rk3566—dtsi源码分析

#include 
#include 
#include 
#include 
#include 
#include 

/*前面这几个应该按键的配置*/
/ {
	adc_keys: adc-keys {
		compatible = "adc-keys";	
		io-channels = <&saradc 0>;
		io-channel-names = "buttons";
		keyup-threshold-microvolt = <1800000>;
		poll-interval = <100>;

		vol-up-key {
			label = "volume up";
			linux,code = <KEY_VOLUMEUP>;
			press-threshold-microvolt = <1750>;
		};

		vol-down-key {
			label = "volume down";
			linux,code = <KEY_VOLUMEDOWN>;
			press-threshold-microvolt = <297500>;
		};
	};

	audiopwmout_diff: audiopwmout-diff {
		status = "disabled";		/*默认状态*/
		compatible = "simple-audio-card";		/*用于匹配设备和驱动的名称*/
		simple-audio-card,format = "i2s";		
		simple-audio-card,name = "rockchip,audiopwmout-diff";
		simple-audio-card,mclk-fs = <256>;		//主控供给编解码芯片用的时钟
		simple-audio-card,bitclock-master = <&master>;	
		simple-audio-card,frame-master = <&master>;			
		simple-audio-card,cpu {
			sound-dai = <&i2s3_2ch>;		//指定cpu接入音频编解码的dai(数字化接口)
		};
		master: simple-audio-card,codec {
			sound-dai = <&dig_acodec>;		//指定编解码音频接入cpu的dai(数字化接口)
		};
	};

	backlight: backlight {		
		compatible = "pwm-backlight";		
		pwms = <&pwm4 0 25000 0>;	//屏幕背光接在PWM4上 index为0  周期25000 0为正极性
		/*因为pwm4下只有一个pwm 所以indx是0
		* 正极性 0 表示 背光为正极 0~255 ,占空比从 0~100% 变化:负极性 1 表示 背光为负极 255~0 ,占空比从 100~0% 变化
		*/
		brightness-levels = <
			  0  20  20  21  21  22  22  23
			 23  24  24  25  25  26  26  27
			 27  28  28  29  29  30  30  31
			 31  32  32  33  33  34  34  35
			 35  36  36  37  37  38  38  39
			 40  41  42  43  44  45  46  47
			 48  49  50  51  52  53  54  55
			 56  57  58  59  60  61  62  63
			 64  65  66  67  68  69  70  71
			 72  73  74  75  76  77  78  79
			 80  81  82  83  84  85  86  87
			 88  89  90  91  92  93  94  95
			 96  97  98  99 100 101 102 103
			104 105 106 107 108 109 110 111
			112 113 114 115 116 117 118 119
			120 121 122 123 124 125 126 127
			128 129 130 131 132 133 134 135
			136 137 138 139 140 141 142 143
			144 145 146 147 148 149 150 151
			152 153 154 155 156 157 158 159
			160 161 162 163 164 165 166 167
			168 169 170 171 172 173 174 175
			176 177 178 179 180 181 182 183
			184 185 186 187 188 189 190 191
			192 193 194 195 196 197 198 199
			200 201 202 203 204 205 206 207
			208 209 210 211 212 213 214 215
			216 217 218 219 220 221 222 223
			224 225 226 227 228 229 230 231
			232 233 234 235 236 237 238 239
			240 241 242 243 244 245 246 247
			248 249 250 251 252 253 254 255
		>;
		//默认的背光,它存在于开机时候背光初始化到安卓
		default-brightness-level = <200>;
		enable-gpios = <&gpio0 RK_PC1 GPIO_ACTIVE_HIGH>;
		//背光使能脚 根据原理图配置
	};
	
