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author | Eddie James <eajames@linux.vnet.ibm.com> | 2018-11-08 15:05:28 -0600 |
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committer | Guenter Roeck <linux@roeck-us.net> | 2018-12-16 15:13:09 -0800 |
commit | 54076cb3b5ff21f6474f5fd254a0b018b24771df (patch) | |
tree | 35728c56d5b526fd174c577a1ff8cc2c35f69b5a /drivers | |
parent | c10e753d43ebd1d17e1c62bcee20c6124c2c7cca (diff) | |
download | linux-stable-54076cb3b5ff21f6474f5fd254a0b018b24771df.tar.gz linux-stable-54076cb3b5ff21f6474f5fd254a0b018b24771df.tar.bz2 linux-stable-54076cb3b5ff21f6474f5fd254a0b018b24771df.zip |
hwmon (occ): Add sensor attributes and register hwmon device
Setup the sensor attributes for every OCC sensor found by the first poll
response. Register the attributes with hwmon.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/hwmon/occ/common.c | 337 | ||||
-rw-r--r-- | drivers/hwmon/occ/common.h | 16 |
2 files changed, 353 insertions, 0 deletions
diff --git a/drivers/hwmon/occ/common.c b/drivers/hwmon/occ/common.c index f7220132ff28..c6c816135f67 100644 --- a/drivers/hwmon/occ/common.c +++ b/drivers/hwmon/occ/common.c @@ -1,11 +1,13 @@ // SPDX-License-Identifier: GPL-2.0 #include <linux/device.h> +#include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/math64.h> #include <linux/mutex.h> +#include <linux/sysfs.h> #include <asm/unaligned.h> #include "common.h" @@ -641,6 +643,324 @@ static ssize_t occ_show_extended(struct device *dev, return rc; } +/* + * Some helper macros to make it easier to define an occ_attribute. Since these + * are dynamically allocated, we shouldn't use the existing kernel macros which + * stringify the name argument. + */ +#define ATTR_OCC(_name, _mode, _show, _store) { \ + .attr = { \ + .name = _name, \ + .mode = VERIFY_OCTAL_PERMISSIONS(_mode), \ + }, \ + .show = _show, \ + .store = _store, \ +} + +#define SENSOR_ATTR_OCC(_name, _mode, _show, _store, _nr, _index) { \ + .dev_attr = ATTR_OCC(_name, _mode, _show, _store), \ + .index = _index, \ + .nr = _nr, \ +} + +#define OCC_INIT_ATTR(_name, _mode, _show, _store, _nr, _index) \ + ((struct sensor_device_attribute_2) \ + SENSOR_ATTR_OCC(_name, _mode, _show, _store, _nr, _index)) + +/* + * Allocate and instatiate sensor_device_attribute_2s. It's most efficient to + * use our own instead of the built-in hwmon attribute types. + */ +static int occ_setup_sensor_attrs(struct occ *occ) +{ + unsigned int i, s, num_attrs = 0; + struct device *dev = occ->bus_dev; + struct occ_sensors *sensors = &occ->sensors; + struct occ_attribute *attr; + struct temp_sensor_2 *temp; + ssize_t (*show_temp)(struct device *, struct device_attribute *, + char *) = occ_show_temp_1; + ssize_t (*show_freq)(struct device *, struct device_attribute *, + char *) = occ_show_freq_1; + ssize_t (*show_power)(struct device *, struct device_attribute *, + char *) = occ_show_power_1; + ssize_t (*show_caps)(struct device *, struct device_attribute *, + char *) = occ_show_caps_1_2; + + switch (sensors->temp.version) { + case 1: + num_attrs += (sensors->temp.num_sensors * 2); + break; + case 2: + num_attrs += (sensors->temp.num_sensors * 4); + show_temp = occ_show_temp_2; + break; + default: + sensors->temp.num_sensors = 0; + } + + switch (sensors->freq.version) { + case 2: + show_freq = occ_show_freq_2; + /* fall through */ + case 1: + num_attrs += (sensors->freq.num_sensors * 2); + break; + default: + sensors->freq.num_sensors = 0; + } + + switch (sensors->power.version) { + case 2: + show_power = occ_show_power_2; + /* fall through */ + case 1: + num_attrs += (sensors->power.num_sensors * 4); + break; + case 0xA0: + num_attrs += (sensors->power.num_sensors * 16); + show_power = occ_show_power_a0; + break; + default: + sensors->power.num_sensors = 0; + } + + switch (sensors->caps.version) { + case 1: + num_attrs += (sensors->caps.num_sensors * 7); + break; + case 3: + show_caps = occ_show_caps_3; + /* fall through */ + case 2: + num_attrs += (sensors->caps.num_sensors * 8); + break; + default: + sensors->caps.num_sensors = 0; + } + + switch (sensors->extended.version) { + case 1: + num_attrs += (sensors->extended.num_sensors * 3); + break; + default: + sensors->extended.num_sensors = 0; + } + + occ->attrs = devm_kzalloc(dev, sizeof(*occ->attrs) * num_attrs, + GFP_KERNEL); + if (!occ->attrs) + return -ENOMEM; + + /* null-terminated list */ + occ->group.attrs = devm_kzalloc(dev, sizeof(*occ->group.attrs) * + num_attrs + 1, GFP_KERNEL); + if (!occ->group.attrs) + return -ENOMEM; + + attr = occ->attrs; + + for (i = 0; i < sensors->temp.num_sensors; ++i) { + s = i + 1; + temp = ((struct temp_sensor_2 *)sensors->temp.data) + i; + + snprintf(attr->name, sizeof(attr->name), "temp%d_label", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_temp, NULL, + 0, i); + attr++; + + if (sensors->temp.version > 1 && + temp->fru_type == OCC_FRU_TYPE_VRM) { + snprintf(attr->name, sizeof(attr->name), + "temp%d_alarm", s); + } else { + snprintf(attr->name, sizeof(attr->name), + "temp%d_input", s); + } + + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_temp, NULL, + 1, i); + attr++; + + if (sensors->temp.version > 1) { + snprintf(attr->name, sizeof(attr->name), + "temp%d_fru_type", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_temp, NULL, 2, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), + "temp%d_fault", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_temp, NULL, 3, i); + attr++; + } + } + + for (i = 0; i < sensors->freq.num_sensors; ++i) { + s = i + 1; + + snprintf(attr->name, sizeof(attr->name), "freq%d_label", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_freq, NULL, + 0, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), "freq%d_input", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_freq, NULL, + 1, i); + attr++; + } + + if (sensors->power.version == 0xA0) { + /* + * Special case for many-attribute power sensor. Split it into + * a sensor number per power type, emulating several sensors. + */ + for (i = 0; i < sensors->power.num_sensors; ++i) { + unsigned int j; + unsigned int nr = 0; + + s = (i * 4) + 1; + + for (j = 0; j < 4; ++j) { + snprintf(attr->name, sizeof(attr->name), + "power%d_label", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_power, NULL, + nr++, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), + "power%d_average", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_power, NULL, + nr++, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), + "power%d_average_interval", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_power, NULL, + nr++, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), + "power%d_input", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_power, NULL, + nr++, i); + attr++; + + s++; + } + } + } else { + for (i = 0; i < sensors->power.num_sensors; ++i) { + s = i + 1; + + snprintf(attr->name, sizeof(attr->name), + "power%d_label", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_power, NULL, 0, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), + "power%d_average", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_power, NULL, 1, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), + "power%d_average_interval", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_power, NULL, 2, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), + "power%d_input", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_power, NULL, 3, i); + attr++; + } + } + + if (sensors->caps.num_sensors >= 1) { + s = sensors->power.num_sensors + 1; + + snprintf(attr->name, sizeof(attr->name), "power%d_label", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, + 0, 0); + attr++; + + snprintf(attr->name, sizeof(attr->name), "power%d_cap", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, + 1, 0); + attr++; + + snprintf(attr->name, sizeof(attr->name), "power%d_input", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, + 2, 0); + attr++; + + snprintf(attr->name, sizeof(attr->name), + "power%d_cap_not_redundant", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, + 3, 0); + attr++; + + snprintf(attr->name, sizeof(attr->name), "power%d_cap_max", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, + 4, 0); + attr++; + + snprintf(attr->name, sizeof(attr->name), "power%d_cap_min", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, show_caps, NULL, + 5, 0); + attr++; + + snprintf(attr->name, sizeof(attr->name), "power%d_cap_user", + s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0644, show_caps, + occ_store_caps_user, 6, 0); + attr++; + + if (sensors->caps.version > 1) { + snprintf(attr->name, sizeof(attr->name), + "power%d_cap_user_source", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + show_caps, NULL, 7, 0); + attr++; + } + } + + for (i = 0; i < sensors->extended.num_sensors; ++i) { + s = i + 1; + + snprintf(attr->name, sizeof(attr->name), "extn%d_label", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + occ_show_extended, NULL, 0, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), "extn%d_flags", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + occ_show_extended, NULL, 1, i); + attr++; + + snprintf(attr->name, sizeof(attr->name), "extn%d_input", s); + attr->sensor = OCC_INIT_ATTR(attr->name, 0444, + occ_show_extended, NULL, 2, i); + attr++; + } + + /* put the sensors in the group */ + for (i = 0; i < num_attrs; ++i) { + sysfs_attr_init(&occ->attrs[i].sensor.dev_attr.attr); + occ->group.attrs[i] = &occ->attrs[i].sensor.dev_attr.attr; + } + + return 0; +} + /* only need to do this once at startup, as OCC won't change sensors on us */ static void occ_parse_poll_response(struct occ *occ) { @@ -704,6 +1024,7 @@ int occ_setup(struct occ *occ, const char *name) int rc; mutex_init(&occ->lock); + occ->groups[0] = &occ->group; /* no need to lock */ rc = occ_poll(occ); @@ -718,5 +1039,21 @@ int occ_setup(struct occ *occ, const char *name) occ_parse_poll_response(occ); + rc = occ_setup_sensor_attrs(occ); + if (rc) { + dev_err(occ->bus_dev, "failed to setup sensor attrs: %d\n", + rc); + return rc; + } + + occ->hwmon = devm_hwmon_device_register_with_groups(occ->bus_dev, name, + occ, occ->groups); + if (IS_ERR(occ->hwmon)) { + rc = PTR_ERR(occ->hwmon); + dev_err(occ->bus_dev, "failed to register hwmon device: %d\n", + rc); + return rc; + } + return 0; } diff --git a/drivers/hwmon/occ/common.h b/drivers/hwmon/occ/common.h index a363462f5f30..9d01973d93d8 100644 --- a/drivers/hwmon/occ/common.h +++ b/drivers/hwmon/occ/common.h @@ -3,7 +3,9 @@ #ifndef OCC_COMMON_H #define OCC_COMMON_H +#include <linux/hwmon-sysfs.h> #include <linux/mutex.h> +#include <linux/sysfs.h> struct device; @@ -76,6 +78,15 @@ struct occ_sensors { struct occ_sensor extended; }; +/* + * Use our own attribute struct so we can dynamically allocate space for the + * name. + */ +struct occ_attribute { + char name[32]; + struct sensor_device_attribute_2 sensor; +}; + struct occ { struct device *bus_dev; @@ -88,6 +99,11 @@ struct occ { unsigned long last_update; struct mutex lock; /* lock OCC access */ + + struct device *hwmon; + struct occ_attribute *attrs; + struct attribute_group group; + const struct attribute_group *groups[2]; }; int occ_setup(struct occ *occ, const char *name); |