diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/nct1008.c | 118 |
1 files changed, 117 insertions, 1 deletions
diff --git a/drivers/misc/nct1008.c b/drivers/misc/nct1008.c index f5287142252f..cd42102f432a 100644 --- a/drivers/misc/nct1008.c +++ b/drivers/misc/nct1008.c @@ -32,6 +32,7 @@ #include <linux/nct1008.h> #include <linux/delay.h> #include <linux/regulator/consumer.h> +#include <linux/thermal.h> #define DRIVER_NAME "nct1008" @@ -96,6 +97,9 @@ struct nct1008_data { u8 limits_sz; void (*alarm_fn)(bool raised); struct regulator *nct_reg; +#ifdef CONFIG_TEGRA_THERMAL_SYSFS + struct thermal_zone_device *thz; +#endif }; static inline s8 value_to_temperature(bool extended, u8 value) @@ -604,6 +608,9 @@ static int nct1008_enable_alert(struct nct1008_data *data) return ret; } +/* The thermal sysfs handles notifying the throttling + * cooling device */ +#ifndef CONFIG_TEGRA_THERMAL_SYSFS static bool throttle_enb; static void therm_throttle(struct nct1008_data *data, bool enable) { @@ -620,6 +627,12 @@ static void therm_throttle(struct nct1008_data *data, bool enable) mutex_unlock(&data->mutex); } } +#endif + +/* Thermal sysfs handles hysteresis */ +#ifndef CONFIG_TEGRA_THERMAL_SYSFS + #define ALERT_HYSTERESIS_THROTTLE 1 +#endif #define ALERT_HYSTERESIS_THROTTLE 1 #define ALERT_HYSTERESIS_EDP 3 @@ -666,6 +679,9 @@ static void nct1008_work_func(struct work_struct *work) } hysteresis = ALERT_HYSTERESIS_EDP; + +/* Thermal sysfs handles hysteresis */ +#ifndef CONFIG_TEGRA_THERMAL_SYSFS throttling_ext_limit_milli = CELSIUS_TO_MILLICELSIUS(data->plat_data.throttling_ext_limit); @@ -679,11 +695,13 @@ static void nct1008_work_func(struct work_struct *work) /* switch off throttling */ therm_throttle(data, false); } +#endif if (temp_milli < CELSIUS_TO_MILLICELSIUS(data->limits[0])) { lo_limit = 0; hi_limit = data->limits[0]; - } else if (temp_milli >= CELSIUS_TO_MILLICELSIUS(data->limits[nentries-1])) { + } else if (temp_milli >= + CELSIUS_TO_MILLICELSIUS(data->limits[nentries-1])) { lo_limit = data->limits[nentries-1] - hysteresis; hi_limit = data->plat_data.shutdown_ext_limit; } else { @@ -740,6 +758,13 @@ static void nct1008_work_func(struct work_struct *work) edp_thermal_zone_val = temp_milli; +#ifdef CONFIG_TEGRA_THERMAL_SYSFS + if (data->thz) { + if (!data->thz->passive) + thermal_zone_device_update(data->thz); + } +#endif + out: nct1008_enable_alert(data); @@ -971,6 +996,66 @@ static unsigned int get_ext_mode_delay_ms(unsigned int conv_rate) } } +#ifdef CONFIG_TEGRA_THERMAL_SYSFS + +static int nct1008_thermal_zone_bind(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdevice) { + /* Support only Thermal Throttling (1 trip) for now */ + return thermal_zone_bind_cooling_device(thermal, 0, cdevice); +} + +static int nct1008_thermal_zone_unbind(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdevice) { + /* Support only Thermal Throttling (1 trip) for now */ + return thermal_zone_unbind_cooling_device(thermal, 0, cdevice); +} + +static int nct1008_thermal_zone_get_temp(struct thermal_zone_device *thermal, + long *temp) +{ + struct nct1008_data *data = thermal->devdata; + + return nct1008_get_temp(&data->client->dev, temp); +} + +static int nct1008_thermal_zone_get_trip_type( + struct thermal_zone_device *thermal, + int trip, + enum thermal_trip_type *type) { + + /* Support only Thermal Throttling (1 trip) for now */ + if (trip != 0) + return -EINVAL; + + *type = THERMAL_TRIP_PASSIVE; + + return 0; +} + +static int nct1008_thermal_zone_get_trip_temp( + struct thermal_zone_device *thermal, + int trip, + long *temp) { + struct nct1008_data *data = thermal->devdata; + + /* Support only Thermal Throttling (1 trip) for now */ + if (trip != 0) + return -EINVAL; + + *temp = CELSIUS_TO_MILLICELSIUS(data->plat_data.throttling_ext_limit); + + return 0; +} + +static struct thermal_zone_device_ops nct1008_thermal_zone_ops = { + .bind = nct1008_thermal_zone_bind, + .unbind = nct1008_thermal_zone_unbind, + .get_temp = nct1008_thermal_zone_get_temp, + .get_trip_type = nct1008_thermal_zone_get_trip_type, + .get_trip_temp = nct1008_thermal_zone_get_trip_temp, +}; +#endif + /* * Manufacturer(OnSemi) recommended sequence for * Extended Range mode is as follows @@ -994,6 +1079,9 @@ static int __devinit nct1008_probe(struct i2c_client *client, int err; long temp_milli; unsigned int delay; +#ifdef CONFIG_TEGRA_THERMAL_SYSFS + struct thermal_zone_device *thz; +#endif data = kzalloc(sizeof(struct nct1008_data), GFP_KERNEL); @@ -1051,6 +1139,26 @@ static int __devinit nct1008_probe(struct i2c_client *client, } tegra_edp_update_thermal_zone(MILLICELSIUS_TO_CELSIUS(temp_milli)); + +#ifdef CONFIG_TEGRA_THERMAL_SYSFS + thz = thermal_zone_device_register("nct1008", + 1, /* trips */ + data, + &nct1008_thermal_zone_ops, + 1, /* tc1 */ + 5, /* tc2 */ + 2000, /* passive delay */ + 0); /* polling delay */ + + if (IS_ERR(thz)) { + data->thz = NULL; + err = -ENODEV; + goto error; + } + + data->thz = thz; +#endif + return 0; error: @@ -1068,6 +1176,14 @@ static int __devexit nct1008_remove(struct i2c_client *client) if (data->dent) debugfs_remove(data->dent); + +#ifdef CONFIG_TEGRA_THERMAL_SYSFS + if (data->thz) { + thermal_zone_device_unregister(data->thz); + data->thz = NULL; + } +#endif + free_irq(data->client->irq, data); cancel_work_sync(&data->work); sysfs_remove_group(&client->dev.kobj, &nct1008_attr_group); |