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author | Linus Walleij <linus.walleij@linaro.org> | 2011-11-29 15:52:39 +0400 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2012-01-03 12:10:02 +0400 |
commit | 97607d157c133ab18dfcd77fa836e37fa950a44a (patch) | |
tree | f9ac62a9534295f24ab40a2890bfd285bc157a03 /Documentation | |
parent | 542e704f3ffee1dc4539c9e8191e4dc215220f5e (diff) | |
download | linux-97607d157c133ab18dfcd77fa836e37fa950a44a.tar.xz |
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')
-rw-r--r-- | Documentation/pinctrl.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/pinctrl.txt b/Documentation/pinctrl.txt index 3846264c5973..c8fd136eac83 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"), }; |