diff options
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/armada_thermal.c | 122 |
1 files changed, 100 insertions, 22 deletions
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c index 4d1ede40654f..414329e94f8c 100644 --- a/drivers/thermal/armada_thermal.c +++ b/drivers/thermal/armada_thermal.c @@ -64,6 +64,7 @@ struct armada_thermal_data; /* Marvell EBU Thermal Sensor Dev Structure */ struct armada_thermal_priv { + struct device *dev; struct regmap *syscon; char zone_name[THERMAL_NAME_LENGTH]; struct armada_thermal_data *data; @@ -95,6 +96,26 @@ struct armada_thermal_data { unsigned int syscon_status_off; }; +struct armada_drvdata { + enum drvtype { + LEGACY, + SYSCON + } type; + union { + struct armada_thermal_priv *priv; + struct thermal_zone_device *tz; + } data; +}; + +/* + * struct armada_thermal_sensor - hold the information of one thermal sensor + * @thermal: pointer to the local private structure + * @tzd: pointer to the thermal zone device + */ +struct armada_thermal_sensor { + struct armada_thermal_priv *priv; +}; + static void armadaxp_init(struct platform_device *pdev, struct armada_thermal_priv *priv) { @@ -243,16 +264,14 @@ static bool armada_is_valid(struct armada_thermal_priv *priv) return reg & priv->data->is_valid_bit; } -static int armada_get_temp(struct thermal_zone_device *thermal, - int *temp) +static int armada_read_sensor(struct armada_thermal_priv *priv, int *temp) { - struct armada_thermal_priv *priv = thermal->devdata; u32 reg, div; s64 sample, b, m; /* Valid check */ if (priv->data->is_valid && !priv->data->is_valid(priv)) { - dev_err(&thermal->device, + dev_err(priv->dev, "Temperature sensor reading not valid\n"); return -EIO; } @@ -278,7 +297,32 @@ static int armada_get_temp(struct thermal_zone_device *thermal, return 0; } -static struct thermal_zone_device_ops ops = { +static int armada_get_temp_legacy(struct thermal_zone_device *thermal, + int *temp) +{ + struct armada_thermal_priv *priv = thermal->devdata; + int ret; + + /* Do the actual reading */ + ret = armada_read_sensor(priv, temp); + + return ret; +} + +static struct thermal_zone_device_ops legacy_ops = { + .get_temp = armada_get_temp_legacy, +}; + +static int armada_get_temp(void *_sensor, int *temp) +{ + struct armada_thermal_sensor *sensor = _sensor; + struct armada_thermal_priv *priv = sensor->priv; + + /* Do the actual reading */ + return armada_read_sensor(priv, temp); +} + +static struct thermal_zone_of_device_ops of_ops = { .get_temp = armada_get_temp, }; @@ -481,7 +525,9 @@ static void armada_set_sane_name(struct platform_device *pdev, static int armada_thermal_probe(struct platform_device *pdev) { - struct thermal_zone_device *thermal; + struct thermal_zone_device *tz; + struct armada_thermal_sensor *sensors; + struct armada_drvdata *drvdata; const struct of_device_id *match; struct armada_thermal_priv *priv; int ret; @@ -494,10 +540,12 @@ static int armada_thermal_probe(struct platform_device *pdev) if (!priv) return -ENOMEM; - priv->data = (struct armada_thermal_data *)match->data; + drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL); + if (!priv) + return -ENOMEM; - /* Ensure device name is correct for the thermal core */ - armada_set_sane_name(pdev, priv); + priv->dev = &pdev->dev; + priv->data = (struct armada_thermal_data *)match->data; /* * Legacy DT bindings only described "control1" register (also referred @@ -511,35 +559,65 @@ static int armada_thermal_probe(struct platform_device *pdev) * is to define an overall system controller and put the thermal node * into it, which requires the use of regmaps across all the driver. */ - if (IS_ERR(syscon_node_to_regmap(pdev->dev.parent->of_node))) + if (IS_ERR(syscon_node_to_regmap(pdev->dev.parent->of_node))) { + /* Ensure device name is correct for the thermal core */ + armada_set_sane_name(pdev, priv); + ret = armada_thermal_probe_legacy(pdev, priv); - else - ret = armada_thermal_probe_syscon(pdev, priv); + if (ret) + return ret; + priv->data->init(pdev, priv); + + tz = thermal_zone_device_register(priv->zone_name, 0, 0, priv, + &legacy_ops, NULL, 0, 0); + if (IS_ERR(tz)) { + dev_err(&pdev->dev, + "Failed to register thermal zone device\n"); + return PTR_ERR(tz); + } + + drvdata->type = LEGACY; + drvdata->data.tz = tz; + platform_set_drvdata(pdev, drvdata); + + return 0; + } + + ret = armada_thermal_probe_syscon(pdev, priv); if (ret) return ret; priv->data->init(pdev, priv); + drvdata->type = SYSCON; + drvdata->data.priv = priv; + platform_set_drvdata(pdev, drvdata); - thermal = thermal_zone_device_register(priv->zone_name, 0, 0, priv, - &ops, NULL, 0, 0); - if (IS_ERR(thermal)) { + sensors = devm_kzalloc(&pdev->dev, sizeof(struct armada_thermal_sensor), + GFP_KERNEL); + if (!sensors) + return -ENOMEM; + + sensors->priv = priv; + + tz = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, sensors, + &of_ops); + if (IS_ERR(tz)) { dev_err(&pdev->dev, - "Failed to register thermal zone device\n"); - return PTR_ERR(thermal); + "Failed to register thermal sensor (err: %ld)\n", + PTR_ERR(tz)); + return PTR_ERR(tz); } - platform_set_drvdata(pdev, thermal); - return 0; } static int armada_thermal_exit(struct platform_device *pdev) { - struct thermal_zone_device *armada_thermal = - platform_get_drvdata(pdev); + struct armada_drvdata *drvdata = platform_get_drvdata(pdev); - thermal_zone_device_unregister(armada_thermal); + if (drvdata->type == LEGACY) + thermal_zone_device_unregister(drvdata->data.tz); return 0; } |