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authorStephen Warren <swarren@nvidia.com>2012-03-02 01:48:33 (GMT)
committerLinus Walleij <linus.walleij@linaro.org>2012-03-02 15:20:54 (GMT)
commit110e4ec5a1cfe20190e7f8c2b8b4eef369de3c99 (patch)
tree2e20b44478f47069ac19f0ef9f5a92bee7576bdd /Documentation/pinctrl.txt
parent46919ae63d4820e76724beb655274ce143f0da0b (diff)
pinctrl: assume map table entries can't have a NULL name field
pinctrl_register_mappings() already requires that every mapping table entry have a non-NULL name field. Logically, this makes sense too; drivers should always request a specific named state so they know what they're getting. Relying on getting the first mentioned state in the mapping table is error-prone, and a nasty special case to implement, given that a given the mapping table may define multiple states for a device. Remove a small part of the documentation that talked about optionally requesting a specific state; it's mandatory now. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Dong Aisheng <dong.aisheng@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/pinctrl.txt')
-rw-r--r--Documentation/pinctrl.txt7
1 files changed, 3 insertions, 4 deletions
diff --git a/Documentation/pinctrl.txt b/Documentation/pinctrl.txt
index 6fe3232..558aac5 100644
--- a/Documentation/pinctrl.txt
+++ b/Documentation/pinctrl.txt
@@ -782,16 +782,19 @@ spi on the second function mapping:
static const struct pinctrl_map __initdata mapping[] = {
{
.dev_name = "foo-spi.0",
+ .name = PINCTRL_STATE_DEFAULT,
.ctrl_dev_name = "pinctrl-foo",
.function = "spi0",
},
{
.dev_name = "foo-i2c.0",
+ .name = PINCTRL_STATE_DEFAULT,
.ctrl_dev_name = "pinctrl-foo",
.function = "i2c0",
},
{
.dev_name = "foo-mmc.0",
+ .name = PINCTRL_STATE_DEFAULT,
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
},
@@ -944,10 +947,6 @@ foo_remove()
pinctrl_put(state->p);
}
-If you want to grab a specific control mapping and not just the first one
-found for this device you can specify a specific mapping name, for example in
-the above example the second i2c0 setting: pinctrl_get(&device, "spi0-pos-B");
-
This get/enable/disable/put sequence can just as well be handled by bus drivers
if you don't want each and every driver to handle it and you know the
arrangement on your bus.

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