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.valen...@ti.com>
---
 drivers/staging/ti-soc-thermal/ti-bandgap.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/ti-soc-thermal/ti-bandgap.c 
b/drivers/staging/ti-soc-thermal/ti-bandgap.c
index d479e50..a6aa75f 100644
--- 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;
 }
 
 /**
-- 
1.7.7.1.488.ge8e1c

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