usb: chipidea: imx: set CI_HDRC_IMX28_WRITE_FIX for imx28

Due to imx28 needs ARM swp instruction for writing, we set
CI_HDRC_IMX28_WRITE_FIX for imx28.

This patch is needed for stable tree 3.11+

Cc: stable@vger.kernel.org
Cc: robert.hodaszi@digi.com
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 26 insertions, 6 deletions

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index bb5d976e5b81..c00f77257d36 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -23,6 +23,26 @@
 #include "ci.h"
 #include "ci_hdrc_imx.h"
 
+#define CI_HDRC_IMX_IMX28_WRITE_FIX BIT(0)
+
+struct ci_hdrc_imx_platform_flag {
+        unsigned int flags;
+};
+
+static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
+};
+
+static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
+        .flags = CI_HDRC_IMX_IMX28_WRITE_FIX,
+};
+
+static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
+        { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
+        { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
+
 struct ci_hdrc_imx_data {
         struct usb_phy *phy;
         struct platform_device *ci_pdev;
@@ -82,6 +102,9 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
                                   CI_HDRC_DISABLE_STREAMING,
         };
         int ret;
+        const struct of_device_id *of_id =
+                        of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
+        const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data;
 
         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
         if (!data) {
@@ -115,6 +138,9 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
 
         pdata.phy = data->phy;
 
+        if (imx_platform_flag->flags & CI_HDRC_IMX_IMX28_WRITE_FIX)
+                pdata.flags |= CI_HDRC_IMX28_WRITE_FIX;
+
         ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
         if (ret)
                 goto err_clk;
@@ -173,12 +199,6 @@ static int ci_hdrc_imx_remove(struct platform_device *pdev)
         return 0;
 }
 
-static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
-        { .compatible = "fsl,imx27-usb", },
-        { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
-
 static struct platform_driver ci_hdrc_imx_driver = {
         .probe = ci_hdrc_imx_probe,
         .remove = ci_hdrc_imx_remove,