^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) // Copyright IBM Corp 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /* OCC status register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define OCC_STAT_MASTER BIT(7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define OCC_STAT_ACTIVE BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /* OCC extended status register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define OCC_EXT_STAT_DVFS_OT BIT(7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define OCC_EXT_STAT_DVFS_POWER BIT(6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define OCC_EXT_STAT_MEM_THROTTLE BIT(5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define OCC_EXT_STAT_QUICK_DROP BIT(4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static ssize_t occ_sysfs_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct occ *occ = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct occ_poll_response_header *header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) rc = occ_update_response(occ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) header = (struct occ_poll_response_header *)occ->resp.data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) switch (sattr->index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) val = !!(header->status & OCC_STAT_MASTER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) val = !!(header->status & OCC_STAT_ACTIVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) val = !!(header->ext_status & OCC_EXT_STAT_DVFS_OT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) case 3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) val = !!(header->ext_status & OCC_EXT_STAT_DVFS_POWER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) case 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) val = !!(header->ext_status & OCC_EXT_STAT_MEM_THROTTLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) case 5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) val = !!(header->ext_status & OCC_EXT_STAT_QUICK_DROP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) case 6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) val = header->occ_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) case 7:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (header->status & OCC_STAT_MASTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) val = hweight8(header->occs_present);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) val = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return snprintf(buf, PAGE_SIZE - 1, "%d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static ssize_t occ_error_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct occ *occ = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) occ_update_response(occ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return snprintf(buf, PAGE_SIZE - 1, "%d\n", occ->error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static SENSOR_DEVICE_ATTR(occ_master, 0444, occ_sysfs_show, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static SENSOR_DEVICE_ATTR(occ_active, 0444, occ_sysfs_show, NULL, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static SENSOR_DEVICE_ATTR(occ_dvfs_overtemp, 0444, occ_sysfs_show, NULL, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static SENSOR_DEVICE_ATTR(occ_dvfs_power, 0444, occ_sysfs_show, NULL, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static SENSOR_DEVICE_ATTR(occ_mem_throttle, 0444, occ_sysfs_show, NULL, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static SENSOR_DEVICE_ATTR(occ_quick_pwr_drop, 0444, occ_sysfs_show, NULL, 5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static SENSOR_DEVICE_ATTR(occ_state, 0444, occ_sysfs_show, NULL, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static SENSOR_DEVICE_ATTR(occs_present, 0444, occ_sysfs_show, NULL, 7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static DEVICE_ATTR_RO(occ_error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static struct attribute *occ_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) &sensor_dev_attr_occ_master.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) &sensor_dev_attr_occ_active.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) &sensor_dev_attr_occ_dvfs_overtemp.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) &sensor_dev_attr_occ_dvfs_power.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) &sensor_dev_attr_occ_mem_throttle.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) &sensor_dev_attr_occ_quick_pwr_drop.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) &sensor_dev_attr_occ_state.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) &sensor_dev_attr_occs_present.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) &dev_attr_occ_error.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static const struct attribute_group occ_sysfs = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .attrs = occ_attributes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) void occ_sysfs_poll_done(struct occ *occ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct occ_poll_response_header *header =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) (struct occ_poll_response_header *)occ->resp.data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * On the first poll response, we haven't yet created the sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * attributes, so don't make any notify calls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (!occ->hwmon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if ((header->status & OCC_STAT_MASTER) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) (occ->prev_stat & OCC_STAT_MASTER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) name = sensor_dev_attr_occ_master.dev_attr.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) sysfs_notify(&occ->bus_dev->kobj, NULL, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if ((header->status & OCC_STAT_ACTIVE) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) (occ->prev_stat & OCC_STAT_ACTIVE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) name = sensor_dev_attr_occ_active.dev_attr.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) sysfs_notify(&occ->bus_dev->kobj, NULL, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if ((header->ext_status & OCC_EXT_STAT_DVFS_OT) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) (occ->prev_ext_stat & OCC_EXT_STAT_DVFS_OT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) name = sensor_dev_attr_occ_dvfs_overtemp.dev_attr.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) sysfs_notify(&occ->bus_dev->kobj, NULL, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if ((header->ext_status & OCC_EXT_STAT_DVFS_POWER) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) (occ->prev_ext_stat & OCC_EXT_STAT_DVFS_POWER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) name = sensor_dev_attr_occ_dvfs_power.dev_attr.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) sysfs_notify(&occ->bus_dev->kobj, NULL, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if ((header->ext_status & OCC_EXT_STAT_MEM_THROTTLE) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) (occ->prev_ext_stat & OCC_EXT_STAT_MEM_THROTTLE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) name = sensor_dev_attr_occ_mem_throttle.dev_attr.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) sysfs_notify(&occ->bus_dev->kobj, NULL, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if ((header->ext_status & OCC_EXT_STAT_QUICK_DROP) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) (occ->prev_ext_stat & OCC_EXT_STAT_QUICK_DROP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) name = sensor_dev_attr_occ_quick_pwr_drop.dev_attr.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) sysfs_notify(&occ->bus_dev->kobj, NULL, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if ((header->status & OCC_STAT_MASTER) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) header->occs_present != occ->prev_occs_present) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) name = sensor_dev_attr_occs_present.dev_attr.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) sysfs_notify(&occ->bus_dev->kobj, NULL, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (occ->error && occ->error != occ->prev_error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) name = dev_attr_occ_error.attr.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) sysfs_notify(&occ->bus_dev->kobj, NULL, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /* no notifications for OCC state; doesn't indicate error condition */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) occ->prev_error = occ->error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) occ->prev_stat = header->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) occ->prev_ext_stat = header->ext_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) occ->prev_occs_present = header->occs_present;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) int occ_setup_sysfs(struct occ *occ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return sysfs_create_group(&occ->bus_dev->kobj, &occ_sysfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) void occ_shutdown(struct occ *occ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) sysfs_remove_group(&occ->bus_dev->kobj, &occ_sysfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) EXPORT_SYMBOL_GPL(occ_shutdown);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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