[PATCH v3 07/10] usb: chipidea: usbmisc_imx: add non-burst setting for imx6

[Peter Chen]

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.c...@freescale.com>
---
 drivers/usb/chipidea/usbmisc_imx.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/chipidea/usbmisc_imx.c 
b/drivers/usb/chipidea/usbmisc_imx.c
index 3cefd49..5ddab30 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;
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html