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bnxt_en: Use non-standard attribute to expose shutdown temperature

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Implement the sysfs attributes directly in the driver for
shutdown threshold temperature and pass an extra attribute group
to the hwmon core when registering the hwmon device.

Link: https://lore.kernel.org/netdev/20230815045658.80494-12-michael.chan@broadcom.com/
 Cc: Jean Delvare <jdelvare@suse.com>
 Cc: Guenter Roeck <linux@roeck-us.net>
 Cc: linux-hwmon@vger.kernel.org
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kalesh AP 2023-09-26 20:57:31 -07:00 committed by David S. Miller
parent cd13244f19
commit 3d9cf96206
1 changed files with 53 additions and 1 deletions
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54
drivers/net/ethernet/broadcom/bnxt/bnxt_hwmon.c
View File

@ -131,6 +131,57 @@ static const struct hwmon_chip_info bnxt_hwmon_chip_info = {
.info = bnxt_hwmon_info,
};
static ssize_t temp1_shutdown_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bnxt *bp = dev_get_drvdata(dev);
return sysfs_emit(buf, "%u\n", bp->shutdown_thresh_temp * 1000);
}
static ssize_t temp1_shutdown_alarm_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bnxt *bp = dev_get_drvdata(dev);
u8 temp;
int rc;
rc = bnxt_hwrm_temp_query(bp, &temp);
if (rc)
return -EIO;
return sysfs_emit(buf, "%u\n", temp >= bp->shutdown_thresh_temp);
}
static DEVICE_ATTR_RO(temp1_shutdown);
static DEVICE_ATTR_RO(temp1_shutdown_alarm);
static struct attribute *bnxt_temp_extra_attrs[] = {
&dev_attr_temp1_shutdown.attr,
&dev_attr_temp1_shutdown_alarm.attr,
NULL,
};
static umode_t bnxt_temp_extra_attrs_visible(struct kobject *kobj,
struct attribute *attr, int index)
{
struct device *dev = kobj_to_dev(kobj);
struct bnxt *bp = dev_get_drvdata(dev);
/* Shutdown temperature setting in NVM is optional */
if (!(bp->fw_cap & BNXT_FW_CAP_THRESHOLD_TEMP_SUPPORTED) ||
!bp->shutdown_thresh_temp)
return 0;
return attr->mode;
}
static const struct attribute_group bnxt_temp_extra_group = {
.attrs = bnxt_temp_extra_attrs,
.is_visible = bnxt_temp_extra_attrs_visible,
};
__ATTRIBUTE_GROUPS(bnxt_temp_extra);
void bnxt_hwmon_uninit(struct bnxt *bp)
{
if (bp->hwmon_dev) {
@ -156,7 +207,8 @@ void bnxt_hwmon_init(struct bnxt *bp)
bp->hwmon_dev = hwmon_device_register_with_info(&pdev->dev,
DRV_MODULE_NAME, bp,
&bnxt_hwmon_chip_info, NULL);
&bnxt_hwmon_chip_info,
bnxt_temp_extra_groups);
if (IS_ERR(bp->hwmon_dev)) {
bp->hwmon_dev = NULL;
dev_warn(&pdev->dev, "Cannot register hwmon device\n");