linux-kernel - [PATCH 1/4] serial: sc16is7xx: use device_property APIs when configuring irda mode

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Message-Id: <20230920152015.1376838-2-hugo@hugovil.com>
Date:   Wed, 20 Sep 2023 11:20:12 -0400
From:   Hugo Villeneuve <hugo@...ovil.com>
To:     gregkh@...uxfoundation.org, jirislaby@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, hvilleneuve@...onoff.com
Cc:     linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        devicetree@...r.kernel.org, hugo@...ovil.com
Subject: [PATCH 1/4] serial: sc16is7xx: use device_property APIs when configuring irda mode

From: Hugo Villeneuve <hvilleneuve@...onoff.com>

Convert driver to be property provider agnostic and allow it to be
used on non-OF platforms.

Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>
---
 drivers/tty/serial/sc16is7xx.c | 34 ++++++++++++++++++++++++----------
 1 file changed, 24 insertions(+), 10 deletions(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 1fe2c3e08a35..db2bb1c0d36c 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -1408,6 +1408,29 @@ static int sc16is7xx_setup_gpio_chip(struct sc16is7xx_port *s)
 }
 #endif
 
+static void sc16is7xx_setup_irda_ports(struct sc16is7xx_port *s)
+{
+	int i;
+	int ret;
+	int count;
+	u32 irda_port[2];
+	struct device *dev = s->p[0].port.dev;
+
+	count = device_property_count_u32(dev, "irda-mode-ports");
+	if (count < 0 || count > ARRAY_SIZE(irda_port))
+		return;
+
+	ret = device_property_read_u32_array(dev, "irda-mode-ports",
+					     irda_port, count);
+	if (ret)
+		return;
+
+	for (i = 0; i < count; i++) {
+		if (irda_port[i] < s->devtype->nr_uart)
+			s->p[irda_port[i]].irda_mode = true;
+	}
+}
+
 /*
  * Configure ports designated to operate as modem control lines.
  */
@@ -1590,16 +1613,7 @@ static int sc16is7xx_probe(struct device *dev,
 		sc16is7xx_power(&s->p[i].port, 0);
 	}
 
-	if (dev->of_node) {
-		struct property *prop;
-		const __be32 *p;
-		u32 u;
-
-		of_property_for_each_u32(dev->of_node, "irda-mode-ports",
-					 prop, p, u)
-			if (u < devtype->nr_uart)
-				s->p[u].irda_mode = true;
-	}
+	sc16is7xx_setup_irda_ports(s);
 
 	ret = sc16is7xx_setup_mctrl_ports(s);
 	if (ret)
-- 
2.30.2