[openwrt/openwrt] realtek: extend simple thermal driver to support rtl839x
LEDE Commits
lede-commits at lists.infradead.org
Tue Jun 3 02:14:56 PDT 2025
robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/cc5421128e44effd5df05227cec4d4c5d05be8dc
commit cc5421128e44effd5df05227cec4d4c5d05be8dc
Author: Stephen Howell <howels at allthatwemight.be>
AuthorDate: Sat May 17 12:06:10 2025 +0100
realtek: extend simple thermal driver to support rtl839x
* Extends SoC thermal sensor on rtl839x
* Tested on HP JG928A
Signed-off-by: Stephen Howell <howels at allthatwemight.be>
Link: https://github.com/openwrt/openwrt/pull/18825
Signed-off-by: Robert Marko <robimarko at gmail.com>
---
target/linux/realtek/dts/rtl839x.dtsi | 21 +++++++++++
.../files-6.6/drivers/thermal/realtek-thermal.c | 44 ++++++++++++++++++++++
.../330-add-realtek-thernal-driver.patch | 4 +-
target/linux/realtek/rtl839x/config-6.6 | 9 +++++
4 files changed, 76 insertions(+), 2 deletions(-)
diff --git a/target/linux/realtek/dts/rtl839x.dtsi b/target/linux/realtek/dts/rtl839x.dtsi
index 7fc5aea70c..84473fa2c3 100644
--- a/target/linux/realtek/dts/rtl839x.dtsi
+++ b/target/linux/realtek/dts/rtl839x.dtsi
@@ -272,6 +272,11 @@
pinctrl-names = "default";
pinctrl-0 = <&mdio_aux_mdx>;
};
+
+ soc_thermal: thermal {
+ compatible = "realtek,rtl8390-thermal";
+ #thermal-sensor-cells = <0>;
+ };
};
pinmux at 1b000004 {
@@ -343,4 +348,20 @@
interrupt-parent = <&intc>;
interrupts = <20 2>;
};
+
+ thermal_zones: thermal-zones {
+ cpu-thermal {
+ polling-delay-passive = <1000>;
+ polling-delay = <1000>;
+ coefficients = <1000 0>;
+ thermal-sensors = <&soc_thermal>;
+ trips {
+ cpu-crit {
+ temperature = <105000>;
+ hysteresis = <2000>;
+ type = "critical";
+ };
+ };
+ };
+ };
};
diff --git a/target/linux/realtek/files-6.6/drivers/thermal/realtek-thermal.c b/target/linux/realtek/files-6.6/drivers/thermal/realtek-thermal.c
index 242f11bd89..f91ddbccc0 100644
--- a/target/linux/realtek/files-6.6/drivers/thermal/realtek-thermal.c
+++ b/target/linux/realtek/files-6.6/drivers/thermal/realtek-thermal.c
@@ -20,6 +20,18 @@
#define RTL8380_TEMP_VALID BIT(8)
#define RTL8380_TEMP_OUT_MASK GENMASK(6, 0)
+#define RTL8390_THERMAL_METER0_CTRL0 0x274
+#define RTL8390_THERMAL_METER0_CTRL1 0x278
+#define RTL8390_THERMAL_METER0_CTRL2 0x27c
+#define RTL8390_THERMAL_METER0_RESULT 0x280
+#define RTL8390_THERMAL_METER1_CTRL0 0x284
+#define RTL8390_THERMAL_METER1_CTRL1 0x288
+#define RTL8390_THERMAL_METER1_CTRL2 0x28c
+#define RTL8390_THERMAL_METER1_RESULT 0x290
+#define RTL8390_TM_ENABLE BIT(0)
+#define RTL8390_TEMP_VALID BIT(8)
+#define RTL8390_TEMP_OUT_MASK GENMASK(6, 0)
+
#define RTL9300_THERMAL_METER_CTRL0 0x60
#define RTL9300_THERMAL_METER_CTRL1 0x64
#define RTL9300_THERMAL_METER_CTRL2 0x68
@@ -69,6 +81,37 @@ static const struct thermal_zone_device_ops rtl8380_ops = {
.get_temp = rtl8380_get_temp,
};
+static void rtl8390_thermal_init(struct realtek_thermal_priv *priv)
+{
+ priv->enabled = !regmap_update_bits(priv->regmap, RTL8390_THERMAL_METER0_CTRL0, RTL8390_TM_ENABLE, RTL8390_TM_ENABLE);
