The pinctrl driver had been replaced with the upstream one in b756ea2a90
("ramips: replace pinctrl property names"), but the initial A1004ns support
patch did not reflect the changes. This commit updates its pinctrl property
names.
Fixes: 9169482f64 ("ramips: add support for ipTIME A1004ns")
Signed-off-by: Sungbo Eo <mans0n@gorani.run>
There are 2 different chips (w25q256fv and w25q256jv) that share
the same JEDEC ID. Only w25q256jv fully supports 4-byte opcodes.
Use SFDP header version to differentiate between them.
Fixes broken reboot on 8devices Habanero since f0f35fdac
Signed-off-by: Mantas Pucka <mantas@8devices.com>
ubnt er-x/xiaomi/netgear sercomm devices are known to have troble
extracting a big kernel from flash and has support for uncompressed
uimage
This commit uses uncompressed uimage with lzma-loader for these devices
to fix boot issue.
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Some devices have bootloaders with broken lzma code resulting in failed
decompression or corrupted kernel code.
This image recipe allows to sacrifice 5KB for OpenWrt LZMA loader and
take over the task of decompress kernel.
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
From kernel 4.20 msm-gpio driver is broken and cause the
malfunction of the buttons on every ipq806x target.
Add a patch to fix this.
Tested-by: Hannu Nyman <hannu.nyman@iki.fi>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
It adjusts the code to upstream changes from the commit 3c1bcc8614db
("net: ethernet: Convert phydev advertize and supported from u32 to link
mode")
Signed-off-by: Mathias Kresin <dev@kresin.me>
Since kernel 5.2 within netlink messages the NLA_F_NESTED nested flag is
validated. But swconfig/swlib doesn't set the flag for
SWITCH_ATTR_OP_VALUE_PORTS related netlink messages and assigning ports
to vlans via
swconfig dev switch0 vlan 1 set ports '0 1 2 3 4 6t'
Errors put with "Failed to set attribute: Invalid input data or
parameter".
Relax the validation rules and use the deprecated functions, to use the
same level of validation as it was till kernel 5.1. Depending on who has
swconfig related netlink messages implemented, there might be more
broken tools out there and we should keep backward compatibility if
possible.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Tested-by: Rafał Miłecki <rafal@milecki.pl>
RT-AC1300UHP has 256M memory and does not need to use ath10k-ct-smallbuffers.
Signed-off-by: AmadeusGhost <42570690+AmadeusGhost@users.noreply.github.com>
The conditional check introduced by this patch may trigger a NULL pointer
dereference in case the result of dev_net() is NULL.
Since the purpose of this patch is neither sufficiently explained and since
this patch apparently has never been submitted upstream despite it being in
the pending-* patch directory, I propose to drop it without replacement.
If the performance implications of dropping this patch are found to be
significiant, it should be reintroduced with proper description and
benchmark results.
Ref: https://bugs.openwrt.org/index.php?do=details&task_id=2943
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
RT-AC1300UHP has 256M memory and does not need to use ath10k-ct-smallbuffers.
Signed-off-by: AmadeusGhost <42570690+AmadeusGhost@users.noreply.github.com>
* ramips: increase HiWiFi HC5962 kernel partition to 4M
Increase kernel partition because 2M is insufficient for 4.19
Because the partition changes, previous version of OpenWrt cannot upgrade to this version
Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
* ramips: use all reserved space for HiWiFi HC5962
Idea was from ad6c6361f9 ("ath79: enable all space on Netgear ar9344-based WNDR routers")
These stock partitons: "backup", "hw_panic", "overly", firmware_backup", "opt"
do not contain any device-specific data and can be used for /overlay, resulting in
121M space
Users should erase those partitions with command `mtd erase <partition name>` prior to
upgrading to this version
Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
Co-authored-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
The Owl Loader (named after the codename that Atheros gave
these devices back in the day) has been accepted upstream.
This patch removes the "misc" driver OpenWrt had and adds
the remaining differences against the version that ships
with 5.4-rc1 into a separate "120-owl-loader-compat.patch"
file that can be cut down once AR71XX is being dealt with.
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
This commit enable 128M nand and disable pcie wake by default, pcie is
designed for 4G network cards instead of wireless network cards. Due to
boardname change, we should flash into ubi via opboot/pbboot.
