[PATCH] ARM: dts: am335x-boneblack: add i2c1 DT entry

Thanks Robert!

-----Original Message-----
From: Robert Nelson [mailto:robertcnelson at gmail.com] 
Sent: Wednesday, June 8, 2016 1:15 AM
To: Li, Yong B <redacted>
Cc: Tony Lindgren <tony@atomide.com>; Benoit Cousson <redacted>; Rob Herring <robh+dt@kernel.org>; Pawel Moll <redacted>; Mark Rutland <mark.rutland@arm.com>; Ian Campbell <redacted>; Kumar Gala <redacted>; Russell King <redacted>; linux-omap at vger.kernel.org; devicetree <redacted>; linux-arm-kernel at lists.infradead.org; linux kernel <redacted>; sdliyong at gmail.com; Pantelis Antoniou <redacted>
Subject: Re: [PATCH] ARM: dts: am335x-boneblack: add i2c1 DT entry

On Tue, Jun 7, 2016 at 1:14 AM, Li, Yong B [off-list ref] wrote:

Thanks Tony.

I checked the DTS/overlays using linux-yocto-4.1 kernel(Ostro OS). It seems to me that the kernel/u-boot do not include the latest overlay support patch. And I also tested the latest Debian 8.4 using BBB boards, the I2C1 does not work too. This patch is the simplest solution for I2C1/I2C2 in linux-yocto-4.1.

ps, your patch is also broken, you didn't even mux the pins, so i2c1 doesn't work for you anyways. ;)

pinctrl-0 = <&i2c2_pins>; -> pinctrl-0 = <&i2c1_pins>;

Option 1:

With the latest BBB image's, we utilize "cape_universal", thus you can enable I2C1 via:

root at beaglebone:~# config-pin -l P9.17
default gpio gpio_pu gpio_pd spi i2c pwm

root at beaglebone:~# config-pin -l P9.18
default gpio gpio_pu gpio_pd spi i2c pwm

root at beaglebone:~# config-pin P9.17 i2c

root at beaglebone:~# config-pin P9.18 i2c

Option 2, for the BB-I2C1 overlay:

add

cape_enable=bone_capemgr.enable_partno=BB-I2C1

Option 3, wait for Pantelis's solution... ;)

http://comments.gmane.org/gmane.linux.kernel/2234662

Regards,

--
Robert Nelson
https://rcn-ee.com/