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linux/debian/patches/patchset-xanmod/valve/0002-hwmon-Add-driver-for-Steam-Deck-s-EC-sensors.patch

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2024-12-10 00:17:37 +03:00
From 8fe7bb2680d3e1201fdf3329e51078831f32fe12 Mon Sep 17 00:00:00 2001
From: Andrey Smirnov <andrew.smirnov@gmail.com>
Date: Sat, 19 Feb 2022 16:09:45 -0800
Subject: [PATCH 2/6] hwmon: Add driver for Steam Deck's EC sensors
Add driver for sensors exposed by EC firmware on Steam Deck hardware.
(cherry picked from commit 6917aac77bee6185ae3920b936cdbe7876118c0b)
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Signed-off-by: Alexandre Frade <kernel@xanmod.org>
---
drivers/hwmon/Kconfig | 11 ++
drivers/hwmon/Makefile | 1 +
drivers/hwmon/steamdeck-hwmon.c | 224 ++++++++++++++++++++++++++++++++
3 files changed, 236 insertions(+)
create mode 100644 drivers/hwmon/steamdeck-hwmon.c
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
2024-12-10 00:17:37 +03:00
@@ -2053,6 +2053,17 @@ config SENSORS_SCH5636
This driver can also be built as a module. If so, the module
will be called sch5636.
+config SENSORS_STEAMDECK
+ tristate "Steam Deck EC sensors"
+ depends on MFD_STEAMDECK
+ help
+ If you say yes here you get support for the hardware
+ monitoring features exposed by EC firmware on Steam Deck
+ devices
+
+ This driver can also be built as a module. If so, the module
+ will be called steamdeck-hwmon.
+
config SENSORS_STTS751
tristate "ST Microelectronics STTS751"
depends on I2C
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
2024-12-10 00:17:37 +03:00
@@ -208,6 +208,7 @@ obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47
obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
obj-$(CONFIG_SENSORS_SPARX5) += sparx5-temp.o
obj-$(CONFIG_SENSORS_SPD5118) += spd5118.o
+obj-$(CONFIG_SENSORS_STEAMDECK) += steamdeck-hwmon.o
obj-$(CONFIG_SENSORS_STTS751) += stts751.o
obj-$(CONFIG_SENSORS_SURFACE_FAN)+= surface_fan.o
2024-12-10 00:17:37 +03:00
obj-$(CONFIG_SENSORS_SURFACE_TEMP)+= surface_temp.o
--- /dev/null
+++ b/drivers/hwmon/steamdeck-hwmon.c
@@ -0,0 +1,224 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Steam Deck EC sensors driver
+ *
+ * Copyright (C) 2021-2022 Valve Corporation
+ */
+
+#include <linux/acpi.h>
+#include <linux/hwmon.h>
+#include <linux/platform_device.h>
+
+#define STEAMDECK_HWMON_NAME "steamdeck-hwmon"
+
+struct steamdeck_hwmon {
+ struct acpi_device *adev;
+};
+
+static long
+steamdeck_hwmon_get(struct steamdeck_hwmon *sd, const char *method)
+{
+ unsigned long long val;
+ if (ACPI_FAILURE(acpi_evaluate_integer(sd->adev->handle,
+ (char *)method, NULL, &val)))
+ return -EIO;
+
+ return val;
+}
+
+static int
+steamdeck_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *out)
+{
+ struct steamdeck_hwmon *sd = dev_get_drvdata(dev);
+
+ switch (type) {
+ case hwmon_curr:
+ if (attr != hwmon_curr_input)
+ return -EOPNOTSUPP;
+
+ *out = steamdeck_hwmon_get(sd, "PDAM");
+ if (*out < 0)
+ return *out;
+ break;
+ case hwmon_in:
+ if (attr != hwmon_in_input)
+ return -EOPNOTSUPP;
+
+ *out = steamdeck_hwmon_get(sd, "PDVL");
+ if (*out < 0)
+ return *out;
+ break;
+ case hwmon_temp:
+ if (attr != hwmon_temp_input)
+ return -EOPNOTSUPP;
+
+ *out = steamdeck_hwmon_get(sd, "BATT");
+ if (*out < 0)
+ return *out;
+ /*
+ * Assuming BATT returns deg C we need to mutiply it
+ * by 1000 to convert to mC
+ */
+ *out *= 1000;
+ break;
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_input:
+ *out = steamdeck_hwmon_get(sd, "FANR");
+ if (*out < 0)
+ return *out;
+ break;
+ case hwmon_fan_target:
+ *out = steamdeck_hwmon_get(sd, "FSSR");
+ if (*out < 0)
+ return *out;
+ break;
+ case hwmon_fan_fault:
+ *out = steamdeck_hwmon_get(sd, "FANC");
+ if (*out < 0)
+ return *out;
+ /*
+ * FANC (Fan check):
+ * 0: Abnormal
+ * 1: Normal
+ */
+ *out = !*out;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int
+steamdeck_hwmon_read_string(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, const char **str)
+{
+ switch (type) {
+ /*
+ * These two aren't, strictly speaking, measured. EC
+ * firmware just reports what PD negotiation resulted
+ * in.
