From: Len Brown <lenb@kernel.org>
To: linux-acpi@vger.kernel.org, linux-pm@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org, Durgadoss R <dugardoss.r@intel.com>,
Durgadoss R <durgadoss.r@intel.com>,
Zhang Rui <rui.zhang@intel.com>, Len Brown <len.brown@intel.com>
Subject: [PATCH 50/52] Thermal: Make Thermal trip points writeable
Date: Tue, 24 Jul 2012 23:41:46 -0400 [thread overview]
Message-ID: <c56f5c0342dfee11a1a13d2f5bb7618de5b17590.1343187618.git.len.brown@intel.com> (raw)
In-Reply-To: <1343187708-19532-1-git-send-email-lenb@kernel.org>
In-Reply-To: <6af1c4fc5227af65092ebc848989693562bfa3e8.1343187617.git.len.brown@intel.com>
From: Durgadoss R <dugardoss.r@intel.com>
Some of the thermal drivers using the Generic Thermal Framework
require (all/some) trip points to be writeable. This patch makes
the trip point temperatures writeable on a per-trip point basis,
and modifies the required function call in thermal.c. This patch
also updates the Documentation to reflect the new change.
Signed-off-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
Documentation/thermal/sysfs-api.txt | 4 +-
drivers/acpi/thermal.c | 4 +-
drivers/platform/x86/acerhdf.c | 2 +-
drivers/platform/x86/intel_mid_thermal.c | 2 +-
drivers/thermal/spear_thermal.c | 2 +-
drivers/thermal/thermal_sys.c | 145 +++++++++++++++++++++----------
include/linux/thermal.h | 15 +++-
7 files changed, 121 insertions(+), 53 deletions(-)
diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt
index 1733ab9..4c10593 100644
--- a/Documentation/thermal/sysfs-api.txt
+++ b/Documentation/thermal/sysfs-api.txt
@@ -32,7 +32,8 @@ temperature) and throttle appropriate devices.
1.1 thermal zone device interface
1.1.1 struct thermal_zone_device *thermal_zone_device_register(char *name,
- int trips, void *devdata, struct thermal_zone_device_ops *ops)
+ int trips, int mask, void *devdata,
+ struct thermal_zone_device_ops *ops)
This interface function adds a new thermal zone device (sensor) to
/sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the
@@ -40,6 +41,7 @@ temperature) and throttle appropriate devices.
name: the thermal zone name.
trips: the total number of trip points this thermal zone supports.
+ mask: Bit string: If 'n'th bit is set, then trip point 'n' is writeable.
devdata: device private data
ops: thermal zone device call-backs.
.bind: bind the thermal zone device with a thermal cooling device.
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 7dbebea..2107d1b 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -845,7 +845,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
if (tz->trips.passive.flags.valid)
tz->thermal_zone =
- thermal_zone_device_register("acpitz", trips, tz,
+ thermal_zone_device_register("acpitz", trips, 0, tz,
&acpi_thermal_zone_ops,
tz->trips.passive.tc1,
tz->trips.passive.tc2,
@@ -853,7 +853,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
tz->polling_frequency*100);
else
tz->thermal_zone =
- thermal_zone_device_register("acpitz", trips, tz,
+ thermal_zone_device_register("acpitz", trips, 0, tz,
&acpi_thermal_zone_ops,
0, 0, 0,
