Author: ian
Date: Sun Oct 26 02:19:03 2014
New Revision: 273657
URL: https://svnweb.freebsd.org/changeset/base/273657
Log:
MFC r270957, r270959:
Create an interface for drivers to enable or disable their clocks as listed
in the clocks=<...> properties of their FDT data.
Added:
stable/10/sys/dev/fdt/fdt_clock.c
- copied, changed from r270957, head/sys/dev/fdt/fdt_clock.c
stable/10/sys/dev/fdt/fdt_clock.h
- copied unchanged from r270957, head/sys/dev/fdt/fdt_clock.h
stable/10/sys/dev/fdt/fdt_clock_if.m
- copied unchanged from r270957, head/sys/dev/fdt/fdt_clock_if.m
Modified:
stable/10/sys/conf/files
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/conf/files
==============================================================================
--- stable/10/sys/conf/files Sun Oct 26 02:09:58 2014 (r273656)
+++ stable/10/sys/conf/files Sun Oct 26 02:19:03 2014 (r273657)
@@ -1371,6 +1371,8 @@ dev/fatm/if_fatm.c optional fatm pci
dev/fb/fbd.c optional fbd | vt
dev/fb/fb_if.m standard
dev/fb/splash.c optional sc splash
+dev/fdt/fdt_clock.c optional fdt
+dev/fdt/fdt_clock_if.m optional fdt
dev/fdt/fdt_common.c optional fdt
dev/fdt/fdt_slicer.c optional fdt cfi | fdt nand
dev/fdt/fdt_static_dtb.S optional fdt fdt_dtb_static \
Copied and modified: stable/10/sys/dev/fdt/fdt_clock.c (from r270957,
head/sys/dev/fdt/fdt_clock.c)
==============================================================================
--- head/sys/dev/fdt/fdt_clock.c Tue Sep 2 03:23:05 2014
(r270957, copy source)
+++ stable/10/sys/dev/fdt/fdt_clock.c Sun Oct 26 02:19:03 2014
(r273657)
@@ -32,6 +32,7 @@
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/queue.h>
+#include <sys/systm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
@@ -119,7 +120,7 @@ fdt_clock_get_info(device_t consumer, in
* override anything it wants to).
*/
clocknum = clks[n + 1];
- memset(info, 0, sizeof(*info));
+ bzero(info, sizeof(*info));
info->provider = clockdev;
info->index = clocknum;
info->name = "";
@@ -148,13 +149,13 @@ void
fdt_clock_register_provider(device_t provider)
{
- OF_device_register_xref(OF_xref_from_node(provider), provider);
+ OF_device_register_xref(OF_xref_from_device(provider), provider);
}
void
fdt_clock_unregister_provider(device_t provider)
{
- OF_device_register_xref(OF_xref_from_node(provider), NULL);
+ OF_device_register_xref(OF_xref_from_device(provider), NULL);
}
Copied: stable/10/sys/dev/fdt/fdt_clock.h (from r270957,
head/sys/dev/fdt/fdt_clock.h)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/sys/dev/fdt/fdt_clock.h Sun Oct 26 02:19:03 2014
(r273657, copy of r270957, head/sys/dev/fdt/fdt_clock.h)
@@ -0,0 +1,55 @@
+/*-
+ * Copyright (c) 2014 Ian Lepore <[email protected]>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef DEV_FDT_CLOCK_H
+#define DEV_FDT_CLOCK_H
+
+#include "fdt_clock_if.h"
+
+/*
+ * Get info about the Nth clock listed in consumer's "clocks" property.
+ *
+ * Returns 0 on success, ENXIO if clock #n not found.
+ */
+int fdt_clock_get_info(device_t consumer, int n, struct fdt_clock_info *info);
+
+/*
+ * Look up "clocks" property in consumer's fdt data and enable or disable all
+ * configured clocks.
+ */
+int fdt_clock_enable_all(device_t consumer);
+int fdt_clock_disable_all(device_t consumer);
+
+/*
+ * [Un]register the given device instance as a driver that implements the
+ * fdt_clock interface.
+ */
+void fdt_clock_register_provider(device_t provider);
+void fdt_clock_unregister_provider(device_t provider);
+
+#endif /* DEV_FDT_CLOCK_H */
+
Copied: stable/10/sys/dev/fdt/fdt_clock_if.m (from r270957,
head/sys/dev/fdt/fdt_clock_if.m)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/sys/dev/fdt/fdt_clock_if.m Sun Oct 26 02:19:03 2014
(r273657, copy of r270957, head/sys/dev/fdt/fdt_clock_if.m)
@@ -0,0 +1,81 @@
+#-
+# Copyright (c) 2014 Ian Lepore
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+#include <sys/types.h>
+
+#
+# This is the interface that fdt_clock drivers provide to other drivers.
+# In this context, clock refers to a clock signal provided to some other
+# hardware component within the system. They are most often found within
+# embedded processors that have on-chip IO controllers.
+#
+
+INTERFACE fdt_clock;
+
+HEADER {
+
+ enum {
+ FDT_CIFLAG_RUNNING = 0x01,
+ };
+
+ struct fdt_clock_info {
+ device_t provider;
+ uint32_t index;
+ const char * name; /* May be "", will not be NULL. */
+ uint32_t flags;
+ uint64_t frequency; /* In Hz. */
+ };
+}
+
+#
+# Enable the specified clock.
+# Returns 0 on success or a standard errno value.
+#
+METHOD int enable {
+ device_t provider;
+ int index;
+};
+
+#
+# Disable the specified clock.
+# Returns 0 on success or a standard errno value.
+#
+METHOD int disable {
+ device_t provider;
+ int index;
+};
+
+#
+# Returns information about the current operational state of specified clock.
+#
+METHOD int get_info {
+ device_t provider;
+ int index;
+ struct fdt_clock_info *info;
+};
+
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