Most people are still on the 3.8 kernel. Gerald
On Fri, Feb 21, 2014 at 2:07 AM, <[email protected]> wrote: > Is there really nobody interested in using the GPMC on the BeagleBone > Black? > > > Am Dienstag, 18. Februar 2014 11:35:06 UTC+1 schrieb [email protected]: > >> I seems that what you are trying to do is to setup GPMC access on the >> BeagleBone Black using kernel 3.12.x. The steps to do this are as follows: >> >> (1) You must boot using an external micro SDHC card because the internal >> eMMC must be disabled >> (2) Disable eMMC and HDMI in uEnv.txt by adding optargs=capemgr.disable_ >> partno=BB-BONE-EMMC-2G,BB-BONELT-HDMI,BB-BONELT-HDMIN >> (3) After booting cape manager will still load both capes. The must be >> removed manually. >> (4) In the sources of kernel 3.12.x we must modify >> /arch/arm/boot/dts/am335x-boneblack.dts to free up the reset pin for the >> eMMC device. This is done by changing status from "ok" to disabled in >> section &mmc2 >> (5) It should now be possible to load your custom .dts file without any >> warnings >> >> Unfortunately, the GPMC is still not working in kernel 3.12. I have >> tested this using 3.12.8 and 3.12.10. I cannot see any activity on the GPMC >> signals. The same procedure is working in kernel 3.8.13. >> >> >> >> Am Freitag, 17. Januar 2014 17:55:11 UTC+1 schrieb Drew Moore: >>> >>> Thanks for responding.. >>> >>> I did >>> grep clkout2 *.dts >>> in both directories and found that clkout2 didn't show up in the 3.8 but >>> did show up in 3.12 >>> in 3.12 it shows up in am335x-evm.dts and also am335x-evmsk.dts.. (and >>> dove-cubox.dts but I don't think that is related) >>> >>> I also just noticed that it also shows up in am335x-bone-common.dtsi, >>> (3.12) which now seems more likely to be the beaglebone related file. >>> >>> Here's that chunk from my device tree file.. >>> >>> fragment@0 { >>> target = <&am33xx_pinmux>; >>> __overlay__ { >>> gpmc_pins: pinmux_gpmc_pins { >>> pinctrl-single,pins = < >>> /* 0x20 = Fast, RX_enabled, pullup, pullup_enable, >>> mode 0 */ >>> 0x000 0x20 /* gpmc_ad0.gpmc_ad0 MODE0 | INPUT | >>> PULLUP */ >>> 0x004 0x20 /* gpmc_ad1.gpmc_ad1 MODE0 | INPUT | >>> PULLUP */ >>> 0x008 0x20 /* gpmc_ad2.gpmc_ad2 MODE0 | INPUT | >>> PULLUP */ >>> 0x00C 0x20 /* gpmc_ad3.gpmc_ad3 MODE0 | INPUT | >>> PULLUP */ >>> 0x010 0x20 /* gpmc_ad4.gpmc_ad4 MODE0 | INPUT | >>> PULLUP */ >>> 0x014 0x20 /* gpmc_ad5.gpmc_ad5 MODE0 | INPUT | >>> PULLUP */ >>> 0x018 0x20 /* gpmc_ad6.gpmc_ad6 MODE0 | INPUT | >>> PULLUP */ >>> 0x01C 0x20 /* gpmc_ad7.gpmc_ad7 MODE0 | INPUT | >>> PULLUP */ >>> 0x020 0x20 /* gpmc_ad8.gpmc_ad8 MODE0 | INPUT | >>> PULLUP */ >>> 0x024 0x20 /* gpmc_ad9.gpmc_ad9 MODE0 | INPUT | >>> PULLUP */ >>> 0x028 0x20 /* gpmc_ad10.gpmc_ad10 MODE0 | INPUT | >>> PULLUP */ >>> 0x02C 0x20 /* gpmc_ad11.gpmc_ad11 MODE0 | INPUT | >>> PULLUP */ >>> 0x030 0x20 /* gpmc_ad12.gpmc_ad12 MODE0 | INPUT | >>> PULLUP */ >>> 0x034 0x20 /* gpmc_ad13.gpmc_ad13 MODE0 | INPUT | >>> PULLUP */ >>> 0x038 0x20 /* gpmc_ad14.gpmc_ad14 MODE0 | INPUT | >>> PULLUP */ >>> 0x03C 0x20 /* gpmc_ad15.gpmc_ad15 MODE0 | INPUT | >>> PULLUP */ >>> >>> 0x078 0x04 /* gpmc_ben1.gpmc_dir MODE4 | OUTPUT */ >>> 0x080 0x00 /* gpmc_cscn1.gpmc_cscn1 MODE0 | >>> OUTPUT */ >>> 0x08C 0x00 /* gpmc_clk.gpmc_clk MODE0 | OUTPUT */ >>> 0x090 0x00 /* gpmc_advn_ale.gpmc_advn_ale MODE0 | >>> OUTPUT */ >>> 0x094 0x00 /* gpmc_oen_ren.gpmc_oen_ren MODE0 | >>> OUTPUT */ >>> 0x098 0x00 /* gpmc_wen.gpmc_wen MODE0 | OUTPUT */ >>> 0x09C 0x00 /* gpmc_ben0_cle.gpmc_ben0_cle MODE0 | >>> OUTPUT */ >>> 0x1b4 0x03 /* xdma_event_intr1.clkout2 MODE3 | >>> OUTPUT */ >>> >; >>> }; >>> }; >>> }; >>> >>> I used BB-BONE-CAM3 as a starting point but yes, I'm mostly guessing at >>> what this stuff means. >>> My next guess is that the last line above is in the wrong section.. >>> clkout2 is not a gpmc pin. >>> >>> I don't have any /include/ lines in my file.. just >>> compatible = "ti,beaglebone", "ti,beaglebone-black"; >>> from the CAM3 file I modified. >>> >>> >>> >>> -- > 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]. > For more options, visit https://groups.google.com/groups/opt_out. > -- 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]. For more options, visit https://groups.google.com/groups/opt_out.
