[U-Boot] [PATCH 06/57] x86: ivybridge: Set up the LPC device using driver model

[Simon Glass]

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 at chromium.org>
---

 arch/x86/cpu/ivybridge/bd82x6x.c | 3 +++
 arch/x86/cpu/ivybridge/cpu.c     | 6 +++++-
 arch/x86/cpu/ivybridge/lpc.c     | 6 ++++++
 arch/x86/dts/chromebook_link.dts | 1 +
 4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
index abd59da..be39bcd 100644
--- a/arch/x86/cpu/ivybridge/bd82x6x.c
+++ b/arch/x86/cpu/ivybridge/bd82x6x.c
@@ -64,6 +64,9 @@ 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 0387444..fd7e1fc 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 at 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 3efd3e8..04a7451 100644
--- a/arch/x86/cpu/ivybridge/lpc.c
+++ b/arch/x86/cpu/ivybridge/lpc.c
@@ -568,6 +568,11 @@ 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" },
 	{ }
@@ -577,4 +582,5 @@ 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 4d158da..7a009db 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 at 200 {
 					compatible = "google,cros-ec";
 					reg = <0x204 1 0x200 1 0x880 0x80>;
-- 
2.6.0.rc2.230.g3dd15c0