FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/pinctrl/qcom,ipq8074-pinctrl.txt

     Qualcomm Technologies, Inc. IPQ8074 TLMM block
     
     This binding describes the Top Level Mode Multiplexer block found in the
     IPQ8074 platform.
     
     - compatible:
             Usage: required
             Value type: <string>
             Definition: must be "qcom,ipq8074-pinctrl"
    
    - reg:
            Usage: required
            Value type: <prop-encoded-array>
            Definition: the base address and size of the TLMM register space.
    
    - interrupts:
            Usage: required
            Value type: <prop-encoded-array>
            Definition: should specify the TLMM summary IRQ.
    
    - interrupt-controller:
            Usage: required
            Value type: <none>
            Definition: identifies this node as an interrupt controller
    
    - #interrupt-cells:
            Usage: required
            Value type: <u32>
            Definition: must be 2. Specifying the pin number and flags, as defined
                        in <dt-bindings/interrupt-controller/irq.h>
    
    - gpio-controller:
            Usage: required
            Value type: <none>
            Definition: identifies this node as a gpio controller
    
    - #gpio-cells:
            Usage: required
            Value type: <u32>
            Definition: must be 2. Specifying the pin number and flags, as defined
                        in <dt-bindings/gpio/gpio.h>
    
    - gpio-ranges:
            Usage: required
            Definition:  see ../gpio/gpio.txt
    
    - gpio-reserved-ranges:
            Usage: optional
            Definition: 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.
    
    
    PIN CONFIGURATION NODES:
    
    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:
            Usage: required
            Value type: <string-array>
            Definition: List of gpio pins affected by the properties specified in
                        this subnode.  Valid pins are:
                        gpio0-gpio69
    
    - function:
            Usage: required
            Value type: <string>
            Definition: Specify the alternative function to be configured for the
                        specified pins. Functions are only valid for gpio pins.
                        Valid values are:
                        atest_char, atest_char0, atest_char1, atest_char2,
                        atest_char3, audio_rxbclk, audio_rxd, audio_rxfsync,
                        audio_rxmclk, audio_txbclk, audio_txd, audio_txfsync,
                        audio_txmclk, blsp0_i2c, blsp0_spi, blsp0_uart, blsp1_i2c,
                        blsp1_spi, blsp1_uart, blsp2_i2c, blsp2_spi, blsp2_uart,
                        blsp3_i2c, blsp3_spi, blsp3_spi0, blsp3_spi1, blsp3_spi2,
                        blsp3_spi3, blsp3_uart, blsp4_i2c0, blsp4_i2c1, blsp4_spi0,
                       blsp4_spi1, blsp4_uart0, blsp4_uart1, blsp5_i2c, blsp5_spi,
                       blsp5_uart, burn0, burn1, cri_trng, cri_trng0, cri_trng1,
                       cxc0, cxc1, dbg_out, gcc_plltest, gcc_tlmm, gpio, ldo_en,
                       ldo_update, led0, led1, led2, mac0_sa0, mac0_sa1, mac1_sa0,
                       mac1_sa1, mac1_sa2, mac1_sa3, mac2_sa0, mac2_sa1, mdc,
                       mdio, pcie0_clk, pcie0_rst, pcie0_wake, pcie1_clk,
                       pcie1_rst, pcie1_wake, pcm_drx, pcm_dtx, pcm_fsync,
                       pcm_pclk, pcm_zsi0, pcm_zsi1, prng_rosc, pta1_0, pta1_1,
                       pta1_2, pta2_0, pta2_1, pta2_2, pwm0, pwm1, pwm2, pwm3,
                       qdss_cti_trig_in_a0, qdss_cti_trig_in_a1,
                       qdss_cti_trig_in_b0, qdss_cti_trig_in_b1,
                       qdss_cti_trig_out_a0, qdss_cti_trig_out_a1,
                       qdss_cti_trig_out_b0, qdss_cti_trig_out_b1,
                       qdss_traceclk_a, qdss_traceclk_b, qdss_tracectl_a,
                       qdss_tracectl_b, qdss_tracedata_a, qdss_tracedata_b,
                       qpic, rx0, rx1, rx2, sd_card, sd_write, tsens_max, wci2a,
                       wci2b, wci2c, wci2d
   
   - bias-disable:
           Usage: optional
           Value type: <none>
           Definition: The specified pins should be configured as no pull.
   
   - bias-pull-down:
           Usage: optional
           Value type: <none>
           Definition: The specified pins should be configured as pull down.
   
   - bias-pull-up:
           Usage: optional
           Value type: <none>
           Definition: The specified pins should be configured as pull up.
   
   - output-high:
           Usage: optional
           Value type: <none>
           Definition: The specified pins are configured in output mode, driven
                       high.
   
   - output-low:
           Usage: optional
           Value type: <none>
           Definition: The specified pins are configured in output mode, driven
                       low.
   
   - drive-strength:
           Usage: optional
           Value type: <u32>
           Definition: Selects the drive strength for the specified pins, in mA.
                       Valid values are: 2, 4, 6, 8, 10, 12, 14 and 16
   
   Example:
   
           tlmm: pinctrl@1000000 {
                   compatible = "qcom,ipq8074-pinctrl";
                   reg = <0x1000000 0x300000>;
                   interrupts = <GIC_SPI 208 IRQ_TYPE_LEVEL_HIGH>;
                   gpio-controller;
                   #gpio-cells = <2>;
                   gpio-ranges = <&tlmm 0 0 70>;
                   interrupt-controller;
                   #interrupt-cells = <2>;
   
                   uart2: uart2-default {
                           mux {
                                   pins = "gpio23", "gpio24";
                                   function = "blsp4_uart1";
                           };
   
                           rx {
                                   pins = "gpio23";
                                   drive-strength = <4>;
                                   bias-disable;
                           };
   
                           tx {
                                   pins = "gpio24";
                                   drive-strength = <2>;
                                   bias-pull-up;
                           };
                   };
           };

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