dt-bindings: pinctrl: Add Qualcomm SDM845 TLMM binding

This adds the DeviceTree binding for the Qualcomm SDM845 TLMM block.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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
+		        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 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@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;
+			};
+		};
+	};