staging: ti-soc-thermal: return error in case power switch is not supported

Improve ti_bandgap_power by returning an error code in case
the device does not support controlling its power state.

Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/ti-soc-thermal/ti-bandgap.c b/drivers/staging/ti-soc-thermal/ti-bandgap.c
index d479e50..a6aa75f 100644 (file)
--- a/drivers/staging/ti-soc-thermal/ti-bandgap.c
+++ b/drivers/staging/ti-soc-thermal/ti-bandgap.c
@@ -100,17 +100,19 @@ do {                                                              \
  */
 static int ti_bandgap_power(struct ti_bandgap *bgp, bool on)
 {
-       int i;
+       int i, ret = 0;
 
-       if (!TI_BANDGAP_HAS(bgp, POWER_SWITCH))
+       if (!TI_BANDGAP_HAS(bgp, POWER_SWITCH)) {
+               ret = -ENOTSUPP;
                goto exit;
+       }
 
        for (i = 0; i < bgp->conf->sensor_count; i++)
                /* active on 0 */
                RMW_BITS(bgp, i, temp_sensor_ctrl, bgap_tempsoff_mask, !on);
 
 exit:
-       return 0;
+       return ret;
 }
 
 /**