From: Zhang Rui <rui.zhang@intel.com>
To: Durgadoss R <durgadoss.r@intel.com>
Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
eduardo.valentin@ti.com, hongbo.zhang@linaro.org, wni@nvidia.com
Subject: Re: [PATCH 1/8] Thermal: Create sensor level APIs
Date: Fri, 08 Feb 2013 15:53:51 +0800 [thread overview]
Message-ID: <1360310031.2242.24.camel@rzhang1-mobl4> (raw)
In-Reply-To: <1360061183-14137-2-git-send-email-durgadoss.r@intel.com>
On Tue, 2013-02-05 at 16:16 +0530, Durgadoss R wrote:
> This patch creates sensor level APIs, in the
> generic thermal framework.
>
> A Thermal sensor is a piece of hardware that can report
> temperature of the spot in which it is placed. A thermal
> sensor driver reads the temperature from this sensor
> and reports it out. This kind of driver can be in
> any subsystem. If the sensor needs to participate
> in platform thermal management, the corresponding
> driver can use the APIs introduced in this patch, to
> register(or unregister) with the thermal framework.
>
> Signed-off-by: Durgadoss R <durgadoss.r@intel.com>
> ---
> drivers/thermal/thermal_sys.c | 280 +++++++++++++++++++++++++++++++++++++++++
> include/linux/thermal.h | 29 +++++
> 2 files changed, 309 insertions(+)
>
> diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
> index 0a1bf6b..cb94497 100644
> --- a/drivers/thermal/thermal_sys.c
> +++ b/drivers/thermal/thermal_sys.c
> @@ -44,13 +44,16 @@ MODULE_LICENSE("GPL");
>
> static DEFINE_IDR(thermal_tz_idr);
> static DEFINE_IDR(thermal_cdev_idr);
> +static DEFINE_IDR(thermal_sensor_idr);
> static DEFINE_MUTEX(thermal_idr_lock);
>
> static LIST_HEAD(thermal_tz_list);
> +static LIST_HEAD(thermal_sensor_list);
> static LIST_HEAD(thermal_cdev_list);
> static LIST_HEAD(thermal_governor_list);
>
> static DEFINE_MUTEX(thermal_list_lock);
> +static DEFINE_MUTEX(sensor_list_lock);
> static DEFINE_MUTEX(thermal_governor_lock);
>
> static struct thermal_governor *__find_governor(const char *name)
> @@ -423,6 +426,103 @@ static void thermal_zone_device_check(struct work_struct *work)
> #define to_thermal_zone(_dev) \
> container_of(_dev, struct thermal_zone_device, device)
>
> +#define to_thermal_sensor(_dev) \
> + container_of(_dev, struct thermal_sensor, device)
> +
> +static ssize_t
> +sensor_name_show(struct device *dev, struct device_attribute *attr, char *buf)
> +{
> + struct thermal_sensor *ts = to_thermal_sensor(dev);
> +
> + return sprintf(buf, "%s\n", ts->name);
> +}
> +
> +static ssize_t
> +sensor_temp_show(struct device *dev, struct device_attribute *attr, char *buf)
> +{
> + int ret;
> + long val;
> + struct thermal_sensor *ts = to_thermal_sensor(dev);
> +
> + ret = ts->ops->get_temp(ts, &val);
> +
> + return ret ? ret : sprintf(buf, "%ld\n", val);
> +}
> +
> +static ssize_t
> +hyst_show(struct device *dev, struct device_attribute *attr, char *buf)
> +{
> + int indx, ret;
> + long val;
> + struct thermal_sensor *ts = to_thermal_sensor(dev);
> +
> + if (!sscanf(attr->attr.name, "threshold%d_hyst", &indx))
> + return -EINVAL;
> +
> + ret = ts->ops->get_hyst(ts, indx, &val);
> +
> + return ret ? ret : sprintf(buf, "%ld\n", val);
> +}
> +
> +static ssize_t
> +hyst_store(struct device *dev, struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + int indx, ret;
> + long val;
> + struct thermal_sensor *ts = to_thermal_sensor(dev);
> +
> + if (!ts->ops->set_hyst)
> + return -EPERM;
> +
> + if (!sscanf(attr->attr.name, "threshold%d_hyst", &indx))
> + return -EINVAL;
> +
> + if (kstrtol(buf, 10, &val))
> + return -EINVAL;
> +
> + ret = ts->ops->set_hyst(ts, indx, val);
> +
> + return ret ? ret : count;
> +}
> +
> +static ssize_t
> +threshold_show(struct device *dev, struct device_attribute *attr, char *buf)
> +{
> + int indx, ret;
> + long val;
> + struct thermal_sensor *ts = to_thermal_sensor(dev);
> +
> + if (!sscanf(attr->attr.name, "threshold%d", &indx))
> + return -EINVAL;
> +
> + ret = ts->ops->get_threshold(ts, indx, &val);
> +
> + return ret ? ret : sprintf(buf, "%ld\n", val);
> +}
> +
> +static ssize_t
> +threshold_store(struct device *dev, struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + int indx, ret;
> + long val;
> + struct thermal_sensor *ts = to_thermal_sensor(dev);
> +
> + if (!ts->ops->set_threshold)
> + return -EPERM;
> +
> + if (!sscanf(attr->attr.name, "threshold%d", &indx))
> + return -EINVAL;
> +
> + if (kstrtol(buf, 10, &val))
> + return -EINVAL;
> +
> + ret = ts->ops->set_threshold(ts, indx, val);
> +
> + return ret ? ret : count;
> +}
> +
> static ssize_t
> type_show(struct device *dev, struct device_attribute *attr, char *buf)
> {
> @@ -707,6 +807,10 @@ static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
> static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store);
> static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store);
>
> +/* Thermal sensor attributes */
> +static DEVICE_ATTR(sensor_name, 0444, sensor_name_show, NULL);
> +static DEVICE_ATTR(temp_input, 0444, sensor_temp_show, NULL);
> +
> /* sys I/F for cooling device */
> #define to_cooling_device(_dev) \
> container_of(_dev, struct thermal_cooling_device, device)
> @@ -1493,6 +1597,182 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
> }
>
> /**
> + * enable_sensor_thresholds - create sysfs nodes for thresholdX
this is a little confusing.
