Subject: [PATCH] [acpi thermal] Add support for polling frequency

- Add tzp module parameter
- Add ->t_poll_freq to struct acpi_thermal
- Implement thermal_get_poll_freq()
- Call on device init

Signed-off-by: Patrick Mochel <mochel@linux.intel.com>

---

 drivers/acpi/drivers/thermal/device.c  |   11 +++++++++++
 drivers/acpi/drivers/thermal/driver.c  |   13 +++++++++++++
 drivers/acpi/drivers/thermal/thermal.h |    2 ++
 3 files changed, 26 insertions(+), 0 deletions(-)

applies-to: 692ce896c89f0a32e3f8254d2837e0613d97766d
abdaad09eb96cbfad61bd2b2aff296162e3e01e7
diff --git a/drivers/acpi/drivers/thermal/device.c b/drivers/acpi/drivers/thermal/device.c
index c95ac24..603c4af 100644
--- a/drivers/acpi/drivers/thermal/device.c
+++ b/drivers/acpi/drivers/thermal/device.c
@@ -188,3 +188,14 @@ int thermal_set_cooling_mode(struct acpi
 	dbg("Cooling mode set to [%s]", mode ? "passive" : "active");
 	return 0;
 }
+
+int thermal_get_poll_freq(struct acpi_thermal * at)
+{
+	int ret;
+
+	ret = get_int(at, "_TZP", &at->t_poll_freq);
+	if (!ret)
+		dbg("polling frequency is %lu dS", 
+		    at->t_poll_freq);
+	return ret;
+}
diff --git a/drivers/acpi/drivers/thermal/driver.c b/drivers/acpi/drivers/thermal/driver.c
index 50bc500..d5d57ef 100644
--- a/drivers/acpi/drivers/thermal/driver.c
+++ b/drivers/acpi/drivers/thermal/driver.c
@@ -14,6 +14,11 @@
 #include "thermal.h"
 
 
+static int tzp;
+module_param(tzp, int, 0);
+MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
+
+
 static int cooling_mode_init(struct acpi_thermal * at)
 {
 	int ret;
@@ -76,6 +81,14 @@ static int thermal_init(struct acpi_ther
 
 	cooling_mode_init(at);
 
+	/*
+	 * Set default polling frequency
+	 */
+	if (tzp)
+		at->t_poll_freq = tzp;
+	else
+		thermal_get_poll_freq(at);
+
 	return 0;
 }
 
diff --git a/drivers/acpi/drivers/thermal/thermal.h b/drivers/acpi/drivers/thermal/thermal.h
index 2ef4b5f..60f02e3 100644
--- a/drivers/acpi/drivers/thermal/thermal.h
+++ b/drivers/acpi/drivers/thermal/thermal.h
@@ -62,10 +62,12 @@ struct acpi_thermal {
 
 	struct thermal_trips	t_trips;
 	u32			t_cooling_mode;
+	unsigned long		t_poll_freq;
 };
 
 extern int thermal_get_temp(struct acpi_thermal *);
 extern int thermal_get_trips(struct acpi_thermal * at);
+extern int thermal_get_poll_freq(struct acpi_thermal *);
 
 extern int thermal_set_cooling_mode(struct acpi_thermal *, int);
 
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