@@ -12373,6 +12373,13 @@ S: Maintained
F: Documentation/devicetree/bindings/pinctrl/loongson,ls2k-pinctrl.yaml
F: drivers/pinctrl/pinctrl-loongson2.c
+LOONGSON-2 SOC SERIES THERMAL DRIVER
+M: zhanghongchen <zhanghongchen@loongson.cn>
+M: Yinbo Zhu <zhuyinbo@loongson.cn>
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: drivers/thermal/loongson2_thermal.c
+
LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI)
M: Sathya Prakash <sathya.prakash@broadcom.com>
M: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
@@ -510,4 +510,16 @@ config KHADAS_MCU_FAN_THERMAL
If you say yes here you get support for the FAN controlled
by the Microcontroller found on the Khadas VIM boards.
+config LOONGSON2_THERMAL
+ tristate "Loongson-2 SoC series thermal driver"
+ depends on LOONGARCH || COMPILE_TEST
+ depends on OF
+ help
+ Support for Thermal driver found on Loongson-2 SoC series platforms.
+ The thermal driver realizes get_temp and set_trips function, which
+ are used to obtain the temperature of the current node and set the
+ temperature range to trigger the interrupt. When the input temperature
+ is higher than the high temperature threshold or lower than the low
+ temperature threshold, the interrupt will occur.
+
endif
@@ -63,3 +63,4 @@ obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o
obj-$(CONFIG_AMLOGIC_THERMAL) += amlogic_thermal.o
obj-$(CONFIG_SPRD_THERMAL) += sprd_thermal.o
obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL) += khadas_mcu_fan.o
+obj-$(CONFIG_LOONGSON2_THERMAL) += loongson2_thermal.o
new file mode 100644
@@ -0,0 +1,169 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Author: zhanghongchen <zhanghongchen@loongson.cn>
+ * Yinbo Zhu <zhuyinbo@loongson.cn>
+ * Copyright (C) 2022-2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/minmax.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/thermal.h>
+#include <linux/units.h>
+#include "thermal_hwmon.h"
+
+#define LOONGSON2_MAX_SENSOR_SEL_NUM 3
+
+#define LOONGSON2_THSENS_CTRL_HI_REG 0x0
+#define LOONGSON2_THSENS_CTRL_LOW_REG 0x8
+#define LOONGSON2_THSENS_STATUS_REG 0x10
+#define LOONGSON2_THSENS_OUT_REG 0x14
+
+#define LOONGSON2_THSENS_INT_LO BIT(0)
+#define LOONGSON2_THSENS_INT_HIGH BIT(1)
+#define LOONGSON2_THSENS_OUT_MASK 0xFF
+
+struct loongson2_thermal_chip_data {
+ unsigned int thermal_sensor_sel;
+};
+
+struct loongson2_thermal_data {
+ void __iomem *regs;
+ const struct loongson2_thermal_chip_data *chip_data;
+};
+
+static int loongson2_thermal_set(struct loongson2_thermal_data *data,
+ int low, int high, bool enable)
+{
+ u64 reg_ctrl = 0;
+ int reg_off = data->chip_data->thermal_sensor_sel * 2;
+
+ low = clamp(-40, low, high);
+ high = clamp(125, low, high);
+
+ low += HECTO;
+ high += HECTO;
+
+ reg_ctrl = low;
+ reg_ctrl |= enable ? 0x100 : 0;
+ writew(reg_ctrl, data->regs + LOONGSON2_THSENS_CTRL_LOW_REG + reg_off);
+
+ reg_ctrl = high;
+ reg_ctrl |= enable ? 0x100 : 0;
+ writew(reg_ctrl, data->regs + LOONGSON2_THSENS_CTRL_HI_REG + reg_off);
+
+ return 0;
+}
+
+static int loongson2_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
+{
+ u32 reg_val;
+ struct loongson2_thermal_data *data = thermal_zone_device_priv(tz);
+
+ reg_val = readl(data->regs + LOONGSON2_THSENS_OUT_REG);
+ *temp = ((reg_val & LOONGSON2_THSENS_OUT_MASK) - HECTO) * KILO;
+
+ return 0;
+}
+
+static irqreturn_t loongson2_thermal_irq_thread(int irq, void *dev)
+{
+ struct thermal_zone_device *tzd = dev;
+ struct loongson2_thermal_data *data = thermal_zone_device_priv(tzd);
+
+ writeb(LOONGSON2_THSENS_INT_LO | LOONGSON2_THSENS_INT_HIGH, data->regs +
+ LOONGSON2_THSENS_STATUS_REG);
+
+ thermal_zone_device_update(tzd, THERMAL_EVENT_UNSPECIFIED);
+
+ return IRQ_HANDLED;
+}
+
+static int loongson2_thermal_set_trips(struct thermal_zone_device *tz, int low, int high)
+{
+ struct loongson2_thermal_data *data = thermal_zone_device_priv(tz);
+
+ return loongson2_thermal_set(data, low/MILLI, high/MILLI, true);
+}
+
+static const struct thermal_zone_device_ops loongson2_of_thermal_ops = {
+ .get_temp = loongson2_thermal_get_temp,
+ .set_trips = loongson2_thermal_set_trips,
+};
+
+static int loongson2_thermal_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct loongson2_thermal_data *data;
+ struct thermal_zone_device *tzd;
+ int ret, irq, i;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->chip_data = device_get_match_data(dev);
+
+ data->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(data->regs))
+ return PTR_ERR(data->regs);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ writeb(LOONGSON2_THSENS_INT_LO | LOONGSON2_THSENS_INT_HIGH, data->regs +
+ LOONGSON2_THSENS_STATUS_REG);
+
+ loongson2_thermal_set(data, 0, 0, false);
+
+ for (i = 0; i <= LOONGSON2_MAX_SENSOR_SEL_NUM; i++) {
+ tzd = devm_thermal_of_zone_register(dev, i, data,
+ &loongson2_of_thermal_ops);
+
+ if (!IS_ERR(tzd))
+ break;
+
+ if (PTR_ERR(tzd) != ENODEV)
+ continue;
+
+ return dev_err_probe(dev, PTR_ERR(tzd), "failed to register");
+ }
+
+ ret = devm_request_threaded_irq(dev, irq, NULL, loongson2_thermal_irq_thread,
+ IRQF_ONESHOT, "loongson2_thermal", tzd);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "failed to request alarm irq\n");
+
+ devm_thermal_add_hwmon_sysfs(dev, tzd);
+
+ return 0;
+}
+
+static const struct loongson2_thermal_chip_data loongson2_thermal_ls2k1000_data = {
+ .thermal_sensor_sel = 0,
+};
+
+static const struct of_device_id of_loongson2_thermal_match[] = {
+ {
+ .compatible = "loongson,ls2k1000-thermal",
+ .data = &loongson2_thermal_ls2k1000_data,
+ },
+ { /* end */ }
+};
+MODULE_DEVICE_TABLE(of, of_loongson2_thermal_match);
+
+static struct platform_driver loongson2_thermal_driver = {
+ .driver = {
+ .name = "loongson2_thermal",
+ .of_match_table = of_loongson2_thermal_match,
+ },
+ .probe = loongson2_thermal_probe,
+};
+module_platform_driver(loongson2_thermal_driver);
+
+MODULE_DESCRIPTION("Loongson2 thermal driver");
+MODULE_LICENSE("GPL");