwm_reg(1);

show_pwm_reg(2);

show_pwm_reg(2);