[PATCH 1/2] usb: chipidea: msm: Use posted data writes on AHB

From	Andy Gross <agross@codeaurora.org>
Newsgroups	linux.kernel
Subject	[PATCH 1/2] usb: chipidea: msm: Use posted data writes on AHB
Date	2015-11-06 07:10 +0100
Message-ID	<qrInL-JI-3@gated-at.bofh.it> (permalink)
References	<qrInL-JI-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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

Signed-off-by: Andy Gross <agross@codeaurora.org>
---
 drivers/usb/chipidea/ci_hdrc_msm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index d79ecc0..3889809 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:
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

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[PATCH 1/2] usb: chipidea: msm: Use posted data writes on AHB Andy Gross <agross@codeaurora.org> - 2015-11-06 07:10 +0100

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