linux-kernel - [PATCH v2] drivers: thermal: tsens: Work with old DTBs

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Date:   Thu, 12 Dec 2019 16:08:14 +0530
From:   Amit Kucheria <amit.kucheria@...aro.org>
To:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        bjorn.andersson@...aro.org, agross@...nel.org, swboyd@...omium.org,
        stephan@...hold.net, olof@...om.net,
        Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     linux-pm@...r.kernel.org
Subject: [PATCH v2] 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: 634e11d5b450a ("drivers: thermal: tsens: Add interrupt support")
Suggested-by: Stephan Gerhold <stephan@...hold.net>
Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
---
 drivers/thermal/qcom/tsens.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 015e7d2015985..0e7cf52369326 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/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;
 	}
 
-- 
2.20.1