diff options
| author | Lin Fuzhen <fuzhen.lin@freescale.com> | 2011-11-17 19:00:02 +0800 |
|---|---|---|
| committer | Lin Fuzhen <fuzhen.lin@freescale.com> | 2011-12-08 00:03:20 +0800 |
| commit | ca4c4be73dd2a1e407d8f810a1121c877ba635b0 (patch) | |
| tree | 6f3bb1e25e465553d8feac8e756f15cbc807ac7a | |
| parent | a7e4dbdebf366d036865ec9121cd236f15894201 (diff) | |
ENGR00162493-1 mag3110: register the mag3110 as earlysuspend device
When screen off, let mag3110 entry in suspend to save some power
Signed-off-by: Lin Fuzhen <fuzhen.lin@freescale.com>
| -rwxr-xr-x | drivers/hwmon/mag3110.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/drivers/hwmon/mag3110.c b/drivers/hwmon/mag3110.c index a0be33e309d3..22cb12910fe2 100755 --- a/drivers/hwmon/mag3110.c +++ b/drivers/hwmon/mag3110.c @@ -30,6 +30,7 @@ #include <linux/input.h> #include <linux/wait.h> #include <linux/workqueue.h> +#include <linux/earlysuspend.h> #define MAG3110_DRV_NAME "mag3110" #define MAG3110_ID 0xC4 @@ -471,6 +472,39 @@ static int mag3110_resume(struct i2c_client *client) #define mag3110_resume NULL #endif /* CONFIG_PM */ +#ifdef CONFIG_HAS_EARLYSUSPEND +static void mag3110_early_suspend(struct early_suspend *h) +{ + struct i2c_client *client; + pm_message_t state = { .event = PM_EVENT_SUSPEND }; + + if (!mag3110_pdata) + return -EINVAL; + + client = mag3110_pdata->client; + mag3110_suspend(client, state); + dev_info(&client->dev, "mag3110 early_syspend\n"); +} + +static void mag3110_later_resume(struct early_suspend *h) +{ + struct i2c_client *client; + + if (!mag3110_pdata) + return -EINVAL; + + client = mag3110_pdata->client; + mag3110_resume(client); + dev_info(&client->dev, "mag3110 late_resume\n"); +} + +struct early_suspend mag3110_earlysuspend = { + .level = EARLY_SUSPEND_LEVEL_DISABLE_FB, + .suspend = mag3110_early_suspend, + .resume = mag3110_later_resume, +}; +#endif + static const struct i2c_device_id mag3110_id[] = { {MAG3110_DRV_NAME, 0}, {} @@ -480,8 +514,10 @@ MODULE_DEVICE_TABLE(i2c, mag3110_id); static struct i2c_driver mag3110_driver = { .driver = {.name = MAG3110_DRV_NAME, .owner = THIS_MODULE,}, +#ifndef CONFIG_HAS_EARLYSUSPEND .suspend = mag3110_suspend, .resume = mag3110_resume, +#endif .probe = mag3110_probe, .remove = __devexit_p(mag3110_remove), .shutdown = mag3110_shutdown, @@ -490,11 +526,20 @@ static struct i2c_driver mag3110_driver = { static int __init mag3110_init(void) { - return i2c_add_driver(&mag3110_driver); + int ret; + ret = i2c_add_driver(&mag3110_driver); +#ifdef CONFIG_HAS_EARLYSUSPEND + if (!ret) + register_early_suspend(&mag3110_earlysuspend); +#endif + return ret; } static void __exit mag3110_exit(void) { +#ifdef CONFIG_HAS_EARLYSUSPEND + unregister_early_suspend(&mag3110_earlysuspend); +#endif i2c_del_driver(&mag3110_driver); } |