linux-kernel - [PATCH] ARM: dts: rockchip: Add usb host0 ohci node for rk3288

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Date:   Thu,  2 Jul 2020 14:32:59 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Heiko Stuebner <heiko@...ech.de>, Rob Herring <robh+dt@...nel.org>,
        mylene.josserand@...labora.com
Cc:     Suniel Mahesh <sunil@...rulasolutions.com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-amarula <linux-amarula@...rulasolutions.com>,
        Jagan Teki <jagan@...rulasolutions.com>,
        William Wu <william.wu@...k-chips.com>
Subject: [PATCH] ARM: dts: rockchip: Add usb host0 ohci node for rk3288

rk3288 and rk3288w have a usb host0 ohci controller.

Although rk3288 ohci doesn't actually work on hardware, but
rk3288w ohci can work well.

So add usb host0 ohci node in rk3288 dtsi and the quirk in
ohci platform driver will disable ohci on rk3288.

The bootloader must update the compatible in order to bypass
host0_ohci in legacy rk3288 platform.

Cc: William Wu <william.wu@...k-chips.com>
Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
---
Note:
- U-Boot patch for compatible update
https://patchwork.ozlabs.org/project/uboot/patch/20200702084820.35942-1-jagan@amarulasolutions.com/

 arch/arm/boot/dts/rk3288.dtsi | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
index 0cd88774db95..fd0066d07dfc 100644
--- a/arch/arm/boot/dts/rk3288.dtsi
+++ b/arch/arm/boot/dts/rk3288.dtsi
@@ -614,7 +614,19 @@ usb_host0_ehci: usb@...00000 {
 		status = "disabled";
 	};
 
-	/* NOTE: ohci@...20000 doesn't actually work on hardware */
+	/**
+	 * NOTE: ohci@...20000 doesn't actually work on hardware
+	 * hardware, but can work on rk3288w hardware.
+	 */
+	usb_host0_ohci: usb@...20000 {
+		compatible = "generic-ohci";
+		reg = <0x0 0xff520000 0x0 0x100>;
+		interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru HCLK_USBHOST0>;
+		phys = <&usbphy1>;
+		phy-names = "usb";
+		status = "disabled";
+	};
 
 	usb_host1: usb@...40000 {
 		compatible = "rockchip,rk3288-usb", "rockchip,rk3066-usb",
-- 
2.25.1