diff options
Diffstat (limited to 'drivers/thermal/thermal_sys.c')
| -rw-r--r-- | drivers/thermal/thermal_sys.c | 122 |
1 files changed, 92 insertions, 30 deletions
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 8c8ce806180..5b7863a03f9 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -32,7 +32,6 @@ #include <linux/kdev_t.h> #include <linux/idr.h> #include <linux/thermal.h> -#include <linux/spinlock.h> #include <linux/reboot.h> #include <net/netlink.h> #include <net/genetlink.h> @@ -132,23 +131,16 @@ EXPORT_SYMBOL_GPL(thermal_unregister_governor); static int get_idr(struct idr *idr, struct mutex *lock, int *id) { - int err; - -again: - if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) - return -ENOMEM; + int ret; if (lock) mutex_lock(lock); - err = idr_get_new(idr, NULL, id); + ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); if (lock) mutex_unlock(lock); - if (unlikely(err == -EAGAIN)) - goto again; - else if (unlikely(err)) - return err; - - *id = *id & MAX_IDR_MASK; + if (unlikely(ret < 0)) + return ret; + *id = ret; return 0; } @@ -355,8 +347,9 @@ static void handle_critical_trips(struct thermal_zone_device *tz, tz->ops->notify(tz, trip, trip_type); if (trip_type == THERMAL_TRIP_CRITICAL) { - pr_emerg("Critical temperature reached(%d C),shutting down\n", - tz->temperature / 1000); + dev_emerg(&tz->device, + "critical temperature reached(%d C),shutting down\n", + tz->temperature / 1000); orderly_poweroff(true); } } @@ -378,23 +371,57 @@ static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) monitor_thermal_zone(tz); } +static int thermal_zone_get_temp(struct thermal_zone_device *tz, + unsigned long *temp) +{ + int ret = 0; +#ifdef CONFIG_THERMAL_EMULATION + int count; + unsigned long crit_temp = -1UL; + enum thermal_trip_type type; +#endif + + mutex_lock(&tz->lock); + + ret = tz->ops->get_temp(tz, temp); +#ifdef CONFIG_THERMAL_EMULATION + if (!tz->emul_temperature) + goto skip_emul; + + for (count = 0; count < tz->trips; count++) { + ret = tz->ops->get_trip_type(tz, count, &type); + if (!ret && type == THERMAL_TRIP_CRITICAL) { + ret = tz->ops->get_trip_temp(tz, count, &crit_temp); + break; + } + } + + if (ret) + goto skip_emul; + + if (*temp < crit_temp) + *temp = tz->emul_temperature; +skip_emul: +#endif + mutex_unlock(&tz->lock); + return ret; +} + static void update_temperature(struct thermal_zone_device *tz) { long temp; int ret; - mutex_lock(&tz->lock); - - ret = tz->ops->get_temp(tz, &temp); + ret = thermal_zone_get_temp(tz, &temp); if (ret) { - pr_warn("failed to read out thermal zone %d\n", tz->id); - goto exit; + dev_warn(&tz->device, "failed to read out thermal zone %d\n", + tz->id); + return; } + mutex_lock(&tz->lock); tz->last_temperature = tz->temperature; tz->temperature = temp; - -exit: mutex_unlock(&tz->lock); } @@ -437,10 +464,7 @@ temp_show(struct device *dev, struct device_attribute *attr, char *buf) long temperature; int ret; - if (!tz->ops->get_temp) - return -EPERM; - - ret = tz->ops->get_temp(tz, &temperature); + ret = thermal_zone_get_temp(tz, &temperature); if (ret) return ret; @@ -700,6 +724,31 @@ policy_show(struct device *dev, struct device_attribute *devattr, char *buf) return sprintf(buf, "%s\n", tz->governor->name); } +#ifdef CONFIG_THERMAL_EMULATION +static ssize_t +emul_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 ret = 0; + unsigned long temperature; + + if (kstrtoul(buf, 10, &temperature)) + return -EINVAL; + + if (!tz->ops->set_emul_temp) { + mutex_lock(&tz->lock); + tz->emul_temperature = temperature; + mutex_unlock(&tz->lock); + } else { + ret = tz->ops->set_emul_temp(tz, temperature); + } + + return ret ? ret : count; +} +static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); +#endif/*CONFIG_THERMAL_EMULATION*/ + static DEVICE_ATTR(type, 0444, type_show, NULL); static DEVICE_ATTR(temp, 0444, temp_show, NULL); static DEVICE_ATTR(mode, 0644, mode_show, mode_store); @@ -842,7 +891,7 @@ temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) temp_input); struct thermal_zone_device *tz = temp->tz; - ret = tz->ops->get_temp(tz, &temperature); + ret = thermal_zone_get_temp(tz, &temperature); if (ret) return ret; @@ -1529,6 +1578,9 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, if (!ops || !ops->get_temp) return ERR_PTR(-EINVAL); + if (trips > 0 && !ops->get_trip_type) + return ERR_PTR(-EINVAL); + tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); if (!tz) return ERR_PTR(-ENOMEM); @@ -1592,6 +1644,11 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, goto unregister; } +#ifdef CONFIG_THERMAL_EMULATION + result = device_create_file(&tz->device, &dev_attr_emul_temp); + if (result) + goto unregister; +#endif /* Create policy attribute */ result = device_create_file(&tz->device, &dev_attr_policy); if (result) @@ -1711,7 +1768,8 @@ static struct genl_multicast_group thermal_event_mcgrp = { .name = THERMAL_GENL_MCAST_GROUP_NAME, }; -int thermal_generate_netlink_event(u32 orig, enum events event) +int thermal_generate_netlink_event(struct thermal_zone_device *tz, + enum events event) { struct sk_buff *skb; struct nlattr *attr; @@ -1721,6 +1779,9 @@ int thermal_generate_netlink_event(u32 orig, enum events event) int result; static unsigned int thermal_event_seqnum; + if (!tz) + return -EINVAL; + /* allocate memory */ size = nla_total_size(sizeof(struct thermal_genl_event)) + nla_total_size(0); @@ -1755,7 +1816,7 @@ int thermal_generate_netlink_event(u32 orig, enum events event) memset(thermal_event, 0, sizeof(struct thermal_genl_event)); - thermal_event->orig = orig; + thermal_event->orig = tz->id; thermal_event->event = event; /* send multicast genetlink message */ @@ -1767,7 +1828,7 @@ int thermal_generate_netlink_event(u32 orig, enum events event) result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); if (result) - pr_info("failed to send netlink event:%d\n", result); + dev_err(&tz->device, "Failed to send netlink event:%d", result); return result; } @@ -1807,6 +1868,7 @@ static int __init thermal_init(void) idr_destroy(&thermal_cdev_idr); mutex_destroy(&thermal_idr_lock); mutex_destroy(&thermal_list_lock); + return result; } result = genetlink_init(); return result; |