Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 170 insertions, 0 deletions

diff --git a/drivers/platform/mips/cpu_hwmon.c b/drivers/platform/mips/cpu_hwmon.c
new file mode 100644
index 000000000..d8c5f9195
--- /dev/null
+++ b/drivers/platform/mips/cpu_hwmon.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/jiffies.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+
+#include <loongson.h>
+#include <boot_param.h>
+#include <loongson_hwmon.h>
+#include <loongson_regs.h>
+
+static int csr_temp_enable;
+
+/*
+ * Loongson-3 series cpu has two sensors inside,
+ * each of them from 0 to 255,
+ * if more than 127, that is dangerous.
+ * here only provide sensor1 data, because it always hot than sensor0
+ */
+int loongson3_cpu_temp(int cpu)
+{
+	u32 reg, prid_rev;
+
+	if (csr_temp_enable) {
+		reg = (csr_readl(LOONGSON_CSR_CPUTEMP) & 0xff);
+		goto out;
+	}
+
+	reg = LOONGSON_CHIPTEMP(cpu);
+	prid_rev = read_c0_prid() & PRID_REV_MASK;
+
+	switch (prid_rev) {
+	case PRID_REV_LOONGSON3A_R1:
+		reg = (reg >> 8) & 0xff;
+		break;
+	case PRID_REV_LOONGSON3B_R1:
+	case PRID_REV_LOONGSON3B_R2:
+	case PRID_REV_LOONGSON3A_R2_0:
+	case PRID_REV_LOONGSON3A_R2_1:
+		reg = ((reg >> 8) & 0xff) - 100;
+		break;
+	case PRID_REV_LOONGSON3A_R3_0:
+	case PRID_REV_LOONGSON3A_R3_1:
+	default:
+		reg = (reg & 0xffff) * 731 / 0x4000 - 273;
+		break;
+	}
+
+out:
+	return (int)reg * 1000;
+}
+
+static int nr_packages;
+static struct device *cpu_hwmon_dev;
+
+static ssize_t cpu_temp_label(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	int id = (to_sensor_dev_attr(attr))->index - 1;
+
+	return sprintf(buf, "CPU %d Temperature\n", id);
+}
+
+static ssize_t get_cpu_temp(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	int id = (to_sensor_dev_attr(attr))->index - 1;
+	int value = loongson3_cpu_temp(id);
+
+	return sprintf(buf, "%d\n", value);
+}
+
+static SENSOR_DEVICE_ATTR(temp1_input, 0444, get_cpu_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp1_label, 0444, cpu_temp_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp2_input, 0444, get_cpu_temp, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp2_label, 0444, cpu_temp_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp3_input, 0444, get_cpu_temp, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp3_label, 0444, cpu_temp_label, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp4_input, 0444, get_cpu_temp, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp4_label, 0444, cpu_temp_label, NULL, 4);
+
+static struct attribute *cpu_hwmon_attributes[] = {
+	&sensor_dev_attr_temp1_input.dev_attr.attr,
+	&sensor_dev_attr_temp1_label.dev_attr.attr,
+	&sensor_dev_attr_temp2_input.dev_attr.attr,
+	&sensor_dev_attr_temp2_label.dev_attr.attr,
+	&sensor_dev_attr_temp3_input.dev_attr.attr,
+	&sensor_dev_attr_temp3_label.dev_attr.attr,
+	&sensor_dev_attr_temp4_input.dev_attr.attr,
+	&sensor_dev_attr_temp4_label.dev_attr.attr,
+	NULL
+};
+
+static umode_t cpu_hwmon_is_visible(struct kobject *kobj,
+				    struct attribute *attr, int i)
+{
+	int id = i / 2;
+
+	if (id < nr_packages)
+		return attr->mode;
+	return 0;
+}
+
+static struct attribute_group cpu_hwmon_group = {
+	.attrs = cpu_hwmon_attributes,
+	.is_visible = cpu_hwmon_is_visible,
+};
+
+static const struct attribute_group *cpu_hwmon_groups[] = {
+	&cpu_hwmon_group,
+	NULL
+};
+
+#define CPU_THERMAL_THRESHOLD 90000
+static struct delayed_work thermal_work;
+
+static void do_thermal_timer(struct work_struct *work)
+{
+	int i, value;
+
+	for (i = 0; i < nr_packages; i++) {
+		value = loongson3_cpu_temp(i);
+		if (value > CPU_THERMAL_THRESHOLD) {
+			pr_emerg("Power off due to high temp: %d\n", value);
+			orderly_poweroff(true);
+		}
+	}
+
+	schedule_delayed_work(&thermal_work, msecs_to_jiffies(5000));
+}
+
+static int __init loongson_hwmon_init(void)
+{
+	pr_info("Loongson Hwmon Enter...\n");
+
+	if (cpu_has_csr())
+		csr_temp_enable = csr_readl(LOONGSON_CSR_FEATURES) &
+				  LOONGSON_CSRF_TEMP;
+
+	nr_packages = loongson_sysconf.nr_cpus /
+		loongson_sysconf.cores_per_package;
+
+	cpu_hwmon_dev = hwmon_device_register_with_groups(NULL, "cpu_hwmon",
+							  NULL, cpu_hwmon_groups);
+	if (IS_ERR(cpu_hwmon_dev)) {
+		pr_err("hwmon_device_register fail!\n");
+		return PTR_ERR(cpu_hwmon_dev);
+	}
+
+	INIT_DEFERRABLE_WORK(&thermal_work, do_thermal_timer);
+	schedule_delayed_work(&thermal_work, msecs_to_jiffies(20000));
+
+	return 0;
+}
+
+static void __exit loongson_hwmon_exit(void)
+{
+	cancel_delayed_work_sync(&thermal_work);
+	hwmon_device_unregister(cpu_hwmon_dev);
+}
+
+module_init(loongson_hwmon_init);
+module_exit(loongson_hwmon_exit);
+
+MODULE_AUTHOR("Yu Xiang <xiangy@lemote.com>");
+MODULE_AUTHOR("Huacai Chen <chenhc@lemote.com>");
+MODULE_DESCRIPTION("Loongson CPU Hwmon driver");
+MODULE_LICENSE("GPL");