From: Simon Glass <sjg@chromium.org>
Date: Sun, 17 Jan 2016 23:11:10 +0000 (-0700)
Subject: x86: ivybridge: Set up the LPC device using driver model
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=4acc83d437da7a40e7c2b1874eaba23273ec6bc2;p=u-boot.git

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>
---

diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
index c000aca856..72f2ed4d71 100644
--- a/arch/x86/cpu/ivybridge/bd82x6x.c
+++ b/arch/x86/cpu/ivybridge/bd82x6x.c
@@ -65,6 +65,9 @@ static int bd82x6x_probe(struct udevice *dev)
 	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);
diff --git a/arch/x86/cpu/ivybridge/cpu.c b/arch/x86/cpu/ivybridge/cpu.c
index 343bfb4e98..6ffc843a86 100644
--- a/arch/x86/cpu/ivybridge/cpu.c
+++ b/arch/x86/cpu/ivybridge/cpu.c
@@ -126,7 +126,7 @@ int arch_cpu_init_dm(void)
 {
 	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 @@ int arch_cpu_init_dm(void)
 	/* 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;
diff --git a/arch/x86/cpu/ivybridge/lpc.c b/arch/x86/cpu/ivybridge/lpc.c
index af5d4a8908..51a407379a 100644
--- a/arch/x86/cpu/ivybridge/lpc.c
+++ b/arch/x86/cpu/ivybridge/lpc.c
@@ -559,6 +559,11 @@ void lpc_enable(pci_dev_t dev)
 	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 @@ U_BOOT_DRIVER(bd82x6x_lpc_drv) = {
 	.name		= "lpc",
 	.id		= UCLASS_LPC,
 	.of_match	= bd82x6x_lpc_ids,
+	.probe		= bd82x6x_lpc_probe,
 };
diff --git a/arch/x86/dts/chromebook_link.dts b/arch/x86/dts/chromebook_link.dts
index a5c5dc126c..d5c5bfdd08 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>;