We just received a Maxim 3107 evaluation board and WERE planning on interfacing it to the BeagleBoard-X15 to try to bring up extra UART ports over SPI/I2C on the BBX15, but then we found the room for a USB hub in place of the Maxim chips on our custom board. Nonetheless, if there's anything you would like me (as a Linux newbie) to try on this setup (BBX15<->Maxim 3107 EVM) I will try to get around to it as a side project.... Thanks!
On Tuesday, July 11, 2017 at 7:13:30 AM UTC-5, [email protected] wrote: > > Hi, > > Did you got this working ? If so please can you post the solution. > > On Wednesday, 20 July 2016 18:43:34 UTC+5:30, Laurits Telle Riple wrote: >> >> I am trying to get MAX14830 >> <https://www.maximintegrated.com/en/products/interface/controllers-expanders/MAX14830.html> >> >> to work with beaglebone black using max310x >> <https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/serial/maxim%2Cmax310x.txt>driver >> >> over spi. With my dts, the overlay gets loaded, but i dont get any new >> devices in /dev. With my oscilloscope i can see that nothing happens and >> that CS is low (Active low, so something is wrong). I dont understand what >> I am doing wrong. I have the chip connected to a 4Mhz external crystal. >> >> Output from dmesg after loading manually: >> >> [ 212.403551] bone_capemgr bone_capemgr: part_number 'BB-MAX14830-01', >> version 'N/A' >> [ 212.411232] bone_capemgr bone_capemgr: slot #6: override >> [ 212.416720] bone_capemgr bone_capemgr: Using override eeprom data at >> slot 6 >> [ 212.423786] bone_capemgr bone_capemgr: slot #6: 'Override Board >> Name,00A0,Override Manuf,BB-MAX14830-01' >> [ 212.461917] bone_capemgr bone_capemgr: slot #6: dtbo >> 'BB-MAX14830-01-00A0.dtbo' loaded; overlay id #0 >> >> modalias: >> >> debian@arm:~$ cat /sys/bus/spi/devices/*/modalias >> spi:max14830 >> >> >> DTS: >> >> /dts-v1/; >> /plugin/; >> >> >> / { >> compatible = "ti,beaglebone", "ti,beaglebone-black"; >> part-number = "BB-MAX14830-01"; >> >> /* state the resources this cape uses */ >> exclusive-use = >> /* the pin header uses */ >> "P9.25", /* spi irq: gpio3_21 */ >> "P9.31", /* spi: spi1_sclk */ >> "P9.29", /* spi: spi1_d0 */ >> "P9.30", /* spi: spi1_d1 */ >> "P9.28", /* spi: spi1_cs0 */ >> /* the hardware IP uses */ >> "gpio3_21", >> "spi1"; >> >> fragment@0 { >> target = <&am33xx_pinmux>; >> __overlay__ { >> bone_14830_spi1_pins: pinmux_bone_14830_spi1_pins { >> pinctrl-single,pins = < >> 0x190 0x33 /* >> mcasp0_aclkx.spi1_sclk, RX_ENABLED | PULLUP | MODE3 */ >> 0x194 0x33 /* >> mcasp0_fsx.spi1_d0, RX_ENABLED | PULLUP | MODE3 */ >> 0x198 0x13 /* >> mcasp0_axr0.spi1_d1, OUTPUT_PULLUP | MODE3 */ >> 0x19c 0x13 /* >> mcasp0_ahclkr.spi1_cs0, OUTPUT_PULLUP | MODE3 */ >> >; >> }; >> >> bone_14830_pins: pinmux_bone_14830_pins { >> pinctrl-single,pins = < >> 0x1ac 0x37 /* >> mcasp0_ahclkx.gpio3_21, RX_ENABLED | PULLUP | MODE7 */ >> >; >> }; >> }; >> }; >> >> fragment@1 { >> target = <&spi1>; >> __overlay__ { >> #address-cells = <1>; >> #size-cells = <0>; >> status = "okay"; >> pinctrl-names = "default"; >> pinctrl-0 = <&bone_14830_spi1_pins>; >> max14830@0 { >> compatible = "maxim,max14830"; >> reg = <0>; /* cs0 */ >> mode=<0>; >> spi-max-frequency=<1000000>; >> >> pinctrl-names="default"; >> pinctrl-0 = <&bone_14830_pins>; >> clocks=<&clk4m>; >> clock-names="xtal"; >> interrupt-parent = <&gpio3>; >> interrupts = <21 2>; // Edge Falling >> >> clk4m: clk4m@10 { >> compatible = "fixed-clock"; >> #clock-cells = <0>; >> clock-frequency = <4000000>; >> }; >> }; >> }; >> }; >> }; >> >> >> >> >> >> >> >> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/534257d3-eb9d-4241-bc3e-ef52a0841893%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
