Commit a03d8969 authored by Eddie James's avatar Eddie James Committed by Guenter Roeck
Browse files

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: default avatarEddie James <eajames@linux.ibm.com>
Reviewed-by: default avatarJoel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20220215151022.7498-4-eajames@linux.ibm.com


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent a25126fc

drivers/hwmon/occ/sysfs.c

+24 −0
Original line number Diff line number Diff line
@@ -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;