commit 4acc83d437da7a40e7c2b1874eaba23273ec6bc2
author Simon Glass <sjg@chromium.org> Sun Jan 17 16:11:10 2016 -0700
committer Bin Meng <bmeng.cn@gmail.com> Sun Jan 24 12:07:19 2016 +0800
tree 5ff12c47ee88240dac8878c8da66892f747323f5
parent 7282672d298905088fb3c7c0a049d7d7d31cb8b4

x86: ivybridge: Set up the LPC device using driver model

Find the LPC device in arch_cpu_init_dm() as a first step to converting
this code to use driver model. Probing the LPC will probe its parent (the
PCH) automatically, so make sure that probing the PCH does nothing before
relocation.

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

arch/x86/cpu/ivybridge/bd82x6x.c

diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
index c000aca..72f2ed4 100644
--- a/arch/x86/cpu/ivybridge/bd82x6x.c
+++ b/arch/x86/cpu/ivybridge/bd82x6x.c
@@ -65,6 +65,9 @@
 	int sata_node, gma_node;
 	int ret;
 
+	if (!(gd->flags & GD_FLG_RELOC))
+		return 0;
+
 	hose = pci_bus_to_hose(0);
 	lpc_enable(PCH_LPC_DEV);
 	lpc_init(hose, PCH_LPC_DEV);

arch/x86/cpu/ivybridge/cpu.c

diff --git a/arch/x86/cpu/ivybridge/cpu.c b/arch/x86/cpu/ivybridge/cpu.c
index 343bfb4..6ffc843 100644
--- a/arch/x86/cpu/ivybridge/cpu.c
+++ b/arch/x86/cpu/ivybridge/cpu.c
@@ -126,7 +126,7 @@
 {
 	const void *blob = gd->fdt_blob;
 	struct pci_controller *hose;
-	struct udevice *bus;
+	struct udevice *bus, *dev;
 	int node;
 	int ret;
 
@@ -141,6 +141,10 @@
 	/* TODO(sjg@chromium.org): Get rid of gd->hose */
 	gd->hose = hose;
 
+	ret = uclass_first_device(UCLASS_LPC, &dev);
+	if (!dev)
+		return -ENODEV;
+
 	node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_PCH);
 	if (node < 0)
 		return -ENOENT;

arch/x86/cpu/ivybridge/lpc.c

diff --git a/arch/x86/cpu/ivybridge/lpc.c b/arch/x86/cpu/ivybridge/lpc.c
index af5d4a8..51a4073 100644
--- a/arch/x86/cpu/ivybridge/lpc.c
+++ b/arch/x86/cpu/ivybridge/lpc.c
@@ -559,6 +559,11 @@
 	setbits_le32(RCB_REG(FD2), PCH_ENABLE_DBDF);
 }
 
+static int bd82x6x_lpc_probe(struct udevice *dev)
+{
+	return 0;
+}
+
 static const struct udevice_id bd82x6x_lpc_ids[] = {
 	{ .compatible = "intel,bd82x6x-lpc" },
 	{ }
@@ -568,4 +573,5 @@
 	.name		= "lpc",
 	.id		= UCLASS_LPC,
 	.of_match	= bd82x6x_lpc_ids,
+	.probe		= bd82x6x_lpc_probe,
 };

arch/x86/dts/chromebook_link.dts

diff --git a/arch/x86/dts/chromebook_link.dts b/arch/x86/dts/chromebook_link.dts
index a5c5dc1..d5c5bfd 100644
--- a/arch/x86/dts/chromebook_link.dts
+++ b/arch/x86/dts/chromebook_link.dts
@@ -223,6 +223,7 @@
 				compatible = "intel,bd82x6x-lpc";
 				#address-cells = <1>;
 				#size-cells = <0>;
+				u-boot,dm-pre-reloc;
 				cros-ec@200 {
 					compatible = "google,cros-ec";
 					reg = <0x204 1 0x200 1 0x880 0x80>;