linux-kernel - [PATCH] rtc: rv3028: Use IRQ flags obtained from device tree if available

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Message-ID: <20221208133605.4193907-1-w.egorov@phytec.de>
Date:   Thu, 8 Dec 2022 14:36:05 +0100
From:   Wadim Egorov <w.egorov@...tec.de>
To:     <linux-rtc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <upstream@...tec.de>
CC:     <a.zummo@...ertech.it>, <alexandre.belloni@...tlin.com>
Subject: [PATCH] rtc: rv3028: Use IRQ flags obtained from device tree if available

Make the interrupt pin of the RV3028 usable with GPIO controllers
without level type IRQs support, such as the TI Davinci GPIO controller.

Therefore, allow the IRQ type to be passed from the device tree if
available.

Based on commit d4785b46345c ("rtc: pcf2127: use IRQ flags obtained from device tree if available")

Signed-off-by: Wadim Egorov <w.egorov@...tec.de>
---
 drivers/rtc/rtc-rv3028.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-rv3028.c b/drivers/rtc/rtc-rv3028.c
index dd170e3efd83..b0099e26e3b0 100644
--- a/drivers/rtc/rtc-rv3028.c
+++ b/drivers/rtc/rtc-rv3028.c
@@ -902,9 +902,20 @@ static int rv3028_probe(struct i2c_client *client)
 		return PTR_ERR(rv3028->rtc);
 
 	if (client->irq > 0) {
+		unsigned long flags;
+
+		/*
+		 * If flags = 0, devm_request_threaded_irq() will use IRQ flags
+		 * obtained from device tree.
+		 */
+		if (dev_fwnode(&client->dev))
+			flags = 0;
+		else
+			flags = IRQF_TRIGGER_LOW;
+
 		ret = devm_request_threaded_irq(&client->dev, client->irq,
 						NULL, rv3028_handle_irq,
-						IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+						flags | IRQF_ONESHOT,
 						"rv3028", rv3028);
 		if (ret) {
 			dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
-- 
2.34.1