$ sigrok-cli -d fx2lafw  --samples=64 --config samplerate=12M --channels 0-7 -l 5
sr: [00:00.000004] log: libsigrok loglevel set to 5.
sr: [00:00.000872] backend: libsigrok 0.4.0-git-6e799d0/2:0:0 (rt: 0.4.0-git-6e799d0/2:0:0).
sr: [00:00.001598] backend: Libs: glib 2.40.2 (rt: 2.40.2/4002:0), libzip 0.10.1, libserialport 0.1.1/0:0:0 (rt: 0.1.1/0:0:0), libusb-1.0 1.0.17.10830, libftdi 0.20.
sr: [00:00.002287] backend: Host: x86_64-unknown-linux-gnu, little-endian.
sr: [00:00.002860] backend: SCPI backends: TCP, RPC, serial, USBTMC.
sr: [00:00.003493] backend: Sanity-checking all drivers.
sr: [00:00.004115] backend: Sanity-checking all input modules.
sr: [00:00.004695] backend: Sanity-checking all output modules.
sr: [00:00.005268] backend: Sanity-checking all transform modules.
srd: libsigrokdecode loglevel set to 5.
sr: [00:00.007170] hwdriver: Initializing driver 'fx2lafw'.
sr: [00:00.007832] ezusb: uploading firmware to device on 1.7
sr: [00:00.190774] ezusb: setting CPU reset mode on...
sr: [00:00.193907] ezusb: Uploading firmware at /usr/local/share/sigrok-firmware/fx2lafw-cypress-fx2.fw
sr: [00:00.197790] ezusb: Uploaded 4096 bytes
sr: [00:00.201828] ezusb: Uploaded 4024 bytes
sr: [00:00.202521] ezusb: Firmware upload done
sr: [00:00.203202] ezusb: setting CPU reset mode off...
sr: [00:00.206081] hwdriver: Scan of 'fx2lafw' found 1 devices.
sr: [00:00.206683] fx2lafw: Waiting for device to reset.
sr: [00:00.607759] fx2lafw: Waited 401ms.
sr: [00:00.708296] fx2lafw: Waited 502ms.
sr: [00:00.808643] fx2lafw: Waited 602ms.
sr: [00:00.909758] fx2lafw: Waited 703ms.
sr: [00:01.010110] fx2lafw: Waited 804ms.
sr: [00:01.110467] fx2lafw: Waited 904ms.
sr: [00:01.210978] fx2lafw: Waited 1005ms.
sr: [00:01.311480] fx2lafw: Waited 1105ms.
sr: [00:01.413445] fx2lafw: Waited 1207ms.
sr: [00:01.513876] fx2lafw: Waited 1308ms.
sr: [00:01.615619] fx2lafw: Waited 1409ms.
sr: [00:01.716252] fx2lafw: Waited 1510ms.
sr: [00:01.817852] fx2lafw: Waited 1611ms.
sr: [00:01.919300] fx2lafw: Waited 1713ms.
sr: [00:02.020729] fx2lafw: Waited 1814ms.
sr: [00:02.121323] fx2lafw: Waited 1915ms.
sr: [00:02.222785] fx2lafw: Waited 2016ms.
sr: [00:02.324202] fx2lafw: Waited 2118ms.
sr: [00:02.426308] fx2lafw: Waited 2220ms.
sr: [00:02.526831] fx2lafw: Waited 2320ms.
sr: [00:02.629143] fx2lafw: Waited 2423ms.
sr: [00:02.729559] fx2lafw: Waited 2523ms.
sr: [00:02.831085] fx2lafw: Waited 2625ms.
sr: [00:02.931520] fx2lafw: Waited 2725ms.
sr: [00:03.032806] fx2lafw: Waited 2826ms.
sr: [00:03.151926] fx2lafw: Opened device on 1.8 (logical) / usb/1-1 (physical), interface 0, firmware 1.1.
sr: [00:03.151996] fx2lafw: Detected REVID=1, it's a Cypress CY7C68013A (FX2LP).
sr: [00:03.152032] fx2lafw: Device came back after 2826ms.
sr: [00:03.152158] hwdriver: sr_config_set(): key 30000 (samplerate) sdi 0xfa9400 cg NULL -> uint64 12000000
sr: [00:03.152244] hwdriver: sr_config_set(): key 50001 (limit_samples) sdi 0xfa9400 cg NULL -> uint64 64
sr: [00:03.152324] session: Using thread-default main context.
sr: [00:03.152350] session: Starting.
sr: [00:03.153955] std: fx2lafw: Starting acquisition.
sr: [00:03.153983] std: fx2lafw: Sending SR_DF_HEADER packet.
sr: [00:03.154010] session: Running transform module 'nop'.
sr: [00:03.154033] transform/nop: Received packet of type 10000, passing on unmodified.
