Zynq-Linux移植学习笔记之47-PL部分spi flash文件系统挂载

1、背景介绍

ZYNQ在PL部分使用AXI_QUAD_SPI IP核外挂了8片SPI FLASH，VIVADO示例图如下：

上图中有颜色的线条为IP核的中断到ZYNQ PL-PS中断，由于设备太多，这里使用了中断级联。IP核的地址分配如下：

2、内核配置

内核中需要修改下面文件

增加兼容的硬件spi型号，这里使用的n25q256

完整代码如下：

/** MTD SPI driver for ST M25Pxx (and similar) serial flash chips** Author: Mike Lavender, mike@steroidmicros.com** Copyright (c) 2005, Intec Automation Inc.** Some parts are based on lart.c by Abraham Van Der Merwe** Cleaned up and generalized based on mtd_dataflash.c** This code is free software; you can redistribute it and/or modify* it under the terms of the GNU General Public License version 2 as* published by the Free Software Foundation.**/#include <linux/err.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/device.h>#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
#include <linux/mtd/spi-nor.h>
#include <linux/of.h>static ssize_t m25p80_write(struct spi_nor *nor, loff_t to, size_t len,const u_char *buf);
static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,u_char *buf);#define    MAX_CMD_SIZE        6
struct m25p {struct spi_device  *spi;struct spi_nor     spi_nor;u8          command[MAX_CMD_SIZE];
};static int m25p80_read_reg(struct spi_nor *nor, u8 code, u8 *val, int len)
{
//printk("##################m25p80 read reg\n");struct m25p *flash = nor->priv;struct spi_device *spi = flash->spi;int ret;//printk("code is 0x%x,len:%d,---%x----\n",code,len,*val);ret = spi_write_then_read(spi, &code, 1, val, len);if (ret < 0)dev_err(&spi->dev, "error %d reading %x\n", ret, code);return ret;
}static void m25p_addr2cmd(struct spi_nor *nor, unsigned int addr, u8 *cmd)
{/* opcode is in cmd[0] */cmd[1] = addr >> (nor->addr_width * 8 -  8);cmd[2] = addr >> (nor->addr_width * 8 - 16);cmd[3] = addr >> (nor->addr_width * 8 - 24);cmd[4] = addr >> (nor->addr_width * 8 - 32);
}static int m25p_cmdsz(struct spi_nor *nor)
{return 1 + nor->addr_width;
}static int m25p80_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
{struct m25p *flash = nor->priv;struct spi_device *spi = flash->spi;flash->command[0] = opcode;if (buf)memcpy(&flash->command[1], buf, len);return spi_write(spi, flash->command, len + 1);
}static ssize_t m25p80_write(struct spi_nor *nor, loff_t to, size_t len,const u_char *buf)
{struct m25p *flash = nor->priv;struct spi_device *spi = flash->spi;struct spi_transfer t[2] = {};struct spi_message m;int cmd_sz = m25p_cmdsz(nor);ssize_t ret;
//printk("m25p80_write write len :%d,%x\n",len,*buf);spi_message_init(&m);if (nor->program_opcode == SPINOR_OP_AAI_WP && nor->sst_write_second)cmd_sz = 1;flash->command[0] = nor->program_opcode;m25p_addr2cmd(nor, to, flash->command);t[0].tx_buf = flash->command;t[0].len = cmd_sz;spi_message_add_tail(&t[0], &m);t[1].tx_buf = buf;t[1].len = len;spi_message_add_tail(&t[1], &m);ret = spi_sync(spi, &m);if (ret)return ret;ret = m.actual_length - cmd_sz;if (ret < 0)return -EIO;return ret;
}static inline unsigned int m25p80_rx_nbits(struct spi_nor *nor)
{switch (nor->flash_read) {case SPI_NOR_DUAL:return 2;case SPI_NOR_QUAD:return 4;default:return 0;}
}/** Read an address range from the nor chip.  The address range* may be any size provided it is within the physical boundaries.*/
