dt-bindings: Adding pinctrl devicetree binding for bengal

Qualcomm Technologies, Inc. BENGAL TLMM block

This binding describes the Top Level Mode Multiplexer block found in the

BENGAL platform.

- compatible:

	Usage: required

	Value type: <string>

	Definition: must be "qcom,bengal-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-gpio112

		        Supports mux, bias and drive-strength

		      sdc1_clk, sdc1_cmd, sdc1_data sdc2_clk, sdc2_cmd,

		      sdc2_data sdc1_rclk

		        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:

		    blsp_uart1, blsp_spi1, blsp_i2c1, blsp_uim1, atest_tsens,

		    bimc_dte1, dac_calib0, blsp_spi8, blsp_uart8, blsp_uim8,

		    qdss_cti_trig_out_b, bimc_dte0, dac_calib1, qdss_cti_trig_in_b,

		    dac_calib2, atest_tsens2, atest_usb1, blsp_spi10, blsp_uart10,

		    blsp_uim10, atest_bbrx1, atest_usb13, atest_bbrx0, atest_usb12,

		    mdp_vsync, edp_lcd, blsp_i2c10, atest_gpsadc1, atest_usb11,

		    atest_gpsadc0, edp_hot, atest_usb10, m_voc, dac_gpio, atest_char,

		    cam_mclk, pll_bypassnl, qdss_stm7, blsp_i2c8, qdss_tracedata_b,

		    pll_reset, qdss_stm6, qdss_stm5, qdss_stm4, atest_usb2, cci_i2c,

		    qdss_stm3, dac_calib3, atest_usb23, atest_char3, dac_calib4,

		    qdss_stm2, atest_usb22, atest_char2, qdss_stm1, dac_calib5,

		    atest_usb21, atest_char1, dbg_out, qdss_stm0, dac_calib6,

		    atest_usb20, atest_char0, dac_calib10, qdss_stm10,

		    qdss_cti_trig_in_a, cci_timer4, blsp_spi6, blsp_uart6, blsp_uim6,

		    blsp2_spi, qdss_stm9, qdss_cti_trig_out_a, dac_calib11,

		    qdss_stm8, cci_timer0, qdss_stm13, dac_calib7, cci_timer1,

		    qdss_stm12, dac_calib8, cci_timer2, blsp1_spi, qdss_stm11,

		    dac_calib9, cci_timer3, cci_async, dac_calib12, blsp_i2c6,

		    qdss_tracectl_a, dac_calib13, qdss_traceclk_a, dac_calib14,

		    dac_calib15, hdmi_rcv, dac_calib16, hdmi_cec, pwr_modem,

		    dac_calib17, hdmi_ddc, pwr_nav, dac_calib18, pwr_crypto,

		    dac_calib19, hdmi_hot, dac_calib20, dac_calib21, pci_e0,

		    dac_calib22, dac_calib23, dac_calib24, tsif1_sync, dac_calib25,

		    sd_write, tsif1_error, blsp_spi2, blsp_uart2, blsp_uim2,

		    qdss_cti, blsp_i2c2, blsp_spi3, blsp_uart3, blsp_uim3, blsp_i2c3,

		    uim3, blsp_spi9, blsp_uart9, blsp_uim9, blsp10_spi, blsp_i2c9,

		    blsp_spi7, blsp_uart7, blsp_uim7, qdss_tracedata_a, blsp_i2c7,

		    qua_mi2s, gcc_gp1_clk_a, ssc_irq, uim4, blsp_spi11, blsp_uart11,

		    blsp_uim11, gcc_gp2_clk_a, gcc_gp3_clk_a, blsp_i2c11, cri_trng0,

		    cri_trng1, cri_trng, qdss_stm18, pri_mi2s, qdss_stm17, blsp_spi4,

		    blsp_uart4, blsp_uim4, qdss_stm16, qdss_stm15, blsp_i2c4,

		    qdss_stm14, dac_calib26, spkr_i2s, audio_ref, lpass_slimbus,

		    isense_dbg, tsense_pwm1, tsense_pwm2, btfm_slimbus, ter_mi2s,

		    qdss_stm22, qdss_stm21, qdss_stm20, qdss_stm19, gcc_gp1_clk_b,

		    sec_mi2s, blsp_spi5, blsp_uart5, blsp_uim5, gcc_gp2_clk_b,

		    gcc_gp3_clk_b, blsp_i2c5, blsp_spi12, blsp_uart12, blsp_uim12,

		    qdss_stm25, qdss_stm31, blsp_i2c12, qdss_stm30, qdss_stm29,

		    tsif1_clk, qdss_stm28, tsif1_en, tsif1_data, sdc4_cmd, qdss_stm27,

		    qdss_traceclk_b, tsif2_error, sdc43, vfr_1, qdss_stm26, tsif2_clk,

		    sdc4_clk, qdss_stm24, tsif2_en, sdc42, qdss_stm23, qdss_tracectl_b,

		    sd_card, tsif2_data, sdc41, tsif2_sync, sdc40, mdp_vsync_p_b,

		    ldo_en, mdp_vsync_s_b, ldo_update, blsp11_uart_tx_b, blsp11_uart_rx_b,

		    blsp11_i2c_sda_b, prng_rosc, blsp11_i2c_scl_b, uim2, uim1, uim_batt,

		    pci_e2, pa_indicator, adsp_ext, ddr_bist, qdss_tracedata_11,

		    qdss_tracedata_12, modem_tsync, nav_dr, nav_pps, pci_e1, gsm_tx,

		    qspi_cs, ssbi2, ssbi1, mss_lte, qspi_clk, qspi0, qspi1, qspi2, qspi3,

		    gpio

- bias-disable:

	Usage: optional

	Value type: <none>

	Definition: The specified pins should be configued as no pull.

- bias-pull-down:

	Usage: optional

	Value type: <none>

	Definition: The specified pins should be configued as pull down.

- bias-pull-up:

	Usage: optional

	Value type: <none>

	Definition: The specified pins should be configued 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@400000 {

		compatible = "qcom,bengal-pinctrl";

		reg = <0x400000 0xc00000>;

		interrupts = <0 227 0>;

		gpio-controller;

		#gpio-cells = <2>;

		interrupt-controller;

		#interrupt-cells = <2>;

	};