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>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index d79ecc08a1be..3889809fd0c4 100644
--- 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: