those mappings are correct GPIO1_28 P9-12 U18 = mapping /sys/class/gpio60 GPIO1_16 P9-15 R13 = mapping /sys/class/gpio48
On 2/21/2018 12:18 PM, Drew Fustini wrote: > On Wed, Feb 21, 2018 at 11:01 AM, David Lechner <da...@lechnology.com> wrote: >> Are you sure your phandles are correct here? They don't match the comments. >> Should it be <&gpio1 16 0> instead? >> >>> + reset-gpios = <&gpio1 16 0>; /* >>> reset:60 P9.12 GPIO1_28 */ >> >> And then <&gpio1 28 0> here? > Here is the full BB-SPIDEV1-00A0.dts: > https://gist.github.com/pdp7/aee5664598059c9b9a9020f107957f80 > > I have P9.12 connected to LCD reset pin. I have P9.15 connected to > LCD dc pin. For fbtft driver, this translated to GPIO_60 for reset > and GPIO_48 for dc. This is based on this pinout diagram: > https://elinux.org/File:Cape_expansion_headers.PNG > > For this dts file, I was trying to figure out what appropriate gpio > phandle. I looked at this table for the P9 header: > https://elinux.org/File:H9Pinout.PNG > > I believe that gpio1[16] corresponds to P9.15 which is LCD dc pin, and > gpio1[28] corresponds to P9.12 which is LCD reset pin. > > My understanding of those mappings may be incorrect, so I'd appreciate > any additional feedback. > > Thanks, > Drew > -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/1e4642a8-d6e7-1990-4f6c-a37103f35ae9%40gmail.com. For more options, visit https://groups.google.com/d/optout.
