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Revert "usb: otg: mxs-phy: Fix mx23 operation" 

The real reason causes mx23 fail are:

- Calling mxs_phy_hw_init(mxs_phy) again at connection
- Error connect/disconnect nodity at hub.c

The coming patch will fix above two problems, Mike Thompson
tested his hardware works OK after commented out this delay
setting.

This reverts commit 363366cf61.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Chen 2012-11-09 09:44:41 +08:00 committed by Greg Kroah-Hartman
parent ba2d8ce9db
commit ff84f0e9f7
1 changed files with 3 additions and 35 deletions
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38
drivers/usb/otg/mxs-phy.c
View File

@ -20,7 +20,6 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/workqueue.h>
#define DRIVER_NAME "mxs_phy"
@ -35,16 +34,9 @@
#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14)
#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1)
/*
* Amount of delay in miliseconds to safely enable ENHOSTDISCONDETECT bit
* so that connection and reset processing can be completed for the root hub.
*/
#define MXY_PHY_ENHOSTDISCONDETECT_DELAY 250
struct mxs_phy {
struct usb_phy phy;
struct clk *clk;
struct delayed_work enhostdiscondetect_work;
};
#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
@ -70,7 +62,6 @@ static int mxs_phy_init(struct usb_phy *phy)
clk_prepare_enable(mxs_phy->clk);
mxs_phy_hw_init(mxs_phy);
INIT_DELAYED_WORK(&mxs_phy->enhostdiscondetect_work, NULL);
return 0;
}
@ -85,34 +76,13 @@ static void mxs_phy_shutdown(struct usb_phy *phy)
clk_disable_unprepare(mxs_phy->clk);
}
static void mxs_phy_enhostdiscondetect_delay(struct work_struct *ws)
{
struct mxs_phy *mxs_phy = container_of(ws, struct mxs_phy,
enhostdiscondetect_work.work);
/* Enable HOSTDISCONDETECT after delay. */
dev_dbg(mxs_phy->phy.dev, "Setting ENHOSTDISCONDETECT\n");
writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
mxs_phy->phy.io_priv + HW_USBPHY_CTRL_SET);
}
static int mxs_phy_on_connect(struct usb_phy *phy, int port)
{
struct mxs_phy *mxs_phy = to_mxs_phy(phy);
dev_dbg(phy->dev, "Connect on port %d\n", port);
mxs_phy_hw_init(mxs_phy);
/*
* Delay enabling ENHOSTDISCONDETECT so that connection and
* reset processing can be completed for the root hub.
*/
dev_dbg(phy->dev, "Delaying setting ENHOSTDISCONDETECT\n");
PREPARE_DELAYED_WORK(&mxs_phy->enhostdiscondetect_work,
mxs_phy_enhostdiscondetect_delay);
schedule_delayed_work(&mxs_phy->enhostdiscondetect_work,
msecs_to_jiffies(MXY_PHY_ENHOSTDISCONDETECT_DELAY));
mxs_phy_hw_init(to_mxs_phy(phy));
writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
phy->io_priv + HW_USBPHY_CTRL_SET);
return 0;
}
@ -121,8 +91,6 @@ static int mxs_phy_on_disconnect(struct usb_phy *phy, int port)
{
dev_dbg(phy->dev, "Disconnect on port %d\n", port);
/* No need to delay before clearing ENHOSTDISCONDETECT. */
dev_dbg(phy->dev, "Clearing ENHOSTDISCONDETECT\n");
writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
phy->io_priv + HW_USBPHY_CTRL_CLR);