sr: [00:03.154056] session: bus: Received SR_DF_HEADER packet.
cli: Received SR_DF_HEADER.
sr: [00:03.154135] hwdriver: sr_config_get(): key 30000 (samplerate) sdi 0xfa9400 cg NULL -> uint64 12000000
sr: [00:03.154164] fx2lafw: GPIF delay = 3, clocksource = 48MHz.
sr: [00:03.156831] session: Running.
sr: [00:03.160968] usb: usb_source_dispatch: revents 0x04
sr: [00:03.161110] fx2lafw: receive_transfer(): status LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED received 120320 bytes.
sr: [00:03.161138] session: Running transform module 'nop'.
sr: [00:03.161160] transform/nop: Received packet of type 10004, passing on unmodified.
sr: [00:03.161183] session: bus: Received SR_DF_LOGIC packet (128 bytes, unitsize = 2).
cli: Received SR_DF_LOGIC (128 bytes, unitsize = 2).
sr: [00:03.161250] hwdriver: sr_config_get(): key 30000 (samplerate) sdi 0xfa9400 cg NULL -> uint64 12000000
libsigrok 0.4.0-git-6e799d0
Acquisition with 8/16 channels at 12 MHz
0:00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
1:00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
2:11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111
3:11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111
4:11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111
5:11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111
6:11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111
7:11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111
sr: [00:07.870864] session: Running transform module 'nop'.
sr: [00:07.872067] transform/nop: Received packet of type 10001, passing on unmodified.
sr: [00:07.873326] session: bus: Received SR_DF_END packet.
cli: Received SR_DF_END.
sr: [00:07.874211] usb: usb_source_finalize
sr: [00:07.874753] session: Stopping main loop...
sr: [00:07.875335] fx2lafw: fx2lafw: Closing device on 1.8 (logical) / usb/1-1 (physical) interface 0.
$ sigrok-cli -d fx2lafw  --samples=64 --config samplerate=24M --channels 0-7 -l 5
sr: [00:00.000002] log: libsigrok loglevel set to 5.
sr: [00:00.000765] backend: libsigrok 0.4.0-git-6e799d0/2:0:0 (rt: 0.4.0-git-6e799d0/2:0:0).
sr: [00:00.001404] backend: Libs: glib 2.40.2 (rt: 2.40.2/4002:0), libzip 0.10.1, libserialport 0.1.1/0:0:0 (rt: 0.1.1/0:0:0), libusb-1.0 1.0.17.10830, libftdi 0.20.
sr: [00:00.002056] backend: Host: x86_64-unknown-linux-gnu, little-endian.
sr: [00:00.002584] backend: SCPI backends: TCP, RPC, serial, USBTMC.
sr: [00:00.003100] backend: Sanity-checking all drivers.
sr: [00:00.003713] backend: Sanity-checking all input modules.
sr: [00:00.004214] backend: Sanity-checking all output modules.
sr: [00:00.004821] backend: Sanity-checking all transform modules.
srd: libsigrokdecode loglevel set to 5.
sr: [00:00.006598] hwdriver: Initializing driver 'fx2lafw'.
sr: [00:00.028548] fx2lafw: Found an fx2lafw device.
sr: [00:00.028893] hwdriver: Scan of 'fx2lafw' found 1 devices.
sr: [00:00.029022] fx2lafw: Firmware upload was not needed.
sr: [00:00.033501] fx2lafw: Opened device on 1.8 (logical) / usb/1-1 (physical), interface 0, firmware 1.1.
sr: [00:00.033593] fx2lafw: Detected REVID=1, it's a Cypress CY7C68013A (FX2LP).
sr: [00:00.033757] hwdriver: sr_config_set(): key 30000 (samplerate) sdi 0x243da60 cg NULL -> uint64 24000000
sr: [00:00.033807] hwdriver: sr_config_set(): key 50001 (limit_samples) sdi 0x243da60 cg NULL -> uint64 64
sr: [00:00.033888] session: Using thread-default main context.
sr: [00:00.033928] session: Starting.
sr: [00:00.036952] std: fx2lafw: Starting acquisition.
sr: [00:00.037017] std: fx2lafw: Sending SR_DF_HEADER packet.
sr: [00:00.037059] session: Running transform module 'nop'.
sr: [00:00.037092] transform/nop: Received packet of type 10000, passing on unmodified.
sr: [00:00.037146] session: bus: Received SR_DF_HEADER packet.
cli: Received SR_DF_HEADER.
sr: [00:00.037273] hwdriver: sr_config_get(): key 30000 (samplerate) sdi 0x243da60 cg NULL -> uint64 24000000
sr: [00:00.037327] fx2lafw: Unable to sample at 24000000Hz when collecting 16-bit samples.
sr: [00:09.568884] session: sr_session_start: could not start an acquisition (generic/unspecified error)
Failed to start session.