tz->polling_frequency*100);
diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
index 2fd9d36..39abb15 100644
--- a/drivers/platform/x86/acerhdf.c
+++ b/drivers/platform/x86/acerhdf.c
@@ -660,7 +660,7 @@ static int acerhdf_register_thermal(void)
if (IS_ERR(cl_dev))
return -EINVAL;
- thz_dev = thermal_zone_device_register("acerhdf", 1, NULL,
+ thz_dev = thermal_zone_device_register("acerhdf", 1, 0, NULL,
&acerhdf_dev_ops, 0, 0, 0,
(kernelmode) ? interval*1000 : 0);
if (IS_ERR(thz_dev))
diff --git a/drivers/platform/x86/intel_mid_thermal.c b/drivers/platform/x86/intel_mid_thermal.c
index 5ae9cd9..2b2c212 100644
--- a/drivers/platform/x86/intel_mid_thermal.c
+++ b/drivers/platform/x86/intel_mid_thermal.c
@@ -499,7 +499,7 @@ static int mid_thermal_probe(struct platform_device *pdev)
goto err;
}
pinfo->tzd[i] = thermal_zone_device_register(name[i],
- 0, td_info, &tzd_ops, 0, 0, 0, 0);
+ 0, 0, td_info, &tzd_ops, 0, 0, 0, 0);
if (IS_ERR(pinfo->tzd[i])) {
kfree(td_info);
ret = PTR_ERR(pinfo->tzd[i]);
diff --git a/drivers/thermal/spear_thermal.c b/drivers/thermal/spear_thermal.c
index c2e32df..69a55d4 100644
--- a/drivers/thermal/spear_thermal.c
+++ b/drivers/thermal/spear_thermal.c
@@ -147,7 +147,7 @@ static int spear_thermal_probe(struct platform_device *pdev)
stdev->flags = pdata->thermal_flags;
writel_relaxed(stdev->flags, stdev->thermal_base);
- spear_thermal = thermal_zone_device_register("spear_thermal", 0,
+ spear_thermal = thermal_zone_device_register("spear_thermal", 0, 0,
stdev, &ops, 0, 0, 0, 0);
if (IS_ERR(spear_thermal)) {
dev_err(&pdev->dev, "thermal zone device is NULL\n");
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 022bacb..5feb335 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -196,6 +196,28 @@ trip_point_type_show(struct device *dev, struct device_attribute *attr,
}
static ssize_t
+trip_point_temp_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct thermal_zone_device *tz = to_thermal_zone(dev);
+ int trip, ret;
+ unsigned long temperature;
+
+ if (!tz->ops->set_trip_temp)
+ return -EPERM;
+
+ if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
+ return -EINVAL;
+
+ if (kstrtoul(buf, 10, &temperature))
+ return -EINVAL;
+
+ ret = tz->ops->set_trip_temp(tz, trip, temperature);
+
+ return ret ? ret : count;
+}
+
+static ssize_t
trip_point_temp_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -283,33 +305,6 @@ static DEVICE_ATTR(temp, 0444, temp_show, NULL);
static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store);
-static struct device_attribute trip_point_attrs[] = {
- __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL),
- __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL),
- __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL),
-};
-
/* sys I/F for cooling device */
#define to_cooling_device(_dev) \
container_of(_dev, struct thermal_cooling_device, device)
@@ -1089,9 +1084,81 @@ leave:
EXPORT_SYMBOL(thermal_zone_device_update);
/**
+ * create_trip_attrs - create attributes for trip points
+ * @tz: the thermal zone device
+ * @mask: Writeable trip point bitmap.