	buzzer { 
		compatible = "pwm-buzzer";
		pinctrl-names = "default";
		/* 看dts的注释代码可以理解*/
		pinctrl-0 = <&gpio3_a1 &gpio3_b5>;
		enable-gpios = <&gpio3 RK_PA1 GPIO_ACTIVE_HIGH>;
		pwren-gpios = <&gpio3 RK_PB5 GPIO_ACTIVE_HIGH>;
		pwms = <&pwm14 0 212765 0>;
		brightness-levels = <
			  0   1   2   3   4   5   6   7
			  8   9  10  11  12  13  14  15
			 16  17  18  19  20  21  22  23
			 24  25  26  27  28  29  30  31
			 32  33  34  35  36  37  38  39
			 40  41  42  43  44  45  46  47
			 48  49  50  51  52  53  54  55
			 56  57  58  59  60  61  62  63
			 64  65  66  67  68  69  70  71
			 72  73  74  75  76  77  78  79
			 80  81  82  83  84  85  86  87
			 88  89  90  91  92  93  94  95
			 96  97  98  99 100 101 102 103
			104 105 106 107 108 109 110 111
			112 113 114 115 116 117 118 119
			120 121 122 123 124 125 126 127
			128 129 130 131 132 133 134 135
			136 137 138 139 140 141 142 143
			144 145 146 147 148 149 150 151
			152 153 154 155 156 157 158 159
			160 161 162 163 164 165 166 167
			168 169 170 171 172 173 174 175
			176 177 178 179 180 181 182 183
			184 185 186 187 188 189 190 191
			192 193 194 195 196 197 198 199
			200 201 202 203 204 205 206 207
			208 209 210 211 212 213 214 215
			216 217 218 219 220 221 222 223
			224 225 226 227 228 229 230 231
			232 233 234 235 236 237 238 239
			240 241 242 243 244 245 246 247
			248 249 250 251 252 253 254 255>;
			default-brightness-level = <0>;
	};
		/* 控制充电相关的,可以参考对应的文档*/
        charge-animation {
                compatible = "rockchip,uboot-charge";
                /* 是否在u-boot下充电*/
                rockchip,uboot-charge-on = <0>;
                /* 是否在android下充电*/
                rockchip,android-charge-on = <1>;
                /* 最低充电电压*/
                rockchip,uboot-low-power-voltage = <3350>;
                /*最高充电电压*/
                rockchip,screen-on-voltage = <3400>;
                status = "okay";
        };

   /*这个不懂*/
	dc_12v: dc-12v {
		compatible = "regulator-fixed";
		regulator-name = "dc_12v";
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <12000000>;
		regulator-max-microvolt = <12000000>;
	};
	/* 声卡 */
	hdmi_sound: hdmi-sound {
		compatible = "simple-audio-card";
		/*控制总线*/
		simple-audio-card,format = "i2s";
		/*时钟频率*/
		simple-audio-card,mclk-fs = <128>;
		/* s声卡驱动的名字*/
		simple-audio-card,name = "rockchip,hdmi";
		/*默认状态*/
		status = "disabled";
		simple-audio-card,cpu {
				sound-dai = <&i2s0_8ch>; 
		};
		simple-audio-card,codec {
				sound-dai = <&hdmi>;
		};
	};
	
	/* 这也是一个驱动*/
	pdmics: dummy-codec {/*默认状态*/
		status = "disabled";
		/*用来匹配设备和驱动的名字dummy-codec 这个很重要 */
		compatible = "rockchip,dummy-codec";
		#sound-dai-cells = <0>;
	};
	/*一样的理解,驱动状态,用于匹配的名称*/
	pdm_mic_array: pdm-mic-array {
		status = "disabled";
		compatible = "simple-audio-card";
		simple-audio-card,name = "rockchip,pdm-mic-array";
		/*声卡链接cpu的编解码器*/
		simple-audio-card,cpu {
			sound-dai = <&pdm>;
		};
		simple-audio-card,codec {
			sound-dai = <&pdmics>;
		};
	};
	
	rk809_sound: rk809-sound {
		status = "okay";
		compatible = "simple-audio-card";
		simple-audio-card,format = "i2s";
		simple-audio-card,name = "rockchip,rk809-codec";
		simple-audio-card,mclk-fs = <256>;

		simple-audio-card,cpu {
			sound-dai = <&i2s1_8ch>;
		};
		simple-audio-card,codec {
			sound-dai = <&rk809_codec>;
		};
	};

	spdif-sound {
		status = "disabled";
		compatible = "simple-audio-card";
		simple-audio-card,name = "ROCKCHIP,SPDIF";
		simple-audio-card,cpu {
				sound-dai = <&spdif_8ch>;
		};
		simple-audio-card,codec {
				sound-dai = <&spdif_out>;
		};
	};
	
