diff options
| author | Manjunathappa, Prakash <prakash.pm@ti.com> | 2013-05-21 10:08:00 -0400 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-06-16 05:56:52 -0400 |
| commit | 4e7e8017a80e1810100c9b416b86e3baef900285 (patch) | |
| tree | 98f812edd3f0c787a5ac04c6b0304dce5bffd00f /Documentation | |
| parent | ac844b62713045557c834c8d5fe2863b8bbaf124 (diff) | |
pinctrl: pinctrl-single: enhance to configure multiple pins of different modules
Add support to configure multiple pins in each register, existing
implementation added by [1] does not support full fledge multiple pin
configuration in single register, reports a pin clash when different
modules configure different bits of same register. The issue reported
and discussed here
http://www.spinics.net/lists/arm-kernel/msg235213.html
With pinctrl-single,bits-per-mux property specified, use function-mask
property to find out number pins to configure. Allocate and register
pin control functions based sub mask.
Tested on da850/omap-l138 EVM.
does not support variable submask for pins.
does not support pinconf.
[1] "pinctrl: pinctrl-single: Add pinctrl-single,bits type of mux"
(9e605cb68a21d5704839a192a46ebcf387773704),
Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Reported-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Tested-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt index 08f0c3d01575..5a02e30dd262 100644 --- a/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt | |||
| @@ -18,7 +18,8 @@ Optional properties: | |||
| 18 | pin functions is ignored | 18 | pin functions is ignored |
| 19 | 19 | ||
| 20 | - pinctrl-single,bit-per-mux : boolean to indicate that one register controls | 20 | - pinctrl-single,bit-per-mux : boolean to indicate that one register controls |
| 21 | more than one pin | 21 | more than one pin, for which "pinctrl-single,function-mask" property specifies |
| 22 | position mask of pin. | ||
| 22 | 23 | ||
| 23 | - pinctrl-single,drive-strength : array of value that are used to configure | 24 | - pinctrl-single,drive-strength : array of value that are used to configure |
| 24 | drive strength in the pinmux register. They're value of drive strength | 25 | drive strength in the pinmux register. They're value of drive strength |