+ */
+ case hwmon_curr:
+ *str = "PD Contract Current";
+ break;
+ case hwmon_in:
+ *str = "PD Contract Voltage";
+ break;
+ case hwmon_temp:
+ *str = "Battery Temp";
+ break;
+ case hwmon_fan:
+ *str = "System Fan";
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int
+steamdeck_hwmon_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long val)
+{
+ struct steamdeck_hwmon *sd = dev_get_drvdata(dev);
+
+ if (type != hwmon_fan ||
+ attr != hwmon_fan_target)
+ return -EOPNOTSUPP;
+
+ val = clamp_val(val, 0, 7300);
+
+ if (ACPI_FAILURE(acpi_execute_simple_method(sd->adev->handle,
+ "FANS", val)))
+ return -EIO;
+
+ return 0;
+}
+
+static umode_t
+steamdeck_hwmon_is_visible(const void *data, enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ if (type == hwmon_fan &&
+ attr == hwmon_fan_target)
+ return 0644;
+
+ return 0444;
+}
+
+static const struct hwmon_channel_info *steamdeck_hwmon_info[] = {
+ HWMON_CHANNEL_INFO(in,
+ HWMON_I_INPUT | HWMON_I_LABEL),
+ HWMON_CHANNEL_INFO(curr,
+ HWMON_C_INPUT | HWMON_C_LABEL),
+ HWMON_CHANNEL_INFO(temp,
+ HWMON_T_INPUT | HWMON_T_LABEL),
+ HWMON_CHANNEL_INFO(fan,
+ HWMON_F_INPUT | HWMON_F_LABEL |
+ HWMON_F_TARGET | HWMON_F_FAULT),
+ NULL
+};
+
+static const struct hwmon_ops steamdeck_hwmon_ops = {
+ .is_visible = steamdeck_hwmon_is_visible,
+ .read = steamdeck_hwmon_read,
+ .read_string = steamdeck_hwmon_read_string,
+ .write = steamdeck_hwmon_write,
+};
+
+static const struct hwmon_chip_info steamdeck_hwmon_chip_info = {
+ .ops = &steamdeck_hwmon_ops,
+ .info = steamdeck_hwmon_info,
+};
+
+static int steamdeck_hwmon_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct steamdeck_hwmon *sd;
+ struct device *hwmon;
+
+ sd = devm_kzalloc(dev, sizeof(*sd), GFP_KERNEL);
+ if (!sd)
+ return -ENOMEM;
+
+ sd->adev = ACPI_COMPANION(dev->parent);
+ hwmon = devm_hwmon_device_register_with_info(dev,
+ "steamdeck_hwmon",
+ sd,
+ &steamdeck_hwmon_chip_info,
+ NULL);
+ if (IS_ERR(hwmon)) {
+ dev_err(dev, "Failed to register HWMON device");
+ return PTR_ERR(hwmon);
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id steamdeck_hwmon_id_table[] = {
+ { .name = STEAMDECK_HWMON_NAME },
+ {}
+};
+MODULE_DEVICE_TABLE(platform, steamdeck_hwmon_id_table);
+
+static struct platform_driver steamdeck_hwmon_driver = {
+ .probe = steamdeck_hwmon_probe,
+ .driver = {
+ .name = STEAMDECK_HWMON_NAME,
+ },
+ .id_table = steamdeck_hwmon_id_table,
+};
+module_platform_driver(steamdeck_hwmon_driver);
+
+MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
+MODULE_DESCRIPTION("Steam Deck EC sensors driver");
+MODULE_LICENSE("GPL");