drivers: thermal: tsens: Work with old DTBs

In order for the old DTBs to continue working, the new interrupt code
must not return an error if interrupts are not defined. Don't return an
error in case of -ENXIO.

Fixes: 634e11d ("drivers: thermal: tsens: Add interrupt support")
Suggested-by: Stephan Gerhold <[email protected]>
Signed-off-by: Amit Kucheria <[email protected]>
Reviewed-by: Bjorn Andersson <[email protected]>
Tested-by: Bjorn Andersson <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Link: https://lore.kernel.org/r/cea3317c5d793db312064d68b261ad420a4a81b1.1576146898.git.amit.kucheria@linaro.org

Author: idlethread

drivers/thermal/qcom/tsens.c

@@ -110,6 +110,9 @@ static int tsens_register(struct tsens_priv *priv)
 	irq = platform_get_irq_byname(pdev, "uplow");
 	if (irq < 0) {
 		ret = irq;
+		/* For old DTs with no IRQ defined */
+		if (irq == -ENXIO)
+			ret = 0;
 		goto err_put_device;
 	}