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This is a minimal driver to support bringing a usb4604 device from microchip out of reset and into hub mode. The usb4604 device is related to the usb3503 device, but it didn't seem close enough to warrant putting both into the same file. This patch borrows some of the usb3503 structure and trims it down to just handle the optional reset gpio and adds the i2c command to put the device into hub mode. Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/00001716A.pdf Cc: <devicetree@vger.kernel.org> Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
20 lines
490 B
Plaintext
20 lines
490 B
Plaintext
SMSC USB4604 High-Speed Hub Controller
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Required properties:
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- compatible: Should be "smsc,usb4604"
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Optional properties:
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- reg: Specifies the i2c slave address, it is required and should be 0x2d
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if I2C is used.
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- reset-gpios: Should specify GPIO for reset.
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- initial-mode: Should specify initial mode.
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(1 for HUB mode, 2 for STANDBY mode)
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Examples:
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usb-hub@2d {
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compatible = "smsc,usb4604";
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reg = <0x2d>;
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reset-gpios = <&gpx3 5 1>;
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initial-mode = <1>;
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};
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