static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,u_char *buf)
{struct m25p *flash = nor->priv;struct spi_device *spi = flash->spi;struct spi_transfer t[2];struct spi_message m;unsigned int dummy = nor->read_dummy;ssize_t ret;
//printk("m25p80_read read len :%d,%x\n",len,*buf);/* convert the dummy cycles to the number of bytes */dummy /= 8;if (spi_flash_read_supported(spi)) {struct spi_flash_read_message msg;memset(&msg, 0, sizeof(msg));msg.buf = buf;msg.from = from;msg.len = len;msg.read_opcode = nor->read_opcode;msg.addr_width = nor->addr_width;msg.dummy_bytes = dummy;/* TODO: Support other combinations */msg.opcode_nbits = SPI_NBITS_SINGLE;msg.addr_nbits = SPI_NBITS_SINGLE;msg.data_nbits = m25p80_rx_nbits(nor);ret = spi_flash_read(spi, &msg);if (ret < 0)return ret;return msg.retlen;}spi_message_init(&m);memset(t, 0, (sizeof t));flash->command[0] = nor->read_opcode;m25p_addr2cmd(nor, from, flash->command);t[0].tx_buf = flash->command;t[0].len = m25p_cmdsz(nor) + dummy;t[0].dummy = nor->read_dummy;spi_message_add_tail(&t[0], &m);t[1].rx_buf = buf;t[1].rx_nbits = m25p80_rx_nbits(nor);t[1].len = min(len, spi_max_transfer_size(spi));spi_message_add_tail(&t[1], &m);ret = spi_sync(spi, &m);if (ret)return ret;ret = m.actual_length - m25p_cmdsz(nor) - dummy;if (ret < 0)return -EIO;return ret;
}/** board specific setup should have ensured the SPI clock used here* matches what the READ command supports, at least until this driver* understands FAST_READ (for clocks over 25 MHz).*/
static int m25p_probe(struct spi_device *spi)
{struct flash_platform_data *data;struct m25p *flash;struct spi_nor *nor;struct mtd_info *mtd = NULL;enum read_mode mode = SPI_NOR_NORMAL;char *flash_name;int ret;unsigned int chip_num = 0;
//  printk("enter probe ...\n");data = dev_get_platdata(&spi->dev);flash = devm_kzalloc(&spi->dev, sizeof(*flash), GFP_KERNEL);if (!flash)return -ENOMEM;nor = &flash->spi_nor;mtd = &nor->mtd;/* install the hooks */nor->read = m25p80_read;nor->write = m25p80_write;nor->write_reg = m25p80_write_reg;nor->read_reg = m25p80_read_reg;nor->dev = &spi->dev;spi_nor_set_flash_node(nor, spi->dev.of_node);nor->priv = flash;spi_set_drvdata(spi, flash);flash->spi = spi;nor->spi = spi;if (spi->mode & SPI_RX_QUAD)mode = SPI_NOR_QUAD;else if (spi->mode & SPI_RX_DUAL)mode = SPI_NOR_DUAL;if (data && data->name)nor->mtd.name = data->name;/* For some (historical?) reason many platforms provide two different* names in flash_platform_data: "name" and "type". Quite often name is* set to "m25p80" and then "type" provides a real chip name.* If that's the case, respect "type" and ignore a "name".*/if (data && data->type)flash_name = data->type;else if (!strcmp(spi->modalias, "spi-nor"))flash_name = NULL; /* auto-detect */elseflash_name = spi->modalias;//printk("flash name is %s\n",flash_name);ret = spi_nor_scan(nor, flash_name, mode);if (ret)return ret;of_property_read_u32(spi->dev.of_node, "chip_num",&chip_num);if(chip_num>0){nor->mtd.size = nor->mtd.size*chip_num;}
//printk("mtd .name = %s, .size = 0x%llx (%lldMiB), "
//      ".erasesize = 0x%.8x (%uKiB) .numeraseregions = %d\n",
