linux-kernel - [PATCH 3/5] usb: exynos: add support for getting PHYs from the standard dt array

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Message-id: <20190521115849.9882-4-m.szyprowski@samsung.com>
Date:   Tue, 21 May 2019 13:58:47 +0200
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     linux-usb@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Markus Reichl <m.reichl@...etechno.de>,
        Måns Rullgård <mans@...sr.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Peter Chen <peter.chen@....com>,
        Alan Stern <stern@...land.harvard.edu>,
        Rob Herring <robh+dt@...nel.org>
Subject: [PATCH 3/5] usb: exynos: add support for getting PHYs from the
 standard dt array

Add the code for getting generic PHYs from standard device tree array
from the main controller device node. This is a first step in resolving
the conflict between Exynos EHCI/OHCI sub-nodes and generic USB device
bindings. Later the sub-nodes currently used for assigning PHYs to root
ports of the controller will be removed making a place for the generic
USB device bindings nodes.

Suggested-by: Måns Rullgård <mans@...sr.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
---
 drivers/usb/host/ehci-exynos.c | 14 +++++++++++++-
 drivers/usb/host/ohci-exynos.c | 14 +++++++++++++-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 3a29a1a8519c..2a551a807ec0 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -50,10 +50,22 @@ static int exynos_ehci_get_phy(struct device *dev,
 {
 	struct device_node *child;
 	struct phy *phy;
-	int phy_number;
+	int phy_number, num_phys;
 	int ret;
 
 	/* Get PHYs for the controller */
+	num_phys = of_count_phandle_with_args(dev->of_node, "phys",
+					      "#phy-cells");
+	for (phy_number = 0; phy_number < num_phys; phy_number++) {
+		phy = devm_of_phy_get_by_index(dev, dev->of_node, phy_number);
+		if (IS_ERR(phy))
+			return PTR_ERR(phy);
+		exynos_ehci->phy[phy_number] = phy;
+	}
+	if (num_phys)
+		return 0;
+
+	/* Get PHYs using legacy bindings */
 	for_each_available_child_of_node(dev->of_node, child) {
 		ret = of_property_read_u32(child, "reg", &phy_number);
 		if (ret) {
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 905c6317e0c3..195ea5fa021e 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -39,10 +39,22 @@ static int exynos_ohci_get_phy(struct device *dev,
 {
 	struct device_node *child;
 	struct phy *phy;
-	int phy_number;
+	int phy_number, num_phys;
 	int ret;
 
 	/* Get PHYs for the controller */
+	num_phys = of_count_phandle_with_args(dev->of_node, "phys",
+					      "#phy-cells");
+	for (phy_number = 0; phy_number < num_phys; phy_number++) {
+		phy = devm_of_phy_get_by_index(dev, dev->of_node, phy_number);
+		if (IS_ERR(phy))
+			return PTR_ERR(phy);
+		exynos_ohci->phy[phy_number] = phy;
+	}
+	if (num_phys)
+		return 0;
+
+	/* Get PHYs using legacy bindings */
 	for_each_available_child_of_node(dev->of_node, child) {
 		ret = of_property_read_u32(child, "reg", &phy_number);
 		if (ret) {
-- 
2.17.1