path: root/Documentation/pinctrl.txt
diff options
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')
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",
.ctrl_dev_name = "pinctrl-foo",
.function = "spi0",
.dev_name = "foo-i2c.0",
.ctrl_dev_name = "pinctrl-foo",
.function = "i2c0",
.dev_name = "foo-mmc.0",
.ctrl_dev_name = "pinctrl-foo",
.function = "mmc0",
@@ -944,10 +947,6 @@ foo_remove()
-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.

Privacy Policy