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author | 2012-12-14 15:24:01 +0800 | |
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committer | 2012-12-26 01:59:52 +0100 | |
commit | 408f181e0d4210ef7c77e825289d31fac530291c (patch) | |
tree | 704c61d090f1cf80b24dfccf4ed3c81ee1fe70df /Documentation | |
parent | pinctrl: fix comment mistake (diff) | |
download | linux-408f181e0d4210ef7c77e825289d31fac530291c.tar.gz linux-408f181e0d4210ef7c77e825289d31fac530291c.tar.bz2 linux-408f181e0d4210ef7c77e825289d31fac530291c.zip |
pinctrl: sirf: add missing DT-binding document
While sending email to Linus for reviewing:
"pinctrl: sirf: add DT-binding pinmux mapping support"
https://patchwork.kernel.org/patch/1364361/
i have included the devicetree/bindings/pinctrl/pinctrl-sirf.txt
But while sending pull request with commit 056876f6c73406c,
i missed the document.
this patch takes the document back.
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/pinctrl/pinctrl-sirf.txt | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-sirf.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-sirf.txt new file mode 100644 index 000000000000..a2896df702ad --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-sirf.txt @@ -0,0 +1,44 @@ +CSR SiRFprimaII pinmux controller + +Required properties: +- compatible : "sirf,prima2-pinctrl" +- reg : Address range of the pinctrl registers +- interrupts : Interrupts used by every GPIO group +- gpio-controller : Indicates this device is a GPIO controller +- interrupt-controller : Marks the device node as an interrupt controller + +Please refer to pinctrl-bindings.txt in this directory for details of the common +pinctrl bindings used by client devices. + +SiRFprimaII's pinmux nodes act as a container for an abitrary number of subnodes. +Each of these subnodes represents some desired configuration for a group of pins. + +Required subnode-properties: +- sirf,pins : An array of strings. Each string contains the name of a group. +- sirf,function: A string containing the name of the function to mux to the + group. + + Valid values for group and function names can be found from looking at the + group and function arrays in driver files: + drivers/pinctrl/pinctrl-sirf.c + +For example, pinctrl might have subnodes like the following: + uart2_pins_a: uart2@0 { + uart { + sirf,pins = "uart2grp"; + sirf,function = "uart2"; + }; + }; + uart2_noflow_pins_a: uart2@1 { + uart { + sirf,pins = "uart2_nostreamctrlgrp"; + sirf,function = "uart2_nostreamctrl"; + }; + }; + +For a specific board, if it wants to use uart2 without hardware flow control, +it can add the following to its board-specific .dts file. +uart2: uart@0xb0070000 { + pinctrl-names = "default"; + pinctrl-0 = <&uart2_noflow_pins_a>; +} |