Module Name: src Committed By: bouyer Date: Sun Apr 1 21:11:01 UTC 2018
Modified Files: src/sys/dev/clk: clk.c clk.h clk_backend.h Log Message: As discussed on tech-kern@ 10 days ago, add a clk_round_rate() method, which returns the rate that would be used by this clock if clk_set_rate() was called. Used by drivers (or other clocks) which have their own divider and need to know the parent's clock capabilities to compute the best parameters. To generate a diff of this commit: cvs rdiff -u -r1.2 -r1.3 src/sys/dev/clk/clk.c src/sys/dev/clk/clk.h \ src/sys/dev/clk/clk_backend.h Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/sys/dev/clk/clk.c diff -u src/sys/dev/clk/clk.c:1.2 src/sys/dev/clk/clk.c:1.3 --- src/sys/dev/clk/clk.c:1.2 Sun Apr 16 12:28:21 2017 +++ src/sys/dev/clk/clk.c Sun Apr 1 21:11:01 2018 @@ -1,4 +1,4 @@ -/* $NetBSD: clk.c,v 1.2 2017/04/16 12:28:21 jmcneill Exp $ */ +/* $NetBSD: clk.c,v 1.3 2018/04/01 21:11:01 bouyer Exp $ */ /*- * Copyright (c) 2015 Jared D. McNeill <jmcne...@invisible.ca> @@ -27,7 +27,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: clk.c,v 1.2 2017/04/16 12:28:21 jmcneill Exp $"); +__KERNEL_RCSID(0, "$NetBSD: clk.c,v 1.3 2018/04/01 21:11:01 bouyer Exp $"); #include <sys/param.h> @@ -65,6 +65,16 @@ clk_set_rate(struct clk *clk, u_int rate } } +u_int +clk_round_rate(struct clk *clk, u_int rate) +{ + if (clk->domain->funcs->round_rate) { + return clk->domain->funcs->round_rate(clk->domain->priv, + clk, rate); + } + return 0; +} + int clk_enable(struct clk *clk) { Index: src/sys/dev/clk/clk.h diff -u src/sys/dev/clk/clk.h:1.2 src/sys/dev/clk/clk.h:1.3 --- src/sys/dev/clk/clk.h:1.2 Sun Apr 16 12:28:21 2017 +++ src/sys/dev/clk/clk.h Sun Apr 1 21:11:01 2018 @@ -1,4 +1,4 @@ -/* $NetBSD: clk.h,v 1.2 2017/04/16 12:28:21 jmcneill Exp $ */ +/* $NetBSD: clk.h,v 1.3 2018/04/01 21:11:01 bouyer Exp $ */ /*- * Copyright (c) 2015 Jared D. McNeill <jmcne...@invisible.ca> @@ -36,6 +36,7 @@ struct clk * clk_get(struct clk_domain * void clk_put(struct clk *); u_int clk_get_rate(struct clk *); int clk_set_rate(struct clk *, u_int); +u_int clk_round_rate(struct clk *, u_int); int clk_enable(struct clk *); int clk_disable(struct clk *); int clk_set_parent(struct clk *, struct clk *); Index: src/sys/dev/clk/clk_backend.h diff -u src/sys/dev/clk/clk_backend.h:1.2 src/sys/dev/clk/clk_backend.h:1.3 --- src/sys/dev/clk/clk_backend.h:1.2 Sun Apr 16 12:28:21 2017 +++ src/sys/dev/clk/clk_backend.h Sun Apr 1 21:11:01 2018 @@ -1,4 +1,4 @@ -/* $NetBSD: clk_backend.h,v 1.2 2017/04/16 12:28:21 jmcneill Exp $ */ +/* $NetBSD: clk_backend.h,v 1.3 2018/04/01 21:11:01 bouyer Exp $ */ /*- * Copyright (c) 2015 Jared D. McNeill <jmcne...@invisible.ca> @@ -49,6 +49,7 @@ struct clk_funcs { u_int (*get_rate)(void *, struct clk *); int (*set_rate)(void *, struct clk *, u_int); + u_int (*round_rate)(void *, struct clk *, u_int); int (*enable)(void *, struct clk *); int (*disable)(void *, struct clk *); int (*set_parent)(void *, struct clk *, struct clk *);