linux-kernel - [PATCH v4 2/3] usb: chipidea: msm: Add device tree support

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Date:	Wed, 23 Apr 2014 15:28:03 +0300
From:	"Ivan T. Ivanov" <iivanov@...sol.com>
To:	Peter Chen <Peter.Chen@...escale.com>
Cc:	"Ivan T. Ivanov" <iivanov@...sol.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org
Subject: [PATCH v4 2/3] usb: chipidea: msm: Add device tree support

From: "Ivan T. Ivanov" <iivanov@...sol.com>

Allows controller to be specified via device tree.
Pass PHY phandle specified in DT to core driver.

Signed-off-by: Ivan T. Ivanov <iivanov@...sol.com>
---
 drivers/usb/chipidea/ci_hdrc_msm.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index 2d51d85..736aeb2 100644
--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -57,9 +57,21 @@ static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
 static int ci_hdrc_msm_probe(struct platform_device *pdev)
 {
 	struct platform_device *plat_ci;
+	struct usb_phy *phy;

 	dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n");

+	/*
+	 * OTG(PHY) driver takes care of PHY initialization, clock management,
+	 * powering up VBUS, mapping of registers address space and power
+	 * management.
+	 */
+	phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
+	if (IS_ERR(phy))
+		return PTR_ERR(phy);
+
+	ci_hdrc_msm_platdata.phy = phy;
+
 	plat_ci = ci_hdrc_add_device(&pdev->dev,
 				pdev->resource, pdev->num_resources,
 				&ci_hdrc_msm_platdata);
@@ -86,10 +98,19 @@ static int ci_hdrc_msm_remove(struct platform_device *pdev)
 	return 0;
 }

+static const struct of_device_id msm_ci_dt_match[] = {
+	{ .compatible = "qcom,ci-hdrc", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, msm_ci_dt_match);
+
 static struct platform_driver ci_hdrc_msm_driver = {
 	.probe = ci_hdrc_msm_probe,
 	.remove = ci_hdrc_msm_remove,
-	.driver = { .name = "msm_hsusb", },
+	.driver = {
+		.name = "msm_hsusb",
+		.of_match_table = msm_ci_dt_match,
+	},
 };

 module_platform_driver(ci_hdrc_msm_driver);
--
1.8.3.2

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