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usb: chipidea: usbmisc: evdo can be set e/o reset

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evdo bit can be set or reset. We can not trust evdo bit
status after bootloader stage

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Trimarchi 2018-03-29 17:52:46 +08:00 committed by Greg Kroah-Hartman
parent 9618d09349
commit 26250d540d
1 changed files with 12 additions and 8 deletions
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20
drivers/usb/chipidea/usbmisc_imx.c
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@ -151,14 +151,18 @@ static int usbmisc_imx25_post(struct imx_usbmisc_data *data)
if (data->index)
return 0;
if (data->evdo) {
spin_lock_irqsave(&usbmisc->lock, flags);
reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
val = readl(reg);
writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg);
spin_unlock_irqrestore(&usbmisc->lock, flags);
usleep_range(5000, 10000); /* needed to stabilize voltage */
}
spin_lock_irqsave(&usbmisc->lock, flags);
reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
val = readl(reg);
if (data->evdo)
val |= MX25_BM_EXTERNAL_VBUS_DIVIDER;
else
val &= ~MX25_BM_EXTERNAL_VBUS_DIVIDER;
writel(val, reg);
spin_unlock_irqrestore(&usbmisc->lock, flags);
usleep_range(5000, 10000); /* needed to stabilize voltage */
return 0;
}