	vcc3v3_sys: vcc3v3-sys {
		compatible = "regulator-fixed";
		regulator-name = "vcc3v3_sys";
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		vin-supply = <&dc_12v>;
	};

	vcc5v0_sys: vcc5v0-sys {
		compatible = "regulator-fixed";
		regulator-name = "vcc5v0_sys";
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <5000000>;
		regulator-max-microvolt = <5000000>;
		vin-supply = <&dc_12v>;
	};

	vcc5v0_host: vcc5v0-host-regulator {
		compatible = "regulator-fixed";
		enable-active-high;
		//gpio = <&gpio0 RK_PA6 GPIO_ACTIVE_HIGH>;
		//pinctrl-names = "default";
		//pinctrl-0 = <&vcc5v0_host_en>;
        regulator-min-microvolt = <5000000>;
        regulator-max-microvolt = <5000000>;
		regulator-name = "vcc5v0_host";
		regulator-always-on;
		regulator-boot-on;
		vin-supply = <&vcc5v0_sys>;
	};

	vcc5v0_otg: vcc5v0-otg-regulator {
		compatible = "regulator-fixed";
		enable-active-high;
		gpio = <&gpio0 RK_PA5 GPIO_ACTIVE_HIGH>;
		pinctrl-names = "default";
		pinctrl-0 = <&vcc5v0_otg_en>;
		regulator-name = "vcc5v0_otg";
	};

	sdio_pwrseq: sdio-pwrseq {
		compatible = "mmc-pwrseq-simple";
		clocks = <&rk809 1>;
		clock-names = "ext_clock";
		pinctrl-names = "default";
		pinctrl-0 = <&wifi_enable_h>;

		/*
		 * On the module itself this is one of these (depending
		 * on the actual card populated):
		 * - SDIO_RESET_L_WL_REG_ON
		 * - PDN (power down when low)
		 */
		post-power-on-delay-ms = <200>;
		reset-gpios = <&gpio2 RK_PB1 GPIO_ACTIVE_LOW>;
	};

	wireless_wlan: wireless-wlan {
		compatible = "wlan-platdata";
		rockchip,grf = <&grf>;
		wifi_chip_type = "ap6256";
		status = "okay";
	};

	wireless_bluetooth: wireless-bluetooth {
		compatible = "bluetooth-platdata";
		clocks = <&rk809 1>;
		clock-names = "ext_clock";
		//wifi-bt-power-toggle;
		uart_rts_gpios = <&gpio2 RK_PB5 GPIO_ACTIVE_LOW>;
		pinctrl-names = "default", "rts_gpio";
		pinctrl-0 = <&uart8m0_rtsn>;
		pinctrl-1 = <&uart8_gpios>;
		BT,reset_gpio    = <&gpio2 RK_PB7 GPIO_ACTIVE_HIGH>;
		BT,wake_gpio     = <&gpio3 RK_PC1 GPIO_ACTIVE_HIGH>;
		BT,wake_host_irq = <&gpio3 RK_PC0 GPIO_ACTIVE_HIGH>;
		status = "okay";
	};

	test-power {
		status = "okay";
	};
};
/* 追加的说明 */
&bus_npu {
	bus-supply = <&vdd_logic>;
	pvtm-supply = <&vdd_cpu>;
	status = "okay";
};

&can0 {
	assigned-clocks = <&cru CLK_CAN0>;
	assigned-clock-rates = <150000000>;
	pinctrl-names = "default";
	pinctrl-0 = <&can0m1_pins>;
	status = "disabled";
};

&can1 {
	assigned-clocks = <&cru CLK_CAN1>;
	assigned-clock-rates = <150000000>;
	pinctrl-names = "default";
	pinctrl-0 = <&can1m1_pins>;
	status = "disabled";
};

&can2 {
	assigned-clocks = <&cru CLK_CAN2>;
	assigned-clock-rates = <150000000>;
	pinctrl-names = "default";
	pinctrl-0 = <&can2m1_pins>;
	status = "disabled";
};

&cpu0 {
	cpu-supply = <&vdd_cpu>;
};

&dfi {
	status = "disabled";
};

&dmc {
	center-supply = <&vdd_logic>;
	status = "disabled";
};

&gpu {
	mali-supply = <&vdd_gpu>;
	status = "okay";
};

&hdmi {
	status = "disabled";
	rockchip,phy-table =
		<92812500  0x8009 0x0000 0x0270>,
		<165000000 0x800b 0x0000 0x026d>,
		<185625000 0x800b 0x0000 0x01ed>,
		<297000000 0x800b 0x0000 0x01ad>,
		<594000000 0x8029 0x0000 0x0088>,
		<000000000 0x0000 0x0000 0x0000>;
};

&hdmi_in_vp0 {
	status = "disabled";
};

&hdmi_in_vp1 {
	status = "disabled";
};

&hdmi_sound {
	status = "disabled";
};
/*追加的根节点和子节点*/
&i2c0 {
	status = "okay";

	vdd_cpu: tcs4525@1c {
		compatible = "tcs,tcs452x";
		reg = <0x1c>;
		vin-supply = <&vcc5v0_sys>;
		regulator-compatible = "fan53555-reg";
		regulator-name = "vdd_cpu";
		regulator-min-microvolt = <712500>;
		regulator-max-microvolt = <1390000>;
		regulator-init-microvolt = <900000>;
		regulator-ramp-delay = <2300>;
		fcs,suspend-voltage-selector = <1>;
		regulator-boot-on;
		regulator-always-on;
		regulator-state-mem {
			regulator-off-in-suspend;
		};
	};

	rk809: pmic@20 {
		compatible = "rockchip,rk809";
		reg = <0x20>;
		interrupt-parent = <&gpio0>;
		interrupts = <3 IRQ_TYPE_LEVEL_LOW>;

		pinctrl-names = "default", "pmic-sleep",
				"pmic-power-off", "pmic-reset";
		pinctrl-0 = <&pmic_int>;
		pinctrl-1 = <&soc_slppin_slp>, <&rk817_slppin_slp>;
		pinctrl-2 = <&soc_slppin_gpio>, <&rk817_slppin_pwrdn>;
		pinctrl-3 = <&soc_slppin_gpio>, <&rk817_slppin_rst>;

		rockchip,system-power-controller;
		wakeup-source;
		#clock-cells = <1>;
		clock-output-names = "rk808-clkout1", "rk808-clkout2";
		//fb-inner-reg-idxs = <2>;
		/* 1: rst regs (default in codes), 0: rst the pmic */
		pmic-reset-func = <0>;
		/* not save the PMIC_POWER_EN register in uboot */
		not-save-power-en = <1>;

		vcc1-supply = <&vcc3v3_sys>;
		vcc2-supply = <&vcc3v3_sys>;
		vcc3-supply = <&vcc3v3_sys>;
		vcc4-supply = <&vcc3v3_sys>;
		vcc5-supply = <&vcc3v3_sys>;
		vcc6-supply = <&vcc3v3_sys>;
		vcc7-supply = <&vcc3v3_sys>;
		vcc8-supply = <&vcc3v3_sys>;
		vcc9-supply = <&vcc3v3_sys>;

		pwrkey {
			status = "okay";
		};

		pinctrl_rk8xx: pinctrl_rk8xx {
			gpio-controller;
			#gpio-cells = <2>;

			rk817_slppin_null: rk817_slppin_null {
				pins = "gpio_slp";
				function = "pin_fun0";
			};

			rk817_slppin_slp: rk817_slppin_slp {
				pins = "gpio_slp";
				function = "pin_fun1";
			};

			rk817_slppin_pwrdn: rk817_slppin_pwrdn {
				pins = "gpio_slp";
				function = "pin_fun2";
			};

			rk817_slppin_rst: rk817_slppin_rst {
				pins = "gpio_slp";
				function = "pin_fun3";
			};
		};

		regulators {
			vdd_logic: DCDC_REG1 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <500000>;
				regulator-max-microvolt = <1350000>;
				regulator-init-microvolt = <900000>;
				regulator-ramp-delay = <6001>;
				regulator-initial-mode = <0x2>;
				regulator-name = "vdd_logic";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vdd_gpu: DCDC_REG2 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <500000>;
				regulator-max-microvolt = <1350000>;
				regulator-init-microvolt = <900000>;
				regulator-ramp-delay = <6001>;
				regulator-initial-mode = <0x2>;
				regulator-name = "vdd_gpu";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc_ddr: DCDC_REG3 {
				regulator-always-on;
				regulator-boot-on;
				regulator-initial-mode = <0x2>;
				regulator-name = "vcc_ddr";
				regulator-state-mem {
					regulator-on-in-suspend;
				};
			};

			vdd_npu: DCDC_REG4 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <500000>;
				regulator-max-microvolt = <1350000>;
				regulator-init-microvolt = <900000>;
				regulator-ramp-delay = <6001>;
				regulator-initial-mode = <0x2>;
				regulator-name = "vdd_npu";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vdda0v9_image: LDO_REG1 {
				regulator-boot-on;
				regulator-always-on;
				regulator-min-microvolt = <900000>;
				regulator-max-microvolt = <900000>;
				regulator-name = "vdda0v9_image";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vdda_0v9: LDO_REG2 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <900000>;
				regulator-max-microvolt = <900000>;
				regulator-name = "vdda_0v9";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vdda0v9_pmu: LDO_REG3 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <900000>;
				regulator-max-microvolt = <900000>;
				regulator-name = "vdda0v9_pmu";
				regulator-state-mem {
					regulator-on-in-suspend;
					regulator-suspend-microvolt = <900000>;
				};
			};

			vccio_acodec: LDO_REG4 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <3300000>;
				regulator-max-microvolt = <3300000>;
				regulator-name = "vccio_acodec";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vccio_sd: LDO_REG5 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <3300000>;
				regulator-name = "vccio_sd";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc3v3_pmu: LDO_REG6 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <3300000>;
				regulator-max-microvolt = <3300000>;
				regulator-name = "vcc3v3_pmu";
				regulator-state-mem {
					regulator-on-in-suspend;
					regulator-suspend-microvolt = <3300000>;
				};
			};

			vcca_1v8: LDO_REG7 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <1800000>;
				regulator-name = "vcca_1v8";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcca1v8_pmu: LDO_REG8 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <1800000>;
				regulator-name = "vcca1v8_pmu";
				regulator-state-mem {
					regulator-on-in-suspend;
					regulator-suspend-microvolt = <1800000>;
				};
			};

			vcca1v8_image: LDO_REG9 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <1800000>;
				regulator-name = "vcca1v8_image";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc_1v8: DCDC_REG5 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <1800000>;
				regulator-name = "vcc_1v8";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc_3v3: SWITCH_REG1 {
				regulator-always-on;
				regulator-boot-on;
				regulator-name = "vcc_3v3";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc3v3_sd: SWITCH_REG2 {
				regulator-always-on;
				regulator-boot-on;
				regulator-name = "vcc3v3_sd";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};
		};

		rk809_codec: codec {
			#sound-dai-cells = <0>;
			compatible = "rockchip,rk809-codec", "rockchip,rk817-codec";
			clocks = <&cru I2S1_MCLKOUT>;
			clock-names = "mclk";
			assigned-clocks = <&cru I2S1_MCLKOUT>, <&cru I2S1_MCLK_TX_IOE>;
			assigned-clock-rates = <12288000>;
			assigned-clock-parents = <&cru I2S1_MCLKOUT_TX>, <&cru I2S1_MCLKOUT_TX>;
			pinctrl-names = "default";
			pinctrl-0 = <&i2s1m0_mclk>;
			hp-volume = <20>;
			spk-volume = <3>;
			mic-in-differential;
			status = "okay";
		};

                battery {
                        compatible = "rk817,battery";
                        ocv_table = <3400 3513 3578 3687 3734 3752 3763
                                     3766 3771 3784 3804 3836 3885 3925
                                     3962 4005 4063 4114 4169 4227 4303>;
                        design_capacity = <2600>;
                        design_qmax = <2750>;
                        bat_res = <100>;
                        sleep_enter_current = <300>;
                        sleep_exit_current = <300>;
                        sleep_filter_current = <100>;
                        power_off_thresd = <3500>;
                        zero_algorithm_vol = <3850>;
                        max_soc_offset = <60>;
                        monitor_sec = <5>;
                        sample_res = <10>;
			bat_res_up = <68>;
			bat_res_down = <20>;
                        virtual_power = <0>;
			register_chg_psy = <0>;
			design_max_voltage = <4000>;
			bat-det-gpios = <&gpio3 RK_PA2 GPIO_ACTIVE_LOW>;
			bat-reverse-gpios = <&gpio4 RK_PC3 GPIO_ACTIVE_LOW>;	      
                };

	};

	bq24195@6b {
	        compatible = "ti,bq24195";
	        reg = <0x6b>;
		pinctrl-names = "default";
		pinctrl-0 = <&gpio_b7 &gpio4_c7 &gpio2_a1 &charger_ok_int>;
		interrupt-parent = <&gpio4>;
		interrupts = <RK_PC5 IRQ_TYPE_LEVEL_LOW>;
		ti,charge-current = <1500000>;
		current_in_limit = <1500000>;
		current_term_limit = <128000>;
		charge_v_limit = <4208000>;
		charge_fi_limit = <832000>;
		charge-det-gpios = <&gpio2 RK_PA1 GPIO_ACTIVE_LOW>;
		otg-pwr-gpios = <&gpio4 RK_PC7 GPIO_ACTIVE_HIGH>;
		charge-en-gpios = <&gpio0 RK_PB7 GPIO_ACTIVE_LOW>;
	};
};



&i2s0_8ch {
	status = "okay";
};

&i2s1_8ch {
	status = "okay";
	rockchip,clk-trcm = <1>;
	pinctrl-names = "default";
	pinctrl-0 = <&i2s1m0_sclktx
		     &i2s1m0_lrcktx
		     &i2s1m0_sdi0
		     &i2s1m0_sdo0>;
};

&iep {
	status = "okay";
};

&iep_mmu {
	status = "okay";
};

&jpegd {
	status = "okay";
};

&jpegd_mmu {
	status = "okay";
};

&mpp_srv {
	status = "okay";
};

&nandc0 {
	#address-cells = <1>;
	#size-cells = <0>;
	status = "okay";

	nand@0 {
		reg = <0>;
		nand-bus-width = <8>;
		nand-ecc-mode = "hw";
		nand-ecc-strength = <16>;
		nand-ecc-step-size = <1024>;
	};
};
/* pinctrl 子系统的控制,用来控制gpiod模式*/
&pinctrl {

	charger {
		gpio_b7: gpio_b7 {
			rockchip,pins =
				<0 RK_PB7 RK_FUNC_GPIO &pcfg_pull_none>;
		};

		gpio4_c7: gpio4_c7 {
			rockchip,pins =
				<4 RK_PC7 RK_FUNC_GPIO &pcfg_pull_none>;
		};

		gpio2_a1: gpio2_a1 {
			rockchip,pins =
				<2 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>;
		};

		charger_ok_int: charger_ok_int {
			rockchip,pins =
				<4 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};


	buzzer {
		gpio3_a1: gpio3-a1 {
			rockchip,pins = <3 RK_PA1 RK_FUNC_GPIO &pcfg_pull_up>;
		};

		gpio3_b5: gpio3-b5 {
			rockchip,pins = <3 RK_PB5 RK_FUNC_GPIO &pcfg_pull_up>;
		};

	};

	mxc6655xa {
		mxc6655xa_irq_gpio: mxc6655xa_irq_gpio {
			rockchip,pins = <3 RK_PC1 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	pmic {
		pmic_int: pmic_int {
			rockchip,pins =
				<0 RK_PA3 RK_FUNC_GPIO &pcfg_pull_up>;
		};

		soc_slppin_gpio: soc_slppin_gpio {
			rockchip,pins =
				<0 RK_PA2 RK_FUNC_GPIO &pcfg_output_low>;
		};

		soc_slppin_slp: soc_slppin_slp {
			rockchip,pins =
				<0 RK_PA2 1 &pcfg_pull_none>;
		};

		soc_slppin_rst: soc_slppin_rst {
			rockchip,pins =
				<0 RK_PA2 2 &pcfg_pull_none>;
		};
	};

	touch {
		touch_gpio: touch-gpio {
			rockchip,pins =
				<0 RK_PB5 RK_FUNC_GPIO &pcfg_pull_up>,
				<0 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	sdio-pwrseq {
		wifi_enable_h: wifi-enable-h {
			rockchip,pins = <2 RK_PB1 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	usb {
		vcc5v0_host_en: vcc5v0-host-en {
			rockchip,pins = <0 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
		};

		vcc5v0_otg_en: vcc5v0-otg-en {
			rockchip,pins = <0 RK_PA5 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	wireless-bluetooth {
		uart8_gpios: uart8-gpios {
			rockchip,pins = <2 RK_PB5 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};
};

