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[plain] view plain copy 在CODE上查看代码片派生到我的代码片
-
http://blog.csdn.net/shichaog/article/details/51249106
-
/*
-
* Skeleton device tree; the bare minimum needed to boot; just include and
-
* add a compatible value. The bootloader will typically populate the memory
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* node.
-
*/
-
-
/ {
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#address-cells = <1>;
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#size-cells = <1>;
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chosen { };
-
aliases { };
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memory { device_type = "memory"; reg = <0 0>; };
- };
这是32位体系架构的设备树的skeleton,address-cells那行表示的是用32bit表示地址,寄存器也是用32bit来表示。接下来设备树里的东西是和zynq-7000这款芯片cpu息息相关的定义。将cpu以及外设都定义在此处。
[plain] view plain copy 在CODE上查看代码片派生到我的代码片
《zynq-7000.dtsi》
-
1 /*
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2 * Copyright (C) 2011 - 2014 Xilinx
-
3 *
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4 * This software is licensed under the terms of the GNU General Public
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5 * License version 2, as published by the Free Software Foundation, and
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6 * may be copied, distributed, and modified under those terms.
-
7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
-
12 */
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13 /include/ "skeleton.dtsi"
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14
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15 / {
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16 compatible = "xlnx,zynq-7000";
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17
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18 cpus {
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19 #address-cells = <1>;
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20 #size-cells = <0>;
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21
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22 cpu@0 {
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23 compatible = "arm,cortex-a9";
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24 device_type = "cpu";
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25 reg = <0>;
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26 clocks = <&clkc 3>;
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27 clock-latency = <1000>;
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28 cpu0-supply = <®ulator_vccpint>;
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29 operating-points = <
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30 /* kHz uV */
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31 666667 1000000
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32 333334 1000000
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33 >;
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34 };
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35
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36 cpu@1 {
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37 compatible = "arm,cortex-a9";
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38 device_type = "cpu";
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39 reg = <1>;
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40 clocks = <&clkc 3>;
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41 };
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42 };
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43
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44 pmu {
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45 compatible = "arm,cortex-a9-pmu";
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46 interrupts = <0 5 4>, <0 6 4>;
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47 interrupt-parent = <&intc>;
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48 reg = < 0xf8891000 0x1000 0xf8893000 0x1000 >;
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49 };
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50
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51 regulator_vccpint: fixedregulator@0 {
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52 compatible = "regulator-fixed";
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53 regulator-name = "VCCPINT";
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54 regulator-min-microvolt = <1000000>;
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55 regulator-max-microvolt = <1000000>;
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56 regulator-boot-on;
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57 regulator-always-on;
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58 };
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59
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60 amba: amba {
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61 compatible = "simple-bus";
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62 #address-cells = <1>;
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63 #size-cells = <1>;
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64 interrupt-parent = <&intc>;
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65 ranges;
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66
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67 adc: adc@f8007100 {
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68 compatible = "xlnx,zynq-xadc-1.00.a";
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69 reg = <0xf8007100 0x20>;
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70 interrupts = <0 7 4>;
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71 interrupt-parent = <&intc>;
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72 clocks = <&clkc 12>;
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73 };
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74
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75 can0: can@e0008000 {
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76 compatible = "xlnx,zynq-can-1.0";
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77 status = "disabled";
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78 clocks = <&clkc 19>, <&clkc 36>;
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79 clock-names = "can_clk", "pclk";
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80 reg = <0xe0008000 0x1000>;
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81 interrupts = <0 28 4>;
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82 interrupt-parent = <&intc>;
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83 tx-fifo-depth = <0x40>;
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84 rx-fifo-depth = <0x40>;
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85 };
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86
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87 can1: can@e0009000 {
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88 compatible = "xlnx,zynq-can-1.0";
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89 status = "disabled";
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90 clocks = <&clkc 20>, <&clkc 37>;
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91 clock-names = "can_clk", "pclk";
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92 reg = <0xe0009000 0x1000>;
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93 interrupts = <0 51 4>;
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94 interrupt-parent = <&intc>;
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95 tx-fifo-depth = <0x40>;
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96 rx-fifo-depth = <0x40>;
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97 };
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98
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99 gpio0: gpio@e000a000 {
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100 compatible = "xlnx,zynq-gpio-1.0";
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101 #gpio-cells = <2>;
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102 #interrupt-cells = <2>;
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103 clocks = <&clkc 42>;
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104 gpio-controller;
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105 interrupt-controller;
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106 interrupt-parent = <&intc>;
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107 interrupts = <0 20 4>;
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108 reg = <0xe000a000 0x1000>;
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109 };
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110
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111 i2c0: i2c@e0004000 {
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112 compatible = "cdns,i2c-r1p10";
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113 status = "disabled";
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114 clocks = <&clkc 38>;
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115 interrupt-parent = <&intc>;
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116 interrupts = <0 25 4>;
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117 reg = <0xe0004000 0x1000>;
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118 #address-cells = <1>;
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119 #size-cells = <0>;
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120 };