I'd prefer
thermal_sensor_sysfs_add() and create sensor_name and temp_input
attribute in this function as well, and thermal_sensor_sysfs_remove()
to remove the sysfs I/F.
And further more, we can do this for thermal zones and cooling devices.
others look okay to me.
thanks,
rui
next prev parent reply other threads:[~2013-02-08 7:53 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-05 10:46 [PATCHv3 0/8] Thermal Framework Enhancements Durgadoss R
2013-02-05 10:46 ` [PATCH 1/8] Thermal: Create sensor level APIs Durgadoss R
2013-02-08 7:53 ` Zhang Rui [this message]
2013-02-08 8:26 ` R, Durgadoss
2013-02-08 9:54 ` Zhang Rui
2013-02-28 18:58 ` Eduardo Valentin
2013-03-01 5:08 ` R, Durgadoss
2013-02-05 10:46 ` [PATCH 2/8] Thermal: Create zone " Durgadoss R
2013-02-08 8:11 ` Zhang Rui
2013-02-08 8:54 ` R, Durgadoss
2013-02-08 9:54 ` Zhang Rui
2013-02-08 10:27 ` R, Durgadoss
2013-02-28 19:29 ` Eduardo Valentin
2013-03-01 15:31 ` R, Durgadoss
2013-02-05 10:46 ` [PATCH 3/8] Thermal: Add APIs to bind cdev to new zone structure Durgadoss R
2013-02-08 8:28 ` Zhang Rui
2013-02-28 19:35 ` Eduardo Valentin
2013-03-01 15:33 ` R, Durgadoss
2013-02-05 10:46 ` [PATCH 4/8] Thermal: Add trip point sysfs nodes for sensor Durgadoss R
2013-02-08 8:50 ` Zhang Rui
2013-02-28 19:51 ` Eduardo Valentin
2013-03-01 15:34 ` R, Durgadoss
2013-02-05 10:46 ` [PATCH 5/8] Thermal: Create Thermal map sysfs attributes for a zone Durgadoss R
2013-02-08 9:04 ` Zhang Rui
2013-02-08 9:08 ` R, Durgadoss
2013-02-08 9:55 ` Zhang Rui
2013-02-28 21:30 ` Eduardo Valentin
2013-02-05 10:46 ` [PATCH 6/8] Thermal: Add Documentation to new APIs Durgadoss R
2013-02-08 9:21 ` Zhang Rui
2013-02-05 10:46 ` [PATCH 7/8] Thermal: Add ABI Documentation for sysfs interfaces Durgadoss R
2013-02-05 10:46 ` [PATCH 8/8] Thermal: Dummy driver used for testing Durgadoss R
2013-02-08 7:53 ` [PATCHv3 0/8] Thermal Framework Enhancements Zhang Rui
2013-02-08 9:35 ` Zhang Rui
2013-02-28 21:33 ` Eduardo Valentin
2013-03-01 5:12 ` R, Durgadoss
2013-08-29 19:38 ` Eduardo Valentin
2013-08-30 9:20 ` R, Durgadoss
2013-08-30 12:34 ` Eduardo Valentin
2013-08-30 13:21 ` R, Durgadoss
-- strict thread matches above, loose matches on Subject: below --
2012-12-18 9:29 [PATCH " Durgadoss R
2012-12-18 9:29 ` [PATCH 1/8] Thermal: Create sensor level APIs Durgadoss R
2012-12-18 11:13 ` Joe Perches
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