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SubjectRe: [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@linux.ibm.com>
> For my reference:
>
> Acked-by: Guenter Roeck <linux@roeck-us.net>
>
> 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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