[PATCH 2/2] usb: host: ehci-msm: Use posted data writes on AHB

From: Andy Gross
Date: Fri Nov 06 2015 - 01:05:00 EST

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

Signed-off-by: Andy Gross <agross@xxxxxxxxxxxxxx>
drivers/usb/host/ehci-msm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c
index c4f84c8..c23e285 100644
--- a/drivers/usb/host/ehci-msm.c
+++ b/drivers/usb/host/ehci-msm.c
@@ -57,8 +57,8 @@ static int ehci_msm_reset(struct usb_hcd *hcd)

/* bursts of unspecified length. */
writel(0, USB_AHBBURST);
- /* Use the AHB transactor */
- writel(0, USB_AHBMODE);
+ /* Use the AHB transactor, allow posted data writes */
+ writel(0x8, USB_AHBMODE);
/* Disable streaming mode and select host mode */
writel(0x13, USB_USBMODE);

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