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121
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122 i2c1: i2c@e0005000 {
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123 compatible = "cdns,i2c-r1p10";
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124 status = "disabled";
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125 clocks = <&clkc 39>;
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126 interrupt-parent = <&intc>;
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127 interrupts = <0 48 4>;
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128 reg = <0xe0005000 0x1000>;
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129 #address-cells = <1>;
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130 #size-cells = <0>;
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131 };
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132
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133 intc: interrupt-controller@f8f01000 {
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134 compatible = "arm,cortex-a9-gic";
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135 #interrupt-cells = <3>;
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136 interrupt-controller;
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137 reg = <0xF8F01000 0x1000>,
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138 <0xF8F00100 0x100>;
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139 };
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140
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141 L2: cache-controller@f8f02000 {
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142 compatible = "arm,pl310-cache";
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143 reg = <0xF8F02000 0x1000>;
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144 interrupts = <0 2 4>;
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145 arm,data-latency = <3 2 2>;
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146 arm,tag-latency = <2 2 2>;
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147 cache-unified;
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148 cache-level = <2>;
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149 };
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150
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151 mc: memory-controller@f8006000 {
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152 compatible = "xlnx,zynq-ddrc-a05";
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153 reg = <0xf8006000 0x1000>;
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154 };
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155
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156 ocmc: ocmc@f800c000 {
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157 compatible = "xlnx,zynq-ocmc-1.0";
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158 interrupt-parent = <&intc>;
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159 interrupts = <0 3 4>;
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160 reg = <0xf800c000 0x1000>;
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161 };
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162
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163 uart0: serial@e0000000 {
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164 compatible = "xlnx,xuartps", "cdns,uart-r1p8";
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165 status = "disabled";
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166 clocks = <&clkc 23>, <&clkc 40>;
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167 clock-names = "uart_clk", "pclk";
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168 reg = <0xE0000000 0x1000>;
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169 interrupts = <0 27 4>;
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170 };
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171
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172 uart1: serial@e0001000 {
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173 compatible = "xlnx,xuartps", "cdns,uart-r1p8";
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174 status = "disabled";
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175 clocks = <&clkc 24>, <&clkc 41>;
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176 clock-names = "uart_clk", "pclk";
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177 reg = <0xE0001000 0x1000>;
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178 interrupts = <0 50 4>;
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179 };
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180
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181 spi0: spi@e0006000 {
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182 compatible = "xlnx,zynq-spi-r1p6";
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183 reg = <0xe0006000 0x1000>;
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184 status = "disabled";
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185 interrupt-parent = <&intc>;
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186 interrupts = <0 26 4>;
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187 clocks = <&clkc 25>, <&clkc 34>;
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188 clock-names = "ref_clk", "pclk";
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189 #address-cells = <1>;
-
190 #size-cells = <0>;
-
191 };
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192
-
193 spi1: spi@e0007000 {
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194 compatible = "xlnx,zynq-spi-r1p6";
-
195 reg = <0xe0007000 0x1000>;
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196 status = "disabled";
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197 interrupt-parent = <&intc>;
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198 interrupts = <0 49 4>;
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199 clocks = <&clkc 26>, <&clkc 35>;
-
200 clock-names = "ref_clk", "pclk";
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201 #address-cells = <1>;
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202 #size-cells = <0>;
-
203 };
-
204
-
205 qspi: spi@e000d000 {
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206 clock-names = "ref_clk", "pclk";
-
207 clocks = <&clkc 10>, <&clkc 43>;
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208 compatible = "xlnx,zynq-qspi-1.0";
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209 status = "disabled";
-
210 interrupt-parent = <&intc>;
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211 interrupts = <0 19 4>;
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212 reg = <0xe000d000 0x1000>;
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213 #address-cells = <1>;
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214 #size-cells = <0>;
-
215 };
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216
-
217 smcc: memory-controller@e000e000 {
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218 #address-cells = <1>;
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219 #size-cells = <1>;
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220 status = "disabled";
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221 clock-names = "memclk", "aclk";
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222 clocks = <&clkc 11>, <&clkc 44>;
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223 compatible = "arm,pl353-smc-r2p1";
-
224 interrupt-parent = <&intc>;
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225 interrupts = <0 18 4>;
-
226 ranges ;
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227 reg = <0xe000e000 0x1000>;
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228 nand0: flash@e1000000 {
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229 status = "disabled";
-
230 compatible = "arm,pl353-nand-r2p1";
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231 reg = <0xe1000000 0x1000000>;
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232 #address-cells = <0x1>;
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233 #size-cells = <0x1>;
-
234 };
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235 nor0: flash@e2000000 {
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236 status = "disabled";
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237 compatible = "cfi-flash";
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238 reg = <0xe2000000 0x2000000>;
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239 #address-cells = <1>;
-
240 #size-cells = <1>;
-
241 };
-
242 };
-
243
-
244 gem0: ethernet@e000b000 {
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245 compatible = "cdns,zynq-gem", "cdns,gem";
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246 reg = <0xe000b000 0x1000>;
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247 status = "disabled";
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248 interrupts = <0 22 4>;
-
249 clocks = <&clkc 30>, <&clkc 30>, <&clkc 13>;
-
250 clock-names = "pclk", "hclk", "tx_clk";
-
251 #address-cells = <1>;
-
252 #size-cells = <0>;
-
253 };
-
254
-
255 gem1: ethernet@e000c000 {
-
256 compatible = "cdns,zynq-gem", "cdns,gem";
-
257 reg = <0xe000c000 0x1000>;
-
258 status = "disabled";
-
259 interrupts = <0 45 4>;
-
260 clocks = <&clkc 31>, <&clkc 31>, <&clkc 14>;
-
261 clock-names = "pclk", "hclk", "tx_clk";
-
262 #address-cells = <1>;
-
263 #size-cells = <0>;
-
264 };
-
265
-
266 sdhci0: sdhci@e0100000 {
-
267 compatible = "arasan,sdhci-8.9a";
-
268 status = "disabled";
-
269 clock-names = "clk_xin", "clk_ahb";
-
270 clocks = <&clkc 21>, <&clkc 32>;
-
271 interrupt-parent = <&intc>;
-
272 interrupts = <0 24 4>;
-
273 reg = <0xe0100000 0x1000>;
-
274 };
-
275
-
276 sdhci1: sdhci@e0101000 {
-
277 compatible = "arasan,sdhci-8.9a";
-
278 status = "disabled";
-
279 clock-names = "clk_xin", "clk_ahb";
-
280 clocks = <&clkc 22>, <&clkc 33>;
-
281 interrupt-parent = <&intc>;
-
282 interrupts = <0 47 4>;
-
283 reg = <0xe0101000 0x1000>;
-
284 };
-
285
-
286 slcr: slcr@f8000000 {
-
287 #address-cells = <1>;
-
288 #size-cells = <1>;
-
289 compatible = "xlnx,zynq-slcr", "syscon", "simple-bus";
-
290 reg = <0xF8000000 0x1000>;
-
291 ranges;
-
292 clkc: clkc@100 {
-
293 #clock-cells = <1>;
-
294 compatible = "xlnx,ps7-clkc";
-
295 fclk-enable = <0xf>;
-
296 clock-output-names = "armpll", "ddrpll", "iopll", "cpu_6or4x",
-
297 "cpu_3or2x", "cpu_2x", "cpu_1x", "ddr2x", "ddr3x",
-
298 "dci", "lqspi", "smc", "pcap", "gem0", "gem1",
-
299 "fclk0", "fclk1", "fclk2", "fclk3", "can0", "can1",
-
300 "sdio0", "sdio1", "uart0", "uart1", "spi0", "spi1",
-
301 "dma", "usb0_aper", "usb1_aper", "gem0_aper",
-
302 "gem1_aper", "sdio0_aper", "sdio1_aper",
-
303 "spi0_aper", "spi1_aper", "can0_aper", "can1_aper",
-
304 "i2c0_aper", "i2c1_aper", "uart0_aper", "uart1_aper",
-
305 "gpio_aper", "lqspi_aper", "smc_aper", "swdt",
-
306 "dbg_trc", "dbg_apb";
-
307 reg = <0x100 0x100>;
-
308 };
-
309
-
310 rstc: rstc@200 {
-
311 compatible = "xlnx,zynq-reset";
-
312 reg = <0x200 0x48>;
-
313 #reset-cells = <1>;
-
314 syscon = <&slcr>;
-
315 };
-
316
-
317 pinctrl0: pinctrl@700 {
-
318 compatible = "xlnx,pinctrl-zynq";
-
319 reg = <0x700 0x200>;
-
320 syscon = <&slcr>;
-
321 };
-
322 };
-
323
-
324 dmac_s: dmac@f8003000 {
-
325 compatible = "arm,pl330", "arm,primecell";
-
326 reg = <0xf8003000 0x1000>;
-
327 interrupt-parent = <&intc>;
-
328 interrupt-names = "abort", "dma0", "dma1", "dma2", "dma3",
-
329 "dma4", "dma5", "dma6", "dma7";
-
330 interrupts = <0 13 4>,
-
331 <0 14 4>, <0 15 4>,
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332 <0 16 4>, <0 17 4>,
-
333 <0 40 4>, <0 41 4>,
-
334 <0 42 4>, <0 43 4>;
-
335 #dma-cells = <1>;
-
336 #dma-channels = <8>;
-
337 #dma-requests = <4>;
-
338 clocks = <&clkc 27>;
-
339 clock-names = "apb_pclk";
-
340 };
-
341
-
342 devcfg: devcfg@f8007000 {
-
343 compatible = "xlnx,zynq-devcfg-1.0";
-
344 interrupt-parent = <&intc>;
-
345 interrupts = <0 8 4>;
-
346 reg = <0xf8007000 0x100>;
-
347 clocks = <&clkc 12>, <&clkc 15>, <&clkc 16>, <&clkc 17>, <&clkc 18>;
-
348 clock-names = "ref_clk", "fclk0", "fclk1", "fclk2", "fclk3";
-
349 syscon = <&slcr>;
-
350 };
-
351
-
352 global_timer: timer@f8f00200 {
-
353 compatible = "arm,cortex-a9-global-timer";
-
354 reg = <0xf8f00200 0x20>;
-
355 interrupts = <1 11 0x301>;
-
356 interrupt-parent = <&intc>;
-
357 clocks = <&clkc 4>;
-
358 };
-
359
-
360 ttc0: timer@f8001000 {
-
361 interrupt-parent = <&intc>;
-
362 interrupts = <0 10 4>, <0 11 4>, <0 12 4>;
-
363 compatible = "cdns,ttc";
-
364 clocks = <&clkc 6>;
-
365 reg = <0xF8001000 0x1000>;
-
366 };
-
367
-
368 ttc1: timer@f8002000 {
-
369 interrupt-parent = <&intc>;
-
370 interrupts = <0 37 4>, <0 38 4>, <0 39 4>;
-
371 compatible = "cdns,ttc";
-
372 clocks = <&clkc 6>;
-
373 reg = <0xF8002000 0x1000>;
-
374 };
-
375
-
376 scutimer: timer@f8f00600 {
-
377 interrupt-parent = <&intc>;
-
378 interrupts = <1 13 0x301>;
-
379 compatible = "arm,cortex-a9-twd-timer";
-
380 reg = <0xf8f00600 0x20>;
-
381 clocks = <&clkc 4>;
-
382 };
-
383
-
384 usb0: usb@e0002000 {
-
385 compatible = "xlnx,zynq-usb-2.20a", "chipidea,usb2";
-
386 status = "disabled";
-
387 clocks = <&clkc 28>;
-
388 interrupt-parent = <&intc>;
-
389 interrupts = <0 21 4>;
-
390 reg = <0xe0002000 0x1000>;
-
391 phy_type = "ulpi";
-
392 };
-
393
-
394 usb1: usb@e0003000 {
-
395 compatible = "xlnx,zynq-usb-2.20a", "chipidea,usb2";
-
396 status = "disabled";
-
397 clocks = <&clkc 29>;
-
398 interrupt-parent = <&intc>;
-
399 interrupts = <0 44 4>;
-
400 reg = <0xe0003000 0x1000>;
-
401 phy_type = "ulpi";
-
402 };
-
403
-
404 watchdog0: watchdog@f8005000 {
-
405 clocks = <&clkc 45>;
-
406 compatible = "cdns,wdt-r1p2";
-
407 interrupt-parent = <&intc>;
-
408 interrupts = <0 9 1>;
-
409 reg = <0xf8005000 0x1000>;
-
410 timeout-sec = <10>;
-
411 };
-
412 };
- 413 };
接下来是对上面定义的节点一些属性的补充。
[plain] view plain copy 在CODE上查看代码片派生到我的代码片
《zynq.dtsi》
-
1
-
2 /include/ "zynq-7000.dtsi"
-
3
-
4 /*
-
5 * The Xilinx EMACPS and the Cadance GEM drivers are for the same IP core, but
-
6 * the drivers are not fully feature compatible. We stay with the Xilinx driver
-
7 * for now. The main issue is the lack of support for gmii2rgmii when using the
-
8 * Cadance driver.
-
9 */
-
10 &amba {
-
11 eth: eth@e000b000 {
-
12 compatible = "xlnx,ps7-ethernet-1.00.a";
-
13 reg = <0xe000b000 0x1000>;
-
14 interrupts = <0 22 4>;
-
15 interrupt-parent = <&intc>;
-
16 #address-cells = <0x1>;
-
17 #size-cells = <0x0>;
-
18
-
19 clock-names = "ref_clk", "aper_clk";
-
20 clocks = <&clkc 13>, <&clkc 30>;
-
21
-
22 xlnx,enet-clk-freq-hz = <0x17d7840>;
-
23 xlnx,enet-reset = "MIO 11";
-
24 xlnx,enet-slcr-1000mbps-div0 = <0x8>;
-
25 xlnx,enet-slcr-1000mbps-div1 = <0x1>;
-
26 xlnx,enet-slcr-100mbps-div0 = <0x8>;
-
27 xlnx,enet-slcr-100mbps-div1 = <0x5>;
-
28 xlnx,enet-slcr-10mbps-div0 = <0x8>;
-
29 xlnx,enet-slcr-10mbps-div1 = <0x32>;
-
30 xlnx,eth-mode = <0x1>;
-
31 xlnx,has-mdio = <0x1>;
-
32 xlnx,ptp-enet-clock = <111111115>;
-
33 };
-
34
-
35 };
-
36
-
37 /delete-node/ &gem0;
-
38 /delete-node/ &gem1;
-
39
-
40 / {
-
41 interrupt-parent = <&intc>;
-
42
-
43 aliases: aliases {
-
44 ethernet0 = ð
-
45 serial0 = &uart1;
-
46 };
-
47 };
-
48
-
49 &usb0 {
-
50 status = "okay";
-
51 dr_mode = "host"; /* This breaks OTG mode */
-
52 };
-
53
-
54 &uart1 {
-
55 status = "okay";
-
56 };
-
57
-
58 &sdhci0 {
-
59 status = "okay";
- 60 };
接下来是板级节点属性的定义, memory的reg属性表示内存的起始地址是0,大小是0x2000_0000(512M),这正是板子内存大小。
[plain] view plain copy 在CODE上查看代码片派生到我的代码片
《zynq-zed.dtsi》
-
1 /include/ "zynq.dtsi"
-
2
-
3 / {
-
4 model = "Xilinx Zynq ZED";
-
5 memory {
-
6 device_type = "memory";
-
7 reg = <0x000000000 0x20000000>;
-
8 };
-
9
-
10 chosen {
-
11 // bootargs = "console=ttyPS0,115200 root=/dev/ram rw initrd=0x1100000,33M ip=:::::eth0:dhcp earlyprintk";
-
12 bootargs = "console=ttyPS0,115200 root=/dev/mmcblk0p2 rw earlyprintk rootfstype=ext4 rootwait";
-
13 linux,stdout-path = "/amba@0/uart@E0001000";
-
14 };
-
15 };
-
16
-
17 ð {
-
18 phy-handle = <&phy0>;
-
19 phy-mode = "rgmii-id";
-
20
-
21 phy0: phy@0 {
-
22 compatible = "marvell,88e1510";
-
23 device_type = "ethernet-phy";
-
24 reg = <0x0>;
-
25 marvell,reg-init=<3 16 0xff00 0x1e 3 17 0xfff0 0x0a>;
-
26 };
-
27 };
-
28
-
29 &usb0 {
-
30 xlnx,phy-reset-gpio = <&gpio0 85 0>;
-
31 };
-
32
-
33 &qspi {
-
34 status = "okay";
-
35 is-dual = <0>;
-
36 num-cs = <1>;
-
37 primary_flash: ps7-qspi@0 {
-
38 #address-cells = <1>;
-
39 #size-cells = <1>;
-
40 compatible = "n25q128a11";
-
41 reg = <0x0>;
-
42 spi-max-frequency = <50000000>;
-
43 partition@0x00000000 {
-
44 label = "boot";
-
45 reg = <0x00000000 0x00500000>;
-
46 };
-
47 partition@0x00500000 {
-
48 label = "bootenv";
-
49 reg = <0x00500000 0x00020000>;
-
50 };
-
51 partition@0x00520000 {
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52 label = "config";
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53 reg = <0x00520000 0x00020000>;
-
54 };
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55 partition@0x00540000 {
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56 label = "image";
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57 reg = <0x00540000 0x00a80000>;
-
58 };
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59 partition@0x00fc0000 {
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60 label = "spare";
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61 reg = <0x00fc0000 0x00000000>;
-
62 };
-
63 };
- 64 };
在下来,就是这里使用了hdmi视频和zed board上的音频以及其它外设资源定义了,这些外设使用了PL(program logic资源,即FPGA资源)。
[plain] view plain copy 在CODE上查看代码片派生到我的代码片
《zynq-zed-adv7511.dtsi》
-
1 / {
-
2 fpga_axi: fpga-axi@0 {
-
3 compatible = "simple-bus";
-
4 #address-cells = <0x1>;
-
5 #size-cells = <0x1>;
-
6 ranges;
-
7
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8 i2c@41600000 {
-
9 compatible = "xlnx,axi-iic-1.01.b", "xlnx,xps-iic-2.00.a";
-
10 interrupt-parent = <&intc>;
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11 interrupts = <0 58 0x4>;
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12 reg = <0x41600000 0x10000>;
-
13
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14 #size-cells = <0>;
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15 #address-cells = <1>;
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16
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17 adv7511: adv7511@39 {
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18 compatible = "adi,adv7511";
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19 reg = <0x39>;
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20
-
21 adi,input-style = <0x02>;
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22 adi,input-id = <0x01>;
-
23 adi,input-color-depth = <0x3>;
-
24 adi,sync-pulse = <0x03>;
-
25 adi,bit-justification = <0x01>;
-
26 adi,up-conversion = <0x00>;
-
27 adi,timing-generation-sequence = <0x00>;
-
28 adi,vsync-polarity = <0x02>;
-
29 adi,hsync-polarity = <0x02>;
-
30 adi,tdms-clock-inversion;
-
31 adi,clock-delay = <0x03>;
-
32
-
33 ports {
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34 #address-cells = <1>;
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35 #size-cells = <0>;
-
36
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37 port@0 {
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38 reg = <0>;
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39 adv7511_in: endpoint {
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40 remote-endpoint = <&axi_hdmi_out>;
-
41 };
-
42 };
-
43
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44 port@1 {
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45 reg = <1>;
-
46 };
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47 };
-
48 };
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49
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50 adau1761: adau1761@3b {
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51 compatible = "adi,adau1761";
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52 reg = <0x3b>;
-
53 };
-
54 };
-
55
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56 axi_vdma_0: axivdma@43000000 {
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57 compatible = "xlnx,axi-vdma-1.00.a";
-
58 #address-cells = <1>;
-
59 #size-cells = <1>;
-
60 #dma-cells = <1>;
-
61 #dma-channels = <1>;
-
62 reg = <0x43000000 0x1000>;
-
63 xlnx,num-fstores = <0x3>;
-
64 dma-channel@43000000 {
-
65 compatible = "xlnx,axi-vdma-mm2s-channel";
-
66 interrupts = <0 59 0x4>;
-
67 xlnx,datawidth = <0x40>;
-
68 xlnx,genlock-mode = <0x0>;
-
69 xlnx,include-dre = <0x0>;
-
70 };
-
71 };
-
72
-
73 hdmi_clock: axi-clkgen@79000000 {
-
74 compatible = "adi,axi-clkgen-2.00.a";
-
75 reg = <0x79000000 0x10000>;
-
76 #clock-cells = <0>;
-
77 clocks = <&clkc 16>;
-
78 };
-
79
-
80 axi_hdmi@70e00000 {
-
81 compatible = "adi,axi-hdmi-tx-1.00.a";
-
82 reg = <0x70e00000 0x10000>;
-
83 dmas = <&axi_vdma_0 0>;
-
84 dma-names = "video";
-
85 clocks = <&hdmi_clock>;
-
86
-
87 port {
-
88 axi_hdmi_out: endpoint {
-
89 remote-endpoint = <&adv7511_in>;
-
90 };
-
91 };
-
92 };
-
93
-
94 audio_clock: audio_clock {
-
95 compatible = "fixed-clock";
-
96 #clock-cells = <0>;
-
97 clock-frequency = <12288000>;
-
98 };
-
99
-
100 axi_spdif_tx_0: axi-spdif-tx@0x75c00000 {
-
101 compatible = "adi,axi-spdif-tx-1.00.a";
-
102 reg = <0x75c00000 0x1000>;
-
103 dmas = <&dmac_s 0>;
-
104 dma-names = "tx";
-
105 clocks = <&clkc 15>, <&audio_clock>;
-
106 clock-names = "axi", "ref";
-
107 };
-
108
-
109 adv7511_hdmi_snd: adv7511_hdmi_snd {
-
110 compatible = "adv7511-hdmi-snd";
-
111 audio-codec = <&adv7511>;
-
112 cpu-dai = <&axi_spdif_tx_0>;
-
113 };
-
114
-
115 axi_i2s_0: axi-i2s@0x77600000 {
-
116 compatible = "adi,axi-i2s-1.00.a";
-
117 reg = <0x77600000 0x1000>;
-
118 dmas = <&dmac_s 1 &dmac_s 2>;
-
119 dma-names = "tx", "rx";
-
120 clocks = <&clkc 15>, <&audio_clock>;
-
121 clock-names = "axi", "ref";
- 122 };
/* 第116行的字段和<sound/soc/adi/axi-i2s.c>的260行相互匹配,reg这个字段在vivado的block design中Address Editor可以看出0x77600000是i2s是基地址,
0x1000是寄存器段的大小,dmas是dma字段,使用了PS端的dmac 1和dmac 2,dmac 0在vivado的设计中并没有设备,所以spdif的驱动并没有注册,这两个dma分别用于发送和
接收,clocks字段第一个是axi接口的时钟,第二个是iis的master时钟,这里就是12.288MHz。 这个IIS 控制器dai,实际上在PL里,但是相对adau1761这些外置dai而言,它们是cpu dai*/
-
123
-
124 zed_sound: zed_sound {
-
125 compatible = "digilent,zed-sound";
-
126 audio-codec = <&adau1761>;
-
127 cpu-dai = <&axi_i2s_0>;
- 128 };
/*这个字段的125行是和<sound/soc/adi/zed_adau1761.c> 的144相呼应的,设备树表示,adau1761将和axi_i2s_0进行音频数据交互,该文件描述了codec侧的dai*/
-
129 };
-
130
-
131 leds {
-
132 compatible = "gpio-leds";
-
133 ld0 {
-
134 label = "ld0:red";
-
135 gpios = <&gpio0 73 0>;
-
136 };
-
137
-
138 ld1 {
-
139 label = "ld1:red";
-
140 gpios = <&gpio0 74 0>;
-
141 };
-
142
-
143 ld2 {
-
144 label = "ld2:red";
-
145 gpios = <&gpio0 75 0>;
-
146 };
-
147
-
148 ld3 {
-
149 label = "ld3:red";
-
150 gpios = <&gpio0 76 0>;
-
151 };
-
152
-
153 ld4 {
-
154 label = "ld4:red";
-
155 gpios = <&gpio0 77 0>;
-
156 };
-
157
-
158 ld5 {
-
159 label = "ld5:red";
-
160 gpios = <&gpio0 78 0>;
-
161 };
-
162
-
163 ld6 {
-
164 label = "ld6:red";
-
165 gpios = <&gpio0 79 0>;
-
166 };
-
167
-
168 ld7 {
-
169 label = "ld7:red";
-
170 gpios = <&gpio0 80 0>;
-
171 };
-
172 };
-
173 };
-
interrupt节点:
interrupt-parent = <&intc1>;"interrupts" property, an "interrupts-extended" property, or both. If both are
present, the latter should take precedence; //可继承
interrupt-cells = <2>;//中断方式
- bits[3:0] trigger type and level flags
1 = low-to-high edge triggered
2 = high-to-low edge triggered
4 = active high level-sensitive
8 = active low level-sensitive
interrupts = <0 30 4>;
The interrupt is chained to hardware interrupt 61 (29 + 32) of the GIC
for Zynq.
中断号:30+32