//      nor->mtd.name, (long long)nor->mtd.size, (long long)(nor->mtd.size >> 20),
//      nor->mtd.erasesize, nor->mtd.erasesize / 1024, nor->mtd.numeraseregions);return mtd_device_register(&nor->mtd, data ? data->parts : NULL,data ? data->nr_parts : 0);
}static int m25p_remove(struct spi_device *spi)
{struct m25p    *flash = spi_get_drvdata(spi);/* Clean up MTD stuff. */return mtd_device_unregister(&flash->spi_nor.mtd);
}/** Do NOT add to this array without reading the following:** Historically, many flash devices are bound to this driver by their name. But* since most of these flash are compatible to some extent, and their* differences can often be differentiated by the JEDEC read-ID command, we* encourage new users to add support to the spi-nor library, and simply bind* against a generic string here (e.g., "jedec,spi-nor").** Many flash names are kept here in this list (as well as in spi-nor.c) to* keep them available as module aliases for existing platforms.*/
static const struct spi_device_id m25p_ids[] = {/** Allow non-DT platform devices to bind to the "spi-nor" modalias, and* hack around the fact that the SPI core does not provide uevent* matching for .of_match_table*/{"spi-nor"},/** Entries not used in DTs that should be safe to drop after replacing* them with "spi-nor" in platform data.*/{"s25sl064a"}, {"w25x16"},   {"m25p10"},   {"m25px64"},/** Entries that were used in DTs without "jedec,spi-nor" fallback and* should be kept for backward compatibility.*/{"at25df321a"},   {"at25df641"},    {"at26df081a"},{"mr25h256"},{"mx25l4005a"},   {"mx25l1606e"},   {"mx25l6405d"},   {"mx25l12805d"},{"mx25l25635e"},{"mx66l51235l"},{"n25q064"},    {"n25q128a11"},   {"n25q128a13"},   {"n25q512a"},{"n25q256a"},{"s25fl256s1"}, {"s25fl512s"},    {"s25sl12801"},   {"s25fl008k"},{"s25fl064k"},{"sst25vf040b"},{"sst25vf016b"},{"sst25vf032b"},{"sst25wf040"},{"m25p40"},    {"m25p80"},   {"m25p16"},   {"m25p32"},{"m25p64"},  {"m25p128"},{"w25x80"}, {"w25x32"},   {"w25q32"},   {"w25q32dw"},{"w25q80bl"},  {"w25q128"},  {"w25q256"},/* Flashes that can't be detected using JEDEC */{"m25p05-nonjedec"},   {"m25p10-nonjedec"},  {"m25p20-nonjedec"},{"m25p40-nonjedec"},    {"m25p80-nonjedec"},  {"m25p16-nonjedec"},{"m25p32-nonjedec"},    {"m25p64-nonjedec"},  {"m25p128-nonjedec"},{ },
};
MODULE_DEVICE_TABLE(spi, m25p_ids);static const struct of_device_id m25p_of_table[] = {/** Generic compatibility for SPI NOR that can be identified by the* JEDEC READ ID opcode (0x9F). Use this, if possible.*/{ .compatible = "jedec,spi-nor" },{ .compatible = "n25q256,spi-nor" },{}
};
MODULE_DEVICE_TABLE(of, m25p_of_table);static struct spi_driver m25p80_driver = {.driver = {.name = "n25q256a",.of_match_table = m25p_of_table,},.id_table    = m25p_ids,.probe  = m25p_probe,.remove   = m25p_remove,/* REVISIT: many of these chips have deep power-down modes, which* should clearly be entered on suspend() to minimize power use.* And also when they're otherwise idle...*/
};module_spi_driver(m25p80_driver);MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mike Lavender");
MODULE_DESCRIPTION("MTD SPI driver for ST M25Pxx flash chips");

