linux-kernel - [PATCH] w1: omap-hdq: support device probing with device-tree.

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Message-ID: <20141108103032.5426db7a@notabene.brown>
Date:	Sat, 8 Nov 2014 10:30:32 +1100
From:	NeilBrown <neilb@...e.de>
To:	Evgeniy Polyakov <zbr@...emap.net>,
	Tony Lindgren <tony@...mide.com>
Cc:	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org,
	GTA04 owners <gta04-owner@...delico.com>
Subject: [PATCH] w1: omap-hdq: support device probing with device-tree.



This driver has no 'compatible' string and so is not found when
using device-tree.

Add one with value to match
		hdqw1w: 1w@...b2000 {
device in omap3.dtsi.

Signed-off-by: NeilBrown <neilb@...e.de>

diff --git a/Documentation/devicetree/bindings/w1/omap-hdq.txt b/Documentation/devicetree/bindings/w1/omap-hdq.txt
new file mode 100644
index 000000000000..fef794741bd1
--- /dev/null
+++ b/Documentation/devicetree/bindings/w1/omap-hdq.txt
@@ -0,0 +1,17 @@
+* OMAP HDQ One wire bus master controller
+
+Required properties:
+- compatible : should be "ti,omap3-1w"
+- reg : Address and length of the register set for the device
+- interrupts : interrupt line.
+- ti,hwmods : "hdq1w"
+
+Example:
+
+- From omap3.dtsi
+  hdqw1w: 1w@...b2000 {
+	compatible = "ti,omap3-1w";
+	reg = <0x480b2000 0x1000>;
+	interrupts = <58>;
+	ti,hwmods = "hdq1w";
+  };
diff --git a/drivers/w1/masters/omap_hdq.c b/drivers/w1/masters/omap_hdq.c
index 9900e8ec7393..03321d6a2684 100644
--- a/drivers/w1/masters/omap_hdq.c
+++ b/drivers/w1/masters/omap_hdq.c
@@ -72,11 +72,18 @@ struct hdq_data {
 static int omap_hdq_probe(struct platform_device *pdev);
 static int omap_hdq_remove(struct platform_device *pdev);
 
+static struct of_device_id omap_hdq_dt_ids[] = {
+	{ .compatible = "ti,omap3-1w" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, omap_hdq_dt_ids);
+
 static struct platform_driver omap_hdq_driver = {
 	.probe =	omap_hdq_probe,
 	.remove =	omap_hdq_remove,
 	.driver =	{
 		.name =	"omap_hdq",
+		.of_match_table = omap_hdq_dt_ids,
 	},
 };
 

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