1. fix typo: ucidef_set_interfaces_wan -> ucidef_set_interface_wan
2. change board name to mt7629-rfb to match upstream dts
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
* revert: ramips: gsw_mt7621: disable PORT 5 MAC RX/TX flow control
revert: ramips: gsw_mt7621: disable PORT 5 MAC RX/TX flow control by default
This revert c8f8e59
The TX/RX flow control is not the cause of the TX timeouts issue
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
* ramips: net/mediatek fix logical error
ramips: net/mediatek fix logical error
fe_empty_txd() should return `tx_ring_size - 1` on ring empty, and
return 0 on ring full.
* ramips: net/mediatek disable eee
ramips: net/mediatek disable eee
This disable eee for mt7530 ports, it causes the link down/up
issue, which happens when connecting to 100Mbit switch
Fixes: FS#1449
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
This time DTS fix, again from Sungbo Eo <mans0n@gorani.run>
ARM: dts: oxnas: Fix clear-mask property
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 9e5a25846f)
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Sungbo Eo <mans0n@gorani.run> submitted another patch fixing an error
on reboot:
irqchip/versatile-fpga: Apply clear-mask earlier
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 19af00850f)
* ramips: add xiaomi_miwifi-r3 support
Specification:
- CPU: 580 MHz
- Flash size: 128 MiB NAND
- RAM size: 128 MiB DDR2
- Wireless No1: SoC-integrated: MT7620A 2x2 MIMO 802.11b/g/n (2.4 GHz)
- Wireless No2: On-board chip: MT7612E 2x2 MIMO 802.11a/n/ac (5 GHz)
- Switch: MT7620 built-in 10/100 switch w/ vlan support
- USB: 2.0 x1
Flash instructions:
1. access ssh via https://wiki.openwrt.org/toh/xiaomi/mir3
2. in ssh:
nvram set flag_last_success=1
nvram set boot_wait=on
nvram set uart_en=1
nvram commit
mtd write lede-ramips-mt7620-miwifi-r3-squashfs-kernel1.bin kernel1
mtd write lede-ramips-mt7620-miwifi-r3-squashfs-rootfs0.bin rootfs0
reboot
If you want to revert back to stock fw while on LEDE:
insert usb stick (FAT/FAT32) with stock fw renamed to miwifi.bin
fw_setenv flag_last_success 0
power off the device
hold the reset button and power on the device, keep holding the reset button until yellow led starts blinking.
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
* ramips: add mt7620-nand driver for NAND flash
This add the mt7620-nand driver
and enable nand ubifs for subtarget mt7620
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
Co-authored-by: Chen Minqiang <ptpt52@gmail.com>
Specification:
- CPU: 580 MHz
- Flash size: 128 MiB NAND
- RAM size: 128 MiB DDR2
- Wireless No1: SoC-integrated: MT7620A 2x2 MIMO 802.11b/g/n (2.4 GHz)
- Wireless No2: On-board chip: MT7612E 2x2 MIMO 802.11a/n/ac (5 GHz)
- Switch: MT7620 built-in 10/100 switch w/ vlan support
- USB: 2.0 x1
Flash instructions:
1. access ssh via https://wiki.openwrt.org/toh/xiaomi/mir3
2. in ssh:
nvram set flag_last_success=1
nvram set boot_wait=on
nvram set uart_en=1
nvram commit
mtd write lede-ramips-mt7620-miwifi-r3-squashfs-kernel1.bin kernel1
mtd write lede-ramips-mt7620-miwifi-r3-squashfs-rootfs0.bin rootfs0
reboot
If you want to revert back to stock fw while on LEDE:
insert usb stick (FAT/FAT32) with stock fw renamed to miwifi.bin
fw_setenv flag_last_success 0
power off the device
hold the reset button and power on the device, keep holding the reset button until yellow led starts blinking.
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
kmod-i2c-mux-pca954x will not get into images unless kmod-i2c-mux is added to
DEVICE_PACKAGES as well.
Signed-off-by: Sungbo Eo <mans0n@gorani.run>
(cherry picked from commit dffbe668ab)
* ath79: add support for TP-Link TL-WR882N/WR885N/WR886N
This adds support for the various clones of the TL-WR885N recently
supported ("ath79: add support for TP-Link TL-WR885N v1"):
- tplink,tl-wr882n-v1
- tplink,tl-wr882n-v2
- tplink,tl-wr882n-v3
- tplink,tl-wr885n-v1
- tplink,tl-wr885n-v2
- tplink,tl-wr886n-v2
- tplink,tl-wr886n-v3
- tplink,tl-wr886n-v4
- tplink,tl-wr886n-v5
- tplink,tl-wr886n-v6
- tplink,tl-wr886n-v7
These devices are cloned in ar71xx. All models added in this patch are the same hardware CPU
WR885n V2 was tested.
