diff options
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 77 |
1 files changed, 62 insertions, 15 deletions
diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c index 5a47cc8c8f85..9eec26dc0448 100644 --- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c +++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c @@ -31,6 +31,7 @@ #include <linux/cpufreq.h> #include <linux/cpumask.h> #include <linux/cpu_cooling.h> +#include <linux/of.h> #include "ti-thermal.h" #include "ti-bandgap.h" @@ -44,6 +45,7 @@ struct ti_thermal_data { enum thermal_device_mode mode; struct work_struct thermal_wq; int sensor_id; + bool our_zone; }; static void ti_thermal_work(struct work_struct *work) @@ -75,11 +77,10 @@ static inline int ti_thermal_hotspot_temperature(int t, int s, int c) /* thermal zone ops */ /* Get temperature callback function for thermal zone*/ -static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal, - unsigned long *temp) +static inline int __ti_thermal_get_temp(void *devdata, long *temp) { struct thermal_zone_device *pcb_tz = NULL; - struct ti_thermal_data *data = thermal->devdata; + struct ti_thermal_data *data = devdata; struct ti_bandgap *bgp; const struct ti_temp_sensor *s; int ret, tmp, slope, constant; @@ -118,6 +119,14 @@ static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal, return ret; } +static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal, + unsigned long *temp) +{ + struct ti_thermal_data *data = thermal->devdata; + + return __ti_thermal_get_temp(data, temp); +} + /* Bind callback functions for thermal zone */ static int ti_thermal_bind(struct thermal_zone_device *thermal, struct thermal_cooling_device *cdev) @@ -230,11 +239,9 @@ static int ti_thermal_get_trip_temp(struct thermal_zone_device *thermal, return 0; } -/* Get the temperature trend callback functions for thermal zone */ -static int ti_thermal_get_trend(struct thermal_zone_device *thermal, - int trip, enum thermal_trend *trend) +static int __ti_thermal_get_trend(void *p, long *trend) { - struct ti_thermal_data *data = thermal->devdata; + struct ti_thermal_data *data = p; struct ti_bandgap *bgp; int id, tr, ret = 0; @@ -245,6 +252,22 @@ static int ti_thermal_get_trend(struct thermal_zone_device *thermal, if (ret) return ret; + *trend = tr; + + return 0; +} + +/* Get the temperature trend callback functions for thermal zone */ +static int ti_thermal_get_trend(struct thermal_zone_device *thermal, + int trip, enum thermal_trend *trend) +{ + int ret; + long tr; + + ret = __ti_thermal_get_trend(thermal->devdata, &tr); + if (ret) + return ret; + if (tr > 0) *trend = THERMAL_TREND_RAISING; else if (tr < 0) @@ -308,16 +331,23 @@ int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id, if (!data) return -EINVAL; - /* Create thermal zone */ - data->ti_thermal = thermal_zone_device_register(domain, + /* in case this is specified by DT */ + data->ti_thermal = thermal_zone_of_sensor_register(bgp->dev, id, + data, __ti_thermal_get_temp, + __ti_thermal_get_trend); + if (IS_ERR(data->ti_thermal)) { + /* Create thermal zone */ + data->ti_thermal = thermal_zone_device_register(domain, OMAP_TRIP_NUMBER, 0, data, &ti_thermal_ops, NULL, FAST_TEMP_MONITORING_RATE, FAST_TEMP_MONITORING_RATE); - if (IS_ERR(data->ti_thermal)) { - dev_err(bgp->dev, "thermal zone device is NULL\n"); - return PTR_ERR(data->ti_thermal); + if (IS_ERR(data->ti_thermal)) { + dev_err(bgp->dev, "thermal zone device is NULL\n"); + return PTR_ERR(data->ti_thermal); + } + data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE; + data->our_zone = true; } - data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE; ti_bandgap_set_sensor_data(bgp, id, data); ti_bandgap_write_update_interval(bgp, data->sensor_id, data->ti_thermal->polling_delay); @@ -331,7 +361,13 @@ int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id) data = ti_bandgap_get_sensor_data(bgp, id); - thermal_zone_device_unregister(data->ti_thermal); + if (data && data->ti_thermal) { + if (data->our_zone) + thermal_zone_device_unregister(data->ti_thermal); + else + thermal_zone_of_sensor_unregister(bgp->dev, + data->ti_thermal); + } return 0; } @@ -350,6 +386,15 @@ int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id) int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id) { struct ti_thermal_data *data; + struct device_node *np = bgp->dev->of_node; + + /* + * We are assuming here that if one deploys the zone + * using DT, then it must be aware that the cooling device + * loading has to happen via cpufreq driver. + */ + if (of_find_property(np, "#thermal-sensor-cells", NULL)) + return 0; data = ti_bandgap_get_sensor_data(bgp, id); if (!data || IS_ERR(data)) @@ -380,7 +425,9 @@ int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id) struct ti_thermal_data *data; data = ti_bandgap_get_sensor_data(bgp, id); - cpufreq_cooling_unregister(data->cool_dev); + + if (data && data->cool_dev) + cpufreq_cooling_unregister(data->cool_dev); return 0; } |