xref: /openbmc/linux/Documentation/devicetree/bindings/pinctrl/qcom,ipq4019-pinctrl.txt (revision cbecf716ca618fd44feda6bd9a64a8179d031fc5)

Qualcomm Atheros IPQ4019 TLMM block

This is the Top Level Mode Multiplexor block found on the Qualcomm IPQ8019
platform, it provides pinctrl, pinmux, pinconf, and gpiolib facilities.

Required properties:
- compatible: "qcom,ipq4019-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.
- gpio-ranges: see ../gpio/gpio.txt

Optional properties:

- gpio-reserved-ranges: see ../gpio/gpio.txt

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".

The pin configuration nodes act as a container for an arbitrary 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-open-drain,
 drive-strength.

Non-empty subnodes must specify the 'pins' property.
Note that not all properties are valid for all pins.


Valid values for qcom,pins are:
  gpio0-gpio99
    Supports mux, bias and drive-strength

Valid values for qcom,function are:
aud_pin, audio_pwm, blsp_i2c0, blsp_i2c1, blsp_spi0, blsp_spi1, blsp_uart0,
blsp_uart1, chip_rst, gpio, i2s_rx, i2s_spdif_in, i2s_spdif_out, i2s_td, i2s_tx,
jtag, led0, led1, led2, led3, led4, led5, led6, led7, led8, led9, led10, led11,
mdc, mdio, pcie, pmu, prng_rosc, qpic, rgmii, rmii, sdio, smart0, smart1,
smart2, smart3, tm, wifi0, wifi1

Example:

	tlmm: pinctrl@1000000 {
		compatible = "qcom,ipq4019-pinctrl";
		reg = <0x1000000 0x300000>;

		gpio-controller;
		#gpio-cells = <2>;
		gpio-ranges = <&tlmm 0 0 100>;
		interrupt-controller;
		#interrupt-cells = <2>;
		interrupts = <0 208 0>;

		serial_pins: serial_pinmux {
			mux {
				pins = "gpio60", "gpio61";
				function = "blsp_uart0";
				bias-disable;
			};
		};
	};