xref: /kernel/linux/linux-5.10/Documentation/devicetree/bindings/pinctrl/qcom,msm8994-pinctrl.txt (revision 8c2ecf20)

Qualcomm MSM8994 TLMM block

This binding describes the Top Level Mode Multiplexer block found in the
MSM8994 platform.

- compatible:
	Usage: required
	Value type: <string>
	Definition: Should contain one of:
		    "qcom,msm8992-pinctrl",
		    "qcom,msm8994-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-gpio145
		        Supports mux, bias and drive-strength

		      sdc1_clk, sdc1_cmd, sdc1_data sdc1_rclk, sdc2_clk,
		      sdc2_cmd, sdc2_data
		        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:

		    audio_ref_clk,  blsp_i2c1, blsp_i2c2, blsp_i2c3, blsp_i2c4, blsp_i2c5,
		    blsp_i2c6, blsp_i2c7, blsp_i2c8, blsp_i2c9, blsp_i2c10, blsp_i2c11,
		    blsp_i2c12, blsp_spi1, blsp_spi1_cs1, blsp_spi1_cs2, blsp_spi1_cs3,
		    blsp_spi2, blsp_spi2_cs1, blsp_spi2_cs2, blsp_spi2_cs3, blsp_spi3,
		    blsp_spi4, blsp_spi5, blsp_spi6, blsp_spi7, blsp_spi8, blsp_spi9,
		    blsp_spi10, blsp_spi10_cs1, blsp_spi10_cs2, blsp_spi10_cs3, blsp_spi11,
		    blsp_spi12, blsp_uart1, blsp_uart2, blsp_uart3, blsp_uart4, blsp_uart5,
		    blsp_uart6, blsp_uart7, blsp_uart8, blsp_uart9, blsp_uart10, blsp_uart11,
		    blsp_uart12, blsp_uim1, blsp_uim2, blsp_uim3, blsp_uim4, blsp_uim5,
		    blsp_uim6, blsp_uim7, blsp_uim8, blsp_uim9, blsp_uim10, blsp_uim11,
		    blsp_uim12, blsp11_i2c_scl_b, blsp11_i2c_sda_b, blsp11_uart_rx_b,
		    blsp11_uart_tx_b, cam_mclk0, cam_mclk1, cam_mclk2, cam_mclk3,
		    cci_async_in0, cci_async_in1, cci_async_in2, cci_i2c0, cci_i2c1,
		    cci_timer0, cci_timer1, cci_timer2, cci_timer3, cci_timer4,
		    gcc_gp1_clk_a, gcc_gp1_clk_b, gcc_gp2_clk_a, gcc_gp2_clk_b, gcc_gp3_clk_a,
		    gcc_gp3_clk_b, gp_mn, gp_pdm0, gp_pdm1, gp_pdm2, gp0_clk,
		    gp1_clk, gps_tx, gsm_tx, hdmi_cec, hdmi_ddc, hdmi_hpd, hdmi_rcv,
		    mdp_vsync, mss_lte, nav_pps, nav_tsync, qdss_cti_trig_in_a,
		    qdss_cti_trig_in_b, qdss_cti_trig_in_c, qdss_cti_trig_in_d,
		    qdss_cti_trig_out_a, qdss_cti_trig_out_b, qdss_cti_trig_out_c,
		    qdss_cti_trig_out_d, qdss_traceclk_a, qdss_traceclk_b, qdss_tracectl_a,
		    qdss_tracectl_b, qdss_tracedata_a, qdss_tracedata_b, qua_mi2s, pci_e0,
		    pci_e1, pri_mi2s, sdc4, sec_mi2s, slimbus, spkr_i2s, ter_mi2s, tsif1,
		    tsif2, uim_batt_alarm, uim1, uim2, uim3, uim4, gpio

- 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:

	msmgpio: pinctrl@fd510000 {
		compatible = "qcom,msm8994-pinctrl";
		reg = <0xfd510000 0x4000>;
		interrupts = <GIC_SPI 208 IRQ_TYPE_LEVEL_HIGH>;
		gpio-controller;
		#gpio-cells = <2>;
		gpio-ranges = <&msmgpio 0 0 146>;
		interrupt-controller;
		#interrupt-cells = <2>;

		blsp1_uart2_default: blsp1_uart2_default {
			pinmux {
				pins = "gpio4", "gpio5";
				function = "blsp_uart2";
			};
			pinconf {
				pins = "gpio4", "gpio5";
				drive-strength = <16>;
				bias-disable;
			};
		};
	};