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path: root/drivers/acpi/fan_attr.c
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Diffstat (limited to 'drivers/acpi/fan_attr.c')
-rw-r--r--drivers/acpi/fan_attr.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/acpi/fan_attr.c b/drivers/acpi/fan_attr.c
new file mode 100644
index 000000000000..7b109022108b
--- /dev/null
+++ b/drivers/acpi/fan_attr.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * fan_attr.c - Create extra attributes for ACPI Fan driver
+ *
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ * Copyright (C) 2022 Intel Corporation. All rights reserved.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+
+#include "fan.h"
+
+MODULE_LICENSE("GPL");
+
+static ssize_t show_state(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct acpi_fan_fps *fps = container_of(attr, struct acpi_fan_fps, dev_attr);
+ int count;
+
+ if (fps->control == 0xFFFFFFFF || fps->control > 100)
+ count = scnprintf(buf, PAGE_SIZE, "not-defined:");
+ else
+ count = scnprintf(buf, PAGE_SIZE, "%lld:", fps->control);
+
+ if (fps->trip_point == 0xFFFFFFFF || fps->trip_point > 9)
+ count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined:");
+ else
+ count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld:", fps->trip_point);
+
+ if (fps->speed == 0xFFFFFFFF)
+ count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined:");
+ else
+ count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld:", fps->speed);
+
+ if (fps->noise_level == 0xFFFFFFFF)
+ count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined:");
+ else
+ count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld:", fps->noise_level * 100);
+
+ if (fps->power == 0xFFFFFFFF)
+ count += scnprintf(&buf[count], PAGE_SIZE - count, "not-defined\n");
+ else
+ count += scnprintf(&buf[count], PAGE_SIZE - count, "%lld\n", fps->power);
+
+ return count;
+}
+
+int acpi_fan_create_attributes(struct acpi_device *device)
+{
+ struct acpi_fan *fan = acpi_driver_data(device);
+ int i, status = 0;
+
+ for (i = 0; i < fan->fps_count; ++i) {
+ struct acpi_fan_fps *fps = &fan->fps[i];
+
+ snprintf(fps->name, ACPI_FPS_NAME_LEN, "state%d", i);
+ sysfs_attr_init(&fps->dev_attr.attr);
+ fps->dev_attr.show = show_state;
+ fps->dev_attr.store = NULL;
+ fps->dev_attr.attr.name = fps->name;
+ fps->dev_attr.attr.mode = 0444;
+ status = sysfs_create_file(&device->dev.kobj, &fps->dev_attr.attr);
+ if (status) {
+ int j;
+
+ for (j = 0; j < i; ++j)
+ sysfs_remove_file(&device->dev.kobj, &fan->fps[j].dev_attr.attr);
+ break;
+ }
+ }
+
+ return status;
+}
+
+void acpi_fan_delete_attributes(struct acpi_device *device)
+{
+ struct acpi_fan *fan = acpi_driver_data(device);
+ int i;
+
+ for (i = 0; i < fan->fps_count; ++i)
+ sysfs_remove_file(&device->dev.kobj, &fan->fps[i].dev_attr.attr);
+}