[PATCH v3 4/7] thermal: rcar_gen3_thermal: record and check number of TSCs found

[Niklas Söderlund]

Record how many TSCs are found in struct rcar_gen3_thermal_priv, this is
needed to be able to add hardware interrupts for trip points later. Also
add a check to make sure at least one TSC is found.

Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+rene...@glider.be>
Reviewed-by: Wolfram Sang <wsa+rene...@sang-engineering.com>
---
 drivers/thermal/rcar_gen3_thermal.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/thermal/rcar_gen3_thermal.c 
b/drivers/thermal/rcar_gen3_thermal.c
index 9b6bc03dd142a8dd..4a08b35533dcc3a9 100644
--- a/drivers/thermal/rcar_gen3_thermal.c
+++ b/drivers/thermal/rcar_gen3_thermal.c
@@ -75,6 +75,7 @@ struct rcar_gen3_thermal_tsc {
 
 struct rcar_gen3_thermal_priv {
        struct rcar_gen3_thermal_tsc *tscs[TSC_MAX_NUM];
+       unsigned int num_tscs;
 };
 
 struct rcar_gen3_thermal_data {
@@ -307,6 +308,13 @@ static int rcar_gen3_thermal_probe(struct platform_device 
*pdev)
                tsc->zone = zone;
        }
 
+       priv->num_tscs = i;
+
+       if (!priv->num_tscs) {
+               ret = -ENODEV;
+               goto error_unregister;
+       }
+
        return 0;
 
 error_unregister:
-- 
2.12.1