Add a structure 'omapdev' to represent on-chip hardware peripherals.
Currently the only additional information stored are the powerdomains for
each on-chip peripheral, although the long-term intention is to use this
to handle device reset at boot time and to clean up device registration.
Use platform_device name and id fields to link this structure back to the
corresponding platform_device. In the medium- to long-term, it may be best
to use a generic device pointer so system devices can be linked also; but
for now, most cases can be handled via platform_device.
struct omapdev differs in purpose from struct platform_device in that
platform_device is currently used to represent "logical" devices in
the Linux driver model, whereas this struct omapdev is used to
represent physical on-chip devices in the OMAP memory map. An example
is the OMAP2xxx camera driver. It uses only one platform_device,
"omap24xxcam.-1", but on the hardware, that platform_device covers
several independent on-chip devices with their own address space and
control parameters. Other examples of multiple omapdevs per platform_device
include the display subsystem and UARTs.
struct omapdev entries are only for on-chip devices. Off-chip
peripherals are not included in omapdev. So, smc91x and onenand, for example,
will not be included. What belongs in those two cases would be some sort
of GPMC platform_device.
Signed-off-by: Paul Walmsley <paul@xxxxxxxxx>
---
arch/arm/mach-omap2/omapdev-common.h | 27 +++++++++++++++
arch/arm/plat-omap/include/mach/omapdev.h | 51 +++++++++++++++++++++++++++++
2 files changed, 78 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/omapdev-common.h
create mode 100644 arch/arm/plat-omap/include/mach/omapdev.h
diff --git a/arch/arm/mach-omap2/omapdev-common.h b/arch/arm/mach-omap2/omapdev-common.h
new file mode 100644
index 0000000..ce03f3d
--- /dev/null
+++ b/arch/arm/mach-omap2/omapdev-common.h
@@ -0,0 +1,27 @@
+/*
+ * OMAP on-chip devices present on OMAP2/3
+ *
+ * Copyright (C) 2007-2008 Texas Instruments, Inc.
+ * Copyright (C) 2007-2008 Nokia Corporation
+ * Paul Walmsley
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef ARCH_ARM_MACH_OMAP2_OMAPDEV_COMMON_H
+#define ARCH_ARM_MACH_OMAP2_OMAPDEV_COMMON_H
+
+#include <mach/omapdev.h>
+
+#include "omapdev242x.h"
+#include "omapdev243x.h"
+#include "omapdev3xxx.h"
+
+static struct omapdev *omapdevs[] = {
+ NULL,
+};
+
+#endif
diff --git a/arch/arm/plat-omap/include/mach/omapdev.h b/arch/arm/plat-omap/include/mach/omapdev.h
new file mode 100644
index 0000000..ef91f00
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/omapdev.h
@@ -0,0 +1,51 @@
+/*
+ * OMAP on-chip device: structure and function call definitions
+ *
+ * Copyright (C) 2007-2008 Texas Instruments, Inc.
+ * Copyright (C) 2007-2008 Nokia Corporation
+ * Paul Walmsley
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef ARCH_ARM_PLAT_OMAP_OMAPDEV_H
+#define ARCH_ARM_PLAT_OMAP_OMAPDEV_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+#include <mach/cpu.h>
+#include <mach/powerdomain.h>
+
+/**
+ * struct omapdev - OMAP on-chip hardware devices
+ * @name: name of the device - should match TRM
+ * @pwrdm: powerdomain that the device resides in
+ * @omap_chip: OMAP chips this omapdev is valid for
+ * @pdev_name: platform_device name associated with this omapdev (if any)
+ * @pdev_id: platform_device id associated with this omapdev (if any)
+ *
+ */
+struct omapdev {
+
+ const char *name;
+
+ union {
+ const char *name;
+ struct powerdomain *ptr;
+ } pwrdm;
+
+ const struct omap_chip_id omap_chip;
+
+ const char *pdev_name;
+
+ const int pdev_id;
+
+ struct list_head node;
+};
+
+
+
+#endif
--
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