本次提交了两个patch。一个是使用debugfs_regset32接口创建寄存器转储文件，自动创建通用debugfs文件写读回调函数。另一个是修复debugfs目录名称不正确，把hisi_spi65535改为hisi_spi0。

环境：FPGA
步骤：

1. 加载spi-hisi-kunpeng.ko
2. cd /sys/kernel/debug/
3. ls 查看debugfs目录是否注册，名称是否正确

验证日志【log】:
estuary:/$
estuary:/$ uname -a
Linux (none) 5.10.0+ #1 SMP Mon Feb 21 17:06:36 CST 2022 aarch64 GNU/Linux
estuary:/$
estuary:/$
estuary:/$ ls /boot/efi/EFI
ls: /boot/efi/EFI: No such file or directory
estuary:/$
estuary:/$
estuary:/$
estuary:/$ cd /lib/modules/5.10.0+/kernel/drivers/spi/
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$ ls
spi-cadence.ko spi-hisi-kunpeng.ko spi-pl022.ko
spi-dw-pci.ko spi-hisi-sfc-v3xx.ko spi-xlp.ko
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
</kernel/drivers/spi$ insmod spi-hisi-kunpeng.ko
[ 3848.386896][ T295] hisi-kunpeng-spi HISI03E1:00: hw version:0x30 max-freq:12
500 kHz
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
estuary:/lib/modules/5.10.0+/kernel/drivers/spi$
<.10.0+/kernel/drivers/spi$ cd /sys/kernel/debug/
estuary:/sys/kernel/debug$
estuary:/sys/kernel/debug$
estuary:/sys/kernel/debug$
estuary:/sys/kernel/debug$ ls
acpi extfrag regmap
bdi fault_around_bytes regulator
block frontswap sched_debug
cleancache gpio sched_features
clear_warn_once hid sleep_time
clk hisi_spi0 split_huge_pages
debug_enabled kprobes suspend_stats
device_component kvm swiotlb
devices_deferred megaraid_sas tracing
dma_buf memblock usb
dma_pools mpt3sas wakeup_sources
dmaengine pinctrl zsmalloc
dri pm_genpd zswap
dynamic_debug pwm
error_injection ras
estuary:/sys/kernel/debug$
estuary:/sys/kernel/debug$
estuary:/sys/kernel/debug$ lsmod
spi_hisi_kunpeng 16384 0 - Live 0xffffab30527a6000
vfio_iommu_type1 53248 0 - Live 0xffffab3052798000
vfio_pci 86016 0 - Live 0xffffab305276d000 (E)
vfio_virqfd 20480 1 vfio_pci, Live 0xffffab3052767000 (E)
vfio 40960 2 vfio_iommu_type1,vfio_pci, Live 0xffffab305275c000 (E)
sch_fq_codel 24576 1 - Live 0xffffab3052755000
aes_neon_bs 28672 0 - Live 0xffffab3052790000
aes_neon_blk 32768 1 aes_neon_bs, Live 0xffffab3052783000
aes_ce_blk 36864 0 - Live 0xffffab305274b000
aes_ce_cipher 20480 1 aes_ce_blk, Live 0xffffab3052745000
crypto_simd 24576 3 aes_neon_bs,aes_neon_blk,aes_ce_blk, Live 0xffffab305273e000
cryptd 24576 1 crypto_simd, Live 0xffffab3052737000
[ 4235.536054][ C0] random: fast init done
estuary:/sys/kernel/debug$
estuary:/sys/kernel/debug$

验证结果：能查看到debugfs已注册，注册的名称为hisi_spi0。