usb: chipidea: msm: Use posted data writes on AHB

This patch sets the AHBMODE to allow for posted data writes.  This
results in higher performance.

Signed-off-by: Andy Gross <agross@codeaurora.org>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index d79ecc0..3889809 100644 (file)
--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -25,7 +25,8 @@ static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
        case CI_HDRC_CONTROLLER_RESET_EVENT:
                dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
                writel(0, USB_AHBBURST);
-               writel(0, USB_AHBMODE);
+               /* use AHB transactor, allow posted data writes */
+               writel(0x8, USB_AHBMODE);
                usb_phy_init(ci->usb_phy);
                break;
        case CI_HDRC_CONTROLLER_STOPPED_EVENT: