From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/arm/boot/dts/omap3.dtsi | 835 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 835 insertions(+) create mode 100644 arch/arm/boot/dts/omap3.dtsi (limited to 'arch/arm/boot/dts/omap3.dtsi') diff --git a/arch/arm/boot/dts/omap3.dtsi b/arch/arm/boot/dts/omap3.dtsi new file mode 100644 index 000000000..69a40cfc1 --- /dev/null +++ b/arch/arm/boot/dts/omap3.dtsi @@ -0,0 +1,835 @@ +/* + * Device Tree Source for OMAP3 SoC + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#include +#include +#include + +#include "skeleton.dtsi" + +/ { + compatible = "ti,omap3430", "ti,omap3"; + interrupt-parent = <&intc>; + + aliases { + i2c0 = &i2c1; + i2c1 = &i2c2; + i2c2 = &i2c3; + serial0 = &uart1; + serial1 = &uart2; + serial2 = &uart3; + }; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + compatible = "arm,cortex-a8"; + device_type = "cpu"; + reg = <0x0>; + + clocks = <&dpll1_ck>; + clock-names = "cpu"; + + clock-latency = <300000>; /* From omap-cpufreq driver */ + }; + }; + + pmu { + compatible = "arm,cortex-a8-pmu"; + reg = <0x54000000 0x800000>; + interrupts = <3>; + ti,hwmods = "debugss"; + }; + + /* + * The soc node represents the soc top level view. It is used for IPs + * that are not memory mapped in the MPU view or for the MPU itself. + */ + soc { + compatible = "ti,omap-infra"; + mpu { + compatible = "ti,omap3-mpu"; + ti,hwmods = "mpu"; + }; + + iva: iva { + compatible = "ti,iva2.2"; + ti,hwmods = "iva"; + + dsp { + compatible = "ti,omap3-c64"; + }; + }; + }; + + /* + * XXX: Use a flat representation of the OMAP3 interconnect. + * The real OMAP interconnect network is quite complex. + * Since it will not bring real advantage to represent that in DT for + * the moment, just use a fake OCP bus entry to represent the whole bus + * hierarchy. + */ + ocp { + compatible = "ti,omap3-l3-smx", "simple-bus"; + reg = <0x68000000 0x10000>; + interrupts = <9 10>; + #address-cells = <1>; + #size-cells = <1>; + ranges; + ti,hwmods = "l3_main"; + + l4_core: l4@48000000 { + compatible = "ti,omap3-l4-core", "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0x48000000 0x1000000>; + + scm: scm@2000 { + compatible = "ti,omap3-scm", "simple-bus"; + reg = <0x2000 0x2000>; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0x2000 0x2000>; + + omap3_pmx_core: pinmux@30 { + compatible = "ti,omap3-padconf", + "pinctrl-single"; + reg = <0x30 0x238>; + #address-cells = <1>; + #size-cells = <0>; + #interrupt-cells = <1>; + interrupt-controller; + pinctrl-single,register-width = <16>; + pinctrl-single,function-mask = <0xff1f>; + }; + + scm_conf: scm_conf@270 { + compatible = "syscon"; + reg = <0x270 0x330>; + #address-cells = <1>; + #size-cells = <1>; + + scm_clocks: clocks { + #address-cells = <1>; + #size-cells = <0>; + }; + }; + + scm_clockdomains: clockdomains { + }; + + omap3_pmx_wkup: pinmux@a00 { + compatible = "ti,omap3-padconf", + "pinctrl-single"; + reg = <0xa00 0x5c>; + #address-cells = <1>; + #size-cells = <0>; + #interrupt-cells = <1>; + interrupt-controller; + pinctrl-single,register-width = <16>; + pinctrl-single,function-mask = <0xff1f>; + }; + }; + }; + + aes: aes@480c5000 { + compatible = "ti,omap3-aes"; + ti,hwmods = "aes"; + reg = <0x480c5000 0x50>; + interrupts = <0>; + dmas = <&sdma 65 &sdma 66>; + dma-names = "tx", "rx"; + }; + + prm: prm@48306000 { + compatible = "ti,omap3-prm"; + reg = <0x48306000 0x4000>; + interrupts = <11>; + + prm_clocks: clocks { + #address-cells = <1>; + #size-cells = <0>; + }; + + prm_clockdomains: clockdomains { + }; + }; + + cm: cm@48004000 { + compatible = "ti,omap3-cm"; + reg = <0x48004000 0x4000>; + + cm_clocks: clocks { + #address-cells = <1>; + #size-cells = <0>; + }; + + cm_clockdomains: clockdomains { + }; + }; + + counter32k: counter@48320000 { + compatible = "ti,omap-counter32k"; + reg = <0x48320000 0x20>; + ti,hwmods = "counter_32k"; + }; + + intc: interrupt-controller@48200000 { + compatible = "ti,omap3-intc"; + interrupt-controller; + #interrupt-cells = <1>; + reg = <0x48200000 0x1000>; + }; + + sdma: dma-controller@48056000 { + compatible = "ti,omap3630-sdma", "ti,omap3430-sdma"; + reg = <0x48056000 0x1000>; + interrupts = <12>, + <13>, + <14>, + <15>; + #dma-cells = <1>; + dma-channels = <32>; + dma-requests = <96>; + }; + + pbias_regulator: pbias_regulator { + compatible = "ti,pbias-omap"; + reg = <0x2b0 0x4>; + syscon = <&scm_conf>; + pbias_mmc_reg: pbias_mmc_omap2430 { + regulator-name = "pbias_mmc_omap2430"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <3000000>; + }; + }; + + gpio1: gpio@48310000 { + compatible = "ti,omap3-gpio"; + reg = <0x48310000 0x200>; + interrupts = <29>; + ti,hwmods = "gpio1"; + ti,gpio-always-on; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + }; + + gpio2: gpio@49050000 { + compatible = "ti,omap3-gpio"; + reg = <0x49050000 0x200>; + interrupts = <30>; + ti,hwmods = "gpio2"; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + }; + + gpio3: gpio@49052000 { + compatible = "ti,omap3-gpio"; + reg = <0x49052000 0x200>; + interrupts = <31>; + ti,hwmods = "gpio3"; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + }; + + gpio4: gpio@49054000 { + compatible = "ti,omap3-gpio"; + reg = <0x49054000 0x200>; + interrupts = <32>; + ti,hwmods = "gpio4"; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + }; + + gpio5: gpio@49056000 { + compatible = "ti,omap3-gpio"; + reg = <0x49056000 0x200>; + interrupts = <33>; + ti,hwmods = "gpio5"; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + }; + + gpio6: gpio@49058000 { + compatible = "ti,omap3-gpio"; + reg = <0x49058000 0x200>; + interrupts = <34>; + ti,hwmods = "gpio6"; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + }; + + uart1: serial@4806a000 { + compatible = "ti,omap3-uart"; + reg = <0x4806a000 0x2000>; + interrupts-extended = <&intc 72>; + dmas = <&sdma 49 &sdma 