linux-kernel - [PATCH] clocksource/drivers/timer-ti-dm: Don't fail probe if int not found

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Message-ID: <20240924223452.895081-1-jm@ti.com>
Date: Tue, 24 Sep 2024 17:34:52 -0500
From: Judith Mendez <jm@...com>
To: <linux-kernel@...r.kernel.org>
CC: Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner
	<tglx@...utronix.de>, Judith Mendez <jm@...com>
Subject: [PATCH] clocksource/drivers/timer-ti-dm: Don't fail probe if int not found

Some timers may not have an interrupt routed to
the A53 GIC, but the timer PWM functionality can still
be used by Linux Kernel. Therefore, do not fail probe
if interrupt is not found and ti,timer-pwm exists.

Signed-off-by: Judith Mendez <jm@...com>
---
 drivers/clocksource/timer-ti-dm.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index b7a34b1a975e..1b61fefed213 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -1104,8 +1104,12 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 		return  -ENOMEM;
 
 	timer->irq = platform_get_irq(pdev, 0);
-	if (timer->irq < 0)
-		return timer->irq;
+	if (timer->irq < 0) {
+		if (of_property_read_bool(dev->of_node, "ti,timer-pwm"))
+			dev_err(dev, "Did not find timer interrupt, timer usable in PWM mode only\n");
+		else
+			return timer->irq;
+	}
 
 	timer->io_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(timer->io_base))
-- 
2.46.0