[U-Boot] [PATCH 6/7] dm: x86: Add a driver for Intel PCH9

[Simon Glass]

At some point we may need to distinguish between different types of PCHs,
but for existing supported platforms we only need to worry about version 7
and version 9 bridges. Add a driver for the PCH9.

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

 drivers/pch/Makefile |  1 +
 drivers/pch/pch9.c   | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 drivers/pch/pch9.c

diff --git a/drivers/pch/Makefile b/drivers/pch/Makefile
index 33aa727..dde9e86 100644
--- a/drivers/pch/Makefile
+++ b/drivers/pch/Makefile
@@ -4,3 +4,4 @@
 
 obj-y += pch-uclass.o
 obj-y += pch7.o
+obj-y += pch9.o
diff --git a/drivers/pch/pch9.c b/drivers/pch/pch9.c
new file mode 100644
index 0000000..2f40a6b
--- /dev/null
+++ b/drivers/pch/pch9.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <pch.h>
+
+static int baytrail_pch_get_sbase(struct udevice *dev, ulong *sbasep)
+{
+	uint32_t sbase_addr;
+
+	dm_pci_read_config32(dev, 0x54, &sbase_addr);
+	*sbasep = sbase_addr & 0xfffffe00;
+
+	return 0;
+}
+
+static int baytrail_pch_get_version(struct udevice *dev)
+{
+	return 9;
+}
+
+static const struct pch_ops baytrail_pch_ops = {
+	.get_sbase	= baytrail_pch_get_sbase,
+	.get_version	= baytrail_pch_get_version,
+};
+
+static const struct udevice_id baytrailpch_ids[] = {
+	{ .compatible = "intel,pch9" },
+	{ }
+};
+
+U_BOOT_DRIVER(pch9_drv) = {
+	.name		= "intel-pch",
+	.id		= UCLASS_PCH,
+	.of_match	= baytrailpch_ids,
+	.ops		= &baytrail_pch_ops,
+};
-- 
2.6.0.rc2.230.g3dd15c0