target/linux/mediatek/patches/0018-thermal-of-always-set-sensor-related-callbacks.patch

   1 From 8c9c4ed500e92c10dc4965dcd00692b3102a328a Mon Sep 17 00:00:00 2001
   2 From: Sascha Hauer <s.hauer@pengutronix.de>
   3 Date: Wed, 13 May 2015 10:52:37 +0200
   4 Subject: [PATCH 18/76] thermal: of: always set sensor related callbacks
   5
   6 Now that the thermal core treats -ENOSYS like the callbacks were
   7 not present at all we no longer have to overwrite the ops during
   8 runtime but instead can always set them and return -ENOSYS if no
   9 sensor is registered.
  10
  11 Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
  12 ---
  13  drivers/thermal/of-thermal.c |   33 +++++++++++++--------------------
  14  1 file changed, 13 insertions(+), 20 deletions(-)
  15
  16 --- a/drivers/thermal/of-thermal.c
  17 +++ b/drivers/thermal/of-thermal.c
  18 @@ -91,7 +91,7 @@ static int of_thermal_get_temp(struct th
  19  {
  20         struct __thermal_zone *data = tz->devdata;
  21
  22 -       if (!data->ops->get_temp)
  23 +       if (!data->ops)
  24                 return -EINVAL;
  25
  26         return data->ops->get_temp(data->sensor_data, temp);
  27 @@ -178,7 +178,7 @@ static int of_thermal_set_emul_temp(stru
  28         struct __thermal_zone *data = tz->devdata;
  29
  30         if (!data->ops || !data->ops->set_emul_temp)
  31 -               return -EINVAL;
  32 +               return -ENOSYS;
  33
  34         return data->ops->set_emul_temp(data->sensor_data, temp);
  35  }
  36 @@ -189,8 +189,8 @@ static int of_thermal_get_trend(struct t
  37         struct __thermal_zone *data = tz->devdata;
  38         int r;
  39
  40 -       if (!data->ops->get_trend)
  41 -               return -EINVAL;
  42 +       if (!data->ops || !data->ops->get_trend)
  43 +               return -ENOSYS;
  44
  45         r = data->ops->get_trend(data->sensor_data, trip, trend);
  46         if (r)
  47 @@ -366,6 +366,10 @@ static int of_thermal_get_crit_temp(stru
  48  }
  49
  50  static struct thermal_zone_device_ops of_thermal_ops = {
  51 +       .get_temp = of_thermal_get_temp,
  52 +       .get_trend = of_thermal_get_trend,
  53 +       .set_emul_temp = of_thermal_set_emul_temp,
  54 +
  55         .get_mode = of_thermal_get_mode,
  56         .set_mode = of_thermal_set_mode,
  57
  58 @@ -399,13 +403,13 @@ thermal_zone_of_add_sensor(struct device
  59         if (!ops)
  60                 return ERR_PTR(-EINVAL);
  61
  62 +       if (!ops->get_temp)
  63 +               return ERR_PTR(-EINVAL);
  64 +
  65         mutex_lock(&tzd->lock);
  66         tz->ops = ops;
  67         tz->sensor_data = data;
  68
  69 -       tzd->ops->get_temp = of_thermal_get_temp;
  70 -       tzd->ops->get_trend = of_thermal_get_trend;
  71 -       tzd->ops->set_emul_temp = of_thermal_set_emul_temp;
  72         mutex_unlock(&tzd->lock);
  73
  74         return tzd;
  75 @@ -535,9 +539,6 @@ void thermal_zone_of_sensor_unregister(s
  76                 return;
  77
  78         mutex_lock(&tzd->lock);
  79 -       tzd->ops->get_temp = NULL;
  80 -       tzd->ops->get_trend = NULL;
  81 -       tzd->ops->set_emul_temp = NULL;
  82
  83         tz->ops = NULL;
  84         tz->sensor_data = NULL;
  85 @@ -845,7 +846,6 @@ int __init of_parse_thermal_zones(void)
  86  {
  87         struct device_node *np, *child;
  88         struct __thermal_zone *tz;
  89 -       struct thermal_zone_device_ops *ops;
  90
  91         np = of_find_node_by_name(NULL, "thermal-zones");
  92         if (!np) {
  93 @@ -869,29 +869,22 @@ int __init of_parse_thermal_zones(void)
  94                         continue;
  95                 }
  96
  97 -               ops = kmemdup(&of_thermal_ops, sizeof(*ops), GFP_KERNEL);
  98 -               if (!ops)
  99 -                       goto exit_free;
 100 -
 101                 tzp = kzalloc(sizeof(*tzp), GFP_KERNEL);
 102 -               if (!tzp) {
 103 -                       kfree(ops);
 104 +               if (!tzp)
 105                         goto exit_free;
 106 -               }
 107
 108                 /* No hwmon because there might be hwmon drivers registering */
 109                 tzp->no_hwmon = true;
 110
 111                 zone = thermal_zone_device_register(child->name, tz->ntrips,
 112                                                     0, tz,
 113 -                                                   ops, tzp,
 114 +                                                   &of_thermal_ops, tzp,
 115                                                     tz->passive_delay,
 116                                                     tz->polling_delay);
 117                 if (IS_ERR(zone)) {
 118                         pr_err("Failed to build %s zone %ld\n", child->name,
 119                                PTR_ERR(zone));
 120                         kfree(tzp);
 121 -                       kfree(ops);
 122                         of_thermal_free_zone(tz);
 123                         /* attempting to build remaining zones still */
 124                 }