Specifications:
- SOC: Qualcomm Atheros TP9343-AL3A
- CPU: 750MHz
- Flash: 2 MiB (AH1446 25Q16BS1G E5N102)
- RAM: 16 MiB (Zentel A3S28D40JTP-50)
- WLAN: Qualcomm Atheros TP9343 450Mbps
- Ethernet: Atheros AR8228/AR8229 4 port (100M)
添加TP9343芯片的路由器型号支持，TL-WR882N/WR885N/WR886N系列
* ath79: add support for MerCury MW4530R v1
重新添加水星MW4530R路由器支持
* Repair generate mw4530r firmware default is 8M
* Fix mw4530r forgot to add network settings
This bit is used to specify sdxc pinmap for mt76x8. Details available
in patch description.
To properly solve this problem and the other pinctrl hack in mtk-mmc
driver we'll need to write a dedicated pinctrl driver for mt76x8,
with the support for configuring AGPIO_MODE and RGCTL registers as
well as specially handling GPIO reservation/pinctrl setup for ESDMODE.
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
* ath79: add support for TP-Link TL-WR882N/WR885N/WR886N
This adds support for the various clones of the TL-WR885N recently
supported ("ath79: add support for TP-Link TL-WR885N v1"):
- tplink,tl-wr882n-v1
- tplink,tl-wr882n-v2
- tplink,tl-wr882n-v3
- tplink,tl-wr885n-v1
- tplink,tl-wr885n-v2
- tplink,tl-wr886n-v2
- tplink,tl-wr886n-v3
- tplink,tl-wr886n-v4
- tplink,tl-wr886n-v5
- tplink,tl-wr886n-v6
- tplink,tl-wr886n-v7
These devices are cloned in ar71xx. All models added in this patch are the same hardware CPU
WR885n V2 was tested.
Specifications:
- SOC: Qualcomm Atheros TP9343-AL3A
- CPU: 750MHz
- Flash: 2 MiB (AH1446 25Q16BS1G E5N102)
- RAM: 16 MiB (Zentel A3S28D40JTP-50)
- WLAN: Qualcomm Atheros TP9343 450Mbps
- Ethernet: Atheros AR8228/AR8229 4 port (100M)
添加TP9343芯片的路由器型号支持，TL-WR882N/WR885N/WR886N系列
* ath79: add support for MerCury MW4530R v1
重新添加水星MW4530R路由器支持
* Repair generate mw4530r firmware default is 8M
Generate a cpximg that is compatible with the cpximg loader in Compex' u-boot.
The cpximg loader can be started either by holding the reset button during power
up or by entering the u-boot prompt and entering 'cpximg'.
Once it's running, a TFTP-server under 192.168.1.1 will accept an image
appropriate for the board revision that is etched on the board (e.g. 6A04).
The image can be pushed using tftp:
tftp -v -m binary 192.168.1.1 -c put openwrt-ipq40xx-generic-compex_wpj428-squashfs-cpximg-6a04.bin
cpximg files can also be used with the sysupgrade utility in stock images.
(add SSH key in luci for root access)
In mkmylofw_32m, the calculation of the "partition size" has been preferred
to just padding the partition as this will result in less block transfers
during flashing (while the additional complexity is bearable).
Signed-off-by: Leon M. George <leon@georgemail.eu>
Co-developed-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Leave as enabled by default for mediatek. Also remove obsolete
settings from when packet steering was moved from netifd to a
simplified hotplug script.
Signed-off-by: Alan Swanson <reiver@improbability.net>
The AVM FRITZ!WLAN Repeater 450E's WPS button is not active low.
Correct the active low flag to avoid unintenional activation of
failsafe mode on boot.
Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit 1d4f2ca610)
Global attributes enable_mirror_tx/enable_mirror_rx depend on runtime
value of another global attribute mirror_source_port which just resides
in the memory
The same functionality can be achieved by directly setting port
attribute of the same names. E.g. the following two groups of commands
achieve the same thing
swconfig dev switch0 set mirror_source_port 3
swconfig dev switch0 set enable_mirror_tx 1
swconfig dev switch0 set mirror_source_port 4
swconfig dev switch0 set enable_mirror_tx 1
swconfig dev switch0 port 3 set enable_mirror_tx 1
swconfig dev switch0 port 4 set enable_mirror_tx 1
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
This patch addresses several issues for D-Link DIR-810L:
- add correct button codes
- harmonize button node names
- use generic flash@0
- remove unused pin groups from state_default
- improve sorting of properties
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Tested-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>
Idea was from ad6c6361f9 ("ath79: enable all space on Netgear ar9344-based WNDR routers")
These stock partitons: "backup", "hw_panic", "overly", firmware_backup", "opt"
do not contain any device-specific data and can be used for /overlay, resulting in
121M space
Users should erase those partitions with command `mtd erase <partition name>` prior to
upgrading to this version
Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
Increase kernel partition because 2M is insufficient for 4.19
Because the partition changes, previous version of OpenWrt cannot upgrade to this version
Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
Specifications:
* SoC: MT7621AT
* RAM: 128MB
* Flash: 16MB NOR SPI flash
* WiFi: MT7615N (2.4GHz) and MT7615N (5Ghz)
* LAN: 5x1000M
* Firmware layout is Uboot with extra 96 bytes in header
* Base PCB is AP-MTKH7-0002
* LEDs Power Green,Power Orange,Internet Green,Internet Orange
* LEDs "2.4G" Green & "5G" Green connected directly to wifi module
* Buttons Reset,WPS,WIFI
Flash instruction:
Upload image via emergency recovery mode via Windows "not working with Linux"
Push and hold reset button (on the bottom of the device) until power led starts flashing (about 10 secs or so) while plugging in the power cable.
Give it ~30 seconds, to boot the recovery mode GUI
Connect your client computer to LAN1 of the device
Set your client IP address manually to 192.168.0.2 / 255.255.255.0.
Call the recovery page for the device at http://192.168.0.1
Use the provided emergency web GUI to upload and flash a new firmware to the device
MAC addresses:
lan factory 0xe000 *:55 (label)
wan factory 0xe006 *:58
2.4 GHz factory 0x0004 *:56
5.0 GHz factory 0x8004 *:57
Signed-off-by: Alan Luck <luckyhome2008@gmail.com>
When changing the LED names for the Archer C7 to represent the correct
color, a migration for existing UCI entries was not created.
Add a migration to keep existing LED configurations working.
Fixes commit c79c001b59 ("ar71xx: Archer C7 v1 LED names and RFKILL
fixes")
Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit 4349d4c682)
It has been notice a buf in L2 cache scaling where the scaling is not
done proprely if the frequency is set to the initial state before
the new frequency.
From: https://patchwork.kernel.org/patch/10565443/
* The clocks are set to aux clock rate first to make sure the
* secondary mux is not sourcing off of QSB. The rate is then set to
* two different rates to force a HFPLL reinit under all
* circumstances.
In the initial stage of boot to force a new frequency to apply, is
needed to first set the frequency back to the lowest one (aux_rate)
and then to the target one. This force and make sure the controller
actually switch the frequency to the right one. Apply the same
mechanism to L2 frequency scaling. Before scaling to the target
frequency, first set the frequency to the aux_rate to force the
transition, then scale it to the target frequency. Doing the wrong way
can produce unexpected results and could lock the scaling mechanism
until a full reboot is done (Causing a full reset by the krait-cc driver)
From: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=77612720a2362230af726baa4149c40ec7a7fb05
When the Hfplls are reprogrammed during the rate change,
the primary muxes which are sourced from the same hfpll
for higher frequencies, needs to be switched to the 'safe
secondary mux' as the parent for that small window. This
is done by registering a clk notifier for the muxes and
switching to the safe parent in the PRE_RATE_CHANGE notifier
and back to the original parent in the POST_RATE_CHANGE notifier.
This should apply also to L2 scaling... as we can't relly use
the notifier, we manually do this on L2 scaling.
Tested-By: Marc Benoit <marcb62185@gmail.com> [19.07: R7800]
Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> [nbg6817/ipq8065]
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
(cherry picked from commit 5ab9c0b388)
Voltage tolerance is accounted per core, not per cpu, so add
missing DT entry.
Tested-By: Marc Benoit <marcb62185@gmail.com> [19.07: R7800]
Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
(cherry picked from commit 77e7d6c20d)
This is still missing a lot of love but people want to start working on it
so lets give them a common baseline.
Signed-off-by: John Crispin <john@phrozen.org>
From LGA1150 dalao (https://github.com/LGA1150/openwrt)
Warning: The compiled firmware only supports flashing under OpBoot.
