thermal: rcar: enable to use thermal-zone on DT

This patch enables to use thermal-zone on DT if it was calles as
"renesas,rcar-thermal-gen2".
Previous style (= non thermal-zone) is still supported by
"renesas,rcar-thermal" to keep compatibility for "git bisect".

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

diff --git a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
index 332e625..e5ee3f1 100644 (file)
--- a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
+++ b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
@@ -1,8 +1,9 @@
 * Renesas R-Car Thermal
 
 Required properties:
-- compatible           : "renesas,thermal-<soctype>", "renesas,rcar-thermal"
-                         as fallback.
+- compatible           : "renesas,thermal-<soctype>",
+                          "renesas,rcar-gen2-thermal" (with thermal-zone) or
+                          "renesas,rcar-thermal" (without thermal-zone) as fallback.
                          Examples with soctypes are:
                            - "renesas,thermal-r8a73a4" (R-Mobile APE6)
                            - "renesas,thermal-r8a7779" (R-Car H1)
@@ -36,3 +37,35 @@ thermal@e61f0000 {
                0xe61f0300 0x38>;
        interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>;
 };
+
+Example (with thermal-zone):
+
+thermal-zones {
+       cpu_thermal: cpu-thermal {
+               polling-delay-passive   = <1000>;
+               polling-delay           = <5000>;
+
+               thermal-sensors = <&thermal>;
+
+               trips {
+                       cpu-crit {
+                               temperature     = <115000>;
+                               hysteresis      = <0>;
+                               type            = "critical";
+                       };
+               };
+               cooling-maps {
+               };
+       };
+};
+
+thermal: thermal@e61f0000 {
+       compatible =    "renesas,thermal-r8a7790",
+                       "renesas,rcar-gen2-thermal",
+                       "renesas,rcar-thermal";
+       reg = <0 0xe61f0000 0 0x14>, <0 0xe61f0100 0 0x38>;
+       interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>;
+       clocks = <&mstp5_clks R8A7790_CLK_THERMAL>;
+       power-domains = <&cpg_clocks>;
+       #thermal-sensor-cells = <0>;
+};

diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
index 44b9c48..0e735ac 100644 (file)
--- a/drivers/thermal/rcar_thermal.c
+++ b/drivers/thermal/rcar_thermal.c
@@ -23,6 +23,7 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/reboot.h>
@@ -75,8 +76,10 @@ struct rcar_thermal_priv {
 #define rcar_has_irq_support(priv)     ((priv)->common->base)
 #define rcar_id_to_shift(priv)         ((priv)->id * 8)
 
+#define USE_OF_THERMAL 1
 static const struct of_device_id rcar_thermal_dt_ids[] = {
        { .compatible = "renesas,rcar-thermal", },
+       { .compatible = "renesas,rcar-gen2-thermal", .data = (void *)USE_OF_THERMAL },
        {},
 };
 MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids);
@@ -200,9 +203,9 @@ err_out_unlock:
        return ret;
 }
 
-static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
+static int rcar_thermal_get_current_temp(struct rcar_thermal_priv *priv,
+                                        int *temp)
 {
-       struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
        int tmp;
        int ret;
 
@@ -226,6 +229,20 @@ static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
        return 0;
 }
 
+static int rcar_thermal_of_get_temp(void *data, int *temp)
+{
+       struct rcar_thermal_priv *priv = data;
+
+       return rcar_thermal_get_current_temp(priv, temp);
+}
+
+static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
+{
+       struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
+
+       return rcar_thermal_get_current_temp(priv, temp);
+}
+
 static int rcar_thermal_get_trip_type(struct thermal_zone_device *zone,
                                      int trip, enum thermal_trip_type *type)
 {
@@ -282,6 +299,10 @@ static int rcar_thermal_notify(struct thermal_zone_device *zone,
        return 0;
 }
 
+static const struct thermal_zone_of_device_ops rcar_thermal_zone_of_ops = {
+       .get_temp       = rcar_thermal_of_get_temp,
+};
+
 static struct thermal_zone_device_ops rcar_thermal_zone_ops = {
        .get_temp       = rcar_thermal_get_temp,
        .get_trip_type  = rcar_thermal_get_trip_type,
@@ -318,14 +339,20 @@ static void rcar_thermal_work(struct work_struct *work)
 
        priv = container_of(work, struct rcar_thermal_priv, work.work);
 
-       rcar_thermal_get_temp(priv->zone, &cctemp);
+       ret = rcar_thermal_get_current_temp(priv, &cctemp);
+       if (ret < 0)
+               return;
+
        ret = rcar_thermal_update_temp(priv);
        if (ret < 0)
                return;
 
        rcar_thermal_irq_enable(priv);
 
-       rcar_thermal_get_temp(priv->zone, &nctemp);
+       ret = rcar_thermal_get_current_temp(priv, &nctemp);
+       if (ret < 0)
+               return;
+
        if (nctemp != cctemp)
                thermal_zone_device_update(priv->zone);
 }
@@ -403,6 +430,8 @@ static int rcar_thermal_probe(struct platform_device *pdev)
        struct rcar_thermal_priv *priv;
        struct device *dev = &pdev->dev;
        struct resource *res, *irq;
+       const struct of_device_id *of_id = of_match_device(rcar_thermal_dt_ids, dev);
+       unsigned long of_data = (unsigned long)of_id->data;
        int mres = 0;
        int i;
        int ret = -ENODEV;
@@ -463,7 +492,13 @@ static int rcar_thermal_probe(struct platform_device *pdev)
                if (ret < 0)
                        goto error_unregister;
 
-               priv->zone = thermal_zone_device_register("rcar_thermal",
+               if (of_data == USE_OF_THERMAL)
+                       priv->zone = thermal_zone_of_sensor_register(
+                                               dev, i, priv,
+                                               &rcar_thermal_zone_of_ops);
+               else
+                       priv->zone = thermal_zone_device_register(
+                                               "rcar_thermal",
                                                1, 0, priv,
                                                &rcar_thermal_zone_ops, NULL, 0,
                                                idle);