&pmu_io_domains {
	status = "okay";
	pmuio1-supply = <&vcc3v3_pmu>;
	pmuio2-supply = <&vcc3v3_pmu>;
	vccio1-supply = <&vccio_acodec>;
	vccio3-supply = <&vccio_sd>;
	vccio4-supply = <&vcc_1v8>;
	vccio5-supply = <&vcc_3v3>;
	vccio6-supply = <&vcc_1v8>;
	vccio7-supply = <&vcc_3v3>;
};

&pwm4 {
	status = "okay";
};

&pwm14 {
	status = "okay";
};

&rk_rga {
	status = "okay";
};

&rkvdec {
	status = "okay";
};

&rkvdec_mmu {
	status = "okay";
};

&rkvenc {
	venc-supply = <&vdd_logic>;
	status = "okay";
};

&rkvenc_mmu {
	status = "okay";
};

&rknpu {
	rknpu-supply = <&vdd_npu>;
	status = "okay";
};

&rknpu_mmu {
	status = "okay";
};
/*
&route_hdmi {
	status = "okay";
	connect = <&vp0_out_hdmi>;
};
*/
&saradc {
	status = "okay";
	vref-supply = <&vcca_1v8>;
};

&sdhci {
	bus-width = <8>;
	supports-emmc;
	non-removable;
	rockchip,txclk-tapnum = <0x8>;
	max-frequency = <200000000>;
	status = "okay";
};

&sdmmc0 {
	max-frequency = <150000000>;
	supports-sd;
	bus-width = <4>;
	cap-mmc-highspeed;
	cap-sd-highspeed;
	disable-wp;
	sd-uhs-sdr104;
	vmmc-supply = <&vcc3v3_sd>;
	vqmmc-supply = <&vccio_sd>;
	pinctrl-names = "default";
	pinctrl-0 = <&sdmmc0_bus4 &sdmmc0_clk &sdmmc0_cmd &sdmmc0_det>;
	status = "okay";
};

&sfc {
	status = "okay";
};
/*
&spdif_8ch {
	status = "okay";
};
*/
&tsadc {
	status = "okay";
};

&u2phy0_host {
	phy-supply = <&vcc5v0_host>;
	status = "okay";
};

&u2phy0_otg {
	vbus-supply = <&vcc5v0_otg>;
	status = "okay";
};

&u2phy1_host {
	phy-supply = <&vcc5v0_host>;
	status = "okay";
};

&u2phy1_otg {
	phy-supply = <&vcc5v0_host>;
	status = "okay";
};

&usb2phy0 {
	status = "okay";
};

&usb2phy1 {
	status = "okay";
};

&usb_host0_ehci {
	status = "okay";
};

&usb_host0_ohci {
	status = "okay";
};

&usb_host1_ehci {
	status = "okay";
};

&usb_host1_ohci {
	status = "okay";
};

&usbdrd_dwc3 {
	status = "okay";
};

&usbdrd30 {
	status = "okay";
};

&usbhost_dwc3 {
	status = "okay";
};

&usbhost30 {
	status = "okay";
};

&vad {
	rockchip,audio-src = <&i2s1_8ch>;
	rockchip,buffer-time-ms = <128>;
	rockchip,det-channel = <0>;
	rockchip,mode = <0>;
};

&vdpu {
	status = "okay";
};

&vdpu_mmu {
	status = "okay";
};

&vepu {
	status = "okay";
};

&vepu_mmu {
	status = "okay";
};

&vop {
	status = "okay";
	assigned-clocks = <&cru DCLK_VOP0>, <&cru DCLK_VOP1>;
	assigned-clock-parents = <&pmucru PLL_HPLL>, <&cru PLL_VPLL>;
};

&vop_mmu {
	status = "okay";
};

代码大概就是这样理解的,然后很多的函数的调用都需要自己去找。
代码可以去bootlin上面看,我这里的可能有残缺。

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