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authorLinus Torvalds <torvalds@linux-foundation.org>2012-09-22 15:40:16 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-09-22 15:40:16 -0400
commitb3a297d15b8f1be8304f0e0a3bbbb47b5f019939 (patch)
tree6f2b69a86bf55ba0ef2ff6b30f647965377c8d3e /drivers
parentcead24c1181ad199354bd08013d0f9d08b66691b (diff)
parentbf619faeced5c2beb32a39559e1f1117f88fd702 (diff)
Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM and clkdev fixes from Russell King: "Two patches for clkdev which resolve the long standing issue that the devm_* versions were dependent on clkdev, which they shouldn't have been. Instead, they're dependent on HAVE_CLK instead, which implies that you're providing clk_get() and clk_put(). A small fix to the ARM decompressor to ensure that the page tables are properly interpreted by the CPU, and reserve syscall 378 for kcmp (the checksyscalls.sh script is unfortunately currently broken so arch maintainers aren't getting notified of new syscalls...) Lastly, a larger fix for an issue between the common clk subsystem and smp_twd which causes warnings to be spat out." * 'fixes' of git://git.linaro.org/people/rmk/linux-arm: ARM: reserve syscall 378 for kcmp ARM: 7535/1: Reprogram smp_twd based on new common clk framework notifiers ARM: 7537/1: clk: Fix release in devm_clk_put() ARM: 7532/1: decompressor: reset SCTLR.TRE for VMSA ARMv7 cores ARM: 7534/1: clk: Make the managed clk functions generically available
Diffstat (limited to 'drivers')
-rw-r--r--drivers/clk/Makefile1
-rw-r--r--drivers/clk/clk-devres.c55
-rw-r--r--drivers/clk/clkdev.c45
3 files changed, 56 insertions, 45 deletions
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 5869ea387054..72ce247a0e8d 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -1,4 +1,5 @@
1# common clock types 1# common clock types
2obj-$(CONFIG_HAVE_CLK) += clk-devres.o
2obj-$(CONFIG_CLKDEV_LOOKUP) += clkdev.o 3obj-$(CONFIG_CLKDEV_LOOKUP) += clkdev.o
3obj-$(CONFIG_COMMON_CLK) += clk.o clk-fixed-rate.o clk-gate.o \ 4obj-$(CONFIG_COMMON_CLK) += clk.o clk-fixed-rate.o clk-gate.o \
4 clk-mux.o clk-divider.o clk-fixed-factor.o 5 clk-mux.o clk-divider.o clk-fixed-factor.o
diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
new file mode 100644
index 000000000000..8f571548870f
--- /dev/null
+++ b/drivers/clk/clk-devres.c
@@ -0,0 +1,55 @@
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License version 2 as
4 * published by the Free Software Foundation.
5 */
6
7#include <linux/clk.h>
8#include <linux/device.h>
9#include <linux/export.h>
10#include <linux/gfp.h>
11
12static void devm_clk_release(struct device *dev, void *res)
13{
14 clk_put(*(struct clk **)res);
15}
16
17struct clk *devm_clk_get(struct device *dev, const char *id)
18{
19 struct clk **ptr, *clk;
20
21 ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
22 if (!ptr)
23 return ERR_PTR(-ENOMEM);
24
25 clk = clk_get(dev, id);
26 if (!IS_ERR(clk)) {
27 *ptr = clk;
28 devres_add(dev, ptr);
29 } else {
30 devres_free(ptr);
31 }
32
33 return clk;
34}
35EXPORT_SYMBOL(devm_clk_get);
36
37static int devm_clk_match(struct device *dev, void *res, void *data)
38{
39 struct clk **c = res;
40 if (!c || !*c) {
41 WARN_ON(!c || !*c);
42 return 0;
43 }
44 return *c == data;
45}
46
47void devm_clk_put(struct device *dev, struct clk *clk)
48{
49 int ret;
50
51 ret = devres_release(dev, devm_clk_release, devm_clk_match, clk);
52
53 WARN_ON(ret);
54}
55EXPORT_SYMBOL(devm_clk_put);
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index d423c9bdd71a..442a31363873 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -171,51 +171,6 @@ void clk_put(struct clk *clk)
171} 171}
172EXPORT_SYMBOL(clk_put); 172EXPORT_SYMBOL(clk_put);
173 173
174static void devm_clk_release(struct device *dev, void *res)
175{
176 clk_put(*(struct clk **)res);
177}
178
179struct clk *devm_clk_get(struct device *dev, const char *id)
180{
181 struct clk **ptr, *clk;
182
183 ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
184 if (!ptr)
185 return ERR_PTR(-ENOMEM);
186
187 clk = clk_get(dev, id);
188 if (!IS_ERR(clk)) {
189 *ptr = clk;
190 devres_add(dev, ptr);
191 } else {
192 devres_free(ptr);
193 }
194
195 return clk;
196}
197EXPORT_SYMBOL(devm_clk_get);
198
199static int devm_clk_match(struct device *dev, void *res, void *data)
200{
201 struct clk **c = res;
202 if (!c || !*c) {
203 WARN_ON(!c || !*c);
204 return 0;
205 }
206 return *c == data;
207}
208
209void devm_clk_put(struct device *dev, struct clk *clk)
210{
211 int ret;
212
213 ret = devres_destroy(dev, devm_clk_release, devm_clk_match, clk);
214
215 WARN_ON(ret);
216}
217EXPORT_SYMBOL(devm_clk_put);
218
219void clkdev_add(struct clk_lookup *cl) 174void clkdev_add(struct clk_lookup *cl)
220{ 175{
221 mutex_lock(&clocks_mutex); 176 mutex_lock(&clocks_mutex);