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Northstar is a family of SoCs used in home routers. They have USB 2.0 and 3.0 controllers with PHYs that need to be properly initialized. This driver provides PHY init support in a generic way and can be bound with an EHCI controller driver. There are (just a few) registers being defined in bcma header. It's because DMU/CRU registers will be also needed in other drivers. We will need them e.g. in PCIe controller/PHY driver and at some point probably in clock driver for BCM53573 chipset. By using include/linux/bcma/ we avoid code duplication. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
22 lines
674 B
Plaintext
22 lines
674 B
Plaintext
Driver for Broadcom Northstar USB 2.0 PHY
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Required properties:
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- compatible: brcm,ns-usb2-phy
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- reg: iomem address range of DMU (Device Management Unit)
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- reg-names: "dmu", the only needed & supported reg right now
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- clocks: USB PHY reference clock
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- clock-names: "phy-ref-clk", the only needed & supported clock right now
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To initialize USB 2.0 PHY driver needs to setup PLL correctly. To do this it
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requires passing phandle to the USB PHY reference clock.
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Example:
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usb2-phy {
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compatible = "brcm,ns-usb2-phy";
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reg = <0x1800c000 0x1000>;
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reg-names = "dmu";
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#phy-cells = <0>;
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clocks = <&genpll BCM_NSP_GENPLL_USB_PHY_REF_CLK>;
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clock-names = "phy-ref-clk";
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};
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