Re: [Dev] Linux-4.4 boots on HiKey, and our upstreaming plan

On 02/04/2016 10:48 PM, Guodong Xu wrote:

On 4 February 2016 at 02:15, Grant Likely <grant.likely@linaro.org mailto:grant.likely@linaro.org> wrote:

On Wed, Feb 3, 2016 at 5:21 PM, Grant Likely <grant.likely@linaro.org <mailto:grant.likely@linaro.org>> wrote:
 > On Wed, Feb 3, 2016 at 2:52 PM, Guodong Xu <guodong.xu@linaro.org <mailto:guodong.xu@linaro.org>> wrote:
 >>
 >>
 >> On 3 February 2016 at 18:20, Grant Likely <grant.likely@linaro.org <mailto:grant.likely@linaro.org>> wrote:
 >>>
 >>> On Wed, Feb 3, 2016 at 7:52 AM, Guodong Xu <guodong.xu@linaro.org <mailto:guodong.xu@linaro.org>> wrote:
 >>> > Hi, all
 >>> >
 >>> >
 >>> > Here is a summary and status report about HiKey in vanilla linux and our
 >>> > upstreaming plan.
 >>> >
 >>> >
 >>> > As of v4.4, already upstreamed:
 >>> >
 >>> > - clk, psci, basic dts, uart, cpufreq, cpuidle, mailbox, emmc, wifi
 >>> > driver
 >>> > fix, and tsensor (thermal)
 >>> >
 >>> > - hikey can boot using vanilla v4.4 kernel and defconfig.
 >>> >
 >>> >
 >>> > Based on v4.4, topic branches are available, and integration branch is
 >>> > hosted here:
 >>> >
 >>> > - Git repo: https://github.com/96boards-hikey/linux
 >>> >
 >>> > - Integration branch: hikey-mainline-rebase
 >>> >
 >>> > - Topics (so features) include: dts, pmic, mmc, usb, adv7511, drm, pm,
 >>> > gpu,
 >>> > bluetooth, ion, hisi-reset, hikey-configs. (Most of these are backport
 >>> > of
 >>> > what we sent in maillist for community review.)
 >>>
 >>> Hi Guodong,
 >>>
 >>> Can you enable i2c0 and i2c1 in these builds please? They are needed
 >>> for working with mezzanine boards. I've attached an untested patch to
 >>> enable it in dts. I will try to test it later today, but I've got a
 >>> lot to deal with today, so it may take a few days.
 >>
 >>
 >> Updated. Thanks Grant for reminding me this.
 >>
 >> To git@github.com:96boards-hikey/linux.git
 >> -> hikey-mainline-rebase (forced update)
 >>
 >> Build command goes:
 >> make ARCH=arm64 defconfig;
 >> make ARCH=arm64 Image modules -j20;
 >> make ARCH=arm64 hisilicon/hi6220-hikey.dtb
 >>
 >> -Guodong
 >
 > Hi Guodong,
 >
 > Just tested, and that worked to create the i2c devices (but I had to
 > enable CONFIG_I2C_CHARDEV to get the userspace interface). However,
 > i2c bus 0 and 1 aren't working. i2cdetect appears to do the right
 > thing, but the i2c transaction isn't getting out to the external bus.
 > Is there some pin config that needs to be adjusted for HiKey for i2c?

I just checked. The 4.4 kernel does not enable the 1.8V voltage rail
on the LS expansion connector. Do you know how to enable it?

I found the root cause. There is a bug in regulator driver, which make enabling of ldo21 1.8V fail.

I fixed the issue, and together with CONFIG_I2C_CHARDEV enabled and other changes, I uploaded a new 'hikey-mainline-rebase' branch to https://github.com/96boards-hikey/linux

I2C should work for you. :)

Nice! :)

Another found is that the pre-builds bellow seem to stop at UEFI if trying to boot from SD card with linaro rootfs.

community review.)

• pre-builds are available too, if you just want to download and give it a try: https://builds.96boards.org/snapshots/hikey/community/hikey-mainline-rebase/

Would you mind checking it?

Akira

-Guodong

g.

---

Dev mailing list Dev@lists.96boards.org https://lists.96boards.org/mailman/listinfo/dev