linux-kernel - [PATCH v3 4/8] phy: phy-rockchip-inno-usb2: support standalone phy nodes

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Date:   Wed, 15 Dec 2021 16:02:48 -0500
From:   Peter Geis <pgwipeout@...il.com>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc:     Peter Geis <pgwipeout@...il.com>,
        Michael Riesch <michael.riesch@...fvision.net>,
        linux-phy@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 4/8] phy: phy-rockchip-inno-usb2: support standalone phy nodes

New Rockchip devices have the usb2 phy devices as standalone nodes
instead of children of the grf node.
Allow the driver to find the grf node from a phandle.

Signed-off-by: Peter Geis <pgwipeout@...il.com>
Tested-by: Michael Riesch <michael.riesch@...fvision.net>

---
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index 5cfa7169d879..29e3a0da8c26 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -1074,12 +1074,19 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	if (!dev->parent || !dev->parent->of_node)
-		return -EINVAL;
+	if (!dev->parent || !dev->parent->of_node) {
+		rphy->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,usbgrf");
+		if (IS_ERR(rphy->grf)) {
+			dev_err(dev, "failed to locate usbgrf\n");
+			return PTR_ERR(rphy->grf);
+		}
+	}
 
-	rphy->grf = syscon_node_to_regmap(dev->parent->of_node);
-	if (IS_ERR(rphy->grf))
-		return PTR_ERR(rphy->grf);
+	else {
+		rphy->grf = syscon_node_to_regmap(dev->parent->of_node);
+			if (IS_ERR(rphy->grf))
+				return PTR_ERR(rphy->grf);
+	}
 
 	if (of_device_is_compatible(np, "rockchip,rv1108-usb2phy")) {
 		rphy->usbgrf =
-- 
2.25.1