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path: root/drivers/hwmon/acpi_power_meter.c
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Diffstat (limited to 'drivers/hwmon/acpi_power_meter.c')
-rw-r--r--drivers/hwmon/acpi_power_meter.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/hwmon/acpi_power_meter.c b/drivers/hwmon/acpi_power_meter.c
index 703666b95b..6c8a9c8635 100644
--- a/drivers/hwmon/acpi_power_meter.c
+++ b/drivers/hwmon/acpi_power_meter.c
@@ -883,6 +883,22 @@ static int acpi_power_meter_add(struct acpi_device *device)
strcpy(acpi_device_class(device), ACPI_POWER_METER_CLASS);
device->driver_data = resource;
+#if IS_REACHABLE(CONFIG_ACPI_IPMI)
+ /*
+ * On Dell systems several methods of acpi_power_meter access
+ * variables in IPMI region, so wait until IPMI space handler is
+ * installed by acpi_ipmi and also wait until SMI is selected to make
+ * the space handler fully functional.
+ */
+ if (dmi_match(DMI_SYS_VENDOR, "Dell Inc.")) {
+ struct acpi_device *ipi_device = acpi_dev_get_first_match_dev("IPI0001", NULL, -1);
+
+ if (ipi_device && acpi_wait_for_acpi_ipmi())
+ dev_warn(&device->dev, "Waiting for ACPI IPMI timeout");
+ acpi_dev_put(ipi_device);
+ }
+#endif
+
res = read_capabilities(resource);
if (res)
goto exit_free;