+ */
+static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
+{
+ int indx;
+
+ tz->trip_type_attrs =
+ kzalloc(sizeof(struct thermal_attr) * tz->trips, GFP_KERNEL);
+ if (!tz->trip_type_attrs)
+ return -ENOMEM;
+
+ tz->trip_temp_attrs =
+ kzalloc(sizeof(struct thermal_attr) * tz->trips, GFP_KERNEL);
+ if (!tz->trip_temp_attrs) {
+ kfree(tz->trip_type_attrs);
+ return -ENOMEM;
+ }
+
+ for (indx = 0; indx < tz->trips; indx++) {
+
+ /* create trip type attribute */
+ snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH,
+ "trip_point_%d_type", indx);
+
+ sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr);
+ tz->trip_type_attrs[indx].attr.attr.name =
+ tz->trip_type_attrs[indx].name;
+ tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO;
+ tz->trip_type_attrs[indx].attr.show = trip_point_type_show;
+
+ device_create_file(&tz->device,
+ &tz->trip_type_attrs[indx].attr);
+
+ /* create trip temp attribute */
+ snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH,
+ "trip_point_%d_temp", indx);
+
+ sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr);
+ tz->trip_temp_attrs[indx].attr.attr.name =
+ tz->trip_temp_attrs[indx].name;
+ tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO;
+ tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show;
+ if (mask & (1 << indx)) {
+ tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR;
+ tz->trip_temp_attrs[indx].attr.store =
+ trip_point_temp_store;
+ }
+
+ device_create_file(&tz->device,
+ &tz->trip_temp_attrs[indx].attr);
+ }
+ return 0;
+}
+
+static void remove_trip_attrs(struct thermal_zone_device *tz)
+{
+ int indx;
+
+ for (indx = 0; indx < tz->trips; indx++) {
+ device_remove_file(&tz->device,
+ &tz->trip_type_attrs[indx].attr);
+ device_remove_file(&tz->device,
+ &tz->trip_temp_attrs[indx].attr);
+ }
+ kfree(tz->trip_type_attrs);
+ kfree(tz->trip_temp_attrs);
+}
+
+/**
* thermal_zone_device_register - register a new thermal zone device
* @type: the thermal zone device type
* @trips: the number of trip points the thermal zone support
+ * @mask: a bit string indicating the writeablility of trip points
* @devdata: private device data
* @ops: standard thermal zone device callbacks
* @tc1: thermal coefficient 1 for passive calculations
@@ -1107,7 +1174,7 @@ EXPORT_SYMBOL(thermal_zone_device_update);
* section 11.1.5.1 of the ACPI specification 3.0.
*/
struct thermal_zone_device *thermal_zone_device_register(char *type,
- int trips, void *devdata,
+ int trips, int mask, void *devdata,
const struct thermal_zone_device_ops *ops,
int tc1, int tc2, int passive_delay, int polling_delay)
{
@@ -1121,7 +1188,7 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
if (strlen(type) >= THERMAL_NAME_LENGTH)
return ERR_PTR(-EINVAL);
- if (trips > THERMAL_MAX_TRIPS || trips < 0)
+ if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips)
return ERR_PTR(-EINVAL);
if (!ops || !ops->get_temp)
@@ -1175,15 +1242,11 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
goto unregister;
}
+ result = create_trip_attrs(tz, mask);
+ if (result)
+ goto unregister;
+
for (count = 0; count < trips; count++) {
- result = device_create_file(&tz->device,
- &trip_point_attrs[count * 2]);
- if (result)
- break;
- result = device_create_file(&tz->device,
- &trip_point_attrs[count * 2 + 1]);
- if (result)
- goto unregister;
tz->ops->get_trip_type(tz, count, &trip_type);
if (trip_type == THERMAL_TRIP_PASSIVE)
passive = 1;
@@ -1232,7 +1295,6 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
{
struct thermal_cooling_device *cdev;
struct thermal_zone_device *pos = NULL;
- int count;
if (!tz)
return;
