1 files changed, 61 insertions, 1 deletions

diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index be6485428198..66d889d54e58 100644
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -1056,6 +1056,54 @@ static const struct net_device_ops uhdlc_ops = {
 	.ndo_tx_timeout	= uhdlc_tx_timeout,
 };
 
+static int hdlc_map_iomem(char *name, int init_flag, void __iomem **ptr)
+{
+	struct device_node *np;
+	struct platform_device *pdev;
+	struct resource *res;
+	static int siram_init_flag;
+	int ret = 0;
+
+	np = of_find_compatible_node(NULL, NULL, name);
+	if (!np)
+		return -EINVAL;
+
+	pdev = of_find_device_by_node(np);
+	if (!pdev) {
+		pr_err("%pOFn: failed to lookup pdev\n", np);
+		of_node_put(np);
+		return -EINVAL;
+	}
+
+	of_node_put(np);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		ret = -EINVAL;
+		goto error_put_device;
+	}
+	*ptr = ioremap(res->start, resource_size(res));
+	if (!*ptr) {
+		ret = -ENOMEM;
+		goto error_put_device;
+	}
+
+	/* We've remapped the addresses, and we don't need the device any
+	 * more, so we should release it.
+	 */
+	put_device(&pdev->dev);
+
+	if (init_flag && siram_init_flag == 0) {
+		memset_io(*ptr, 0, resource_size(res));
+		siram_init_flag = 1;
+	}
+	return  0;
+
+error_put_device:
+	put_device(&pdev->dev);
+
+	return ret;
+}
+
 static int ucc_hdlc_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
@@ -1150,6 +1198,15 @@ static int ucc_hdlc_probe(struct platform_device *pdev)
 		ret = ucc_of_parse_tdm(np, utdm, ut_info);
 		if (ret)
 			goto free_utdm;
+
+		ret = hdlc_map_iomem("fsl,t1040-qe-si", 0,
+				     (void __iomem **)&utdm->si_regs);
+		if (ret)
+			goto free_utdm;
+		ret = hdlc_map_iomem("fsl,t1040-qe-siram", 1,
+				     (void __iomem **)&utdm->siram);
+		if (ret)
+			goto unmap_si_regs;
 	}
 
 	if (of_property_read_u16(np, "fsl,hmask", &uhdlc_priv->hmask))
@@ -1158,7 +1215,7 @@ static int ucc_hdlc_probe(struct platform_device *pdev)
 	ret = uhdlc_init(uhdlc_priv);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to init uhdlc\n");
-		goto free_utdm;
+		goto undo_uhdlc_init;
 	}
 
 	dev = alloc_hdlcdev(uhdlc_priv);
@@ -1187,6 +1244,9 @@ static int ucc_hdlc_probe(struct platform_device *pdev)
 free_dev:
 	free_netdev(dev);
 undo_uhdlc_init:
+	iounmap(utdm->siram);
+unmap_si_regs:
+	iounmap(utdm->si_regs);
 free_utdm:
 	if (uhdlc_priv->tsa)
 		kfree(utdm);