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161 lines
4.2 KiB
161 lines
4.2 KiB
Qualcomm MDM9615 TLMM block |
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This binding describes the Top Level Mode Multiplexer block found in the |
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MDM9615 platform. |
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- compatible: |
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Usage: required |
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Value type: <string> |
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Definition: must be "qcom,mdm9615-pinctrl" |
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- reg: |
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Usage: required |
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Value type: <prop-encoded-array> |
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Definition: the base address and size of the TLMM register space. |
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- interrupts: |
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Usage: required |
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Value type: <prop-encoded-array> |
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Definition: should specify the TLMM summary IRQ. |
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- interrupt-controller: |
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Usage: required |
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Value type: <none> |
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Definition: identifies this node as an interrupt controller |
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- #interrupt-cells: |
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Usage: required |
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Value type: <u32> |
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Definition: must be 2. Specifying the pin number and flags, as defined |
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in <dt-bindings/interrupt-controller/irq.h> |
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- gpio-controller: |
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Usage: required |
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Value type: <none> |
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Definition: identifies this node as a gpio controller |
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- #gpio-cells: |
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Usage: required |
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Value type: <u32> |
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Definition: must be 2. Specifying the pin number and flags, as defined |
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in <dt-bindings/gpio/gpio.h> |
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- gpio-ranges: |
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Usage: required |
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Definition: see ../gpio/gpio.txt |
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- gpio-reserved-ranges: |
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Usage: optional |
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Definition: see ../gpio/gpio.txt |
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Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for |
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a general description of GPIO and interrupt bindings. |
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Please refer to pinctrl-bindings.txt in this directory for details of the |
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common pinctrl bindings used by client devices, including the meaning of the |
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phrase "pin configuration node". |
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The pin configuration nodes act as a container for an arbitrary number of |
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subnodes. Each of these subnodes represents some desired configuration for a |
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pin, a group, or a list of pins or groups. This configuration can include the |
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mux function to select on those pin(s)/group(s), and various pin configuration |
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parameters, such as pull-up, drive strength, etc. |
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PIN CONFIGURATION NODES: |
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The name of each subnode is not important; all subnodes should be enumerated |
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and processed purely based on their content. |
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Each subnode only affects those parameters that are explicitly listed. In |
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other words, a subnode that lists a mux function but no pin configuration |
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parameters implies no information about any pin configuration parameters. |
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Similarly, a pin subnode that describes a pullup parameter implies no |
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information about e.g. the mux function. |
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The following generic properties as defined in pinctrl-bindings.txt are valid |
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to specify in a pin configuration subnode: |
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- pins: |
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Usage: required |
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Value type: <string-array> |
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Definition: List of gpio pins affected by the properties specified in |
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this subnode. Valid pins are: |
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gpio0-gpio87 |
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- function: |
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Usage: required |
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Value type: <string> |
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Definition: Specify the alternative function to be configured for the |
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specified pins. |
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Valid values are: |
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gpio, gsbi2_i2c, gsbi3, gsbi4, gsbi5_i2c, gsbi5_uart, |
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sdc2, ebi2_lcdc, ps_hold, prim_audio, sec_audio, |
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cdc_mclk |
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- bias-disable: |
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Usage: optional |
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Value type: <none> |
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Definition: The specified pins should be configured as no pull. |
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- bias-pull-down: |
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Usage: optional |
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Value type: <none> |
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Definition: The specified pins should be configured as pull down. |
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- bias-pull-up: |
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Usage: optional |
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Value type: <none> |
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Definition: The specified pins should be configured as pull up. |
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- output-high: |
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Usage: optional |
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Value type: <none> |
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Definition: The specified pins are configured in output mode, driven |
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high. |
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- output-low: |
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Usage: optional |
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Value type: <none> |
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Definition: The specified pins are configured in output mode, driven |
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low. |
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- drive-strength: |
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Usage: optional |
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Value type: <u32> |
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Definition: Selects the drive strength for the specified pins, in mA. |
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Valid values are: 2, 4, 6, 8, 10, 12, 14 and 16 |
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Example: |
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msmgpio: pinctrl@800000 { |
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compatible = "qcom,mdm9615-pinctrl"; |
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reg = <0x800000 0x4000>; |
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gpio-controller; |
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#gpio-cells = <2>; |
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gpio-ranges = <&msmgpio 0 0 88>; |
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interrupt-controller; |
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#interrupt-cells = <2>; |
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interrupts = <0 16 0x4>; |
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gsbi8_uart: gsbi8-uart { |
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mux { |
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pins = "gpio34", "gpio35"; |
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function = "gsbi8"; |
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}; |
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tx { |
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pins = "gpio34"; |
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drive-strength = <4>; |
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bias-disable; |
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}; |
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rx { |
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pins = "gpio35"; |
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drive-strength = <2>; |
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bias-pull-up; |
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}; |
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}; |
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};
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