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author | Bjorn Andersson <bjorn.andersson@sonymobile.com> | 2014-03-31 14:49:56 -0700 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2014-04-22 08:41:35 +0200 |
commit | 55f5587a4977384b88185b08e3c3ffbd9f0994f4 (patch) | |
tree | 3fc8ec83aede05b5e59a0a65d0d84062e97ccb71 /Documentation/devicetree/bindings/pinctrl | |
parent | 3c25381f9b3375c326f5ead194cb91b5ac181f08 (diff) | |
download | op-kernel-dev-55f5587a4977384b88185b08e3c3ffbd9f0994f4.zip op-kernel-dev-55f5587a4977384b88185b08e3c3ffbd9f0994f4.tar.gz |
pinctrl: msm: Add documentation for pinctrl-apq8064 binding
DT bindingdocumentation for qcom,apq8064-pinctrl driver.
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/pinctrl')
-rw-r--r-- | Documentation/devicetree/bindings/pinctrl/qcom,apq8064-pinctrl.txt | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,apq8064-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/qcom,apq8064-pinctrl.txt new file mode 100644 index 0000000..7181f92 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/qcom,apq8064-pinctrl.txt @@ -0,0 +1,88 @@ +Qualcomm APQ8064 TLMM block + +Required properties: +- compatible: "qcom,apq8064-pinctrl" +- reg: Should be the base address and length of the TLMM block. +- interrupts: Should be the parent IRQ of the TLMM block. +- interrupt-controller: Marks the device node as an interrupt controller. +- #interrupt-cells: Should be two. +- gpio-controller: Marks the device node as a GPIO controller. +- #gpio-cells : Should be two. + The first cell is the gpio pin number and the + second cell is used for optional parameters. + +Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for +a general description of GPIO and interrupt bindings. + +Please refer to pinctrl-bindings.txt in this directory for details of the +common pinctrl bindings used by client devices, including the meaning of the +phrase "pin configuration node". + +Qualcomm's pin configuration nodes act as a container for an abitrary number of +subnodes. Each of these subnodes represents some desired configuration for a +pin, a group, or a list of pins or groups. This configuration can include the +mux function to select on those pin(s)/group(s), and various pin configuration +parameters, such as pull-up, drive strength, etc. + +The name of each subnode is not important; all subnodes should be enumerated +and processed purely based on their content. + +Each subnode only affects those parameters that are explicitly listed. In +other words, a subnode that lists a mux function but no pin configuration +parameters implies no information about any pin configuration parameters. +Similarly, a pin subnode that describes a pullup parameter implies no +information about e.g. the mux function. + + +The following generic properties as defined in pinctrl-bindings.txt are valid +to specify in a pin configuration subnode: + + pins, function, bias-disable, bias-pull-down, bias-pull,up, drive-strength, + output-low, output-high. + +Non-empty subnodes must specify the 'pins' property. + +Valid values for pins are: + gpio0-gpio89 + +Valid values for function are: + cam_mclk, codec_mic_i2s, codec_spkr_i2s, gsbi1, gsbi2, gsbi3, gsbi4, + gsbi4_cam_i2c, gsbi5, gsbi5_spi_cs1, gsbi5_spi_cs2, gsbi5_spi_cs3, gsbi6, + gsbi6_spi_cs1, gsbi6_spi_cs2, gsbi6_spi_cs3, gsbi7, gsbi7_spi_cs1, + gsbi7_spi_cs2, gsbi7_spi_cs3, gsbi_cam_i2c, hdmi, mi2s, riva_bt, riva_fm, + riva_wlan, sdc2, sdc4, slimbus, spkr_i2s, tsif1, tsif2, usb2_hsic, + +Example: + + msmgpio: pinctrl@800000 { + compatible = "qcom,apq8064-pinctrl"; + reg = <0x800000 0x4000>; + + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + interrupts = <0 32 0x4>; + + pinctrl-names = "default"; + pinctrl-0 = <&gsbi5_uart_default>; + + gsbi5_uart_default: gsbi5_uart_default { + mux { + pins = "gpio51", "gpio52"; + function = "gsbi5"; + }; + + tx { + pins = "gpio51"; + drive-strength = <4>; + bias-disable; + }; + + rx { + pins = "gpio52"; + drive-strength = <2>; + bias-pull-up; + }; + }; + }; |