75 lines
2.6 KiB
Plaintext
75 lines
2.6 KiB
Plaintext
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Qualcomm Atheros IPQ4019 TLMM block
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This is the Top Level Mode Multiplexor block found on the Qualcomm IPQ8019
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platform, it provides pinctrl, pinmux, pinconf, and gpiolib facilities.
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Required properties:
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- compatible: "qcom,ipq4019-pinctrl"
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- reg: Should be the base address and length of the TLMM block.
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- interrupts: Should be the parent IRQ of the TLMM block.
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- interrupt-controller: Marks the device node as an interrupt controller.
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- #interrupt-cells: Should be two.
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- gpio-controller: Marks the device node as a GPIO controller.
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- #gpio-cells : Should be two.
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The first cell is the gpio pin number and the
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second cell is used for optional parameters.
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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 abitrary 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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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, function, bias-disable, bias-pull-down, bias-pull,up, drive-strength.
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Non-empty subnodes must specify the 'pins' property.
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Note that not all properties are valid for all pins.
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Valid values for qcom,pins are:
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gpio0-gpio99
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Supports mux, bias and drive-strength
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Valid values for qcom,function are:
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gpio, blsp_uart1, blsp_i2c0, blsp_i2c1, blsp_uart0, blsp_spi1, blsp_spi0
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Example:
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tlmm: pinctrl@1000000 {
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compatible = "qcom,ipq4019-pinctrl";
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reg = <0x1000000 0x300000>;
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gpio-controller;
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#gpio-cells = <2>;
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interrupt-controller;
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#interrupt-cells = <2>;
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interrupts = <0 208 0>;
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serial_pins: serial_pinmux {
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mux {
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pins = "gpio60", "gpio61";
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function = "blsp_uart0";
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bias-disable;
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};
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};
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};
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