Kernel-4.18.0-80.el8_qcom,msm8974-pinctrl

Qualcomm MSM8974 TLMM block

Required properties:

• compatible: “qcom,msm8974-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.
  

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”.

Qualcomm’s 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-strength.

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

Valid values for pins are:
gpio0-gpio145
Supports mux, bias and drive-strength

sdc1_clk, sdc1_cmd, sdc1_data, sdc2_clk, sdc2_cmd, sdc2_data
Supports bias and drive-strength

hsic_data, hsic_strobe
Supports only mux

Valid values for function are:
cci_i2c0, cci_i2c1, uim1, uim2, uim_batt_alarm,
blsp_uim1, blsp_uart1, blsp_i2c1, blsp_spi1,
blsp_uim2, blsp_uart2, blsp_i2c2, blsp_spi2,
blsp_uim3, blsp_uart3, blsp_i2c3, blsp_spi3,
blsp_uim4, blsp_uart4, blsp_i2c4, blsp_spi4,
blsp_uim5, blsp_uart5, blsp_i2c5, blsp_spi5,
blsp_uim6, blsp_uart6, blsp_i2c6, blsp_spi6,
blsp_uim7, blsp_uart7, blsp_i2c7, blsp_spi7,
blsp_uim8, blsp_uart8, blsp_i2c8, blsp_spi8,
blsp_uim9, blsp_uart9, blsp_i2c9, blsp_spi9,
blsp_uim10, blsp_uart10, blsp_i2c10, blsp_spi10,
blsp_uim11, blsp_uart11, blsp_i2c11, blsp_spi11,
blsp_uim12, blsp_uart12, blsp_i2c12, blsp_spi12,
blsp_spi1_cs1, blsp_spi2_cs2, blsp_spi_cs3, blsp_spi2_cs1, blsp_spi2_cs2
blsp_spi2_cs3, blsp_spi10_cs1, blsp_spi10_cs2, blsp_spi10_cs3,
sdc3, sdc4, gcc_gp_clk1, gcc_gp_clk2, gcc_gp_clk3, cci_timer0, cci_timer1,
cci_timer2, cci_timer3, cci_async_in0, cci_async_in1, cci_async_in2,
cam_mckl0, cam_mclk1, cam_mclk2, cam_mclk3, mdp_vsync, hdmi_cec, hdmi_ddc,
hdmi_hpd, edp_hpd, gp_pdm0, gp_pdm1, gp_pdm2, gp_pdm3, gp0_clk, gp1_clk,
gp_mn, tsif1, tsif2, hsic, grfc, audio_ref_clk, qua_mi2s, pri_mi2s, spkr_mi2s,
ter_mi2s, sec_mi2s, bt, fm, wlan, slimbus, hsic_ctl, gpio

(Note that this is not yet the complete list of functions)

Example:

msmgpio: pinctrl@fd510000 {
    compatible = "qcom,msm8974-pinctrl";
    reg = <0xfd510000 0x4000>;

    gpio-controller;
    #gpio-cells = <2>;
    interrupt-controller;
    #interrupt-cells = <2>;
    interrupts = <0 208 0>;

    pinctrl-names = "default";
    pinctrl-0 = <&uart2_default>;

    uart2_default: uart2_default {
        mux {
            pins = "gpio4", "gpio5";
            function = "blsp_uart2";
        };

        tx {
            pins = "gpio4";
            drive-strength = <4>;
            bias-disable;
        };

        rx {
            pins = "gpio5";
            drive-strength = <2>;
            bias-pull-up;
        };
    };
};