forked from mirrors/linux
041e20ee60
Use new member visible of struct hwmon_ops to simplify specifying the static attribute visibility. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Message-ID: <d5d2570c-dfd9-4be5-ad9f-e721be477131@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Surface Fan driver for Surface System Aggregator Module. It provides access
|
|
* to the fan's rpm through the hwmon system.
|
|
*
|
|
* Copyright (C) 2023 Ivor Wanders <ivor@iwanders.net>
|
|
*/
|
|
|
|
#include <linux/hwmon.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/surface_aggregator/device.h>
|
|
#include <linux/types.h>
|
|
|
|
// SSAM
|
|
SSAM_DEFINE_SYNC_REQUEST_CL_R(__ssam_fan_rpm_get, __le16, {
|
|
.target_category = SSAM_SSH_TC_FAN,
|
|
.command_id = 0x01,
|
|
});
|
|
|
|
static int surface_fan_hwmon_read(struct device *dev,
|
|
enum hwmon_sensor_types type, u32 attr,
|
|
int channel, long *val)
|
|
{
|
|
struct ssam_device *sdev = dev_get_drvdata(dev);
|
|
int ret;
|
|
__le16 value;
|
|
|
|
ret = __ssam_fan_rpm_get(sdev, &value);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*val = le16_to_cpu(value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hwmon_channel_info *const surface_fan_info[] = {
|
|
HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT),
|
|
NULL
|
|
};
|
|
|
|
static const struct hwmon_ops surface_fan_hwmon_ops = {
|
|
.visible = 0444,
|
|
.read = surface_fan_hwmon_read,
|
|
};
|
|
|
|
static const struct hwmon_chip_info surface_fan_chip_info = {
|
|
.ops = &surface_fan_hwmon_ops,
|
|
.info = surface_fan_info,
|
|
};
|
|
|
|
static int surface_fan_probe(struct ssam_device *sdev)
|
|
{
|
|
struct device *hdev;
|
|
|
|
hdev = devm_hwmon_device_register_with_info(&sdev->dev,
|
|
"surface_fan", sdev,
|
|
&surface_fan_chip_info,
|
|
NULL);
|
|
|
|
return PTR_ERR_OR_ZERO(hdev);
|
|
}
|
|
|
|
static const struct ssam_device_id ssam_fan_match[] = {
|
|
{ SSAM_SDEV(FAN, SAM, 0x01, 0x01) },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(ssam, ssam_fan_match);
|
|
|
|
static struct ssam_device_driver surface_fan = {
|
|
.probe = surface_fan_probe,
|
|
.match_table = ssam_fan_match,
|
|
.driver = {
|
|
.name = "surface_fan",
|
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
|
},
|
|
};
|
|
module_ssam_device_driver(surface_fan);
|
|
|
|
MODULE_AUTHOR("Ivor Wanders <ivor@iwanders.net>");
|
|
MODULE_DESCRIPTION("Fan Driver for Surface System Aggregator Module");
|
|
MODULE_LICENSE("GPL");
|