linux-kernel - [PATCH 10/22] usb: phy: am335x-control: Use of_device

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Date:	Mon,  6 Jun 2016 10:31:52 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Rob Herring <robh+dt@...nel.org>,
	Frank Rowand <frowand.list@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Russell King <linux@...linux.org.uk>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 10/22] usb: phy: am335x-control: Use of_device_match()

From: Thierry Reding <treding@...dia.com>

This driver uses bus_find_device() to go through every platform device
and match using the driver and device tree node. It's more efficient to
use driver_find_device() to iterate over all devices associated with a
particular driver, in which case the matching is reduced to the device
tree node and can be done using the common implementation.

Signed-off-by: Thierry Reding <treding@...dia.com>
---
 drivers/usb/phy/phy-am335x-control.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/usb/phy/phy-am335x-control.c b/drivers/usb/phy/phy-am335x-control.c
index 42a1afe36a90..1ac16f649154 100644
--- a/drivers/usb/phy/phy-am335x-control.c
+++ b/drivers/usb/phy/phy-am335x-control.c
@@ -2,6 +2,7 @@
 #include <linux/platform_device.h>
 #include <linux/err.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/io.h>
 #include <linux/delay.h>
 #include <linux/usb/otg.h>
@@ -117,12 +118,6 @@ static const struct of_device_id omap_control_usb_id_table[] = {
 MODULE_DEVICE_TABLE(of, omap_control_usb_id_table);
 
 static struct platform_driver am335x_control_driver;
-static int match(struct device *dev, void *data)
-{
-	struct device_node *node = (struct device_node *)data;
-	return dev->of_node == node &&
-		dev->driver == &am335x_control_driver.driver;
-}
 
 struct phy_control *am335x_get_phy_control(struct device *dev)
 {
@@ -133,7 +128,8 @@ struct phy_control *am335x_get_phy_control(struct device *dev)
 	if (!node)
 		return NULL;
 
-	dev = bus_find_device(&platform_bus_type, NULL, node, match);
+	dev = driver_find_device(&am335x_control_driver.driver, NULL, node,
+				 of_device_match);
 	if (!dev)
 		return NULL;
 
-- 
2.8.3