Kernel-4.18.0-80.el8_qcom,msm8960-pinctrl

Qualcomm MSM8960 TLMM block

This binding describes the Top Level Mode Multiplexer block found in the
MSM8960 platform.

• compatible:
  Usage: required
  Value type:
  Definition: must be “qcom,msm8960-pinctrl”

• reg:
  Usage: required
  Value type:
  Definition: the base address and size of the TLMM register space.

• interrupts:
  Usage: required
  Value type:
  Definition: should specify the TLMM summary IRQ.

• interrupt-controller:
  Usage: required
  Value type:
  Definition: identifies this node as an interrupt controller

• #interrupt-cells:
  Usage: required
  Value type:
  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:
  Definition: identifies this node as a gpio controller

• #gpio-cells:
  Usage: required
  Value type:
  Definition: must be 2. Specifying the pin number and flags, as defined

        in <dt-bindings/gpio/gpio.h>
  

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:
  Definition: List of gpio pins affected by the properties specified in

        this subnode.  Valid pins are:
        gpio0-gpio151,
        sdc1_clk,
        sdc1_cmd,
        sdc1_data
        sdc3_clk,
        sdc3_cmd,
        sdc3_data
  

• function:
  Usage: required
  Value type:
  Definition: Specify the alternative function to be configured for the

        specified pins. Functions are only valid for gpio pins.
        Valid values are:
        audio_pcm, bt, cam_mclk0, cam_mclk1, cam_mclk2,
        codec_mic_i2s, codec_spkr_i2s, ext_gps, fm, gps_blanking,
        gps_pps_in, gps_pps_out, gp_clk_0a, gp_clk_0b, gp_clk_1a,
        gp_clk_1b, gp_clk_2a, gp_clk_2b, gp_mn, gp_pdm_0a,
        gp_pdm_0b, gp_pdm_1a, gp_pdm_1b, gp_pdm_2a, gp_pdm_2b, gpio,
        gsbi1, gsbi1_spi_cs1_n, gsbi1_spi_cs2a_n, gsbi1_spi_cs2b_n,
        gsbi1_spi_cs3_n, gsbi2, gsbi2_spi_cs1_n, gsbi2_spi_cs2_n,
        gsbi2_spi_cs3_n, gsbi3, gsbi4, gsbi4_3d_cam_i2c_l,
        gsbi4_3d_cam_i2c_r, gsbi5, gsbi5_3d_cam_i2c_l,
        gsbi5_3d_cam_i2c_r, gsbi6, gsbi7, gsbi8, gsbi9, gsbi10,
        gsbi11, gsbi11_spi_cs1a_n, gsbi11_spi_cs1b_n,
        gsbi11_spi_cs2a_n, gsbi11_spi_cs2b_n, gsbi11_spi_cs3_n,
        gsbi12, hdmi_cec, hdmi_ddc_clock, hdmi_ddc_data,
        hdmi_hot_plug_detect, hsic, mdp_vsync, mi2s, mic_i2s,
        pmb_clk, pmb_ext_ctrl, ps_hold, rpm_wdog, sdc2, sdc4, sdc5,
        slimbus1, slimbus2, spkr_i2s, ssbi1, ssbi2, ssbi_ext_gps,
        ssbi_pmic2, ssbi_qpa1, ssbi_ts, tsif1, tsif2, ts_eoc,
        usb_fs1, usb_fs1_oe, usb_fs1_oe_n, usb_fs2, usb_fs2_oe,
        usb_fs2_oe_n, vfe_camif_timer1_a, vfe_camif_timer1_b,
        vfe_camif_timer2, vfe_camif_timer3_a, vfe_camif_timer3_b,
        vfe_camif_timer4_a, vfe_camif_timer4_b, vfe_camif_timer4_c,
        vfe_camif_timer5_a, vfe_camif_timer5_b, vfe_camif_timer6_a,
        vfe_camif_timer6_b, vfe_camif_timer6_c, vfe_camif_timer7_a,
        vfe_camif_timer7_b, vfe_camif_timer7_c, wlan
  

• bias-disable:
  Usage: optional
  Value type:
  Definition: The specified pins should be configued as no pull.

• bias-pull-down:
  Usage: optional
  Value type:
  Definition: The specified pins should be configued as pull down.

• bias-pull-up:
  Usage: optional
  Value type:
  Definition: The specified pins should be configued as pull up.

• output-high:
  Usage: optional
  Value type:
  Definition: The specified pins are configured in output mode, driven

        high.
        Not valid for sdc pins.
  

• output-low:
  Usage: optional
  Value type:
  Definition: The specified pins are configured in output mode, driven

        low.
        Not valid for sdc pins.
  

• drive-strength:
  Usage: optional
  Value type:
  Definition: Selects the drive strength for the specified pins, in mA.

        Valid values are: 2, 4, 6, 8, 10, 12, 14 and 16
  

Example:

msmgpio: pinctrl@800000 {
    compatible = "qcom,msm8960-pinctrl";
    reg = <0x800000 0x4000>;

    gpio-controller;
    #gpio-cells = <2>;
    interrupt-controller;
    #interrupt-cells = <2>;
    interrupts = <0 16 0x4>;

    gsbi8_uart: gsbi8-uart {
        mux {
            pins = "gpio34", "gpio35";
            function = "gsbi8";
        };

        tx {
            pins = "gpio34";
            drive-strength = <4>;
            bias-disable;
        };

        rx {
            pins = "gpio35";
            drive-strength = <2>;
            bias-pull-up;
        };
    };
};