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Subject[PATCH 2/3] thermal/drivers/devfreq_cooling: Use device name instead of auto-numbering
Date
Currently the naming of a cooling device is just a cooling technique
followed by a number. When there are multiple cooling devices using
the same technique, it is impossible to clearly identify the related
device as this one is just a number.

For instance:

thermal-devfreq-0
thermal-devfreq-1
etc ...

The 'thermal' prefix is redundant with the subsystem namespace. This
patch removes the 'thermal prefix and changes the number by the device
name. So the naming above becomes:

devfreq-5000000.gpu
devfreq-1d84000.ufshc
etc ...

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/thermal/devfreq_cooling.c | 21 ++++-----------------
1 file changed, 4 insertions(+), 17 deletions(-)

diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c
index fed3121ff2a1..62abcffeb422 100644
--- a/drivers/thermal/devfreq_cooling.c
+++ b/drivers/thermal/devfreq_cooling.c
@@ -25,11 +25,8 @@
#define HZ_PER_KHZ 1000
#define SCALE_ERROR_MITIGATION 100

-static DEFINE_IDA(devfreq_ida);
-
/**
* struct devfreq_cooling_device - Devfreq cooling device
- * @id: unique integer value corresponding to each
* devfreq_cooling_device registered.
* @cdev: Pointer to associated thermal cooling device.
* @devfreq: Pointer to associated devfreq device.
@@ -51,7 +48,6 @@ static DEFINE_IDA(devfreq_ida);
* @em_pd: Energy Model for the associated Devfreq device
*/
struct devfreq_cooling_device {
- int id;
struct thermal_cooling_device *cdev;
struct devfreq *devfreq;
unsigned long cooling_state;
@@ -363,7 +359,7 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
struct thermal_cooling_device *cdev;
struct device *dev = df->dev.parent;
struct devfreq_cooling_device *dfc;
- char dev_name[THERMAL_NAME_LENGTH];
+ char name[THERMAL_NAME_LENGTH];
int err, num_opps;

dfc = kzalloc(sizeof(*dfc), GFP_KERNEL);
@@ -407,30 +403,22 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
if (err < 0)
goto free_table;

- err = ida_simple_get(&devfreq_ida, 0, 0, GFP_KERNEL);
- if (err < 0)
- goto remove_qos_req;
-
- dfc->id = err;
-
- snprintf(dev_name, sizeof(dev_name), "thermal-devfreq-%d", dfc->id);
+ snprintf(name, sizeof(name), "devfreq-%s", dev_name(dev));

- cdev = thermal_of_cooling_device_register(np, dev_name, dfc,
+ cdev = thermal_of_cooling_device_register(np, name, dfc,
&devfreq_cooling_ops);
if (IS_ERR(cdev)) {
err = PTR_ERR(cdev);
dev_err(dev,
"Failed to register devfreq cooling device (%d)\n",
err);
- goto release_ida;
+ goto remove_qos_req;
}

dfc->cdev = cdev;

return cdev;

-release_ida:
- ida_simple_remove(&devfreq_ida, dfc->id);
remove_qos_req:
dev_pm_qos_remove_request(&dfc->req_max_freq);
free_table:
@@ -527,7 +515,6 @@ void devfreq_cooling_unregister(struct thermal_cooling_device *cdev)
dev = dfc->devfreq->dev.parent;

thermal_cooling_device_unregister(dfc->cdev);
- ida_simple_remove(&devfreq_ida, dfc->id);
dev_pm_qos_remove_request(&dfc->req_max_freq);

em_dev_unregister_perf_domain(dev);
--
2.17.1
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