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OpenCloudOS-Kernel
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Merge branch 'for-3.15/i2c-hid' into for-linus

This commit is contained in:
Jiri Kosina 2014-04-01 18:56:31 +02:00
parent ee5f68e6c2 34f439e4af
commit ba04a57b4a
1 changed files with 57 additions and 11 deletions
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68
drivers/hid/i2c-hid/i2c-hid.c
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@ -25,6 +25,7 @@
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/device.h>
#include <linux/wait.h>
#include <linux/err.h>
@ -454,10 +455,18 @@ static void i2c_hid_init_reports(struct hid_device *hid)
return;
}
/*
* The device must be powered on while we fetch initial reports
* from it.
*/
pm_runtime_get_sync(&client->dev);
list_for_each_entry(report,
&hid->report_enum[HID_FEATURE_REPORT].report_list, list)
i2c_hid_init_report(report, inbuf, ihid->bufsize);
pm_runtime_put(&client->dev);
kfree(inbuf);
}
@ -703,8 +712,8 @@ static int i2c_hid_open(struct hid_device *hid)
mutex_lock(&i2c_hid_open_mut);
if (!hid->open++) {
ret = i2c_hid_set_power(client, I2C_HID_PWR_ON);
if (ret) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
hid->open--;
goto done;
}
@ -712,7 +721,7 @@ static int i2c_hid_open(struct hid_device *hid)
}
done:
mutex_unlock(&i2c_hid_open_mut);
return ret;
return ret < 0 ? ret : 0;
}
static void i2c_hid_close(struct hid_device *hid)
@ -729,7 +738,7 @@ static void i2c_hid_close(struct hid_device *hid)
clear_bit(I2C_HID_STARTED, &ihid->flags);
/* Save some power */
i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
pm_runtime_put(&client->dev);
}
mutex_unlock(&i2c_hid_open_mut);
}
@ -738,19 +747,18 @@ static int i2c_hid_power(struct hid_device *hid, int lvl)
{
struct i2c_client *client = hid->driver_data;
struct i2c_hid *ihid = i2c_get_clientdata(client);
int ret = 0;
i2c_hid_dbg(ihid, "%s lvl:%d\n", __func__, lvl);
switch (lvl) {
case PM_HINT_FULLON:
ret = i2c_hid_set_power(client, I2C_HID_PWR_ON);
pm_runtime_get_sync(&client->dev);
break;
case PM_HINT_NORMAL:
ret = i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
pm_runtime_put(&client->dev);
break;
}
return ret;
return 0;
}
static struct hid_ll_driver i2c_hid_ll_driver = {
@ -987,13 +995,17 @@ static int i2c_hid_probe(struct i2c_client *client,
if (ret < 0)
goto err;
pm_runtime_get_noresume(&client->dev);
pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
ret = i2c_hid_fetch_hid_descriptor(ihid);
if (ret < 0)
goto err;
goto err_pm;
ret = i2c_hid_init_irq(client);
if (ret < 0)
goto err;
goto err_pm;
hid = hid_allocate_device();
if (IS_ERR(hid)) {
@ -1024,6 +1036,7 @@ static int i2c_hid_probe(struct i2c_client *client,
goto err_mem_free;
}
pm_runtime_put(&client->dev);
return 0;
err_mem_free:
@ -1032,6 +1045,10 @@ err_mem_free:
err_irq:
free_irq(client->irq, ihid);
err_pm:
pm_runtime_put_noidle(&client->dev);
pm_runtime_disable(&client->dev);
err:
i2c_hid_free_buffers(ihid);
kfree(ihid);
@ -1043,6 +1060,11 @@ static int i2c_hid_remove(struct i2c_client *client)
struct i2c_hid *ihid = i2c_get_clientdata(client);
struct hid_device *hid;
pm_runtime_get_sync(&client->dev);
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
pm_runtime_put_noidle(&client->dev);
hid = ihid->hid;
hid_destroy_device(hid);
@ -1088,7 +1110,31 @@ static int i2c_hid_resume(struct device *dev)
}
#endif
static SIMPLE_DEV_PM_OPS(i2c_hid_pm, i2c_hid_suspend, i2c_hid_resume);
#ifdef CONFIG_PM_RUNTIME
static int i2c_hid_runtime_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
disable_irq(client->irq);
return 0;
}
static int i2c_hid_runtime_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
enable_irq(client->irq);
i2c_hid_set_power(client, I2C_HID_PWR_ON);
return 0;
}
#endif
static const struct dev_pm_ops i2c_hid_pm = {
SET_SYSTEM_SLEEP_PM_OPS(i2c_hid_suspend, i2c_hid_resume)
SET_RUNTIME_PM_OPS(i2c_hid_runtime_suspend, i2c_hid_runtime_resume,
NULL)
};
static const struct i2c_device_id i2c_hid_id_table[] = {
{ "hid", 0 },