pci: layerscape: add official ls1028a binding support

The official bindind of the PCIe controller of the ls1028a has the
following compatible string:
  compatible = "fsl,ls1028a-pcie";

Additionally, the resource names and count are different. Update the
driver to support this binding and change the entry in the ls1028a
device tree.

Cc: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

arch/arm/dts/fsl-ls1028a.dtsi

@@ -344,12 +344,10 @@
 		};
 
 		pcie1: pcie@3400000 {
-			compatible = "fsl,ls-pcie", "fsl,ls1028-pcie", "snps,dw-pcie";
+			compatible = "fsl,ls1028a-pcie";
-			reg = <0x00 0x03400000 0x0 0x80000
+			reg = <0x00 0x03400000 0x0 0x00100000>, /* controller registers */
-			       0x00 0x03480000 0x0 0x40000   /* lut registers */
+			      <0x80 0x00000000 0x0 0x00002000>; /* configuration space */
-			       0x00 0x034c0000 0x0 0x40000   /* pf controls registers */
+			reg-names = "regs", "config";
-			       0x80 0x00000000 0x0 0x20000>; /* configuration space */
-			reg-names = "dbi", "lut", "ctrl", "config";
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";
@@ -360,12 +358,10 @@
 		};
 
 		pcie2: pcie@3500000 {
-			compatible = "fsl,ls-pcie", "fsl,ls1028-pcie", "snps,dw-pcie";
+			compatible = "fsl,ls1028a-pcie";
-			reg = <0x00 0x03500000 0x0 0x80000
+			reg = <0x00 0x03500000 0x0 0x00100000>, /* controller registers */
-			       0x00 0x03580000 0x0 0x40000   /* lut registers */
+			      <0x88 0x00000000 0x0 0x00002000>; /* configuration space */
-			       0x00 0x035c0000 0x0 0x40000   /* pf controls registers */
+			reg-names = "regs", "config";
-			       0x88 0x00000000 0x0 0x20000>; /* configuration space */
-			reg-names = "dbi", "lut", "ctrl", "config";
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";

drivers/pci/pcie_layerscape_rc.c

@@ -21,6 +21,12 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+struct ls_pcie_drvdata {
+	u32 lut_offset;
+	u32 ctrl_offset;
+	bool big_endian;
+};
+
 static void ls_pcie_cfg0_set_busdev(struct ls_pcie_rc *pcie_rc, u32 busdev)
 {
 	struct ls_pcie *pcie = pcie_rc->pcie;
@@ -243,6 +249,7 @@ static void ls_pcie_setup_ctrl(struct ls_pcie_rc *pcie_rc)
 
 static int ls_pcie_probe(struct udevice *dev)
 {
+	const struct ls_pcie_drvdata *drvdata = (void *)dev_get_driver_data(dev);
 	struct ls_pcie_rc *pcie_rc = dev_get_priv(dev);
 	const void *fdt = gd->fdt_blob;
 	int node = dev_of_offset(dev);
@@ -260,8 +267,12 @@ static int ls_pcie_probe(struct udevice *dev)
 
 	pcie_rc->pcie = pcie;
 
+	/* try resource name of the official binding first */
 	ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
-				     "dbi", &pcie_rc->dbi_res);
+				     "regs", &pcie_rc->dbi_res);
+	if (ret)
+		ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
+					     "dbi", &pcie_rc->dbi_res);
 	if (ret) {
 		printf("ls-pcie: resource \"dbi\" not found\n");
 		return ret;
@@ -287,21 +298,29 @@ static int ls_pcie_probe(struct udevice *dev)
 	if (pcie->mode == PCI_HEADER_TYPE_NORMAL)
 		return 0;
 
-	ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
+	if (drvdata) {
-				     "lut", &pcie_rc->lut_res);
+		pcie->lut = pcie->dbi + drvdata->lut_offset;
-	if (!ret)
+	} else {
-		pcie->lut = map_physmem(pcie_rc->lut_res.start,
+		ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
-					fdt_resource_size(&pcie_rc->lut_res),
+					     "lut", &pcie_rc->lut_res);
-					MAP_NOCACHE);
+		if (!ret)
+			pcie->lut = map_physmem(pcie_rc->lut_res.start,
+						fdt_resource_size(&pcie_rc->lut_res),
+						MAP_NOCACHE);
+	}
 
-	ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
+	if (drvdata) {
-				     "ctrl", &pcie_rc->ctrl_res);
+		pcie->ctrl = pcie->lut + drvdata->ctrl_offset;
-	if (!ret)
+	} else {
-		pcie->ctrl = map_physmem(pcie_rc->ctrl_res.start,
+		ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
-					 fdt_resource_size(&pcie_rc->ctrl_res),
+					     "ctrl", &pcie_rc->ctrl_res);
-					 MAP_NOCACHE);
+		if (!ret)
-	if (!pcie->ctrl)
+			pcie->ctrl = map_physmem(pcie_rc->ctrl_res.start,
-		pcie->ctrl = pcie->lut;
+						 fdt_resource_size(&pcie_rc->ctrl_res),
+						 MAP_NOCACHE);
+		if (!pcie->ctrl)
+			pcie->ctrl = pcie->lut;
+	}
 
 	if (!pcie->ctrl) {
 		printf("%s: NOT find CTRL\n", dev->name);
@@ -343,7 +362,10 @@ static int ls_pcie_probe(struct udevice *dev)
 	pcie_rc->cfg1 = pcie_rc->cfg0 +
 			fdt_resource_size(&pcie_rc->cfg_res) / 2;
 
-	pcie->big_endian = fdtdec_get_bool(fdt, node, "big-endian");
+	if (drvdata)
+		pcie->big_endian = drvdata->big_endian;
+	else
+		pcie->big_endian = fdtdec_get_bool(fdt, node, "big-endian");
 
 	debug("%s dbi:%lx lut:%lx ctrl:0x%lx cfg0:0x%lx, big-endian:%d\n",
 	      dev->name, (unsigned long)pcie->dbi, (unsigned long)pcie->lut,
@@ -373,8 +395,15 @@ static const struct dm_pci_ops ls_pcie_ops = {
 	.write_config	= ls_pcie_write_config,
 };
 
+static const struct ls_pcie_drvdata ls1028a_drvdata = {
+	.lut_offset = 0x80000,
+	.ctrl_offset = 0x40000,
+	.big_endian = false,
+};
+
 static const struct udevice_id ls_pcie_ids[] = {
 	{ .compatible = "fsl,ls-pcie" },
+	{ .compatible = "fsl,ls1028a-pcie", .data = (ulong)&ls1028a_drvdata },
 	{ }
 };