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phy: sun4i-usb: Add a sunxi specific function for setting squelch-detect

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The sunxi otg phy has a bug where it wrongly detects a high speed squelch
when reset on the root port gets de-asserted with a lo-speed device.

The workaround for this is to disable squelch detect before de-asserting
reset, and re-enabling it after the reset de-assert is done. Add a sunxi
specific phy function to allow the sunxi-musb glue to do this.

Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Hans de Goede 2015-03-29 12:50:46 +02:00 • committed by Felipe Balbi
parent 7a64c7283e
commit 24fe86a617
2 changed files with 35 additions and 0 deletions
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26
include/linux/phy/phy-sun4i-usb.h Normal file
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/*
* Copyright (c) 2015 Hans de Goede <hdegoede@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef PHY_SUN4I_USB_H_
#define PHY_SUN4I_USB_H_
#include "phy.h"
/**
* sun4i_usb_phy_set_squelch_detect() - Enable/disable squelch detect
* @phy: reference to a sun4i usb phy
* @enabled: wether to enable or disable squelch detect
*/
void sun4i_usb_phy_set_squelch_detect(struct phy *phy, bool enabled);
#endif