dm: x86: Add a uclass for a Platform Controller Hub

Add a simple uclass for this chip which is often found in x86 systems
where the CPU is a separate device.

The device can have children, so make it scan the device tree for these.

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

diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
index 7b74282a0a02f8ad11575a44ff53a25ac08f663b..ca8cccff94898a76be2af1599d2c9662b05198d3 100644 (file)
--- a/arch/x86/cpu/ivybridge/bd82x6x.c
+++ b/arch/x86/cpu/ivybridge/bd82x6x.c
@@ -157,12 +157,3 @@ U_BOOT_DRIVER(bd82x6x_drv) = {
        .of_match       = bd82x6x_ids,
        .probe          = bd82x6x_probe,
 };
-
-/*
- * TODO(sjg@chromium.org): Move this to arch/x86/lib or similar when other
- * boards also use a PCH
- */
-UCLASS_DRIVER(pch) = {
-       .id             = UCLASS_PCH,
-       .name           = "pch",
-};

diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 67a34d8f56c8448f6011cb5490832709829c8c89..fe022f653306c70d8a0ae27f5320cba3db5481f7 100644 (file)
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_SYS_PCAT_TIMER) += pcat_timer.o
 ifndef CONFIG_DM_PCI
 obj-$(CONFIG_PCI) += pci_type1.o
 endif
+obj-y  += pch-uclass.o
 obj-y  += relocate.o
 obj-y += physmem.o
 obj-$(CONFIG_X86_RAMTEST) += ramtest.o

diff --git a/arch/x86/lib/pch-uclass.c b/arch/x86/lib/pch-uclass.c
new file mode 100644 (file)
index 0000000..d1082e1
--- /dev/null
+++ b/arch/x86/lib/pch-uclass.c
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/root.h>
+
+static int pch_uclass_post_bind(struct udevice *bus)
+{
+       /*
+        * Scan the device tree for devices
+        *
+        * Before relocation, only bind devices marked for pre-relocation
+        * use.
+        */
+       return dm_scan_fdt_node(bus, gd->fdt_blob, bus->of_offset,
+                               gd->flags & GD_FLG_RELOC ? false : true);
+}
+
+UCLASS_DRIVER(pch) = {
+       .id             = UCLASS_PCH,
+       .name           = "pch",
+       .post_bind      = pch_uclass_post_bind,
+};