Re: [PATCH 3/3] hwmon: (occ) Add new temperature sensor type

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On 5/6/20 10:57 AM, Guenter Roeck wrote:
On Fri, May 01, 2020 at 10:08:33AM -0500, Eddie James wrote:
The latest version of the On-Chip Controller (OCC) has a different
format for the temperature sensor data. Add a new temperature sensor
version to handle this data.

Signed-off-by: Eddie James <eajames@xxxxxxxxxxxxx>
For my reference:

Acked-by: Guenter Roeck <linux@xxxxxxxxxxxx>

I assume this depends on at least patch 2 of the series, so we'll have
to wait for that to be accepted.


Thanks Guenter. Yes that's correct.

Eddie



Guenter

---
  drivers/hwmon/occ/common.c | 75 ++++++++++++++++++++++++++++++++++++++
  1 file changed, 75 insertions(+)

diff --git a/drivers/hwmon/occ/common.c b/drivers/hwmon/occ/common.c
index 30e18eb60da7..52af0e728232 100644
--- a/drivers/hwmon/occ/common.c
+++ b/drivers/hwmon/occ/common.c
@@ -41,6 +41,14 @@ struct temp_sensor_2 {
  	u8 value;
  } __packed;
+struct temp_sensor_10 {
+	u32 sensor_id;
+	u8 fru_type;
+	u8 value;
+	u8 throttle;
+	u8 reserved;
+} __packed;
+
  struct freq_sensor_1 {
  	u16 sensor_id;
  	u16 value;
@@ -307,6 +315,60 @@ static ssize_t occ_show_temp_2(struct device *dev,
  	return snprintf(buf, PAGE_SIZE - 1, "%u\n", val);
  }
+static ssize_t occ_show_temp_10(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	int rc;
+	u32 val = 0;
+	struct temp_sensor_10 *temp;
+	struct occ *occ = dev_get_drvdata(dev);
+	struct occ_sensors *sensors = &occ->sensors;
+	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+
+	rc = occ_update_response(occ);
+	if (rc)
+		return rc;
+
+	temp = ((struct temp_sensor_10 *)sensors->temp.data) + sattr->index;
+
+	switch (sattr->nr) {
+	case 0:
+		val = get_unaligned_be32(&temp->sensor_id);
+		break;
+	case 1:
+		val = temp->value;
+		if (val == OCC_TEMP_SENSOR_FAULT)
+			return -EREMOTEIO;
+
+		/*
+		 * VRM doesn't return temperature, only alarm bit. This
+		 * attribute maps to tempX_alarm instead of tempX_input for
+		 * VRM
+		 */
+		if (temp->fru_type != OCC_FRU_TYPE_VRM) {
+			/* sensor not ready */
+			if (val == 0)
+				return -EAGAIN;
+
+			val *= 1000;
+		}
+		break;
+	case 2:
+		val = temp->fru_type;
+		break;
+	case 3:
+		val = temp->value == OCC_TEMP_SENSOR_FAULT;
+		break;
+	case 4:
+		val = temp->throttle * 1000;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return snprintf(buf, PAGE_SIZE - 1, "%u\n", val);
+}
+
  static ssize_t occ_show_freq_1(struct device *dev,
  			       struct device_attribute *attr, char *buf)
  {
@@ -745,6 +807,10 @@ static int occ_setup_sensor_attrs(struct occ *occ)
  		num_attrs += (sensors->temp.num_sensors * 4);
  		show_temp = occ_show_temp_2;
  		break;
+	case 0x10:
+		num_attrs += (sensors->temp.num_sensors * 5);
+		show_temp = occ_show_temp_10;
+		break;
  	default:
  		sensors->temp.num_sensors = 0;
  	}
@@ -844,6 +910,15 @@ static int occ_setup_sensor_attrs(struct occ *occ)
  			attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
  						     show_temp, NULL, 3, i);
  			attr++;
+
+			if (sensors->temp.version == 0x10) {
+				snprintf(attr->name, sizeof(attr->name),
+					 "temp%d_max", s);
+				attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
+							     show_temp, NULL,
+							     4, i);
+				attr++;
+			}
  		}
  	}



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