PCI: spear: Pass config resource through reg property

PCIe configuration space should be passed through reg property, rather than
through ranges property.  This patch does the correction for SPEAr13XX
SOCs.
Signed-off-by: NPratyush Anand <pratyush.anand@st.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NMohit Kumar <mohit.kumar@st.com>

arch/arm/boot/dts/spear1310.dtsi

@@ -85,7 +85,8 @@
 
 		pcie0: pcie@b1000000 {
 			compatible = "st,spear1340-pcie", "snps,dw-pcie";
-			reg = <0xb1000000 0x4000>;
+			reg = <0xb1000000 0x4000>, <0x80000000 0x20000>;
+			reg-names = "dbi", "config";
 			interrupts = <0 68 0x4>;
 			interrupt-map-mask = <0 0 0 0>;
 			interrupt-map = <0x0 0 &gic 0 68 0x4>;
@@ -95,15 +96,15 @@
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";
-			ranges = <0x00000800 0 0x80000000 0x80000000 0 0x00020000   /* configuration space */
-				0x81000000 0 0	 0x80020000 0 0x00010000   /* downstream I/O */
+			ranges = <0x81000000 0 0	 0x80020000 0 0x00010000   /* downstream I/O */
 				0x82000000 0 0x80030000 0xc0030000 0 0x0ffd0000>; /* non-prefetchable memory */
 			status = "disabled";
 		};
 
 		pcie1: pcie@b1800000 {
 			compatible = "st,spear1340-pcie", "snps,dw-pcie";
-			reg = <0xb1800000 0x4000>;
+			reg = <0xb1800000 0x4000>, <0x90000000 0x20000>;
+			reg-names = "dbi", "config";
 			interrupts = <0 69 0x4>;
 			interrupt-map-mask = <0 0 0 0>;
 			interrupt-map = <0x0 0 &gic 0 69 0x4>;
@@ -113,15 +114,15 @@
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";
-			ranges = <0x00000800 0 0x90000000 0x90000000 0 0x00020000   /* configuration space */
-				0x81000000 0 0  0x90020000 0 0x00010000   /* downstream I/O */
+			ranges = <0x81000000 0 0  0x90020000 0 0x00010000   /* downstream I/O */
 				0x82000000 0 0x90030000 0x90030000 0 0x0ffd0000>; /* non-prefetchable memory */
 			status = "disabled";
 		};
 
 		pcie2: pcie@b4000000 {
 			compatible = "st,spear1340-pcie", "snps,dw-pcie";
-			reg = <0xb4000000 0x4000>;
+			reg = <0xb4000000 0x4000>, <0xc0000000 0x20000>;
+			reg-names = "dbi", "config";
 			interrupts = <0 70 0x4>;
 			interrupt-map-mask = <0 0 0 0>;
 			interrupt-map = <0x0 0 &gic 0 70 0x4>;
@@ -131,8 +132,7 @@
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";
-			ranges = <0x00000800 0 0xc0000000 0xc0000000 0 0x00020000   /* configuration space */
-				0x81000000 0 0	 0xc0020000 0 0x00010000   /* downstream I/O */
+			ranges = <0x81000000 0 0	 0xc0020000 0 0x00010000   /* downstream I/O */
 				0x82000000 0 0xc0030000 0xc0030000 0 0x0ffd0000>; /* non-prefetchable memory */
 			status = "disabled";
 		};

arch/arm/boot/dts/spear1340.dtsi

@@ -50,7 +50,8 @@
 
 		pcie0: pcie@b1000000 {
 			compatible = "st,spear1340-pcie", "snps,dw-pcie";
-			reg = <0xb1000000 0x4000>;
+			reg = <0xb1000000 0x4000>, <0x80000000 0x20000>;
+			reg-names = "dbi", "config";
 			interrupts = <0 68 0x4>;
 			interrupt-map-mask = <0 0 0 0>;
 			interrupt-map = <0x0 0 &gic 0 68 0x4>;
@@ -60,8 +61,7 @@
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";
-			ranges = <0x00000800 0 0x80000000 0x80000000 0 0x00020000   /* configuration space */
-				0x81000000 0 0	 0x80020000 0 0x00010000   /* downstream I/O */
+			ranges = <0x81000000 0 0	 0x80020000 0 0x00010000   /* downstream I/O */
 				0x82000000 0 0x80030000 0xc0030000 0 0x0ffd0000>; /* non-prefetchable memory */
 			status = "disabled";
 		};

drivers/pci/host/pcie-spear13xx.c

@@ -340,7 +340,7 @@ static int __init spear13xx_pcie_probe(struct platform_device *pdev)
 
 	pp->dev = dev;
 
-	dbi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
 	pp->dbi_base = devm_ioremap_resource(dev, dbi_base);
 	if (IS_ERR(pp->dbi_base)) {
 		dev_err(dev, "couldn't remap dbi base %p\n", dbi_base);