usb: chipidea: usbmisc_imx: add non-burst setting for imx6

With this setting and AHBBRST at SBUSCFG as "Incremental burst of
unspecified length", each non-burst size can be taken as single
transfer. It is benefit for non-burst size transfer.

Signed-off-by: Peter Chen <peter.chen@freescale.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 3cefd49ddb00..5ddab30ee240 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -54,6 +54,7 @@
 #define MX53_USB_PHYCTRL1_PLLDIV_MASK   0x3
 #define MX53_USB_PLL_DIV_24_MHZ         0x01
 
+#define MX6_BM_NON_BURST_SETTING        BIT(1)
 #define MX6_BM_OVER_CUR_DIS             BIT(7)
 #define MX6_BM_WAKEUP_ENABLE            BIT(10)
 #define MX6_BM_ID_WAKEUP                BIT(16)
@@ -255,14 +256,21 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
         if (data->index > 3)
                 return -EINVAL;
 
+        spin_lock_irqsave(&usbmisc->lock, flags);
+
         if (data->disable_oc) {
-                spin_lock_irqsave(&usbmisc->lock, flags);
                 reg = readl(usbmisc->base + data->index * 4);
                 writel(reg | MX6_BM_OVER_CUR_DIS,
                         usbmisc->base + data->index * 4);
-                spin_unlock_irqrestore(&usbmisc->lock, flags);
         }
 
+        /* SoC non-burst setting */
+        reg = readl(usbmisc->base + data->index * 4);
+        writel(reg | MX6_BM_NON_BURST_SETTING,
+                        usbmisc->base + data->index * 4);
+
+        spin_unlock_irqrestore(&usbmisc->lock, flags);
+
         usbmisc_imx6q_set_wakeup(data, false);
 
         return 0;