linux-kernel - [PATCH 4/5] usb: musb: jz4740: Unconditionally depend on devicetree

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Message-Id: <20200115220008.91445-5-paul@crapouillou.net>
Date:   Wed, 15 Jan 2020 19:00:07 -0300
From:   Paul Cercueil <paul@...pouillou.net>
To:     Bin Liu <b-liu@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     od@...c.me, linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 4/5] usb: musb: jz4740: Unconditionally depend on devicetree

The jz4740-musb driver is unconditionally probed from devicetree, so we
can add a hard dependency on devicetree. This makes the code a bit
cleaner, and is more future-proof as the platform data is now retrieved
using of_device_get_match_data().

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/usb/musb/Kconfig  |  1 +
 drivers/usb/musb/jz4740.c | 14 +++++++++-----
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index 3268adb7d7cf..3b0d1c20ebe6 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -110,6 +110,7 @@ config USB_MUSB_UX500
 
 config USB_MUSB_JZ4740
 	tristate "JZ4740"
+	depends on OF
 	depends on MIPS || COMPILE_TEST
 	depends on USB_MUSB_GADGET
 	depends on USB=n || USB_OTG_BLACKLIST_HUB
diff --git a/drivers/usb/musb/jz4740.c b/drivers/usb/musb/jz4740.c
index bbfeb9881788..b6747bad4fb2 100644
--- a/drivers/usb/musb/jz4740.c
+++ b/drivers/usb/musb/jz4740.c
@@ -164,7 +164,7 @@ static const struct musb_hdrc_platform_data jz4740_musb_pdata = {
 static int jz4740_probe(struct platform_device *pdev)
 {
 	struct device			*dev = &pdev->dev;
-	const struct musb_hdrc_platform_data *pdata = &jz4740_musb_pdata;
+	const struct musb_hdrc_platform_data *pdata;
 	struct platform_device		*musb;
 	struct jz4740_glue		*glue;
 	struct clk			*clk;
@@ -174,6 +174,12 @@ static int jz4740_probe(struct platform_device *pdev)
 	if (!glue)
 		return -ENOMEM;
 
+	pdata = of_device_get_match_data(dev);
+	if (!pdata) {
+		dev_err(dev, "missing platform data");
+		return -EINVAL;
+	}
+
 	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
 	if (!musb) {
 		dev_err(dev, "failed to allocate musb device");
@@ -240,20 +246,18 @@ static int jz4740_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_OF
 static const struct of_device_id jz4740_musb_of_match[] = {
-	{ .compatible = "ingenic,jz4740-musb" },
+	{ .compatible = "ingenic,jz4740-musb", .data = &jz4740_musb_pdata },
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, jz4740_musb_of_match);
-#endif
 
 static struct platform_driver jz4740_driver = {
 	.probe		= jz4740_probe,
 	.remove		= jz4740_remove,
 	.driver		= {
 		.name	= "musb-jz4740",
-		.of_match_table = of_match_ptr(jz4740_musb_of_match),
+		.of_match_table = jz4740_musb_of_match,
 	},
 };
 
-- 
2.24.1