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authorSimon Glass <sjg@chromium.org>2016-01-18 20:19:17 -0700
committerBin Meng <bmeng.cn@gmail.com>2016-01-24 12:07:17 +0800
commitca831f4933dc68d9ed1b6399cbda90068c520005 (patch)
tree75ec489ccb306d227deddc0a6b7bfb2992dbdf4e /drivers/pch
parent4439bc35aab0e7fc3126cf3914af09dbf85ad2ae (diff)
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dm: Expand the uclass for Platform Controller Hubs (PCH)
A Platform Controller Hub is an Intel concept - it is like the peripherals on an SoC and is often in a separate chip from the CPU. The chip is typically found on the first PCI bus and integrates multiple devices. We have a very simple uclass to support PCHs. Add a few operations, such as setting up the devices on the PCH and finding the SPI controller base address. Also move it into drivers/pch/ since we will be adding a few PCH drivers. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/pch')
-rw-r--r--drivers/pch/Makefile5
-rw-r--r--drivers/pch/pch-uclass.c62
2 files changed, 67 insertions, 0 deletions
diff --git a/drivers/pch/Makefile b/drivers/pch/Makefile
new file mode 100644
index 0000000..d69a99c
--- /dev/null
+++ b/drivers/pch/Makefile
@@ -0,0 +1,5 @@
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-y += pch-uclass.o
diff --git a/drivers/pch/pch-uclass.c b/drivers/pch/pch-uclass.c
new file mode 100644
index 0000000..4579ed1
--- /dev/null
+++ b/drivers/pch/pch-uclass.c
@@ -0,0 +1,62 @@
+/*
+ * 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 <pch.h>
+#include <dm/root.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int pch_get_sbase(struct udevice *dev, ulong *sbasep)
+{
+ struct pch_ops *ops = pch_get_ops(dev);
+
+ *sbasep = 0;
+ if (!ops->get_sbase)
+ return -ENOSYS;
+
+ return ops->get_sbase(dev, sbasep);
+}
+
+enum pch_version pch_get_version(struct udevice *dev)
+{
+ struct pch_ops *ops = pch_get_ops(dev);
+
+ if (!ops->get_version)
+ return -ENOSYS;
+
+ return ops->get_version(dev);
+}
+
+int pch_set_spi_protect(struct udevice *dev, bool protect)
+{
+ struct pch_ops *ops = pch_get_ops(dev);
+
+ if (!ops->set_spi_protect)
+ return -ENOSYS;
+
+ return ops->set_spi_protect(dev, protect);
+}
+
+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,
+};