@@ -1259,13 +1321,8 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
device_remove_file(&tz->device, &dev_attr_temp);
if (tz->ops->get_mode)
device_remove_file(&tz->device, &dev_attr_mode);
+ remove_trip_attrs(tz);
- for (count = 0; count < tz->trips; count++) {
- device_remove_file(&tz->device,
- &trip_point_attrs[count * 2]);
- device_remove_file(&tz->device,
- &trip_point_attrs[count * 2 + 1]);
- }
thermal_remove_hwmon_sysfs(tz);
release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
idr_destroy(&tz->idr);
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 796f1ff..6eaf914 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -58,6 +58,8 @@ struct thermal_zone_device_ops {
enum thermal_trip_type *);
int (*get_trip_temp) (struct thermal_zone_device *, int,
unsigned long *);
+ int (*set_trip_temp) (struct thermal_zone_device *, int,
+ unsigned long);
int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
int (*notify) (struct thermal_zone_device *, int,
enum thermal_trip_type);
@@ -85,10 +87,17 @@ struct thermal_cooling_device {
((long)t-2732+5)/10 : ((long)t-2732-5)/10)
#define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
+struct thermal_attr {
+ struct device_attribute attr;
+ char name[THERMAL_NAME_LENGTH];
+};
+
struct thermal_zone_device {
int id;
char type[THERMAL_NAME_LENGTH];
struct device device;
+ struct thermal_attr *trip_temp_attrs;
+ struct thermal_attr *trip_type_attrs;
void *devdata;
int trips;
int tc1;
@@ -137,9 +146,9 @@ enum {
};
#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
-struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
- const struct thermal_zone_device_ops *, int tc1, int tc2,
- int passive_freq, int polling_freq);
+struct thermal_zone_device *thermal_zone_device_register(char *, int, int,
+ void *, const struct thermal_zone_device_ops *, int tc1,
+ int tc2, int passive_freq, int polling_freq);
void thermal_zone_device_unregister(struct thermal_zone_device *);
int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
--
1.7.12.rc0
next prev parent reply other threads:[~2012-07-25 3:43 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-25 3:40 ACPI & Power Management Patches for Linux-3.6-merge - part 1 Len Brown
2012-07-25 3:40 ` [PATCH 01/52] ACPICA: AML Parser: Fix two possible memory leaks in error path Len Brown
2012-07-25 3:40 ` [PATCH 02/52] ACPICA: Object dump routines: Use common function for string output Len Brown
2012-07-25 3:40 ` [PATCH 03/52] ACPICA: Lint fixes for acpi_write, no functional changes Len Brown
2012-07-25 3:41 ` [PATCH 04/52] ACPICA: Add support for multiple notify handlers Len Brown
2012-07-25 3:41 ` [PATCH 05/52] ACPICA: Update to version 20120420 Len Brown
2012-07-25 3:41 ` [PATCH 06/52] ACPICA: Disassembler: Add support for Operation Region externals Len Brown
2012-07-25 3:41 ` [PATCH 07/52] ACPICA: ACPI 5/iASL: Add support for PCC keyword Len Brown
2012-07-25 3:41 ` [PATCH 08/52] ACPICA: iASL: Improved pathname support Len Brown
2012-07-25 3:41 ` [PATCH 09/52] ACPICA: Remove argument of acpi_os_wait_events_complete Len Brown
2012-07-25 3:41 ` [PATCH 10/52] ACPICA: Add FADT error message for GAS BitWidth overflow Len Brown
2012-07-25 3:41 ` [PATCH 11/52] ACPICA: Update to version 20120518 Len Brown
2012-07-25 3:41 ` [PATCH 12/52] cpuidle: remove unused hrtimer_peek_ahead_timers() call Len Brown
2012-07-25 3:41 ` [PATCH 13/52] cpuidle: add checks to avoid NULL pointer dereference Len Brown
2012-07-25 3:41 ` [PATCH 14/52] ACPI Battery: Added capacity Len Brown
2012-07-25 3:41 ` [PATCH 15/52] cpuidle: refactor out cpuidle_enter_state Len Brown
