linux-kernel - [PATCH 2/3 v5] Fix Internal error: : 808 [#1] ARM related to STS flag

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Date:	Wed,  4 Dec 2013 09:56:18 +0800
From:	Chris Ruehl <chris.ruehl@...ys.com.hk>
To:	peter.chen@...escale.com
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Chris Ruehl <chris.ruehl@...ys.com.hk>
Subject: [PATCH 2/3 v5] Fix Internal error: : 808 [#1] ARM related to STS flag

Fix Internal error: : 808 [#1] ARM related to STS flag

* init the sts flag to 0 (missed)
* fix write the real bit not sts value
* Set PORTCS_STS and DEVLC_STS only if sts = 1
 (prefered solution by Mr. Peter Chen, Maintainer of ChipIdea subsystem)

Signed-off-by: Chris Ruehl <chris.ruehl@...ys.com.hk>
---
 drivers/usb/chipidea/core.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 9a5ef20..2834801 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -243,7 +243,7 @@ static int hw_device_init(struct ci_hdrc *ci, void __iomem *base)
 
 static void hw_phymode_configure(struct ci_hdrc *ci)
 {
-	u32 portsc, lpm, sts;
+	u32 portsc, lpm, sts = 0;
 
 	switch (ci->platdata->phy_mode) {
 	case USBPHY_INTERFACE_MODE_UTMI:
@@ -273,10 +273,12 @@ static void hw_phymode_configure(struct ci_hdrc *ci)
 
 	if (ci->hw_bank.lpm) {
 		hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm);
-		hw_write(ci, OP_DEVLC, DEVLC_STS, sts);
+		if (sts)
+			hw_write(ci, OP_DEVLC, DEVLC_STS, DEVLC_STS);
 	} else {
 		hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc);
-		hw_write(ci, OP_PORTSC, PORTSC_STS, sts);
+		if (sts)
+			hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS);
 	}
 }
 
-- 
1.7.10.4

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