#linux-rockchip on 2017-10-17 — irc logs at freenode.irclog.whitequark.org

2017-05-08 04:47 ChanServ changed the topic of #linux-rockchip to: Rockchip development discussion | IRC log http://irclog.whitequark.org/linux-rockchip | Community GH https://github.com/linux-rockchip | Rockchip GH https://github.com/rockchip-linux | ML https://groups.google.com/group/linux-rockchip

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13:39 <dni_> hello, i want to put linux on my rk3229 device MX4N-V02. Has Someone found the uart pins on that device? Any help?

13:42 <phh> wow, so many unpopulated pads

13:44 <dni_> is there an uboot for dual boot from sd card?

13:44 <phh> well, rockchip's u-boot does that, so the one you've got on your board should already do that

13:45 <phh> then, if you want to reduce problems, you can erase the bootloader on the emmc

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13:46 <phh> for the serial, usb otg D+/D- is remuxable to uart2

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14:07 <dni_> there is now otg port

14:07 <dni_> no not now^^

14:23 <dni_> but if the boot from sd card works, then we just need an image for the rk3229

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14:34 <mmind00> dni_: on rk3229 sdmmc and uart pins are shared, so you can just attach clips to the correct solder points of the sd-card slot

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14:36 <mmind00> dni_: I'm using that on a MX4V_V20 which doesn't expose any separate uart points

14:37 <dni_> ah ok, thx i will try

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15:14 <dni_> hmm i get no readable output over the sdmmc port with my usb ttl converter

15:15 <dni_> 8N1 115200

15:16 <phh> try 1.5M?

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15:21 <dni_> yeah there it is :-)

15:27 <phh> I wish there was a shop with usb <= serial <= ftdi <= usb, and emmc <= serial <= ftdi <= usb cables :)

15:27 <dni_> :-P

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15:38 <dni_> i think the pin sharing (mmc + uart) is a problem... after mmc init there is no readable output anymore

15:40 <phh> disable mmc in the dts?

15:41 <dni_> but i want to know why my sdcard is not booting :-)

15:42 <phh> uuhhh

15:49 <dni_> has someone running linux on an rk3229 device?

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16:43 <dni_> it seems that the installed uboot ignores the sdcard at boot

16:49 <dni_> https://pastebin.com/124CUj1M

17:01 <phh> well then zero the installed u-boot

17:03 <phh> well, first you might want an usb a <=> usb a cable

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17:17 <xevious> dni_: In case you haven't found this page yet... http://opensource.rock-chips.com/wiki_Boot_option

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