x86: chromebook_link: dts: Add PCH and LPC devices

The PCH (Platform Controller Hub) is on the PCI bus, so show it as such.
The LPC (Low Pin Count) and SPI bus are inside the PCH, so put these in the
right place also.

Rename the compatible strings to be more descriptive since this board is the
only user. Once we are using driver model fully on x86, these will be
dropped.

Signed-off-by: Simon Glass <sjg@chromium.org>

arch/x86/cpu/ivybridge/cpu.c

@@ -142,7 +142,7 @@ int arch_cpu_init_dm(void)
 	/* TODO(sjg@chromium.org): Get rid of gd->hose */
 	gd->hose = hose;
 
-	node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_LPC);
+	node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_PCH);
 	if (node < 0)
 		return -ENOENT;
 	ret = lpc_early_init(gd->fdt_blob, node, PCH_LPC_DEV);

arch/x86/cpu/ivybridge/lpc.c

@@ -510,7 +510,7 @@ int lpc_init(struct pci_controller *hose, pci_dev_t dev)
 	pci_write_bar32(hose, dev, 3, 0x800);
 	pci_write_bar32(hose, dev, 4, 0x900);
 
-	node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_LPC);
+	node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_PCH);
 	if (node < 0)
 		return -ENOENT;
 
@@ -568,3 +568,14 @@ void lpc_enable(pci_dev_t dev)
 	writew(0x0010, RCB_REG(DISPBDF));
 	setbits_le32(RCB_REG(FD2), PCH_ENABLE_DBDF);
 }
+
+static const struct udevice_id bd82x6x_lpc_ids[] = {
+	{ .compatible = "intel,bd82x6x-lpc" },
+	{ }
+};
+
+U_BOOT_DRIVER(bd82x6x_lpc_drv) = {
+	.name		= "lpc",
+	.id		= UCLASS_LPC,
+	.of_match	= bd82x6x_lpc_ids,
+};

arch/x86/dts/chromebook_link.dts

@@ -8,7 +8,7 @@
 	compatible = "google,link", "intel,celeron-ivybridge";
 
 	aliases {
-		spi0 = "/spi";
+		spi0 = "/pci/pch/spi";
 	};
 
 	config {
@@ -151,26 +151,6 @@
 		};
 	};
 
-	spi {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		compatible = "intel,ich-spi";
-		spi-flash@0 {
-			#size-cells = <1>;
-			#address-cells = <1>;
-			reg = <0>;
-			compatible = "winbond,w25q64", "spi-flash";
-			memory-map = <0xff800000 0x00800000>;
-			rw-mrc-cache {
-				label = "rw-mrc-cache";
-				/* Alignment: 4k (for updating) */
-				reg = <0x003e0000 0x00010000>;
-				type = "wiped";
-				wipe-value = [ff];
-			};
-		};
-	};
-
 	pci {
 		compatible = "intel,pci-ivybridge", "pci-x86";
 		#address-cells = <3>;
@@ -199,9 +179,10 @@
 			intel,pch-backlight = <0x04000000>;
 		};
 
-		lpc {
+		pch {
 			reg = <0x0000f800 0 0 0 0>;
 			compatible = "intel,bd82x6x";
+			u-boot,dm-pre-reloc;
 			#address-cells = <1>;
 			#size-cells = <1>;
 			gen-dec = <0x800 0xfc 0x900 0xfc>;
@@ -212,17 +193,44 @@
 						1 0 0 0 0 0 0 0>;
 			/* Enable EC SMI source */
 			intel,alt-gp-smi-enable = <0x0100>;
+			spi {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "intel,ich-spi";
+				spi-flash@0 {
+					#size-cells = <1>;
+					#address-cells = <1>;
+					reg = <0>;
+					compatible = "winbond,w25q64",
+							"spi-flash";
+					memory-map = <0xff800000 0x00800000>;
+					rw-mrc-cache {
+						label = "rw-mrc-cache";
+						reg = <0x003e0000 0x00010000>;
+						type = "wiped";
+						wipe-value = [ff];
+					};
+				};
+			};
 
-			cros-ec@200 {
-				compatible = "google,cros-ec";
-				reg = <0x204 1 0x200 1 0x880 0x80>;
-
-				/* Describes the flash memory within the EC */
+			lpc {
+				compatible = "intel,bd82x6x-lpc";
 				#address-cells = <1>;
-				#size-cells = <1>;
-				flash@8000000 {
-					reg = <0x08000000 0x20000>;
-					erase-value = <0xff>;
+				#size-cells = <0>;
+				cros-ec@200 {
+					compatible = "google,cros-ec";
+					reg = <0x204 1 0x200 1 0x880 0x80>;
+
+					/*
+					 * Describes the flash memory within
+					 * the EC
+					 */
+					#address-cells = <1>;
+					#size-cells = <1>;
+					flash@8000000 {
+						reg = <0x08000000 0x20000>;
+						erase-value = <0xff>;
+					};
 				};
 			};
 		};

include/fdtdec.h

@@ -169,6 +169,7 @@ enum fdt_compat_id {
 	COMPAT_INTEL_ICH_SPI,		/* Intel ICH7/9 SPI controller */
 	COMPAT_INTEL_QRK_MRC,		/* Intel Quark MRC */
 	COMPAT_SOCIONEXT_XHCI,		/* Socionext UniPhier xHCI */
+	COMPAT_INTEL_PCH,		/* Intel PCH */
 
 	COMPAT_COUNT,
 };

lib/fdtdec.c

@@ -67,7 +67,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
 	COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"),
 	COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
 	COMPAT(PARADE_PS8625, "parade,ps8625"),
-	COMPAT(COMPAT_INTEL_LPC, "intel,bd82x6x"),
+	COMPAT(COMPAT_INTEL_LPC, "intel,bd82x6x-lpc"),
 	COMPAT(INTEL_MICROCODE, "intel,microcode"),
 	COMPAT(MEMORY_SPD, "memory-spd"),
 	COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
@@ -77,6 +77,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
 	COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
 	COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
 	COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
+	COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
 };
 
 const char *fdtdec_get_compatible(enum fdt_compat_id id)