[src/trunk]: src/sys Add basic clock device infrastructure.

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/5da40362bac1
branches:  trunk
changeset: 342084:5da40362bac1
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sat Dec 05 13:31:07 2015 +0000

description:
Add basic clock device infrastructure.

diffstat:

 sys/conf/files            |    7 ++-
 sys/dev/clk/clk.c         |  105 ++++++++++++++++++++++++++++++++++++++++++++++
 sys/dev/clk/clk.h         |   43 ++++++++++++++++++
 sys/dev/clk/clk_backend.h |   54 +++++++++++++++++++++++
 sys/dev/clk/files.clk     |    4 +
 5 files changed, 212 insertions(+), 1 deletions(-)

diffs (240 lines):

diff -r 449c762bb09f -r 5da40362bac1 sys/conf/files
--- a/sys/conf/files    Sat Dec 05 08:11:42 2015 +0000
+++ b/sys/conf/files    Sat Dec 05 13:31:07 2015 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files,v 1.1150 2015/09/04 06:10:47 uebayasi Exp $
+#      $NetBSD: files,v 1.1151 2015/12/05 13:31:07 jmcneill Exp $
 #      @(#)files.newconf       7.5 (Berkeley) 5/10/93
 
 version        20150846
@@ -1565,3 +1565,8 @@
 # athn
 #
 include "dev/ic/files.athn"
+
+#
+# MI clk api
+#
+include "dev/clk/files.clk"
diff -r 449c762bb09f -r 5da40362bac1 sys/dev/clk/clk.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/clk/clk.c Sat Dec 05 13:31:07 2015 +0000
@@ -0,0 +1,105 @@
+/* $NetBSD: clk.c,v 1.1 2015/12/05 13:31:07 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: clk.c,v 1.1 2015/12/05 13:31:07 jmcneill Exp $");
+
+#include <sys/param.h>
+
+#include <dev/clk/clk.h>
+#include <dev/clk/clk_backend.h>
+
+static const char *clk_backend = NULL;
+static const struct clk_funcs *clk_funcs = NULL;
+static void *clk_priv = NULL;
+
+int
+clk_backend_register(const char *name, const struct clk_funcs *funcs, void *priv)
+{
+       KASSERT(clk_funcs == NULL);
+
+       clk_backend = name;
+       clk_funcs = funcs;
+       clk_priv = priv;
+
+       return 0;
+}
+
+struct clk *
+clk_get(const char *name)
+{
+       if (clk_funcs == NULL)
+               return NULL;
+       return clk_funcs->get(clk_priv, name);
+}
+
+void
+clk_put(struct clk *clk)
+{
+       return clk_funcs->put(clk_priv, clk);
+}
+
+u_int
+clk_get_rate(struct clk *clk)
+{
+       return clk_funcs->get_rate(clk_priv, clk);
+}
+
+int
+clk_set_rate(struct clk *clk, u_int rate)
+{
+       if (clk->flags & CLK_SET_RATE_PARENT) {
+               return clk_set_rate(clk_get_parent(clk), rate);
+       } else {
+               return clk_funcs->set_rate(clk_priv, clk, rate);
+       }
+}
+
+int
+clk_enable(struct clk *clk)
+{
+       return clk_funcs->enable(clk_priv, clk);
+}
+
+int
+clk_disable(struct clk *clk)
+{
+       return clk_funcs->disable(clk_priv, clk);
+}
+
+int
+clk_set_parent(struct clk *clk, struct clk *parent_clk)
+{
+       return clk_funcs->set_parent(clk_priv, clk, parent_clk);
+}
+
+struct clk *
+clk_get_parent(struct clk *clk)
+{
+       return clk_funcs->get_parent(clk_priv, clk);
+}
diff -r 449c762bb09f -r 5da40362bac1 sys/dev/clk/clk.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/clk/clk.h Sat Dec 05 13:31:07 2015 +0000
@@ -0,0 +1,43 @@
+/* $NetBSD: clk.h,v 1.1 2015/12/05 13:31:07 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
+ * 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.
+ */
+
+#ifndef _DEV_CLK_CLK_H
+#define _DEV_CLK_CLK_H
+
+struct clk;
+
+struct clk *   clk_get(const char *);
+void           clk_put(struct clk *);
+u_int          clk_get_rate(struct clk *);
+int            clk_set_rate(struct clk *, u_int);
+int            clk_enable(struct clk *);
+int            clk_disable(struct clk *);
+int            clk_set_parent(struct clk *, struct clk *);
+struct clk *   clk_get_parent(struct clk *);
+
+#endif /* _DEV_CLK_CLK_H */
diff -r 449c762bb09f -r 5da40362bac1 sys/dev/clk/clk_backend.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/clk/clk_backend.h Sat Dec 05 13:31:07 2015 +0000
@@ -0,0 +1,54 @@
+/* $NetBSD: clk_backend.h,v 1.1 2015/12/05 13:31:07 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
+ * 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.
+ */
+
+#ifndef _DEV_CLK_CLK_BACKEND_H
+#define _DEV_CLK_CLK_BACKEND_H
+
+#include <dev/clk/clk.h>
+
+struct clk {
+        const char *name;
+        u_int flags;
+#define CLK_SET_RATE_PARENT     0x01
+};
+
+struct clk_funcs {
+       struct clk *(*get)(void *, const char *);
+       void (*put)(void *, struct clk *);
+
+       u_int (*get_rate)(void *, struct clk *);
+       int (*set_rate)(void *, struct clk *, u_int);
+       int (*enable)(void *, struct clk *);
+       int (*disable)(void *, struct clk *);
+       int (*set_parent)(void *, struct clk *, struct clk *);
+       struct clk *(*get_parent)(void *, struct clk *);
+};
+
+int    clk_backend_register(const char *, const struct clk_funcs *, void *);
+
+#endif /* _DEV_CLK_CLK_BACKEND_H */
diff -r 449c762bb09f -r 5da40362bac1 sys/dev/clk/files.clk
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/clk/files.clk     Sat Dec 05 13:31:07 2015 +0000
@@ -0,0 +1,4 @@
+# $NetBSD: files.clk,v 1.1 2015/12/05 13:31:07 jmcneill Exp $
+
+define clk
+file   dev/clk/clk.c                   clk