linux-kernel - [PATCH v2] clocksource/drivers/timer-ti-dm: Don't fail probe if int not found

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Message-ID: <20241011175203.1040568-1-jm@ti.com>
Date: Fri, 11 Oct 2024 12:52:03 -0500
From: Judith Mendez <jm@...com>
To: Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner
	<tglx@...utronix.de>
CC: <linux-kernel@...r.kernel.org>, Vignesh Raghavendra <vigneshr@...com>,
        Bryan Brattlof <bb@...com>, Judith Mendez <jm@...com>
Subject: [PATCH v2] 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>
---
Changes since v1:
- Switch to dev_info()
- Drop fixes tag

Link to v1: https://lore.kernel.org/all/20241010144440.24654-1-jm@ti.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..3666d94cc8dd 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_info(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))

base-commit: d3d1556696c1a993eec54ac585fe5bf677e07474
-- 
2.47.0