path: root/Documentation/pinctrl.txt
diff options
authorLinus Walleij <linus.walleij@linaro.org>2011-11-29 11:52:39 (GMT)
committerLinus Walleij <linus.walleij@linaro.org>2012-01-03 08:10:02 (GMT)
commit97607d157c133ab18dfcd77fa836e37fa950a44a (patch)
treef9ac62a9534295f24ab40a2890bfd285bc157a03 /Documentation/pinctrl.txt
parent542e704f3ffee1dc4539c9e8191e4dc215220f5e (diff)
pinctrl: make a copy of pinmux map
This makes a deep copy of the pinmux function map instead of keeping the copy supplied from the platform around. This makes it possible to tag the platforms map with __initdata as is also done as part of this patch. Rationale: a certain target platform (PXA) has numerous pinmux maps, many of which will be lying around unused after boot in a multi-platform binary. Instead, deep-copy the one we're going to use and tag them all __initdata so they go away after boot. ChangeLog v1->v2: - Fixup the deep copy, missed a few items on the struct, plus mark bool member non-const since we're making runtime copies if this stuff now. ChangeLog v2->v3: - Make a shallow copy (just copy the array of map structs) as Arnd noticed, string constants never get discarded by the kernel anyway, so these pointers may be safely copied over. Reviewed-by: Arnd Bergmann <arnd.bergmann@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/pinctrl.txt')
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/pinctrl.txt b/Documentation/pinctrl.txt
index 3846264..c8fd136 100644
--- a/Documentation/pinctrl.txt
+++ b/Documentation/pinctrl.txt
@@ -697,7 +697,7 @@ spi on the second function mapping:
#include <linux/pinctrl/machine.h>
-static const struct pinmux_map pmx_mapping[] = {
+static const struct pinmux_map __initdata pmx_mapping[] = {
.ctrl_dev_name = "pinctrl.0",
.function = "spi0",
@@ -734,7 +734,7 @@ Since the above construct is pretty common there is a helper macro to make
it even more compact which assumes you want to use pinctrl.0 and position
0 for mapping, for example:
-static struct pinmux_map pmx_mapping[] = {
+static struct pinmux_map __initdata pmx_mapping[] = {
PINMUX_MAP_PRIMARY("I2CMAP", "i2c0", "foo-i2c.0"),

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