hwmon: (occ) Add sysfs entries for additional extended status bits

Add sysfs entries for DVFS due to a VRM Vdd over-temperature condition,
and add the GPU throttling condition bits (such that if bit 1 is set,
GPU1 is throttling).

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20220215151022.7498-4-eajames@linux.ibm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/occ/sysfs.c b/drivers/hwmon/occ/sysfs.c
index 88f655887c958d8699b76a820fd23c1927f5fe0d..b2f788a777469367676fb63f20788cd6005d089a 100644 (file)
--- a/drivers/hwmon/occ/sysfs.c
+++ b/drivers/hwmon/occ/sysfs.c
@@ -19,6 +19,8 @@
 #define OCC_EXT_STAT_DVFS_POWER                BIT(6)
 #define OCC_EXT_STAT_MEM_THROTTLE      BIT(5)
 #define OCC_EXT_STAT_QUICK_DROP                BIT(4)
+#define OCC_EXT_STAT_DVFS_VDD          BIT(3)
+#define OCC_EXT_STAT_GPU_THROTTLE      GENMASK(2, 0)
 
 static ssize_t occ_sysfs_show(struct device *dev,
                              struct device_attribute *attr, char *buf)
@@ -69,6 +71,12 @@ static ssize_t occ_sysfs_show(struct device *dev,
        case 9:
                val = header->mode;
                break;
+       case 10:
+               val = !!(header->ext_status & OCC_EXT_STAT_DVFS_VDD);
+               break;
+       case 11:
+               val = header->ext_status & OCC_EXT_STAT_GPU_THROTTLE;
+               break;
        default:
                return -EINVAL;
        }
@@ -96,6 +104,8 @@ static SENSOR_DEVICE_ATTR(occ_state, 0444, occ_sysfs_show, NULL, 6);
 static SENSOR_DEVICE_ATTR(occs_present, 0444, occ_sysfs_show, NULL, 7);
 static SENSOR_DEVICE_ATTR(occ_ips_status, 0444, occ_sysfs_show, NULL, 8);
 static SENSOR_DEVICE_ATTR(occ_mode, 0444, occ_sysfs_show, NULL, 9);
+static SENSOR_DEVICE_ATTR(occ_dvfs_vdd, 0444, occ_sysfs_show, NULL, 10);
+static SENSOR_DEVICE_ATTR(occ_gpu_throttle, 0444, occ_sysfs_show, NULL, 11);
 static DEVICE_ATTR_RO(occ_error);
 
 static struct attribute *occ_attributes[] = {
@@ -109,6 +119,8 @@ static struct attribute *occ_attributes[] = {
        &sensor_dev_attr_occs_present.dev_attr.attr,
        &sensor_dev_attr_occ_ips_status.dev_attr.attr,
        &sensor_dev_attr_occ_mode.dev_attr.attr,
+       &sensor_dev_attr_occ_dvfs_vdd.dev_attr.attr,
+       &sensor_dev_attr_occ_gpu_throttle.dev_attr.attr,
        &dev_attr_occ_error.attr,
        NULL
 };
@@ -166,6 +178,18 @@ void occ_sysfs_poll_done(struct occ *occ)
                sysfs_notify(&occ->bus_dev->kobj, NULL, name);
        }
 
+       if ((header->ext_status & OCC_EXT_STAT_DVFS_VDD) !=
+           (occ->prev_ext_stat & OCC_EXT_STAT_DVFS_VDD)) {
+               name = sensor_dev_attr_occ_dvfs_vdd.dev_attr.attr.name;
+               sysfs_notify(&occ->bus_dev->kobj, NULL, name);
+       }
+
+       if ((header->ext_status & OCC_EXT_STAT_GPU_THROTTLE) !=
+           (occ->prev_ext_stat & OCC_EXT_STAT_GPU_THROTTLE)) {
+               name = sensor_dev_attr_occ_gpu_throttle.dev_attr.attr.name;
+               sysfs_notify(&occ->bus_dev->kobj, NULL, name);
+       }
+
        if ((header->status & OCC_STAT_MASTER) &&
            header->occs_present != occ->prev_occs_present) {
                name = sensor_dev_attr_occs_present.dev_attr.attr.name;