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Bug#892786: linux,arm64: please enable modules needed for teres-i OSHW laptop

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  Bug#892786: linux,arm64: please enable modules needed for teres-i OSHW laptop Harald Geyer <harald@ccbib.org> - 2018-03-12 22:20 +0100
    Bug#892786: linux,arm64: please enable modules needed for teres-i OSHW laptop Uwe Kleine-König <u.kleine-koenig@pengutronix.de> - 2018-03-13 15:10 +0100
    Processed: Re: Bug#892786: linux,arm64: please enable modules  needed for teres-i OSHW laptop "Debian Bug Tracking System" <owner@bugs.debian.org> - 2018-03-13 15:10 +0100

#60461 — Bug#892786: linux,arm64: please enable modules needed for teres-i OSHW laptop

Source: linux
Version: 4.15.4-1
Severity: wishlist

Hi,

I have the TERES I open hardware laptop from olimex
https://www.olimex.com/Products/DIY-Laptop/
running with buster, but I had to recompile the kernel to get all
the modules necessary to have a useable system.

Mainlineing the devicetree file for the teres is work in progress,
(see: https://lkml.org/lkml/2018/3/12/653 ) but most of the missing
bit's in the kernel config are needed for all Allwinner A64 based
boards anyway - many of which already have upstream support.

Please enable the following configuration symbols for arm64 builds:

1) Relevant to all A64 based systems and other SoCs using the AXP803
PMIC:
at least:
CONFIG_MFD_AXP20X=y
CONFIG_MFD_AXP20X_RSB=y
CONFIG_REGULATOR_AXP20X=m
CONFIG_INPUT_AXP20X_PEK=m

(note about builtin vs. module: This is the combination I tested. It should
be possible to have everything as modules so long as mkinitramfs puts
them into the initrd. In theory we also need the regulator module in the
initrd to power up the supply chain of the MMC hosts. In practice MMCs
are already powered up by the boot loader, but we need at least the mfd
part of the pmic driver, to get the kernel probing the devices.

You might want to draw the line between builtin and module drivers in a
saner way. I can test your configuration, once you have made up your mind.)

probably also (untested yet, but will be demanded in the future obviously):
CONFIG_PINCTRL_AXP209=m
CONFIG_CHARGER_AXP20X=m
CONFIG_BATTERY_AXP20X=m
CONFIG_AXP20X_POWER=m
CONFIG_AXP288_FUEL_GAUGE=m
CONFIG_AXP20X_ADC=m
CONFIG_AXP288_ADC=m

2) Relevant to A64 based systems, driver available since long and likely
going to be enabled by default in upstream devicetrees starting with 4.17:
CONFIG_SUNXI_WATCHDOG=m

3) Relevant at least to A64 based systems with backlight. Probably at the
moment only the teres-i laptop:
CONFIG_PWM_SUN4I=m
CONFIG_BACKLIGHT_PWM=m

4) Maybe not relevant at the moment, but might be a sane default to include
anyway:
CONFIG_LEDS_PWM=m


BTW, as you might have inferred from my message, I'm a bit unsure how
you decide which drivers to enable. Do you have a script, that scan's the
device trees for required drivers (if so it clearly failed to find the
drivers listed in (1)), or do you rely solely on users speaking up when
something is missing? Any hints on how to efficiently report missing
drivers or upcoming upstream changes would be appreciated.


Thanks for your consideration,
Harald

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#60462

Control: tag 892786 + pending

On Mon, Mar 12, 2018 at 10:06:37PM +0100, Harald Geyer wrote:
> Please enable the following configuration symbols for arm64 builds:
> 
> 1) Relevant to all A64 based systems and other SoCs using the AXP803
> PMIC:
> at least:
> CONFIG_MFD_AXP20X=y
> CONFIG_MFD_AXP20X_RSB=y
> CONFIG_REGULATOR_AXP20X=m
> CONFIG_INPUT_AXP20X_PEK=m
> 
> (note about builtin vs. module: This is the combination I tested. It should
> be possible to have everything as modules so long as mkinitramfs puts
> them into the initrd. In theory we also need the regulator module in the
> initrd to power up the supply chain of the MMC hosts. In practice MMCs
> are already powered up by the boot loader, but we need at least the mfd
> part of the pmic driver, to get the kernel probing the devices.
> 
> You might want to draw the line between builtin and module drivers in a
> saner way. I can test your configuration, once you have made up your mind.)
> 
> probably also (untested yet, but will be demanded in the future obviously):
> CONFIG_PINCTRL_AXP209=m
> CONFIG_CHARGER_AXP20X=m
> CONFIG_BATTERY_AXP20X=m
> CONFIG_AXP20X_POWER=m
> CONFIG_AXP288_FUEL_GAUGE=m
> CONFIG_AXP20X_ADC=m
> CONFIG_AXP288_ADC=m
> 
> 2) Relevant to A64 based systems, driver available since long and likely
> going to be enabled by default in upstream devicetrees starting with 4.17:
> CONFIG_SUNXI_WATCHDOG=m
> 
> 3) Relevant at least to A64 based systems with backlight. Probably at the
> moment only the teres-i laptop:
> CONFIG_PWM_SUN4I=m
> CONFIG_BACKLIGHT_PWM=m
> 
> 4) Maybe not relevant at the moment, but might be a sane default to include
> anyway:
> CONFIG_LEDS_PWM=m

I enabled them all as modules, see https://deb.li/RhEe.

> BTW, as you might have inferred from my message, I'm a bit unsure how
> you decide which drivers to enable. Do you have a script, that scan's the
> device trees for required drivers (if so it clearly failed to find the
> drivers listed in (1)), or do you rely solely on users speaking up when
> something is missing? Any hints on how to efficiently report missing
> drivers or upcoming upstream changes would be appreciated.

I think we rely on people reporting problems. Reporting a bug as you did
is fine, if you're lucky comming into the irc channel #debian-kernel and
mentioning there what you need to have enabled might be good enough,
too.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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#60463 — Processed: Re: Bug#892786: linux,arm64: please enable modules needed for teres-i OSHW laptop

Processing control commands:

> tag 892786 + pending
Bug #892786 [src:linux] linux,arm64: please enable modules needed for teres-i OSHW laptop
Added tag(s) pending.

-- 
892786: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=892786
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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