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hwmon: (adt7475) Add VID support for the ADT7476
The ADT7476 has 5 dedicated pins for VID input, and the +12V input can optionally be used as a 6th VID pin. Add support for VID input. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: "Darrick J. Wong" <djwong@us.ibm.com>
This commit is contained in:
Jean Delvare
parent
b058b85961
commit
54fe4671aa
3 changed files with 65 additions and 4 deletions
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@ -70,7 +70,7 @@ ADT7475:
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ADT7476:
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* 5 voltage inputs
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* VID support (not implemented)
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* VID support
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ADT7490:
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* 6 voltage inputs
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@ -207,6 +207,7 @@ config SENSORS_ADT7473
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config SENSORS_ADT7475
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tristate "Analog Devices ADT7473, ADT7475, ADT7476 and ADT7490"
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depends on I2C && EXPERIMENTAL
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select HWMON_VID
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help
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If you say yes here you get support for the Analog Devices
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ADT7473, ADT7475, ADT7476 and ADT7490 hardware monitoring
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@ -18,6 +18,7 @@
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/hwmon-vid.h>
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#include <linux/err.h>
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/* Indexes for the sysfs hooks */
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@ -110,6 +111,7 @@
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#define CONFIG5_TWOSCOMP 0x01
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#define CONFIG5_TEMPOFFSET 0x02
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#define CONFIG5_VIDGPIO 0x10 /* ADT7476 only */
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/* ADT7475 Settings */
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@ -171,6 +173,7 @@ struct adt7475_data {
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u8 bypass_attn; /* Bypass voltage attenuator */
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u8 has_pwm2:1;
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u8 has_fan4:1;
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u8 has_vid:1;
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u32 alarms;
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u16 voltage[3][6];
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u16 temp[7][3];
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@ -179,6 +182,9 @@ struct adt7475_data {
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u8 range[3];
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u8 pwmctl[3];
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u8 pwmchan[3];
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u8 vid;
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u8 vrm;
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};
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static struct i2c_driver adt7475_driver;
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@ -864,6 +870,35 @@ static ssize_t set_pwm_at_crit(struct device *dev,
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return count;
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}
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static ssize_t show_vrm(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct adt7475_data *data = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", (int)data->vrm);
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}
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static ssize_t set_vrm(struct device *dev, struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct adt7475_data *data = dev_get_drvdata(dev);
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long val;
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if (strict_strtol(buf, 10, &val))
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return -EINVAL;
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if (val < 0 || val > 255)
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return -EINVAL;
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data->vrm = val;
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return count;
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}
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static ssize_t show_vid(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct adt7475_data *data = adt7475_update_device(dev);
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return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
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}
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static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_voltage, NULL, INPUT, 0);
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static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_voltage,
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set_voltage, MAX, 0);
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@ -1007,6 +1042,9 @@ static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
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static DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
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show_pwm_at_crit, set_pwm_at_crit);
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static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, set_vrm);
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static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
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static struct attribute *adt7475_attrs[] = {
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&sensor_dev_attr_in1_input.dev_attr.attr,
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&sensor_dev_attr_in1_max.dev_attr.attr,
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@ -1119,6 +1157,12 @@ static struct attribute *in5_attrs[] = {
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NULL
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};
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static struct attribute *vid_attrs[] = {
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&dev_attr_cpu0_vid.attr,
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&dev_attr_vrm.attr,
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NULL
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};
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static struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs };
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static struct attribute_group fan4_attr_group = { .attrs = fan4_attrs };
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static struct attribute_group pwm2_attr_group = { .attrs = pwm2_attrs };
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@ -1126,6 +1170,7 @@ static struct attribute_group in0_attr_group = { .attrs = in0_attrs };
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static struct attribute_group in3_attr_group = { .attrs = in3_attrs };
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static struct attribute_group in4_attr_group = { .attrs = in4_attrs };
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static struct attribute_group in5_attr_group = { .attrs = in5_attrs };
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static struct attribute_group vid_attr_group = { .attrs = vid_attrs };
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static int adt7475_detect(struct i2c_client *client, int kind,
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struct i2c_board_info *info)
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@ -1180,6 +1225,8 @@ static void adt7475_remove_files(struct i2c_client *client,
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sysfs_remove_group(&client->dev.kobj, &in4_attr_group);
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if (data->has_voltage & (1 << 5))
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sysfs_remove_group(&client->dev.kobj, &in5_attr_group);
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if (data->has_vid)
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sysfs_remove_group(&client->dev.kobj, &vid_attr_group);
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}
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static int adt7475_probe(struct i2c_client *client,
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@ -1247,11 +1294,14 @@ static int adt7475_probe(struct i2c_client *client,
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data->has_voltage |= (1 << 0); /* in0 */
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}
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/* On the ADT7476, the +12V input pin may instead be used as VID5 */
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/* On the ADT7476, the +12V input pin may instead be used as VID5,
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and VID pins may alternatively be used as GPIO */
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if (id->driver_data == adt7476) {
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u8 vid = adt7475_read(REG_VID);
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if (!(vid & VID_VIDSEL))
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data->has_voltage |= (1 << 4); /* in4 */
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data->has_vid = !(adt7475_read(REG_CONFIG5) & CONFIG5_VIDGPIO);
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}
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/* Voltage attenuators can be bypassed, globally or individually */
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@ -1304,6 +1354,12 @@ static int adt7475_probe(struct i2c_client *client,
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if (ret)
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goto eremove;
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}
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if (data->has_vid) {
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data->vrm = vid_which_vrm();
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ret = sysfs_create_group(&client->dev.kobj, &vid_attr_group);
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if (ret)
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goto eremove;
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}
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data->hwmon_dev = hwmon_device_register(&client->dev);
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if (IS_ERR(data->hwmon_dev)) {
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@ -1314,11 +1370,12 @@ static int adt7475_probe(struct i2c_client *client,
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dev_info(&client->dev, "%s device, revision %d\n",
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names[id->driver_data], revision);
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if ((data->has_voltage & 0x11) || data->has_fan4 || data->has_pwm2)
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dev_info(&client->dev, "Optional features:%s%s%s%s\n",
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dev_info(&client->dev, "Optional features:%s%s%s%s%s\n",
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(data->has_voltage & (1 << 0)) ? " in0" : "",
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(data->has_voltage & (1 << 4)) ? " in4" : "",
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data->has_fan4 ? " fan4" : "",
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data->has_pwm2 ? " pwm2" : "");
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data->has_pwm2 ? " pwm2" : "",
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data->has_vid ? " vid" : "");
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if (data->bypass_attn)
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dev_info(&client->dev, "Bypassing attenuators on:%s%s%s%s\n",
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(data->bypass_attn & (1 << 0)) ? " in0" : "",
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@ -1472,6 +1529,9 @@ static struct adt7475_data *adt7475_update_device(struct device *dev)
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data->pwm[INPUT][i] = adt7475_read(PWM_REG(i));
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}
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if (data->has_vid)
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data->vid = adt7475_read(REG_VID) & 0x3f;
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data->measure_updated = jiffies;
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}
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