x86: ivybridge: Move lpc_early_init() to probe()

Move this code to the LPC's probe() method so that it will happen
automatically when the LPC is probed before relocation.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/cpu/ivybridge/cpu.c

@@ -124,10 +124,8 @@ int arch_cpu_init(void)
 
 int arch_cpu_init_dm(void)
 {
-	const void *blob = gd->fdt_blob;
 	struct pci_controller *hose;
 	struct udevice *bus, *dev;
-	int node;
 	int ret;
 
 	post_code(0x70);
@@ -145,13 +143,6 @@ int arch_cpu_init_dm(void)
 	if (!dev)
 		return -ENODEV;
 
-	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);
-	if (ret)
-		return ret;
-
 	enable_spi_prefetch(hose, PCH_LPC_DEV);
 
 	/* This is already done in start.S, but let's do it in C */

arch/x86/cpu/ivybridge/lpc.c

@@ -454,7 +454,13 @@ static void pch_fixups(pci_dev_t dev)
 	setbits_le32(RCB_REG(0x21a8), 0x3);
 }
 
-int lpc_early_init(const void *blob, int node, pci_dev_t dev)
+/**
+ * lpc_early_init() - set up LPC serial ports and other early things
+ *
+ * @dev:	LPC device
+ * @return 0 if OK, -ve on error
+ */
+static int lpc_early_init(struct udevice *dev)
 {
 	struct reg_info {
 		u32 base;
@@ -463,17 +469,18 @@ int lpc_early_init(const void *blob, int node, pci_dev_t dev)
 	int count;
 	int i;
 
-	count = fdtdec_get_int_array_count(blob, node, "intel,gen-dec",
-			(u32 *)values, sizeof(values) / sizeof(u32));
+	count = fdtdec_get_int_array_count(gd->fdt_blob, dev->of_offset,
+			"intel,gen-dec", (u32 *)values,
+			sizeof(values) / sizeof(u32));
 	if (count < 0)
 		return -EINVAL;
 
 	/* Set COM1/COM2 decode range */
-	x86_pci_write_config16(dev, LPC_IO_DEC, 0x0010);
+	dm_pci_write_config16(dev->parent, LPC_IO_DEC, 0x0010);
 
 	/* Enable PS/2 Keyboard/Mouse, EC areas and COM1 */
-	x86_pci_write_config16(dev, LPC_EN, KBC_LPC_EN | MC_LPC_EN |
-			   GAMEL_LPC_EN | COMA_LPC_EN);
+	dm_pci_write_config16(dev->parent, LPC_EN, KBC_LPC_EN | MC_LPC_EN |
+			      GAMEL_LPC_EN | COMA_LPC_EN);
 
 	/* Write all registers but use 0 if we run out of data */
 	count = count * sizeof(u32) / sizeof(values[0]);
@@ -482,7 +489,7 @@ int lpc_early_init(const void *blob, int node, pci_dev_t dev)
 
 		if (i < count)
 			reg = ptr->base | PCI_COMMAND_IO | (ptr->size << 16);
-		x86_pci_write_config32(dev, LPC_GENX_DEC(i), reg);
+		dm_pci_write_config32(dev->parent, LPC_GENX_DEC(i), reg);
 	}
 
 	return 0;
@@ -561,6 +568,17 @@ void lpc_enable(pci_dev_t dev)
 
 static int bd82x6x_lpc_probe(struct udevice *dev)
 {
+	int ret;
+
+	if (gd->flags & GD_FLG_RELOC)
+		return 0;
+
+	ret = lpc_early_init(dev);
+	if (ret) {
+		debug("%s: lpc_early_init() failed\n", __func__);
+		return ret;
+	}
+
 	return 0;
 }
 

arch/x86/dts/chromebook_link.dts

@@ -192,8 +192,6 @@
 			u-boot,dm-pre-reloc;
 			#address-cells = <1>;
 			#size-cells = <1>;
-			gen-dec = <0x800 0xfc 0x900 0xfc>;
-			intel,gen-dec = <0x800 0xfc 0x900 0xfc>;
 			intel,pirq-routing = <0x8b 0x8a 0x8b 0x8b
 						0x80 0x80 0x80 0x80>;
 			intel,gpi-routing = <0 0 0 0 0 0 0 2
@@ -224,6 +222,7 @@
 				#address-cells = <1>;
 				#size-cells = <0>;
 				u-boot,dm-pre-reloc;
+				intel,gen-dec = <0x800 0xfc 0x900 0xfc>;
 				cros-ec@200 {
 					compatible = "google,cros-ec";
 					reg = <0x204 1 0x200 1 0x880 0x80>;

arch/x86/include/asm/arch-ivybridge/pch.h

@@ -473,14 +473,4 @@ void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue);
 int lpc_init(struct pci_controller *hose, pci_dev_t dev);
 void lpc_enable(pci_dev_t dev);
 
-/**
- * lpc_early_init() - set up LPC serial ports and other early things
- *
- * @blob:	Device tree blob
- * @node:	Offset of LPC node
- * @dev:	PCH PCI device containing the LPC
- * @return 0 if OK, -ve on error
- */
-int lpc_early_init(const void *blob, int node, pci_dev_t dev);
-
 #endif