On Tue, 2022-02-22 at 23:39 +0100, Birger Koblitz wrote: > Hi, > > the information on the external GPIO resetting the board of > the Zyxel GS1900-48 comes from the hardware configuration > reported by the stock firmware. It says: > GS1900# show board > [...] > ====== Reset ================= > Type: GPIO > GPIO: EXT_5 > [...] > Using the rtk gpio commands in u-boot this can be confirmed.
Can you list the commands that you used to test this? My bootloader only supports "rtk network ..." and "cst pinSet ...". > On 22/02/2022 23:00, Sander Vanheule wrote: > > On Mon, 2022-02-21 at 21:23 +0100, Birger Koblitz wrote: > > > Hi, > > > > > > > > I just checked with my multimeter, and while the GPIO5 on the RTL8231 > > > > does go > > > > high/low > > > > when I set the output high/low from Linux, my device certainly doesn't > > > > reset. The > > > > other > > > > GPIO lines on the chip do work, since SFP modules are correctly > > > > detected. > > > > > > > > Birger, just to be sure, can you confirm that your device does reset > > > > with GPIO5 on > > > > the > > > > RTL8231? > > > > > > Yes, it does.There is a warning, but then it reliably resets. That was > > > why I left it > > > in as is. > > > > I had another hard look at my board, to check if something may be wrong > > physically, > > but I > > cannot find anything. My device's board looks identical to the pictures on > > the switch > > wiki > > [1], which I think you uploaded earlier. > > > > There is some reset logic on the board [2], but I cannot figure out how > > GPIO5 would be > > connected to it electrically. Unless I missed a via connecting to that pin > > on the > > RTL8231, > > GPIO5 only appears to lead to TP2. GPIO5/TP2 does not appear to be connected > > electrically > > to any part of the circuit next to SW1. I could add a bodge wire to connect > > TP2 to pad > > U25:3, but gpio-restart should really work on unmodified hardware. > > > > [1] https://svanheule.net/switches/gs1900-48#board_details > > [2] https://svanheule.net/switches/gs1900-48#hard_reset_circuit Having another look at the source code of gpio-restart, the WARNING-s I reported in the patch's commit message occur at the following points of the GPIO output waveform: |< 100ms >|< 100 ms >|< 3000 ms >|< Restart failed _____|_________| |_______________|__ [ active ] _____X \__________/ [inactive] | | | | | | | ^ WARN @ drivers/power/reset/gpio-restart.c:46 | | | | | ^ WARN @ drivers/gpio/gpiolib.c:3098 | ^ WARN @ drivers/gpio/gpiolib.c:3098 | ^ Restart should already occur here If everything is set up correctly, the system should restart before execution reaches the point where a warning can be emitted. If you say that you see a warning (any at all), AFAICT that means gpio-restart is not working. As they say, the proof of the pudding is in the eating, so I soldered a jumper wire between the RTL8231's GPIO5 pin (U38:25) and the line driven by the hard reset button (U25:3) [https://svanheule.net/switches/gs1900-48#hard_reset_circuit]. As expected from the analysis above, this results in a system rebooting without _any_ warning (using an initramfs from yesterday's snapshot builds): root@OpenWrt:/# reboot root@OpenWrt:/# [ 185.092891] rtl83xx_fib_event: FIB_RULE ADD/DELL for IPv6 not supported [ 185.101879] rtl83xx_fib_event: FIB_RULE ADD/DELL for IPv6 not supported [ 185.111835] rtl83xx_fib_event: FIB_RULE ADD/DELL for IPv6 not supported [ 185.120484] rtl83xx_fib4_del: found a route with id 1, nh-id 0 [ 185.127681] rtl83xx-switch switch@1b000000: unknown nexthop, id 0 [ 185.149505] rtl83xx-switch switch@1b000000: unknown nexthop, id 0 [ 185.157262] rtl83xx_fib4_del: found a route with id 2, nh-id 0 [ 185.164418] rtl83xx-switch switch@1b000000: unknown nexthop, id 0 [ 185.173391] rtl83xx_fib4_del: no such gateway: 0.0.0.0 [ 185.225492] device lan01 left promiscuous mode [ 185.230976] switch: port 1(lan01) entered disabled state ... [ 187.735562] device lan50 left promiscuous mode [ 187.741075] switch: port 50(lan50) entered disabled state [ 187.794104] in rtl838x_eth_stop [ 187.797945] rtl838x-eth 1b00a300.ethernet eth0: Link is Down [ 188.329431] rtl83xx_fib_event: FIB_RULE ADD/DELL for IPv6 not supported [ 188.337562] rtl83xx_fib_event: FIB_RULE ADD/DELL for IPv6 not supported [ 188.345649] rtl83xx_fib_event: FIB_RULE ADD/DELL for IPv6 not supported [ 188.353736] rtl83xx_fib_event: FIB_RULE ADD/DELL for IPv6 not supported [ 188.543709] rtl83xx_fib4_del: no such gateway: 0.0.0.0 [ 188.549982] rtl83xx_fib4_del: no such gateway: 0.0.0.0 [ 188.559077] rtl83xx_fib_event: FIB_RULE ADD/DELL for IPv6 not supported [ 188.567226] rtl83xx_fib_event: FIB_RULE ADD/DELL for IPv6 not supported [ 188.576283] rtl83xx_fib4_del: no such gateway: 0.0.0.0 [ 188.582679] rtl83xx_fib4_del: no such gateway: 0.0.0.0 [ 192.871878] reboot: Restarting system U-Boot Version: 2.0.0.59413 (Jul 08 2015 - 10:01:28) CPU: 750MHz DRAM: 128 MB FLASH: 16 MB Model: ZyXEL_GS1900_48 SN: S182L05000541 Best, Sander _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
