xref: /kernel/linux/linux-5.10/Documentation/devicetree/bindings/pinctrl/qcom,sdm845-pinctrl.txt

Qualcomm SDM845 TLMM block

This binding describes the Top Level Mode Multiplexer block found in the
SDM845 platform.

- compatible:
	Usage: required
	Value type: <string>
	Definition: must be "qcom,sdm845-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>

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-gpio149
		        Supports mux, bias and drive-strength

		      sdc2_clk, sdc2_cmd, sdc2_data, ufs_reset
		        Supports bias and drive-strength

- 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:

		    gpio, adsp_ext, agera_pll, atest_char, atest_tsens,
		    atest_tsens2, atest_usb1, atest_usb10, atest_usb11,
		    atest_usb12, atest_usb13, atest_usb2, atest_usb20,
		    atest_usb21, atest_usb22, atest_usb23, audio_ref,
		    btfm_slimbus, cam_mclk, cci_async, cci_i2c, cci_timer0,
		    cci_timer1, cci_timer2, cci_timer3, cci_timer4, cri_trng,
		    cri_trng0, cri_trng1, dbg_out, ddr_bist, ddr_pxi0,
		    ddr_pxi1, ddr_pxi2, ddr_pxi3, edp_hot, edp_lcd, gcc_gp1,
		    gcc_gp2, gcc_gp3, jitter_bist, ldo_en, ldo_update,
		    lpass_slimbus, m_voc, mdp_vsync, mdp_vsync0, mdp_vsync1,
		    mdp_vsync2, mdp_vsync3, mss_lte, nav_pps, pa_indicator,
		    pci_e0, pci_e1, phase_flag, pll_bist, pll_bypassnl,
		    pll_reset, pri_mi2s, pri_mi2s_ws, prng_rosc, qdss_cti,
		    qdss, qlink_enable, qlink_request, qua_mi2s, qup0, qup1,
		    qup10, qup11, qup12, qup13, qup14, qup15, qup2, qup3, qup4,
		    qup5, qup6, qup7, qup8, qup9, qup_l4, qup_l5, qup_l6,
		    qspi_clk, qspi_cs, qspi_data, sd_write, sdc4_clk, sdc4_cmd,
		    sdc4_data, sec_mi2s, sp_cmu, spkr_i2s, ter_mi2s, tgu_ch0,
		    tgu_ch1, tgu_ch2, tgu_ch3, tsense_pwm1, tsense_pwm2,
		    tsif1_clk, tsif1_data, tsif1_en, tsif1_error, tsif1_sync,
		    tsif2_clk, tsif2_data, tsif2_en, tsif2_error, tsif2_sync,
		    uim1_clk, uim1_data, uim1_present, uim1_reset, uim2_clk,
		    uim2_data, uim2_present, uim2_reset, uim_batt, usb_phy,
		    vfr_1, vsense_trigger, wlan1_adc0, wlan1_adc1, wlan2_adc0,
		    wlan2_adc1,

- 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.
		    Not valid for sdc pins.

- output-low:
	Usage: optional
	Value type: <none>
	Definition: The specified pins are configured in output mode, driven
		    low.
		    Not valid for sdc pins.

- 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@3400000 {
		compatible = "qcom,sdm845-pinctrl";
		reg = <0x03400000 0xc00000>;
		interrupts = <GIC_SPI 208 0>;
		gpio-controller;
		#gpio-cells = <2>;
		interrupt-controller;
		#interrupt-cells = <2>;

		qup9_active: qup9-active {
			mux {
				pins = "gpio4", "gpio5";
				function = "qup9";
			};

			config {
				pins = "gpio4", "gpio5";
				drive-strength = <2>;
				bias-disable;
			};
		};
	};