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authorPaul Mundt <lethal@linux-sh.org>2010-03-08 07:45:19 -0500
committerPaul Mundt <lethal@linux-sh.org>2010-03-08 21:57:17 -0500
commit51a5006afcd13176276f0935ee57c4cc6f210e83 (patch)
treea5842fabed2ac33ac5b807d5764687babf5787d3 /arch/sh/kernel/cpu/clock.c
parent40d1f0048289b1baed859baee06878417fae540e (diff)
sh: Merge clkdev API updates.
This rolls in the remainder of the clkdev API bits from the ARM tree. This can more or less be used verbatim, so we just copy it over and nuke our local version. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/cpu/clock.c')
-rw-r--r--arch/sh/kernel/cpu/clock.c55
1 files changed, 1 insertions, 54 deletions
diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c
index 83da5debeedf..9ded1bc29260 100644
--- a/arch/sh/kernel/cpu/clock.c
+++ b/arch/sh/kernel/cpu/clock.c
@@ -10,10 +10,6 @@
10 * 10 *
11 * Modified for omap shared clock framework by Tony Lindgren <tony@atomide.com> 11 * Modified for omap shared clock framework by Tony Lindgren <tony@atomide.com>
12 * 12 *
13 * With clkdev bits:
14 *
15 * Copyright (C) 2008 Russell King.
16 *
17 * This file is subject to the terms and conditions of the GNU General Public 13 * This file is subject to the terms and conditions of the GNU General Public
18 * License. See the file "COPYING" in the main directory of this archive 14 * License. See the file "COPYING" in the main directory of this archive
19 * for more details. 15 * for more details.
@@ -30,6 +26,7 @@
30#include <linux/platform_device.h> 26#include <linux/platform_device.h>
31#include <linux/debugfs.h> 27#include <linux/debugfs.h>
32#include <linux/cpufreq.h> 28#include <linux/cpufreq.h>
29#include <linux/clk.h>
33#include <asm/clock.h> 30#include <asm/clock.h>
34#include <asm/machvec.h> 31#include <asm/machvec.h>
35 32
@@ -398,56 +395,6 @@ long clk_round_rate(struct clk *clk, unsigned long rate)
398EXPORT_SYMBOL_GPL(clk_round_rate); 395EXPORT_SYMBOL_GPL(clk_round_rate);
399 396
400/* 397/*
401 * Find the correct struct clk for the device and connection ID.
402 * We do slightly fuzzy matching here:
403 * An entry with a NULL ID is assumed to be a wildcard.
404 * If an entry has a device ID, it must match
405 * If an entry has a connection ID, it must match
406 * Then we take the most specific entry - with the following
407 * order of precidence: dev+con > dev only > con only.
408 */
409static struct clk *clk_find(const char *dev_id, const char *con_id)
410{
411 struct clk_lookup *p;
412 struct clk *clk = NULL;
413 int match, best = 0;
414
415 list_for_each_entry(p, &clock_list, node) {
416 match = 0;
417 if (p->dev_id) {
418 if (!dev_id || strcmp(p->dev_id, dev_id))
419 continue;
420 match += 2;
421 }
422 if (p->con_id) {
423 if (!con_id || strcmp(p->con_id, con_id))
424 continue;
425 match += 1;
426 }
427 if (match == 0)
428 continue;
429
430 if (match > best) {
431 clk = p->clk;
432 best = match;
433 }
434 }
435 return clk;
436}
437
438struct clk *clk_get_sys(const char *dev_id, const char *con_id)
439{
440 struct clk *clk;
441
442 mutex_lock(&clock_list_sem);
443 clk = clk_find(dev_id, con_id);
444 mutex_unlock(&clock_list_sem);
445
446 return clk ? clk : ERR_PTR(-ENOENT);
447}
448EXPORT_SYMBOL_GPL(clk_get_sys);
449
450/*
451 * Returns a clock. Note that we first try to use device id on the bus 398 * Returns a clock. Note that we first try to use device id on the bus
452 * and clock name. If this fails, we try to use clock name only. 399 * and clock name. If this fails, we try to use clock name only.
453 */ 400 */