$ wget https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.5.5.tar.gz
$ tar -xf linux-5.5.5.tar.gz
$ cp 0001-port-for-easyarm-imx280a.patch ./linux-5.5.5
$ cp build.sh ./linux-5.5.5
$ cp setenv.sh ./linux-5.5.5
$ cd linux-5.5.5
$ patch -p1 < 0001-port-for-easyarm-imx280a.patch # 可以用打补丁的形式,或者直接使用我修改好的文件,如下
$ cp imx28-evk.dts /arch/arm/boot/dts/imx28-evk.dts
$ ./build.shlinux 的移植相比u-boot的来说简单多了,linux已经把kernel和dts分开了 不需要对kernel做任何改动, 只需要修改设备树文件(
/arch/arm/boot/dts/imx28-evk.dts)就可以了. 从面的patch补丁中就可以看出我只是修改imx28-evk.dts,并没有对kernel做任何改动. 后面如果对设备树进行了改动,也只需要编译设备树就可以了,不需要重新编译kernel.
--- a/arch/arm/boot/dts/imx28-evk.dts
+++ b/arch/arm/boot/dts/imx28-evk.dts
@@ -11,7 +11,7 @@
memory@40000000 {
device_type = "memory";
- reg = <0x40000000 0x08000000>;
+ reg = <0x40000000 0x04000000>;
};
@@ -107,9 +107,9 @@
ssp0: spi@80010000 {
compatible = "fsl,imx28-mmc";
pinctrl-names = "default";
- pinctrl-0 = <&mmc0_8bit_pins_a
+ pinctrl-0 = <&mmc0_4bit_pins_a
&mmc0_cd_cfg &mmc0_sck_cfg>;
- bus-width = <8>;
+ bus-width = <4>;
wp-gpios = <&gpio2 12 0>;
vmmc-supply = <®_vddio_sd0>;
status = "okay";
@@ -159,10 +159,11 @@
fsl,pull-up = <MXS_PULL_DISABLE>;
};
- led_pin_gpio3_5: led_gpio3_5@0 {
+ led_pin_gpios: led_gpios@0 {
reg = <0>;
fsl,pinmux-ids = <
- MX28_PAD_AUART1_TX__GPIO_3_5
+ MX28_PAD_SSP0_DATA7__GPIO_2_7
+ MX28_PAD_SAIF0_MCLK__GPIO_3_20
>;
fsl,drive-strength = <MXS_DRIVE_4mA>;
fsl,voltage = <MXS_VOLTAGE_HIGH>;
@@ -198,7 +199,7 @@
pinctrl-names = "default";
pinctrl-0 = <&lcdif_24bit_pins_a
&lcdif_pins_evk>;
- status = "okay";
+ status = "disabled";
port {
display_out: endpoint {
@@ -237,7 +238,7 @@
};
lradc@80050000 {
- status = "okay";
+ status = "disabled";
fsl,lradc-touchscreen-wires = <4>;
fsl,ave-ctrl = <4>;
fsl,ave-delay = <2>;
@@ -267,26 +268,26 @@
pwm: pwm@80064000 {
pinctrl-names = "default";
- pinctrl-0 = <&pwm2_pins_a>;
+ pinctrl-0 = <&pwm4_pins_a>;
status = "okay";
};
duart: serial@80074000 {
pinctrl-names = "default";
- pinctrl-0 = <&duart_pins_a>;
+ pinctrl-0 = <&duart_pins_b>;
status = "okay";
};
auart0: serial@8006a000 {
pinctrl-names = "default";
- pinctrl-0 = <&auart0_pins_a>;
+ pinctrl-0 = <&auart0_2pins_a>;
uart-has-rtscts;
status = "okay";
};
- auart3: serial@80070000 {
+ auart1: serial@8006c000 {
pinctrl-names = "default";
- pinctrl-0 = <&auart3_pins_a>;
+ pinctrl-0 = <&auart1_2pins_a>;
status = "okay";
};
@@ -303,7 +304,7 @@
ahb@80080000 {
usb0: usb@80080000 {
pinctrl-names = "default";
- pinctrl-0 = <&usb0_id_pins_a>;
+ pinctrl-0 = <&usb0_id_pins_b>;
vbus-supply = <®_usb0_vbus>;
status = "okay";
};
@@ -318,7 +319,7 @@
pinctrl-names = "default";
pinctrl-0 = <&mac0_pins_a>;
phy-supply = <®_fec_3v3>;
- phy-reset-gpios = <&gpio4 13 GPIO_ACTIVE_LOW>;
+ phy-reset-gpios = <&gpio1 26 GPIO_ACTIVE_LOW>;
phy-reset-duration = <100>;
status = "okay";
};
@@ -327,13 +328,13 @@
phy-mode = "rmii";
pinctrl-names = "default";
pinctrl-0 = <&mac1_pins_a>;
- status = "okay";
+ status = "disabled";
};
};
sound {
compatible = "fsl,imx28-evk-sgtl5000",
- "fsl,mxs-audio-sgtl5000";
+ "fsl,mxs-audio-sgtl5000";
model = "imx28-evk-sgtl5000";
saif-controllers = <&saif0 &saif1>;
audio-codec = <&sgtl5000>;
@@ -342,13 +343,19 @@
leds {
compatible = "gpio-leds";
pinctrl-names = "default";
- pinctrl-0 = <&led_pin_gpio3_5>;
+ pinctrl-0 = <&led_pin_gpios>;
- user {
- label = "Heartbeat";
- gpios = <&gpio3 5 0>;
+ run {
+ label = "led-run";
+ gpios = <&gpio2 7 0>;
linux,default-trigger = "heartbeat";
};
+
+ err {
+ label = "led-err";
+ gpios = <&gpio3 20 0>;
+ linux,default-trigger = "default-on";
+ };
};
backlight_display: backlight {烧写镜像到sd卡并启动
.\cfimager.exe -a -f .\u-boot.sb -e rootfs.full.img -d h
copy zImage h: /y
copy imx28-evk.dtb h: /y#!/bin/sh
echo "Please input sdcard device name, (e.g. <sdc>)"
read sdcard
if [[ -z "$sdcard" ]]; then
echo "Invalid device name!"
exit 1
fi
fdisk /dev/${sdcard} < fdisk.part
mkdir /tmp/fat32
mount /dev/${sdcard}2 /tmp/fat32
cp uImage /tmp/fat32/
cp zImage /tmp/fat32/
cp imx28-evk.dtb /tmp/fat32/
dd if=u-boot.sd of=/dev/${sdcard}1
dd if=rootfs.full.img of=/dev/${sdcard}3bootlog
U-Boot 2020.07-rc4 (Jul 04 2020 - 00:14:52 +0800)
CPU: Freescale i.MX28 rev1.2 at 454 MHz
BOOT: SSP SD/MMC #0, 3V3
DRAM: 64 MiB
NAND: use legacy bch geometry
128 MiB
MMC: MXS MMC: 0
Loading Environment from MMC... *** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Net: FEC0 [PRIME]
Hit any key to stop autoboot: 0
switch to partitions #0, OK
mmc0 is current device
5300920 bytes read in 1600 ms (3.2 MiB/s)
Booting from mmc ...
22122 bytes read in 41 ms (526.4 KiB/s)
Kernel image @ 0x42000000 [ 0x000000 - 0x50e2b8 ]
## Flattened Device Tree blob at 41000000
Booting using the fdt blob at 0x41000000
Loading Device Tree to 43b39000, end 43b41669 ... OK
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 5.5.5-g7070cea-dirty (wnavy@wnavy-vm) (gcc version 9.2.0 (crosstool-NG 1.24.0.105_5659366)) #1 Tue Jul 7 00:38:11 CST 2020
[ 0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f
[ 0.000000] CPU: VIVT data cache, VIVT instruction cache
[ 0.000000] OF: fdt: Machine model: Freescale i.MX28 Evaluation Kit
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 16256
[ 0.000000] Kernel command line: console=ttyAMA0,115200 root=/dev/mmcblk0p3 rw rootwait
[ 0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 47544K/65536K available (7092K kernel code, 635K rwdata, 2648K rodata, 324K init, 6368K bss, 17992K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] Running RCU self tests
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] random: get_random_bytes called from start_kernel+0x2b4/0x4e0 with crng_init=0
[ 0.000000] clocksource: mxs_timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[ 0.000038] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
[ 0.002257] Console: colour dummy device 80x30
[ 0.002429] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 0.002491] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 0.002544] ... MAX_LOCK_DEPTH: 48
[ 0.002592] ... MAX_LOCKDEP_KEYS: 8192
[ 0.002638] ... CLASSHASH_SIZE: 4096
[ 0.002685] ... MAX_LOCKDEP_ENTRIES: 32768
[ 0.002733] ... MAX_LOCKDEP_CHAINS: 65536
[ 0.002780] ... CHAINHASH_SIZE: 32768
[ 0.002828] memory used by lock dependency info: 3997 kB
[ 0.002877] memory used for stack traces: 2112 kB
[ 0.002925] per task-struct memory footprint: 1536 bytes
[ 0.003267] Calibrating delay loop... 226.09 BogoMIPS (lpj=1130496)
[ 0.071546] pid_max: default: 32768 minimum: 301
[ 0.072633] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.072758] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.083465] CPU: Testing write buffer coherency: ok
[ 0.094288] Setting up static identity map for 0x40008400 - 0x40008458
[ 0.103232] devtmpfs: initialized
[ 0.178418] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.178695] futex hash table entries: 256 (order: 1, 11264 bytes, linear)
[ 0.180643] pinctrl core: initialized pinctrl subsystem
[ 0.196613] NET: Registered protocol family 16
[ 0.199970] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.428485] Serial: AMBA PL011 UART driver
[ 0.432586] 80074000.serial: ttyAMA0 at MMIO 0x80074000 (irq = 222, base_baud = 0) is a PL011 rev2
[ 0.713981] printk: console [ttyAMA0] enabled
[ 0.889110] mxs-dma 80004000.dma-apbh: initialized
[ 0.908854] mxs-dma 80024000.dma-apbx: initialized
[ 0.946217] SCSI subsystem initialized
[ 0.953954] usbcore: registered new interface driver usbfs
[ 0.960612] usbcore: registered new interface driver hub
[ 0.966849] usbcore: registered new device driver usb
[ 0.984452] pps_core: LinuxPPS API ver. 1 registered
[ 0.989523] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <[email protected]>
[ 0.999158] PTP clock support registered
[ 1.006525] Advanced Linux Sound Architecture Driver Initialized.
[ 1.024400] clocksource: Switched to clocksource mxs_timer
[ 2.655197] random: fast init done
[ 3.630761] NET: Registered protocol family 2
[ 3.641319] tcp_listen_portaddr_hash hash table entries: 128 (order: 0, 5120 bytes, linear)
[ 3.650374] TCP established hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 3.658496] TCP bind hash table entries: 1024 (order: 3, 36864 bytes, linear)
[ 3.666357] TCP: Hash tables configured (established 1024 bind 1024)
[ 3.674116] UDP hash table entries: 256 (order: 2, 20480 bytes, linear)
[ 3.681431] UDP-Lite hash table entries: 256 (order: 2, 20480 bytes, linear)
[ 3.690246] NET: Registered protocol family 1
[ 3.702827] RPC: Registered named UNIX socket transport module.
[ 3.709385] RPC: Registered udp transport module.
[ 3.714183] RPC: Registered tcp transport module.
[ 3.719191] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 3.742843] workingset: timestamp_bits=30 max_order=14 bucket_order=0
[ 3.852491] NFS: Registering the id_resolver key type
[ 3.860031] Key type id_resolver registered
[ 3.864847] Key type id_legacy registered
[ 3.869574] jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
[ 3.881311] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[ 3.889453] io scheduler mq-deadline registered
[ 3.894102] io scheduler kyber registered
[ 3.906141] pwm-backlight backlight: backlight supply power not found, using dummy regulator
[ 3.927051] 8006a000.serial: ttyAPP0 at MMIO 0x8006a000 (irq = 220, base_baud = 1500000) is a 8006a000.serial
[ 3.939733] mxs-auart 8006a000.serial: Found APPUART 3.1.0
[ 3.947635] 8006c000.serial: ttyAPP1 at MMIO 0x8006c000 (irq = 221, base_baud = 1500000) is a 8006c000.serial
[ 3.960154] mxs-auart 8006c000.serial: Found APPUART 3.1.0
[ 8.032732] nand: device found, Manufacturer ID: 0xc2, Chip ID: 0xf1
[ 8.039446] nand: Macronix NAND 128MiB 3,3V 8-bit
[ 8.044253] nand: 128 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
[ 8.052280] Scanning device for bad blocks
[ 8.612323] Bad eraseblock 850 at 0x000006a40000
[ 8.759365] gpmi-nand 8000c000.gpmi-nand: driver registered.
[ 8.797974] spi-nor spi1.0: unrecognized JEDEC id bytes: ff ff ff ff ff ff
[ 8.811453] libphy: Fixed MDIO Bus: probed
[ 8.967174] libphy: fec_enet_mii_bus: probed
[ 8.978260] usbcore: registered new interface driver asix
[ 8.984151] usbcore: registered new interface driver ax88179_178a
[ 8.991075] usbcore: registered new interface driver cdc_ether
[ 8.997805] usbcore: registered new interface driver smsc95xx
[ 9.004026] usbcore: registered new interface driver net1080
[ 9.010418] usbcore: registered new interface driver cdc_subset
[ 9.017062] usbcore: registered new interface driver zaurus
[ 9.023305] usbcore: registered new interface driver cdc_ncm
[ 9.029310] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 9.036939] usbcore: registered new interface driver usb-storage
[ 9.068170] ci_hdrc ci_hdrc.0: EHCI Host Controller
[ 9.074195] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
[ 9.104682] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[ 9.128549] hub 1-0:1.0: USB hub found
[ 9.133663] hub 1-0:1.0: 1 port detected
[ 9.158503] ci_hdrc ci_hdrc.1: EHCI Host Controller
[ 9.163730] ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 2
[ 9.194731] ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00
[ 9.208329] hub 2-0:1.0: USB hub found
[ 9.212604] hub 2-0:1.0: 1 port detected
[ 9.232317] stmp3xxx-rtc 80056000.rtc: registered as rtc0
[ 9.240114] i2c /dev entries driver
[ 9.263847] stmp3xxx_rtc_wdt stmp3xxx_rtc_wdt: initialized watchdog with heartbeat 19s
[ 9.280220] mxs-mmc 80010000.spi: Got WP GPIO
[ 9.316784] mxs-mmc 80010000.spi: initialized
[ 9.375456] mmc0: new high speed SDHC card at address 0007
[ 9.386819] usbcore: registered new interface driver usbhid
[ 9.392495] usbhid: USB HID core driver
[ 9.403055] mmcblk0: mmc0:0007 SD16G 14.5 GiB
[ 9.452132] mmcblk0: p1 p2 p3
[ 9.463335] imx28-pinctrl 80018000.pinctrl: pin SAIF0_MCLK already requested by leds; cannot claim for 80042000.saif
[ 9.474274] imx28-pinctrl 80018000.pinctrl: pin-116 (80042000.saif) status -22
[ 9.481850] imx28-pinctrl 80018000.pinctrl: could not request pin 116 (SAIF0_MCLK) from group saif0.0 on device 80018000.pinctrl
[ 9.493821] mxs-saif 80042000.saif: Error applying setting, reverse things back
[ 9.523013] mxs-saif: probe of 80042000.saif failed with error -22
[ 9.534272] mxs-sgtl5000 sound: failed to get mclk
[ 9.539583] mxs-sgtl5000: probe of sound failed with error -22
[ 9.547234] NET: Registered protocol family 17
[ 9.552400] Key type dns_resolver registered
[ 9.560733] registered taskstats version 1
[ 9.712756] stmp3xxx-rtc 80056000.rtc: setting system clock to 1970-01-01T13:08:19 UTC (47299)
[ 9.723350] ALSA device list:
[ 9.727181] No soundcards found.
[ 9.737929] uart-pl011 80074000.serial: no DMA platform data
[ 9.998528] EXT4-fs (mmcblk0p3): recovery complete
[ 10.021308] EXT4-fs (mmcblk0p3): mounted filesystem with ordered data mode. Opts: (null)
[ 10.030344] VFS: Mounted root (ext4 filesystem) on device 179:3.
[ 10.042110] devtmpfs: mounted
[ 10.047675] Freeing unused kernel memory: 324K
[ 10.052218] This architecture does not have kernel memory protection.
[ 10.058981] Run /sbin/init as init process
[ 10.418092] EXT4-fs (mmcblk0p3): re-mounted. Opts: (null)
mount: mounting /dev/mmcblk0p1 on /mnt/sdcard failed: Invalid argument
Starting syslogd: OK
Starting klogd: OK
Running sysctl: OK
Starting mdev... OK
modprobe: can't change directory to '/lib/modules': No such file or directory
Initializing random number generator: OK
Saving random seed: [ 15.269711] random: dd: uninitialized urandom read (512 bytes read)
OK
Starting network: [ 16.079916] Generic PHY 800f0000.ethernet-1:05: attached PHY driver [Generic PHY] (mii_bus:phy_addr=800f0000.ethernet-1:05, irq=POLL)
OK
Starting ntpd: OK
Welcome to EasyArm-i.MX280a
EasyArm-i.MX280a login: [ 19.228436] fec 800f0000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off
[ 40.266980] lcd-3v3: disabling
[ 40.270673] can-3v3: disabling
[ 40.273856] lcd-5v: disabling
[ 164.826088] random: crng init done
Welcome to EasyArm-i.MX280a
EasyArm-i.MX280a login: root
Password:
# cat /proc/version
Linux version 5.5.5-g7070cea-dirty (wnavy@wnavy-vm) (gcc version 9.2.0 (crosstool-NG 1.24.0.105_5659366)) #1 Tue Jul 7 00:38:11 CST 2020
# cat /proc/cpuinfo
processor : 0
model name : ARM926EJ-S rev 5 (v5l)
BogoMIPS : 226.09
Features : swp half thumb fastmult edsp java
CPU implementer : 0x41
CPU architecture: 5TEJ
CPU variant : 0x0
CPU part : 0x926
CPU revision : 5
Hardware : Freescale MXS (Device Tree)
Revision : 0000
Serial : 0000000000000000
# top
Mem: 21708K used, 26160K free, 40K shrd, 304K buff, 4712K cached
CPU: 0% usr 28% sys 0% nic 71% idle 0% io 0% irq 0% sirq
Load average: 0.02 0.06 0.02 1/39 145
PID PPID USER STAT VSZ %VSZ %CPU COMMAND
145 141 root R 2640 5% 29% top
139 1 root S 5384 11% 0% /usr/sbin/ntpd -g
104 1 root S 3028 6% 0% /sbin/mdev -df
141 1 root S 2768 6% 0% -sh
1 0 root S 2640 5% 0% init
88 1 root S 2640 5% 0% /sbin/syslogd -n
92 1 root S 2640 5% 0% /sbin/klogd -n
22 2 root IW 0 0% 0% [kworker/0:1-eve]
70 2 root IW< 0 0% 0% [kworker/0:1H-kb]
7 2 root SW 0 0% 0% [ksoftirqd/0]
5 2 root IW 0 0% 0% [kworker/u2:0-ev]
8 2 root SW 0 0% 0% [kdevtmpfs]
71 2 root SW 0 0% 0% [jbd2/mmcblk0p3-]
2 0 root SW 0 0% 0% [kthreadd]
3 2 root IW 0 0% 0% [kworker/0:0-pm]
4 2 root IW< 0 0% 0% [kworker/0:0H-kb]
6 2 root IW< 0 0% 0% [mm_percpu_wq]
9 2 root SW 0 0% 0% [khungtaskd]
10 2 root SW 0 0% 0% [oom_reaper]
11 2 root IW< 0 0% 0% [writeback]
#