3、devicetree配置

设备树可以用sdk产生，但是生成完后要修改ip核的节点说明，如下：

其中增加了中断描述信息，另外外挂的flash型号也需要描述。

完整的设备树信息如下：

/dts-v1/;/ {#address-cells = <0x1>;#size-cells = <0x1>;compatible = "xlnx,zynq-7000";cpus {#address-cells = <0x1>;#size-cells = <0x0>;cpu@0 {compatible = "arm,cortex-a9";device_type = "cpu";reg = <0x0>;clocks = <0x1 0x3>;clock-latency = <0x3e8>;cpu0-supply = <0x2>;operating-points = <0xa4cb8 0xf4240 0x5265c 0xf4240>;};cpu@1 {compatible = "arm,cortex-a9";device_type = "cpu";reg = <0x1>;clocks = <0x1 0x3>;};};fpga-full {compatible = "fpga-region";fpga-mgr = <0x3>;#address-cells = <0x1>;#size-cells = <0x1>;ranges;};pmu@f8891000 {compatible = "arm,cortex-a9-pmu";interrupts = <0x0 0x5 0x4 0x0 0x6 0x4>;interrupt-parent = <0x4>;reg = <0xf8891000 0x1000 0xf8893000 0x1000>;};fixedregulator {compatible = "regulator-fixed";regulator-name = "VCCPINT";regulator-min-microvolt = <0xf4240>;regulator-max-microvolt = <0xf4240>;regulator-boot-on;regulator-always-on;linux,phandle = <0x2>;phandle = <0x2>;};amba {u-boot,dm-pre-reloc;compatible = "simple-bus";#address-cells = <0x1>;#size-cells = <0x1>;interrupt-parent = <0x4>;ranges;adc@f8007100 {compatible = "xlnx,zynq-xadc-1.00.a";reg = <0xf8007100 0x20>;interrupts = <0x0 0x7 0x4>;interrupt-parent = <0x4>;clocks = <0x1 0xc>;xlnx,channels {#address-cells = <0x1>;#size-cells = <0x0>;channel@0 {reg = <0x0>;};channel@1 {reg = <0x1>;};channel@2 {reg = <0x2>;};channel@3 {reg = <0x3>;};channel@4 {reg = <0x4>;};channel@5 {reg = <0x5>;};channel@6 {reg = <0x6>;};channel@7 {reg = <0x7>;};channel@8 {reg = <0x8>;};channel@9 {reg = <0x9>;};channel@a {reg = <0xa>;};channel@b {reg = <0xb>;};channel@c {reg = <0xc>;};channel@d {reg = <0xd>;};channel@e {reg = <0xe>;};channel@f {reg = <0xf>;};channel@10 {reg = <0x10>;};};};gpio@e000a000 {compatible = "xlnx,zynq-gpio-1.0";#gpio-cells = <0x2>;clocks = <0x1 0x2a>;gpio-controller;interrupt-controller;#interrupt-cells = <0x2>;interrupt-parent = <0x4>;interrupts = <0x0 0x14 0x4>;reg = <0xe000a000 0x1000>;};i2c@e0004000 {compatible = "cdns,i2c-r1p10-slave";status = "okay";clocks = <0x1 0x26>;interrupt-parent = <0x4>;interrupts = <0x0 0x19 0x4>;reg = <0xe0004000 0x1000>;#address-cells = <0x1>;#size-cells = <0x0>;clock-frequency = <0x61a80>;};i2c@e0005000 {compatible = "cdns,i2c-r1p10-slave";status = "okay";clocks = <0x1 0x27>;interrupt-parent = <0x4>;interrupts = <0x0 0x30 0x4>;reg = <0xe0005000 0x1000>;#address-cells = <0x1>;#size-cells = <0x0>;clock-frequency = <0x61a80>;};interrupt-controller@f8f01000 {compatible = "arm,cortex-a9-gic";#interrupt-cells = <0x3>;interrupt-controller;reg = <0xf8f01000 0x1000 0xf8f00100 0x100>;num_cpus = <0x2>;num_interrupts = <0x60>;linux,phandle = <0x4>;phandle = <0x4>;};cache-controller@f8f02000 {compatible = "arm,pl310-cache";reg = <0xf8f02000 0x1000>;interrupts = <0x0 0x2 0x4>;arm,data-latency = <0x3 0x2 0x2>;arm,tag-latency = <0x2 0x2 0x2>;cache-unified;cache-level = <0x2>;};memory-controller@f8006000 {compatible = "xlnx,zynq-ddrc-a05";reg = <0xf8006000 0x1000>;};ocmc@f800c000 {compatible = "xlnx,zynq-ocmc-1.0";interrupt-parent = <0x4>;interrupts = <0x0 0x3 0x4>;reg = <0xf800c000 0x1000>;};serial@e0000000 {compatible = "xlnx,xuartps", "cdns,uart-r1p8";status = "okay";clocks = <0x1 0x17 0x1 0x28>;clock-names = "uart_clk", "pclk";reg = <0xe0000000 0x1000>;interrupts = <0x0 0x1b 0x4>;device_type = "serial";port-number = <0x4>;};spi@e000d000 {clock-names = "ref_clk", "pclk";clocks = <0x1 0xa 0x1 0x2b>;compatible = "xlnx,zynq-qspi-1.0";status = "okay";interrupt-parent = <0x4>;interrupts = <0x0 0x13 0x4>;reg = <0xe000d000 0x1000>;#address-cells = <0x1>;#size-cells = <0x0>;is-dual = <0x1>;num-cs = <0x1>;};ethernet@e000b000 {compatible = "xlnx,ps7-ethernet-1.00.a";reg = <0xe000b000 0x1000>;status = "okay";interrupts = <0x0 0x16 0x4>;clocks = <0x1 0xd 0x1 0x1e>;clock-names = "ref_clk", "aper_clk";#address-cells = <0x1>;#size-cells = <0x0>;enet-reset = <0x4 0x2f 0x0>;#local-mac-address = [00 0b 35 11 12 00];local-mac-address = [00 0b 44 00 3e 16];phy-mode = "rgmii";phy-handle = <0x7>;xlnx,eth-mode = <0x1>;xlnx,has-mdio = <0x1>;xlnx,ptp-enet-clock = <0x69f6bcb>;mdio {#address-cells = <0x1>;#size-cells = <0x0>;phy@2 {compatible = "marvell,88e1111";device_type = "ethernet-phy";reg = <0x2>;linux,phandle = <0x7>;phandle = <0x7>;};};};ethernet@e000c000 {compatible = "xlnx,ps7-ethernet-1.00.b";reg = <0xe000c000 0x1000>;status = "okay";interrupts = <0x0 0x2d 0x4>;clocks = <0x1 0xe 0x1 0x1f>;clock-names = "ref_clk", "aper_clk";#address-cells = <0x1>;#size-cells = <0x0>;enet-reset = <0x4 0x2f 0x0>;local-mac-address = [00 0b 36 11 11 00];phy-mode = "rgmii";phy-handle = <0x8>;xlnx,eth-mode = <0x1>;xlnx,has-mdio = <0x1>;xlnx,ptp-enet-clock = <0x69f6bcb>;mdio {#address-cells = <0x1>;#size-cells = <0x0>;phy@1 {compatible = "marvell,88e1111";device_type = "ethernet-phy";reg = <0x1>;linux,phandle = <0x8>;phandle = <0x8>;};};};slcr@f8000000 {#address-cells = <0x1>;#size-cells = <0x1>;compatible = "xlnx,zynq-slcr", "syscon", "simple-mfd";reg = <0xf8000000 0x1000>;ranges;linux,phandle = <0x5>;phandle = <0x5>;clkc@100 {#clock-cells = <0x1>;compatible = "xlnx,ps7-clkc";fclk-enable = <0x3>;clock-output-names = "armpll", "ddrpll", "iopll", "cpu_6or4x", "cpu_3or2x", "cpu_2x", "cpu_1x", "ddr2x", "ddr3x", "dci", "lqspi", "smc", "pcap", "gem0", "gem1", "fclk0", "fclk1", "fclk2", "fclk3", "can0", "can1", "sdio0", "sdio1", "uart0", "uart1", "spi0", "spi1", "dma", "usb0_aper", "usb1_aper", "gem0_aper", "gem1_aper", "sdio0_aper", "sdio1_aper", "spi0_aper", "spi1_aper", "can0_aper", "can1_aper", "i2c0_aper", "i2c1_aper", "uart0_aper", "uart1_aper", "gpio_aper", "lqspi_aper", "smc_aper", "swdt", "dbg_trc", "dbg_apb";reg = <0x100 0x100>;ps-clk-frequency = <0x2faf080>;linux,phandle = <0x1>;phandle = <0x1>;};rstc@200 {compatible = "xlnx,zynq-reset";reg = <0x200 0x48>;#reset-cells = <0x1>;syscon = <0x5>;};pinctrl@700 {compatible = "xlnx,pinctrl-zynq";reg = <0x700 0x200>;syscon = <0x5>;};};dmac@f8003000 {compatible = "arm,pl330", "arm,primecell";reg = <0xf8003000 0x1000>;interrupt-parent = <0x4>;interrupt-names = "abort", "dma0", "dma1", "dma2", "dma3", "dma4", "dma5", "dma6", "dma7";interrupts = <0x0 0xd 0x4 0x0 0xe 0x4 0x0 0xf 0x4 0x0 0x10 0x4 0x0 0x11 0x4 0x0 0x28 0x4 0x0 0x29 0x4 0x0 0x2a 0x4 0x0 0x2b 0x4>;#dma-cells = <0x1>;#dma-channels = <0x8>;#dma-requests = <0x4>;clocks = <0x1 0x1b>;clock-names = "apb_pclk";};devcfg@f8007000 {compatible = "xlnx,zynq-devcfg-1.0";interrupt-parent = <0x4>;interrupts = <0x0 0x8 0x4>;reg = <0xf8007000 0x100>;clocks = <0x1 0xc 0x1 0xf 0x1 0x10 0x1 0x11 0x1 0x12>;clock-names = "ref_clk", "fclk0", "fclk1", "fclk2", "fclk3";syscon = <0x5>;linux,phandle = <0x3>;phandle = <0x3>;};efuse@f800d000 {compatible = "xlnx,zynq-efuse";reg = <0xf800d000 0x20>;};timer@f8f00200 {compatible = "arm,cortex-a9-global-timer";reg = <0xf8f00200 0x20>;interrupts = <0x1 0xb 0x301>;interrupt-parent = <0x4>;clocks = <0x1 0x4>;};timer@f8001000 {interrupt-parent = <0x4>;interrupts = <0x0 0xa 0x4 0x0 0xb 0x4 0x0 0xc 0x4>;compatible = "cdns,ttc";clocks = <0x1 0x6>;reg = <0xf8001000 0x1000>;};timer@f8002000 {interrupt-parent = <0x4>;interrupts = <0x0 0x25 0x4 0x0 0x26 0x4 0x0 0x27 0x4>;compatible = "cdns,ttc";clocks = <0x1 0x6>;reg = <0xf8002000 0x1000>;};timer@f8f00600 {interrupt-parent = <0x4>;interrupts = <0x1 0xd 0x301>;compatible = "arm,cortex-a9-twd-timer";reg = <0xf8f00600 0x20>;clocks = <0x1 0x4>;};watchdog@f8005000 {clocks = <0x1 0x2d>;compatible = "cdns,wdt-r1p2";interrupt-parent = <0x4>;interrupts = <0x0 0x9 0x1>;reg = <0xf8005000 0x1000>;timeout-sec = <0xa>;};};amba_pl {#address-cells = <0x1>;#size-cells = <0x1>;compatible = "simple-bus";ranges;i2c@41600000 {#address-cells = <0x1>;#size-cells = <0x0>;clock-names = "ref_clk";clocks = <0x1 0xf>;compatible = "xlnx,xps-iic-2.00.a";interrupt-names = "iic2intc_irpt";interrupt-parent = <0x4>;interrupts = <0x0 0x1f 0x4>;reg = <0x41600000 0x10000>;};i2c@41610000 {#address-cells = <0x1>;#size-cells = <0x0>;clock-names = "ref_clk";clocks = <0x1 0xf>;compatible = "xlnx,xps-iic-2.00.a";interrupt-names = "iic2intc_irpt";interrupt-parent = <0x4>;interrupts = <0x0 0x20 0x4>;reg = <0x41610000 0x10000>;i2ctemperature@2 {compatible = "temperature";reg = <0x2>;};};i2c@41620000 {#address-cells = <0x1>;#size-cells = <0x0>;clock-names = "ref_clk";clocks = <0x1 0xf>;compatible = "xlnx,xps-iic-2.00.a";interrupt-names = "iic2intc_irpt";interrupt-parent = <0x4>;interrupts = <0x0 0x34 0x4>;reg = <0x41620000 0x10000>;i2ctemperature@2 {compatible = "temperature";reg = <0x2>;};};i2c@41630000 {#address-cells = <0x1>;#size-cells = <0x0>;clock-names = "ref_clk";clocks = <0x1 0xf>;compatible = "xlnx,xps-iic-2.00.a";interrupt-names = "iic2intc_irpt";interrupt-parent = <0x4>;interrupts = <0x0 0x35 0x4>;reg = <0x41630000 0x10000>;i2ctemperature@2 {compatible = "temperature";reg = <0x2>;};};i2c@41640000 {#address-cells = <0x1>;#size-cells = <0x0>;clock-names = "ref_clk";clocks = <0x1 0xf>;compatible = "xlnx,xps-iic-2.00.a";interrupt-names = "iic2intc_irpt";interrupt-parent = <0x4>;interrupts = <0x0 0x36 0x4>;reg = <0x41640000 0x10000>;i2ctemperature@2 {compatible = "temperature";reg = <0x2>;};};i2c@41650000 {#address-cells = <0x1>;#size-cells = <0x0>;clock-names = "ref_clk";clocks = <0x1 0xf>;compatible = "xlnx,xps-iic-2.00.a";interrupt-names = "iic2intc_irpt";interrupt-parent = <0x4>;interrupts = <0x0 0x1d 0x4>;reg = <0x41650000 0x10000>;i2ctemperature@2 {compatible = "temperature";reg = <0x2>;};};i2c@41660000 {#address-cells = <0x1>;#size-cells = <0x0>;clock-names = "ref_clk";clocks = <0x1 0xf>;compatible = "xlnx,xps-iic-2.00.a";interrupt-names = "iic2intc_irpt";interrupt-parent = <0x4>;interrupts = <0x0 0x1e 0x4>;reg = <0x41660000 0x10000>;i2ctemperature@2 {compatible = "temperature";reg = <0x2>;};};axi_quad_spi@90000000 {bits-per-word = <0x8>;clock-names = "ext_spi_clk", "s_axi_aclk";clocks = <0x1 0x11 0x1 0xf>;compatible = "xlnx,axi_qspi-2.00.a";fifo-size = <0x100>;interrupt-names = "ip2intc_irpt";interrupt-parent = <0x4>;interrupts = <0x0 0x37 0x1>;num-cs = <0x4>;reg = <0x90000000 0x10000>;xlnx,num-ss-bits = <0x4>;xlnx,spi-mem-addr-bits = <0x18>;xlnx,spi-memory = <0x2>;xlnx,type-of-axi4-interface = <0x0>;xlnx,use-startup = <0x1>;xlnx,spi-mode = <0x2>;#address-cells = <0x1>;#size-cells = <0x0>;is-dual = <0x0>;flash@0 {compatible = "n25q256,spi-nor";reg = <0x0>;spi-max-frequency = <0x9ef21b0>;spi-tx-bus-width = <0x1>;spi-rx-bus-width = <0x1>;#address-cells = <0x1>;#size-cells = <0x1>;partition@0x0000000 {label = "spi-flash1";reg = <0x0 0x2000000>;};};flash@1 {compatible = "n25q256,spi-nor";reg = <0x1>;spi-max-frequency = <0x9ef21b0>;spi-tx-bus-width = <0x1>;spi-rx-bus-width = <0x1>;#address-cells = <0x1>;#size-cells = <0x1>;partition@0x0000000 {label = "spi-flash2";reg = <0x0 0x2000000>;};};flash@2 {compatible = "n25q256,spi-nor";reg = <0x2>;spi-max-frequency = <0x9ef21b0>;spi-tx-bus-width = <0x1>;spi-rx-bus-width = <0x1>;#address-cells = <0x1>;#size-cells = <0x1>;partition@0x0000000 {label = "spi-flash3";reg = <0x0 0x2000000>;};};flash@3 {compatible = "n25q256,spi-nor";reg = <0x3>;spi-max-frequency = <0x9ef21b0>;spi-tx-bus-width = <0x1>;spi-rx-bus-width = <0x1>;#address-cells = <0x1>;#size-cells = <0x1>;partition@0x0000000 {label = "spi-flash4";reg = <0x0 0x2000000>;};};};axi_quad_spi@80000000 {bits-per-word = <0x8>;clock-names = "ext_spi_clk", "s_axi_aclk";clocks = <0x1 0x11 0x1 0xf>;compatible = "xlnx,axi_qspi-2.00.a";fifo-size = <0x100>;interrupt-names = "ip2intc_irpt";interrupt-parent = <0x4>;interrupts = <0x0 0x38 0x1>;num-cs = <0x4>;reg = <0x80000000 0x10000>;xlnx,num-ss-bits = <0x4>;xlnx,spi-mem-addr-bits = <0x18>;xlnx,spi-memory = <0x2>;xlnx,type-of-axi4-interface = <0x0>;xlnx,use-startup = <0x1>;xlnx,spi-mode = <0x2>;#address-cells = <0x1>;#size-cells = <0x0>;is-dual = <0x0>;flash@0 {compatible = "n25q256,spi-nor";reg = <0x0>;spi-max-frequency = <0x9ef21b0>;spi-tx-bus-width = <0x1>;spi-rx-bus-width = <0x1>;#address-cells = <0x1>;#size-cells = <0x1>;partition@0x0000000 {label = "spi-flash5";reg = <0x0 0x2000000>;};};flash@1 {compatible = "n25q256,spi-nor";reg = <0x1>;spi-max-frequency = <0x9ef21b0>;spi-tx-bus-width = <0x1>;spi-rx-bus-width = <0x1>;#address-cells = <0x1>;#size-cells = <0x1>;partition@0x0000000 {label = "spi-flash6";reg = <0x0 0x2000000>;};};flash@2 {compatible = "n25q256,spi-nor";reg = <0x2>;spi-max-frequency = <0x9ef21b0>;spi-tx-bus-width = <0x1>;spi-rx-bus-width = <0x1>;#address-cells = <0x1>;#size-cells = <0x1>;partition@0x0000000 {label = "spi-flash7";reg = <0x0 0x2000000>;};};flash@3 {compatible = "n25q256,spi-nor";reg = <0x3>;spi-max-frequency = <0x9ef21b0>;spi-tx-bus-width = <0x1>;spi-rx-bus-width = <0x1>;#address-cells = <0x1>;#size-cells = <0x1>;partition@0x0000000 {label = "spi-flash8";reg = <0x0 0x2000000>;};};};};chosen {bootargs = "earlycon vmalloc=400M";stdout-path = "serial0:115200n8";};aliases {ethernet0 = "/amba/ethernet@e000b000";ethernet1 = "/amba/ethernet@e000c000";serial0 = "/amba/serial@e0000000";spi0 = "/amba/spi@e000d000";spi1 = "/amba_pl/axi_quad_spi@90000000";spi2 = "/amba_pl/axi_quad_spi@80000000";flash0 = "/amba_pl/axi_quad_spi@90000000/flash@0";flash1 = "/amba_pl/axi_quad_spi@90000000/flash@1";flash2 = "/amba_pl/axi_quad_spi@90000000/flash@2";flash3 = "/amba_pl/axi_quad_spi@90000000/flash@3";flash4 = "/amba_pl/axi_quad_spi@80000000/flash@0";flash5 = "/amba_pl/axi_quad_spi@80000000/flash@1";flash6 = "/amba_pl/axi_quad_spi@80000000/flash@2";flash7 = "/amba_pl/axi_quad_spi@80000000/flash@3";};memory {device_type = "memory";reg = <0x0 0x40000000>;};
};

4、ramdisk配置

Ramdisk中可以在启动脚本中增加挂载文件系统的操作，注意，8个分区启动时全部加载会导致启动速度变慢，最好还是用到多少挂载多少，这里是只挂载了一个，后续的flash分区挂载可以在boot.sh应用启动脚本中让用户自己进行配置。

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