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Commit 9a70ee81 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (it87) Use is_visible for fan attributes 



Simplify code and reduce object size by almost 500 bytes on x86_64.

Tested-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 87533770

drivers/hwmon/it87.c

+55 −85
Original line number Diff line number Diff line
@@ -1898,51 +1898,75 @@ static const struct attribute_group it87_group = { 
	.attrs = it87_attributes,

};



static struct attribute *it87_attributes_fan[6][3+1] = { {

static umode_t it87_fan_is_visible(struct kobject *kobj,

				   struct attribute *attr, int index)

{

	struct device *dev = container_of(kobj, struct device, kobj);

	struct it87_data *data = dev_get_drvdata(dev);

	int i = index / 5;	/* fan index */

	int a = index % 5;	/* attribute index */



	if (index >= 15) {	/* fan 4..6 don't have divisor attributes */

		i = (index - 15) / 4 + 3;

		a = (index - 15) % 4;

	}



	if (!(data->has_fan & (1 << i)))

		return 0;



	if (a == 3) {				/* beep */

		if (!data->has_beep)

			return 0;

		/* first fan beep attribute is writable */

		if (i == __ffs(data->has_fan))

			return attr->mode | S_IWUSR;

	}



	if (a == 4 && has_16bit_fans(data))	/* divisor */

		return 0;



	return attr->mode;

}



static struct attribute *it87_attributes_fan[] = {

	&sensor_dev_attr_fan1_input.dev_attr.attr,

	&sensor_dev_attr_fan1_min.dev_attr.attr,

	&sensor_dev_attr_fan1_alarm.dev_attr.attr,

	NULL

}, {

	&sensor_dev_attr_fan1_beep.dev_attr.attr,	/* 3 */

	&sensor_dev_attr_fan1_div.dev_attr.attr,	/* 4 */



	&sensor_dev_attr_fan2_input.dev_attr.attr,

	&sensor_dev_attr_fan2_min.dev_attr.attr,

	&sensor_dev_attr_fan2_alarm.dev_attr.attr,

	NULL

}, {

	&sensor_dev_attr_fan2_beep.dev_attr.attr,

	&sensor_dev_attr_fan2_div.dev_attr.attr,	/* 9 */



	&sensor_dev_attr_fan3_input.dev_attr.attr,

	&sensor_dev_attr_fan3_min.dev_attr.attr,

	&sensor_dev_attr_fan3_alarm.dev_attr.attr,

	NULL

}, {

	&sensor_dev_attr_fan4_input.dev_attr.attr,

	&sensor_dev_attr_fan3_beep.dev_attr.attr,

	&sensor_dev_attr_fan3_div.dev_attr.attr,	/* 14 */



	&sensor_dev_attr_fan4_input.dev_attr.attr,	/* 15 */

	&sensor_dev_attr_fan4_min.dev_attr.attr,

	&sensor_dev_attr_fan4_alarm.dev_attr.attr,

	NULL

}, {

	&sensor_dev_attr_fan5_input.dev_attr.attr,

	&sensor_dev_attr_fan4_beep.dev_attr.attr,



	&sensor_dev_attr_fan5_input.dev_attr.attr,	/* 19 */

	&sensor_dev_attr_fan5_min.dev_attr.attr,

	&sensor_dev_attr_fan5_alarm.dev_attr.attr,

	NULL

}, {

	&sensor_dev_attr_fan6_input.dev_attr.attr,

	&sensor_dev_attr_fan5_beep.dev_attr.attr,



	&sensor_dev_attr_fan6_input.dev_attr.attr,	/* 23 */

	&sensor_dev_attr_fan6_min.dev_attr.attr,

	&sensor_dev_attr_fan6_alarm.dev_attr.attr,

	&sensor_dev_attr_fan6_beep.dev_attr.attr,

	NULL

} };



static const struct attribute_group it87_group_fan[6] = {

	{ .attrs = it87_attributes_fan[0] },

	{ .attrs = it87_attributes_fan[1] },

	{ .attrs = it87_attributes_fan[2] },

	{ .attrs = it87_attributes_fan[3] },

	{ .attrs = it87_attributes_fan[4] },

	{ .attrs = it87_attributes_fan[5] },

};