50>; + dma-names = "tx", "rx"; + ti,hwmods = "uart1"; + clock-frequency = <48000000>; + }; + + uart2: serial@4806c000 { + compatible = "ti,omap3-uart"; + reg = <0x4806c000 0x400>; + interrupts-extended = <&intc 73>; + dmas = <&sdma 51 &sdma 52>; + dma-names = "tx", "rx"; + ti,hwmods = "uart2"; + clock-frequency = <48000000>; + }; + + uart3: serial@49020000 { + compatible = "ti,omap3-uart"; + reg = <0x49020000 0x400>; + interrupts-extended = <&intc 74>; + dmas = <&sdma 53 &sdma 54>; + dma-names = "tx", "rx"; + ti,hwmods = "uart3"; + clock-frequency = <48000000>; + }; + + i2c1: i2c@48070000 { + compatible = "ti,omap3-i2c"; + reg = <0x48070000 0x80>; + interrupts = <56>; + dmas = <&sdma 27 &sdma 28>; + dma-names = "tx", "rx"; + #address-cells = <1>; + #size-cells = <0>; + ti,hwmods = "i2c1"; + }; + + i2c2: i2c@48072000 { + compatible = "ti,omap3-i2c"; + reg = <0x48072000 0x80>; + interrupts = <57>; + dmas = <&sdma 29 &sdma 30>; + dma-names = "tx", "rx"; + #address-cells = <1>; + #size-cells = <0>; + ti,hwmods = "i2c2"; + }; + + i2c3: i2c@48060000 { + compatible = "ti,omap3-i2c"; + reg = <0x48060000 0x80>; + interrupts = <61>; + dmas = <&sdma 25 &sdma 26>; + dma-names = "tx", "rx"; + #address-cells = <1>; + #size-cells = <0>; + ti,hwmods = "i2c3"; + }; + + mailbox: mailbox@48094000 { + compatible = "ti,omap3-mailbox"; + ti,hwmods = "mailbox"; + reg = <0x48094000 0x200>; + interrupts = <26>; + #mbox-cells = <1>; + ti,mbox-num-users = <2>; + ti,mbox-num-fifos = <2>; + mbox_dsp: dsp { + ti,mbox-tx = <0 0 0>; + ti,mbox-rx = <1 0 0>; + }; + }; + + mcspi1: spi@48098000 { + compatible = "ti,omap2-mcspi"; + reg = <0x48098000 0x100>; + interrupts = <65>; + #address-cells = <1>; + #size-cells = <0>; + ti,hwmods = "mcspi1"; + ti,spi-num-cs = <4>; + dmas = <&sdma 35>, + <&sdma 36>, + <&sdma 37>, + <&sdma 38>, + <&sdma 39>, + <&sdma 40>, + <&sdma 41>, + <&sdma 42>; + dma-names = "tx0", "rx0", "tx1", "rx1", + "tx2", "rx2", "tx3", "rx3"; + }; + + mcspi2: spi@4809a000 { + compatible = "ti,omap2-mcspi"; + reg = <0x4809a000 0x100>; + interrupts = <66>; + #address-cells = <1>; + #size-cells = <0>; + ti,hwmods = "mcspi2"; + ti,spi-num-cs = <2>; + dmas = <&sdma 43>, + <&sdma 44>, + <&sdma 45>, + <&sdma 46>; + dma-names = "tx0", "rx0", "tx1", "rx1"; + }; + + mcspi3: spi@480b8000 { + compatible = "ti,omap2-mcspi"; + reg = <0x480b8000 0x100>; + interrupts = <91>; + #address-cells = <1>; + #size-cells = <0>; + ti,hwmods = "mcspi3"; + ti,spi-num-cs = <2>; + dmas = <&sdma 15>, + <&sdma 16>, + <&sdma 23>, + <&sdma 24>; + dma-names = "tx0", "rx0", "tx1", "rx1"; + }; + + mcspi4: spi@480ba000 { + compatible = "ti,omap2-mcspi"; + reg = <0x480ba000 0x100>; + interrupts = <48>; + #address-cells = <1>; + #size-cells = <0>; + ti,hwmods = "mcspi4"; + ti,spi-num-cs = <1>; + dmas = <&sdma 70>, <&sdma 71>; + dma-names = "tx0", "rx0"; + }; + + hdqw1w: 1w@480b2000 { + compatible = "ti,omap3-1w"; + reg = <0x480b2000 0x1000>; + interrupts = <58>; + ti,hwmods = "hdq1w"; + }; + + mmc1: mmc@4809c000 { + compatible = "ti,omap3-hsmmc"; + reg = <0x4809c000 0x200>; + interrupts = <83>; + ti,hwmods = "mmc1"; + ti,dual-volt; + dmas = <&sdma 61>, <&sdma 62>; + dma-names = "tx", "rx"; + pbias-supply = <&pbias_mmc_reg>; + }; + + mmc2: mmc@480b4000 { + compatible = "ti,omap3-hsmmc"; + reg = <0x480b4000 0x200>; + interrupts = <86>; + ti,hwmods = "mmc2"; + dmas = <&sdma 47>, <&sdma 48>; + dma-names = "tx", "rx"; + }; + + mmc3: mmc@480ad000 { + compatible = "ti,omap3-hsmmc"; + reg = <0x480ad000 0x200>; + interrupts = <94>; + ti,hwmods = "mmc3"; + dmas = <&sdma 77>, <&sdma 78>; + dma-names = "tx", "rx"; + }; + + mmu_isp: mmu@480bd400 { + #iommu-cells = <0>; + compatible = "ti,omap2-iommu"; + reg = <0x480bd400 0x80>; + interrupts = <24>; + ti,hwmods = "mmu_isp"; + ti,#tlb-entries = <8>; + }; + + mmu_iva: mmu@5d000000 { + #iommu-cells = <0>; + compatible = "ti,omap2-iommu"; + reg = <0x5d000000 0x80>; + interrupts = <28>; + ti,hwmods = "mmu_iva"; + status = "disabled"; + }; + + wdt2: wdt@48314000 { + compatible = "ti,omap3-wdt"; + reg = <0x48314000 0x80>; + ti,hwmods = "wd_timer2"; + }; + + mcbsp1: mcbsp@48074000 { + compatible = "ti,omap3-mcbsp"; + reg = <0x48074000 0xff>; + reg-names = "mpu"; + interrupts = <16>, /* OCP compliant interrupt */ + <59>, /* TX interrupt */ + <60>; /* RX interrupt */ + interrupt-names = "common", "tx", "rx"; + ti,buffer-size = <128>; + ti,hwmods = "mcbsp1"; + dmas = <&sdma 31>, + <&sdma 32>; + dma-names = "tx", "rx"; + status = "disabled"; + }; + + mcbsp2: mcbsp@49022000 { + compatible = "ti,omap3-mcbsp"; + reg = <0x49022000 0xff>, + <0x49028000 0xff>; + reg-names = "mpu", "sidetone"; + interrupts = <17>, /* OCP compliant interrupt */ + <62>, /* TX interrupt */ + <63>, /* RX interrupt */ + <4>; /* Sidetone */ + interrupt-names = "common", "tx", "rx", "sidetone"; + ti,buffer-size = <1280>; + ti,hwmods = "mcbsp2", "mcbsp2_sidetone"; + dmas = <&sdma 33>, + <&sdma 34>; + dma-names = "tx", "rx"; + status = "disabled"; + }; + + mcbsp3: mcbsp@49024000 { + compatible = "ti,omap3-mcbsp"; + reg = <0x49024000 0xff>, + <0x4902a000 0xff>; + reg-names = "mpu", "sidetone"; + interrupts = <22>, /* OCP compliant interrupt */ + <89>, /* TX interrupt */ + <90>, /* RX interrupt */ + <5>; /* Sidetone */ + interrupt-names = "common", "tx", "rx", "sidetone"; + ti,buffer-size = <128>; + ti,hwmods = "mcbsp3", "mcbsp3_sidetone"; + dmas = <&sdma 17>, + <&sdma 18>; + dma-names = "tx", "rx"; + status = "disabled"; + }; + + mcbsp4: mcbsp@49026000 { + compatible = "ti,omap3-mcbsp"; + reg = <0x49026000 0xff>; + reg-names = "mpu"; + interrupts = <23>, /* OCP compliant interrupt */ + <54>, /* TX interrupt */ + <55>; /* RX interrupt */ + interrupt-names = "common", "tx", "rx"; + ti,buffer-size = <128>; + ti,hwmods = "mcbsp4"; + dmas = <&sdma 19>, + <&sdma 20>; + dma-names = "tx", "rx"; + status = "disabled"; + }; + + mcbsp5: mcbsp@48096000 { + compatible = "ti,omap3-mcbsp"; + reg = <0x48096000 0xff>; + reg-names = "mpu"; + interrupts = <27>, /* OCP compliant interrupt */ + <81>, /* TX interrupt */ + <82>; /* RX interrupt */ + interrupt-names = "common", "tx", "rx"; + ti,buffer-size = <128>; + ti,hwmods = "mcbsp5"; + dmas = <&sdma 21>, + <&sdma 22>; + dma-names = "tx", "rx"; + status = "disabled"; + }; + + sham: sham@480c3000 { + compatible = "ti,omap3-sham"; + ti,hwmods = "sham"; + reg = <0x480c3000 0x64>; + interrupts = <49>; + dmas = <&sdma 69>; + dma-names = "rx"; + }; + + smartreflex_core: smartreflex@480cb000 { + compatible = "ti,omap3-smartreflex-core"; + ti,hwmods = "smartreflex_core"; + reg = <0x480cb000 0x400>; + interrupts = <19>; + }; + + smartreflex_mpu_iva: smartreflex@480c9000 { + compatible = "ti,omap3-smartreflex-iva"; + ti,hwmods = "smartreflex_mpu_iva"; + reg = <0x480c9000 0x400>; + interrupts = <18>; + }; + + timer1: timer@48318000 { + compatible = "ti,omap3430-timer"; + reg = <0x48318000 0x400>; + interrupts = <37>; + ti,hwmods = "timer1"; + ti,timer-alwon; + }; + + timer2: timer@49032000 { + compatible = "ti,omap3430-timer"; + reg = <0x49032000 0x400>; + interrupts = <38>; + ti,hwmods = "timer2"; + }; + + timer3: timer@49034000 { + compatible = "ti,omap3430-timer"; + reg = <0x49034000 0x400>; + interrupts = <39>; + ti,hwmods = "timer3"; + }; + + timer4: timer@49036000 { + compatible = "ti,omap3430-timer"; + reg = <0x49036000 0x400>; + interrupts = <40>; + ti,hwmods = "timer4"; + }; + + timer5: timer@49038000 { + compatible = "ti,omap3430-timer"; + reg = <0x49038000 0x400>; + interrupts = <41>; + ti,hwmods = "timer5"; + ti,timer-dsp; + }; + + timer6: timer@4903a000 { + compatible = "ti,omap3430-timer"; + reg = <0x4903a000 0x400>; + interrupts = <42>; + ti,hwmods = "timer6"; + ti,timer-dsp; + }; + + timer7: timer@4903c000 { + compatible = "ti,omap3430-timer"; + reg = <0x4903c000 0x400>; + interrupts = <43>; + ti,hwmods = "timer7"; + ti,timer-dsp; + }; + + timer8: timer@4903e000 { + compatible = "ti,omap3430-timer"; + reg = <0x4903e000 0x400>; + interrupts = <44>; + ti,hwmods = "timer8"; + ti,timer-pwm; + ti,timer-dsp; + }; + + timer9: timer@49040000 { + compatible = "ti,omap3430-timer"; + reg = <0x49040000 0x400>; + interrupts = <45>; + ti,hwmods = "timer9"; + ti,timer-pwm; + }; + + timer10: timer@48086000 { + compatible = "ti,omap3430-timer"; + reg = <0x48086000 0x400>; + interrupts = <46>; + ti,hwmods = "timer10"; + ti,timer-pwm; + }; + + timer11: timer@48088000 { + compatible = "ti,omap3430-timer"; + reg = <0x48088000 0x400>; + interrupts = <47>; + ti,hwmods = "timer11"; + ti,timer-pwm; + }; + + timer12: timer@48304000 { + compatible = "ti,omap3430-timer"; + reg = <0x48304000 0x400>; + interrupts = <95>; + ti,hwmods = "timer12"; + ti,timer-alwon; + ti,timer-secure; + }; + + usbhstll: usbhstll@48062000 { + compatible = "ti,usbhs-tll"; + reg = <0x48062000 0x1000>; + interrupts = <78>; + ti,hwmods = "usb_tll_hs"; + }; + + usbhshost: usbhshost@48064000 { + compatible = "ti,usbhs-host"; + reg = <0x48064000 0x400>; + ti,hwmods = "usb_host_hs"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + usbhsohci: ohci@48064400 { + compatible = "ti,ohci-omap3"; + reg = <0x48064400 0x400>; + interrupt-parent = <&intc>; + interrupts = <76>; + }; + + usbhsehci: ehci@48064800 { + compatible = "ti,ehci-omap"; + reg = <0x48064800 0x400>; + interrupt-parent = <&intc>; + interrupts = <77>; + }; + }; + + gpmc: gpmc@6e000000 { + compatible = "ti,omap3430-gpmc"; + ti,hwmods = "gpmc"; + reg = <0x6e000000 0x02d0>; + interrupts = <20>; + gpmc,num-cs = <8>; + gpmc,num-waitpins = <4>; + #address-cells = <2>; + #size-cells = <1>; + }; + + usb_otg_hs: usb_otg_hs@480ab000 { + compatible = "ti,omap3-musb"; + reg = <0x480ab000 0x1000>; + interrupts = <92>, <93>; + interrupt-names = "mc", "dma"; + ti,hwmods = "usb_otg_hs"; + multipoint = <1>; + num-eps = <16>; + ram-bits = <12>; + }; + + dss: dss@48050000 { + compatible = "ti,omap3-dss"; + reg = <0x48050000 0x200>; + status = "disabled"; + ti,hwmods = "dss_core"; + clocks = <&dss1_alwon_fck>; + clock-names = "fck"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + dispc@48050400 { + compatible = "ti,omap3-dispc"; + reg = <0x48050400 0x400>; + interrupts = <25>; + ti,hwmods = "dss_dispc"; + clocks = <&dss1_alwon_fck>; + clock-names = "fck"; + }; + + dsi: encoder@4804fc00 { + compatible = "ti,omap3-dsi"; + reg = <0x4804fc00 0x200>, + <0x4804fe00 0x40>, + <0x4804ff00 0x20>; + reg-names = "proto", "phy", "pll"; + interrupts = <25>; + status = "disabled"; + ti,hwmods = "dss_dsi1"; + clocks = <&dss1_alwon_fck>, <&dss2_alwon_fck>; + clock-names = "fck", "sys_clk"; + }; + + rfbi: encoder@48050800 { + compatible = "ti,omap3-rfbi"; + reg = <0x48050800 0x100>; + status = "disabled"; + ti,hwmods = "dss_rfbi"; + clocks = <&dss1_alwon_fck>, <&dss_ick>; + clock-names = "fck", "ick"; + }; + + venc: encoder@48050c00 { + compatible = "ti,omap3-venc"; + reg = <0x48050c00 0x100>; + status = "disabled"; + ti,hwmods = "dss_venc"; + clocks = <&dss_tv_fck>; + clock-names = "fck"; + }; + }; + + ssi: ssi-controller@48058000 { + compatible = "ti,omap3-ssi"; + ti,hwmods = "ssi"; + + status = "disabled"; + + reg = <0x48058000 0x1000>, + <0x48059000 0x1000>; + reg-names = "sys", + "gdd"; + + interrupts = <71>; + interrupt-names = "gdd_mpu"; + + #address-cells = <1>; + #size-cells = <1>; + ranges; + + ssi_port1: ssi-port@4805a000 { + compatible = "ti,omap3-ssi-port"; + + reg = <0x4805a000 0x800>, + <0x4805a800 0x800>; + reg-names = "tx", + "rx"; + + interrupt-parent = <&intc>; + interrupts = <67>, + <68>; + }; + + ssi_port2: ssi-port@4805b000 { + compatible = "ti,omap3-ssi-port"; + + reg = <0x4805b000 0x800>, + <0x4805b800 0x800>; + reg-names = "tx", + "rx"; + + interrupt-parent = <&intc>; + interrupts = <69>, + <70>; + }; + }; + }; +}; + +/include/ "omap3xxx-clocks.dtsi" -- cgit v1.2.3