2012-07-25 3:41 ` [PATCH 16/52] cpuidle: fix error handling in __cpuidle_register_device Len Brown
2012-07-25 3:41 ` [PATCH 17/52] cpuidle: add support for states that affect multiple cpus Len Brown
2012-07-25 3:41 ` [PATCH 18/52] cpuidle: coupled: add parallel barrier function Len Brown
2012-07-25 3:41 ` [PATCH 19/52] drivers/thermal/spear_thermal.c: add Device Tree probing capability Len Brown
2012-07-25 3:41 ` [PATCH 20/52] ACPI: Add an interface to evaluate _OST Len Brown
2012-07-25 3:41 ` [PATCH 21/52] ACPI: Add _OST support for sysfs eject Len Brown
2012-07-25 3:41 ` [PATCH 22/52] ACPI: Add _OST support for ACPI CPU hotplug Len Brown
2012-07-25 3:41 ` [PATCH 23/52] ACPI: Add _OST support for ACPI memory hotplug Len Brown
2012-07-25 3:41 ` [PATCH 24/52] ACPI: Add _OST support for ACPI container hotplug Len Brown
2012-07-25 3:41 ` [PATCH 25/52] ACPI: Set hotplug _OST support bit to _OSC Len Brown
2012-07-25 3:41 ` [PATCH 26/52] ACPI, PM, Specify lowest allowed state for device sleep state Len Brown
2012-07-25 3:41 ` [PATCH 27/52] intel_idle: initial IVB support Len Brown
2012-07-25 3:41 ` [PATCH 28/52] ACPI: remove acpi_pad MAINTAINERS entry Len Brown
2012-07-25 3:41 ` [PATCH 29/52] ACPI: acpi_pad: rename "power_saving" thread to "acpi_pad" thread Len Brown
2012-07-25 3:41 ` [PATCH 31/52] ACPICA: Disassembler: Emit descriptions for ACPI predefined names Len Brown
2012-07-25 3:41 ` [PATCH 32/52] ACPICA: Utilities: conditionally compile backslash removal function Len Brown
2012-07-25 3:41 ` [PATCH 33/52] ACPICA: Update comments; no functional change Len Brown
2012-07-25 3:41 ` [PATCH 34/52] ACPICA: Add support for implicit notify on multiple devices Len Brown
2012-07-25 3:41 ` [PATCH 35/52] ACPICA: Update to version 20120620 Len Brown
2012-07-25 3:41 ` [PATCH 36/52] ACPI: acpi_pad: tune round_robin_time Len Brown
2012-07-25 3:41 ` [PATCH 37/52] ACPICA: Split exception code utilities to a new file, utexcep.c Len Brown
2012-07-25 3:41 ` [PATCH 38/52] ACPICA: Add new interfaces for BIOS(firmware) errors and warnings Len Brown
2012-07-25 3:41 ` [PATCH 39/52] ACPICA: Table manager: deploy new firmware error/warning interfaces Len Brown
2012-07-25 3:41 ` [PATCH 40/52] ACPICA: Fix some comment fields Len Brown
2012-07-25 3:41 ` [PATCH 41/52] ACPICA: Add PCC address space to space ID decode function Len Brown
2012-07-25 3:41 ` [PATCH 42/52] ACPICA: Split file: tbxface.c -> tbxfload.c Len Brown
2012-07-25 3:41 ` [PATCH 43/52] ACPICA: Add new ACPI table load/unload external interfaces Len Brown
2012-07-25 3:41 ` [PATCH 44/52] ACPICA: Update header files copyrights to 2012 Len Brown
2012-07-25 3:41 ` [PATCH 45/52] ACPICA: AcpiSrc: Fix some translation issues for Linux conversion Len Brown
2012-07-25 3:41 ` [PATCH 46/52] ACPICA: Update to version 20120711 Len Brown
2012-07-25 3:41 ` [PATCH 47/52] tools/power: turbostat v2 - re-write for efficiency Len Brown
2012-07-25 3:41 ` [PATCH 48/52] tools/power: turbostat: fix large c1% issue Len Brown
2012-07-25 13:03 ` Konrad Rzeszutek Wilk
2012-07-25 3:41 ` [PATCH 49/52] ACPI/AC: prevent OOPS on some boxes due to missing check power_supply_register() return value check Len Brown
2012-07-25 3:41 ` Len Brown [this message]
2012-07-25 11:13 ` [PATCH 50/52] Thermal: Make Thermal trip points writeable Rafael J. Wysocki
2012-07-25 11:15 ` [linux-pm] " R, Durgadoss
2012-07-25 3:41 ` [PATCH 51/52] Thermal: Add Hysteresis attributes Len Brown
2012-07-25 3:41 ` [PATCH 52/52] Thermal: Documentation update Len Brown
2012-07-25 6:47 ` [linux-pm] ACPI & Power Management Patches for Linux-3.6-merge - part 1 Amit Kachhap
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