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

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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>
This commit is contained in:
Simon Glass 2015-03-26 09:29:27 -06:00
parent ba4575626e
commit 452f548753
3 changed files with 29 additions and 9 deletions
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9
arch/x86/cpu/ivybridge/bd82x6x.c
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@ -157,12 +157,3 @@ U_BOOT_DRIVER(bd82x6x_drv) = {
.of_match = bd82x6x_ids, .of_match = bd82x6x_ids,
.probe = bd82x6x_probe, .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",
};

1
arch/x86/lib/Makefile
View file

@ -20,6 +20,7 @@ obj-$(CONFIG_SYS_PCAT_TIMER) += pcat_timer.o
ifndef CONFIG_DM_PCI ifndef CONFIG_DM_PCI
obj-$(CONFIG_PCI) += pci_type1.o obj-$(CONFIG_PCI) += pci_type1.o
endif endif
obj-y += pch-uclass.o
obj-y += relocate.o obj-y += relocate.o
obj-y += physmem.o obj-y += physmem.o
obj-$(CONFIG_X86_RAMTEST) += ramtest.o obj-$(CONFIG_X86_RAMTEST) += ramtest.o

28
arch/x86/lib/pch-uclass.c Normal file
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@ -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,
};