Thermal: int3400 thermal: register to thermal framework

Signed-off-by: Zhang Rui <rui.zhang@intel.com>

2 files changed, 104 insertions, 0 deletions

diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 6f5a87a8f19f..b34c5f54fc83 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -237,6 +237,7 @@ config INTEL_SOC_DTS_THERMAL
 config INT340X_THERMAL
         tristate "ACPI INT340X thermal drivers"
         depends on X86 && ACPI
+        select THERMAL_GOV_USER_SPACE
         help
           Newer laptops and tablets that use ACPI may have thermal sensors and
           other devices with thermal control capabilities outside the core
diff --git a/drivers/thermal/int340x_thermal/int3400_thermal.c b/drivers/thermal/int340x_thermal/int3400_thermal.c
index 65c63ba8b314..9104b4f9381b 100644
--- a/drivers/thermal/int340x_thermal/int3400_thermal.c
+++ b/drivers/thermal/int340x_thermal/int3400_thermal.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/acpi.h>
+#include <linux/thermal.h>
 
 struct art {
         acpi_handle source;
@@ -60,6 +61,8 @@ static u8 *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
 
 struct int3400_thermal_priv {
         struct acpi_device *adev;
+        struct thermal_zone_device *thermal;
+        int mode;
         int art_count;
         struct art *arts;
         int trt_count;
@@ -114,6 +117,36 @@ end:
         return result;
 }
 
+static int int3400_thermal_run_osc(acpi_handle handle,
+                                enum int3400_thermal_uuid uuid, bool enable)
+{
+        u32 ret, buf[2];
+        acpi_status status;
+        int result = 0;
+        struct acpi_osc_context context = {
+                .uuid_str = int3400_thermal_uuids[uuid],
+                .rev = 1,
+                .cap.length = 8,
+        };
+
+        buf[OSC_QUERY_DWORD] = 0;
+        buf[OSC_SUPPORT_DWORD] = enable;
+
+        context.cap.pointer = buf;
+
+        status = acpi_run_osc(handle, &context);
+        if (ACPI_SUCCESS(status)) {
+                ret = *((u32 *)(context.ret.pointer + 4));
+                if (ret != enable)
+                        result = -EPERM;
+        } else
+                result = -EPERM;
+
+        kfree(context.ret.pointer);
+        return result;
+}
+
+
 static int parse_art(struct int3400_thermal_priv *priv)
 {
         acpi_handle handle = priv->adev->handle;
@@ -243,6 +276,61 @@ end:
         return result;
 }
 
+static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,
+                        unsigned long *temp)
+{
+        *temp = 20 * 1000; /* faked temp sensor with 20C */
+        return 0;
+}
+
+static int int3400_thermal_get_mode(struct thermal_zone_device *thermal,
+                                enum thermal_device_mode *mode)
+{
+        struct int3400_thermal_priv *priv = thermal->devdata;
+
+        if (!priv)
+                return -EINVAL;
+
+        *mode = priv->mode;
+
+        return 0;
+}
+
+static int int3400_thermal_set_mode(struct thermal_zone_device *thermal,
+                                enum thermal_device_mode mode)
+{
+        struct int3400_thermal_priv *priv = thermal->devdata;
+        bool enable;
+        int result = 0;
+
+        if (!priv)
+                return -EINVAL;
+
+        if (mode == THERMAL_DEVICE_ENABLED)
+                enable = true;
+        else if (mode == THERMAL_DEVICE_DISABLED)
+                enable = false;
+        else
+                return -EINVAL;
+
+        if (enable != priv->mode) {
+                priv->mode = enable;
+                /* currently, only PASSIVE COOLING is supported */
+                result = int3400_thermal_run_osc(priv->adev->handle,
+                                        INT3400_THERMAL_PASSIVE_1, enable);
+        }
+        return result;
+}
+
+static struct thermal_zone_device_ops int3400_thermal_ops = {
+        .get_temp = int3400_thermal_get_temp,
+};
+
+static struct thermal_zone_params int3400_thermal_params = {
+        .governor_name = "user_space",
+        .no_hwmon = true,
+};
+
 static int int3400_thermal_probe(struct platform_device *pdev)
 {
         struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
@@ -272,7 +360,21 @@ static int int3400_thermal_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, priv);
 
+        if (priv->uuid_bitmap & 1 << INT3400_THERMAL_PASSIVE_1) {
+                int3400_thermal_ops.get_mode = int3400_thermal_get_mode;
+                int3400_thermal_ops.set_mode = int3400_thermal_set_mode;
+        }
+        priv->thermal = thermal_zone_device_register("INT3400 Thermal", 0, 0,
+                                                priv, &int3400_thermal_ops,
+                                                &int3400_thermal_params, 0, 0);
+        if (IS_ERR(priv->thermal)) {
+                result = PTR_ERR(priv->thermal);
+                goto free_trt;
+        }
+
         return 0;
+free_trt:
+        kfree(priv->trts);
 free_art:
         kfree(priv->arts);
 free_priv:
@@ -284,6 +386,7 @@ static int int3400_thermal_remove(struct platform_device *pdev)
 {
         struct int3400_thermal_priv *priv = platform_get_drvdata(pdev);
 
+        thermal_zone_device_unregister(priv->thermal);
         kfree(priv->trts);
         kfree(priv->arts);
         kfree(priv);