MobiPromo CM520-79F is an AC1300 dual band router based on IPQ4019
Specification:
SoC/Wireless: QCA IPQ4019
RAM: 512MiB
Flash: 128MiB SLC NAND
Ethernet PHY: QCA8075
Ethernet ports: 1x WAN, 2x LAN
LEDs: 7 LEDs
2 (USB, CAN) are GPIO
other 5 (2.4G, 5G, LAN1, LAN2, WAN) are connected to a shift
register
Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
ipq40xx: fix build error for cm520-79f (#30)
This commit fix 94a743ea53
Signed-off-by: AmadeusGhost <amadeus@jmu.edu.cn>
CM520-79F: fix wan port (#33)
This commit fix 223124e
Signed-off-by: AmadeusGhost <amadeus@jmu.edu.cn>
CM520-79F: disable vlan
Co-authored-by: AmadeusGhost <42570690+AmadeusGhost@users.noreply.github.com>
This fixes the following compile problem with kernel 4.9 on lantiq:
drivers/mtd/mtdsplit/mtdsplit_uimage.c:244:34: error: array type has incomplete element type 'struct of_device_id'
static const struct of_device_id mtdsplit_uimage_of_match_table[] = {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/mtd/mtdsplit/mtdsplit_uimage.c:245:4: error: field name not in record or union initializer
{ .compatible = "denx,uimage" },
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit sync ipq40xx from openwrt and x-wrt.
1. ac58u: use ath10k-ct-smallbuffers instead of ath10k, avoid memory
explosion.
2. hugo-ac1200: It seems that only one device, so move the content of
dtsi to dts.
Signed-off-by: AmadeusGhost <amadeus@jmu.edu.cn>
ipq40xx: add support for ASUS RT-ACRH17/RT-AC82U/RT-AC42U
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
ipq40xx: easy install for ASUS RT-AC58U/RT-ACRH13
This patch make it easy to flash via web upgrade from factory firmware.
idea from 981213
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
* ath79: add support for TP-Link TL-WR882N/WR885N/WR886N
This adds support for the various clones of the TL-WR885N recently
supported ("ath79: add support for TP-Link TL-WR885N v1"):
- tplink,tl-wr882n-v1
- tplink,tl-wr882n-v2
- tplink,tl-wr882n-v3
- tplink,tl-wr885n-v1
- tplink,tl-wr885n-v2
- tplink,tl-wr886n-v2
- tplink,tl-wr886n-v3
- tplink,tl-wr886n-v4
- tplink,tl-wr886n-v5
- tplink,tl-wr886n-v6
- tplink,tl-wr886n-v7
These devices are cloned in ar71xx. All models added in this patch are the same hardware CPU
WR885n V2 was tested.
Specifications:
- SOC: Qualcomm Atheros TP9343-AL3A
- CPU: 750MHz
- Flash: 2 MiB (AH1446 25Q16BS1G E5N102)
- RAM: 16 MiB (Zentel A3S28D40JTP-50)
- WLAN: Qualcomm Atheros TP9343 450Mbps
- Ethernet: Atheros AR8228/AR8229 4 port (100M)
添加TP9343芯片的路由器型号支持，TL-WR882N/WR885N/WR886N系列
* ath79: add support for MerCury MW4530R v1
重新添加水星MW4530R路由器支持
Since commit f8c55dc ("MIPS: use generic dma noncoherent ops for
simple noncoherent platforms") changed MIPS dma handling, the mmc
driver fails because it doesn't have a dma mask is set.
So set the correct dma mask.
Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
Co-authored-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
This commit sync ramips source code from openwrt master.
1. ramips: gsw_mt7621: disable PORT 5 MAC RX/TX flow control by default
2. ramips: allow to set switchdev by board in ramips_set_preinit_iface
3. kernel: fix typos in KernelPackage description
* generic: support mtd-mac-address-ascii
It supports formats of both 001122334455 and 00:11:22:33:44:55
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
* ramips: add JDCloud
Co-authored-by: Yousong Zhou <yszhou4tech@gmail.com>
From LGA1150 dalao (https://github.com/LGA1150/openwrt)
Warning: The compiled firmware only supports flashing under OpBoot.
MobiPromo CM520-79F is an AC1300 dual band router based on IPQ4019
Specification:
SoC/Wireless: QCA IPQ4019
RAM: 512MiB
Flash: 128MiB SLC NAND
Ethernet PHY: QCA8075
Ethernet ports: 1x WAN, 2x LAN
LEDs: 7 LEDs
2 (USB, CAN) are GPIO
other 5 (2.4G, 5G, LAN1, LAN2, WAN) are connected to a shift
register
Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