static const struct attribute *it87_attributes_fan_div[] = {

	&sensor_dev_attr_fan1_div.dev_attr.attr,

	&sensor_dev_attr_fan2_div.dev_attr.attr,

	&sensor_dev_attr_fan3_div.dev_attr.attr,

static const struct attribute_group it87_group_fan = {

	.attrs = it87_attributes_fan,

	.is_visible = it87_fan_is_visible,

};



static struct attribute *it87_attributes_pwm[6][4+1] = { {
@@ -2046,15 +2070,6 @@ static const struct attribute_group it87_group_autopwm[3] = { 
	{ .attrs = it87_attributes_autopwm[2] },

};



static struct attribute *it87_attributes_fan_beep[] = {

	&sensor_dev_attr_fan1_beep.dev_attr.attr,

	&sensor_dev_attr_fan2_beep.dev_attr.attr,

	&sensor_dev_attr_fan3_beep.dev_attr.attr,

	&sensor_dev_attr_fan4_beep.dev_attr.attr,

	&sensor_dev_attr_fan5_beep.dev_attr.attr,

	&sensor_dev_attr_fan6_beep.dev_attr.attr,

};



static struct attribute *it87_attributes_vid[] = {

	&dev_attr_vrm.attr,

	&dev_attr_cpu0_vid.attr,
@@ -2448,18 +2463,8 @@ static void it87_remove_files(struct device *dev) 
	sysfs_remove_group(&dev->kobj, &it87_group);

	sysfs_remove_group(&dev->kobj, &it87_group_in);

	sysfs_remove_group(&dev->kobj, &it87_group_temp);

	sysfs_remove_group(&dev->kobj, &it87_group_fan);



	for (i = 0; i < 6; i++) {

		if (!(data->has_fan & (1 << i)))

			continue;

		sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);

		if (sio_data->beep_pin)

			sysfs_remove_file(&dev->kobj,

					  it87_attributes_fan_beep[i]);

		if (i < 3 && !has_16bit_fans(data))

			sysfs_remove_file(&dev->kobj,

					  it87_attributes_fan_div[i]);

	}

	for (i = 0; i < 6; i++) {

		if (sio_data->skip_pwm & (1 << i))

			continue;
@@ -2650,7 +2655,6 @@ static int it87_probe(struct platform_device *pdev) 
	struct it87_sio_data *sio_data = dev_get_platdata(dev);

	int err = 0, i;

	int enable_pwm_interface;

	int fan_beep_need_rw;



	res = platform_get_resource(pdev, IORESOURCE_IO, 0);

	if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
@@ -2751,43 +2755,9 @@ static int it87_probe(struct platform_device *pdev) 
	if (err)

		goto error;



	/* Do not create fan files for disabled fans */

	fan_beep_need_rw = 1;

	for (i = 0; i < 6; i++) {

		if (!(data->has_fan & (1 << i)))

			continue;

		err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);

		if (err)

			goto error;



		if (i < 3 && !has_16bit_fans(data)) {

			err = sysfs_create_file(&dev->kobj,

						it87_attributes_fan_div[i]);

			if (err)

				goto error;

		}



		if (sio_data->beep_pin) {

			err = sysfs_create_file(&dev->kobj,

						it87_attributes_fan_beep[i]);

	err = sysfs_create_group(&dev->kobj, &it87_group_fan);

	if (err)

		goto error;

			if (!fan_beep_need_rw)

				continue;



			/*

			 * As we have a single beep enable bit for all fans,

			 * only the first enabled fan has a writable attribute

			 * for it.

			 */

			if (sysfs_chmod_file(&dev->kobj,

					     it87_attributes_fan_beep[i],

					     S_IRUGO | S_IWUSR))

				dev_dbg(dev, "chmod +w fan%d_beep failed\n",

					i + 1);

			fan_beep_need_rw = 0;

		}

	}



	if (enable_pwm_interface) {

		for (i = 0; i < 6; i++) {