+}
+
+static int rtl8390_get_temp(struct thermal_zone_device *tz, int *res)
+{
+ struct realtek_thermal_priv *priv = thermal_zone_device_priv(tz);
+ int offset = thermal_zone_get_offset(tz);
+ int slope = thermal_zone_get_slope(tz);
+ u32 val;
+ int ret;
+
+ if (!priv->enabled)
+ rtl8390_thermal_init(priv);
+ /* assume sensor0 is the CPU, both sensor0 & sensor1 report same values +/- 1 degree C */
+ ret = regmap_read(priv->regmap, RTL8390_THERMAL_METER0_RESULT, &val);
+ if (ret)
+ return ret;
+
+ if (!(val & RTL8390_TEMP_VALID))
+ return -EAGAIN;
+
+ *res = FIELD_GET(RTL8390_TEMP_OUT_MASK, val) * slope + offset;
+ return 0;
+}
+
+static const struct thermal_zone_device_ops rtl8390_ops = {
+ .get_temp = rtl8390_get_temp,
+};
+
static void rtl9300_thermal_init(struct realtek_thermal_priv *priv)
{
/* increasing sample delay makes get_temp() succeed more often */
@@ -126,6 +169,7 @@ static int realtek_thermal_probe(struct platform_device *pdev)
static const struct of_device_id realtek_sensor_ids[] = {
{ .compatible = "realtek,rtl8380-thermal", .data = &rtl8380_ops, },
+ { .compatible = "realtek,rtl8390-thermal", .data = &rtl8390_ops, },
{ .compatible = "realtek,rtl9300-thermal", .data = &rtl9300_ops, },
{ /* sentinel */ }
};
diff --git a/target/linux/realtek/patches-6.6/330-add-realtek-thernal-driver.patch b/target/linux/realtek/patches-6.6/330-add-realtek-thernal-driver.patch
index 0c8d4ab3ab..af550a8c20 100644
--- a/target/linux/realtek/patches-6.6/330-add-realtek-thernal-driver.patch
+++ b/target/linux/realtek/patches-6.6/330-add-realtek-thernal-driver.patch
@@ -6,10 +6,10 @@
+config REALTEK_THERMAL
+ tristate "Realtek RTL838x and RTL930x thermal sensor support"
-+ depends on RTL838X || RTL930X || COMPILE_TEST
++ depends on RTL838X || RTL839X || RTL930X || COMPILE_TEST
+ depends on THERMAL_OF
+ help
-+ Support thermal sensor in Realtek RTL838x and RTL930x SoCs
++ Support thermal sensor in Realtek RTL838x, RTL839x and RTL930x SoCs
+
endif
--- a/drivers/thermal/Makefile
diff --git a/target/linux/realtek/rtl839x/config-6.6 b/target/linux/realtek/rtl839x/config-6.6
index 7ea9f707cb..f71be02906 100644
--- a/target/linux/realtek/rtl839x/config-6.6
+++ b/target/linux/realtek/rtl839x/config-6.6
@@ -218,6 +218,7 @@ CONFIG_REALTEK_OTTO_WDT=y
CONFIG_REALTEK_PHY=y
CONFIG_REALTEK_PHY_HWMON=y
CONFIG_REALTEK_SOC_PHY=y
+CONFIG_REALTEK_THERMAL=y
CONFIG_REGMAP=y
CONFIG_REGMAP_I2C=y
CONFIG_REGMAP_MDIO=y
@@ -254,6 +255,14 @@ CONFIG_SYS_SUPPORTS_MULTITHREADING=y
CONFIG_SYS_SUPPORTS_SCHED_SMT=y
CONFIG_SYS_SUPPORTS_SMP=y
CONFIG_TARGET_ISA_REV=2
+CONFIG_THERMAL=y
+CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE=y
+# CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE is not set
+# CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE is not set
+CONFIG_THERMAL_EMERGENCY_POWEROFF_DELAY_MS=0
+CONFIG_THERMAL_GOV_STEP_WISE=y
+CONFIG_THERMAL_HWMON=y
+CONFIG_THERMAL_OF=y
CONFIG_TICK_CPU_ACCOUNTING=y
CONFIG_TIMER_OF=y
CONFIG_TIMER_PROBE=y
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