From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751811AbdH2Tum (ORCPT ); Tue, 29 Aug 2017 15:50:42 -0400 Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.216]:10648 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751377AbdH2Tuk (ORCPT ); Tue, 29 Aug 2017 15:50:40 -0400 X-RZG-AUTH: :JGIXVUS7cutRB/49FwqZ7WcecEarQROEYabkiUo6mSAGQ+qKID81PEGXJZ8= X-RZG-CLASS-ID: mo00 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) Subject: Re: dt-bindings: power: supply: bq27xxx: Add monitored-battery documentation From: "H. Nikolaus Schaller" In-Reply-To: Date: Tue, 29 Aug 2017 21:50:30 +0200 Cc: Sebastian Reichel , LKML , Discussions about the Letux Kernel , kernel@pyra-handheld.com Message-Id: References: <38AF5486-7D86-4D98-AD74-AB2FFC81E8D0@goldelico.com> To: Liam Breck X-Mailer: Apple Mail (2.3124) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by nfs id v7TJomU1011746 Hi Liam, > Am 29.08.2017 um 20:18 schrieb Liam Breck : > > Hi Nikolaus, thanks for the testing report... > > On Tue, Aug 29, 2017 at 7:24 AM, H. Nikolaus Schaller wrote: >> Hi Liam, >> seems to work as expected :) >> >> First boot: >> >> [ 6.096336] bq27xxx_battery_settings >> [ 6.097987] bq27xxx_battery_set_config >> [ 6.097990] bq27xxx_battery_unseal >> [ 6.107987] bq27xxx-battery 1-0055: update design-capacity to 6000 >> [ 6.107992] bq27xxx-battery 1-0055: update design-energy to 22200 >> [ 6.107997] bq27xxx-battery 1-0055: terminate-voltage has 3200 >> [ 6.382048] bq27xxx-battery 1-0055: cfgupdate 0, retries 7 >> [ 6.382054] bq27xxx_battery_seal >> >> Second boot (w/o removing battery in between): >> >> [ 6.008883] bq27xxx_battery_settings >> [ 6.013280] bq27xxx_battery_set_config >> [ 6.018761] bq27xxx_battery_unseal >> [ 6.050694] bq27xxx-battery 1-0055: design-capacity has 6000 >> [ 6.059913] bq27xxx-battery 1-0055: design-energy has 22200 >> [ 6.067113] bq27xxx-battery 1-0055: terminate-voltage has 3200 >> [ 6.075803] bq27xxx_battery_seal > > I'd be interested to hear what happens after poweroff & boot (ie does > it retain config)? second boot was simple poweroff + reboot and it changes from "update design-capacity" to "design-capacity has" which IMHO means that the bq27421 did retain settings and was therefore not reprogrammed. > > >> Third boot (with removing battery in between): >> >> [ 6.161085] bq27xxx_battery_settings >> [ 6.161162] bq27xxx_battery_set_config >> [ 6.161165] bq27xxx_battery_unseal >> [ 6.177904] bq27xxx-battery 1-0055: update design-capacity to 6000 >> [ 6.177909] bq27xxx-battery 1-0055: update design-energy to 22200 >> [ 6.177914] bq27xxx-battery 1-0055: terminate-voltage has 3200 >> [ 6.440592] bq27xxx-battery 1-0055: cfgupdate 0, retries 7 >> [ 6.440597] bq27xxx_battery_seal this was with removing all power which makes the bq27421 loosing the settings. And next reboot does another "update design-capacity". >> >> (I have added some printk to trace seal/unseal etc.) >> >> Values match the 6000mAh specified by DT: >> >> bat: battery { >> compatible = "simple-battery", "pyra-battery"; >> voltage-min-design-microvolt = <3200000>; >> energy-full-design-microwatt-hours = <22200000>; >> charge-full-design-microamp-hours = <6000000>; >> }; >> >> root@letux:~# cat /sys/class/power_supply/bq27421-0/uevent >> POWER_SUPPLY_NAME=bq27421-0 >> POWER_SUPPLY_STATUS=Discharging >> POWER_SUPPLY_PRESENT=1 >> POWER_SUPPLY_VOLTAGE_NOW=3943000 >> POWER_SUPPLY_CURRENT_NOW=-634000 >> POWER_SUPPLY_CAPACITY=82 >> POWER_SUPPLY_CAPACITY_LEVEL=Normal >> POWER_SUPPLY_TEMP=319 >> POWER_SUPPLY_TECHNOLOGY=Li-ion >> POWER_SUPPLY_CHARGE_FULL=5467000 >> POWER_SUPPLY_CHARGE_NOW=4611000 >> POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000 >> POWER_SUPPLY_MANUFACTURER=Texas Instruments >> root@letux:~# >> >> Anything else I should test? > > Could you also test voltage-min-design-microvolt at 3177 to make sure > that's configurable too? Yes: bat: battery { compatible = "simple-battery", "pyra-battery"; voltage-min-design-microvolt = <3177000>; energy-full-design-microwatt-hours = <22200000>; charge-full-design-microamp-hours = <6000000>; }; gives [ 6.241009] bq27xxx_battery_settings [ 6.241055] bq27xxx_battery_set_config [ 6.241058] bq27xxx_battery_unseal [ 6.257073] bq27xxx-battery 1-0055: update design-capacity to 6000 [ 6.257078] bq27xxx-battery 1-0055: update design-energy to 22200 [ 6.257084] bq27xxx-battery 1-0055: update terminate-voltage to 3177 [ 6.379230] bq27xxx_battery_seal So it looks good. > Sebastian just queued my series to -next. Would you be inclined to > submit a new patch enabling bq27421? If so, the sooner the better > since merge window is imminent :-) I already have a patch for that... BR and thanks, Nikolaus > > Liam > > >> >> >>> Am 29.08.2017 um 12:40 schrieb Liam Breck : >>> >>> Hi Nikolaus, >>> >>> You need the patchset which enables this feature, which was delayed >>> for further work. It's now ready... >>> >>> https://patchwork.kernel.org/patch/9918947/ >>> https://patchwork.kernel.org/patch/9918949/ >>> https://patchwork.kernel.org/patch/9918951/ >>> https://patchwork.kernel.org/patch/9918953/ >>> https://patchwork.kernel.org/patch/9918955/ >>> >>> And flip the #if 0 protecting bq27421_dm_regs >>> >>> I'd love to support that chip in this patchset if you can test >>> non-default settings for all 3 options this week? >>> >>> Thanks, >>> Liam >>> >>> >>> On Tue, Aug 29, 2017 at 2:43 AM, H. Nikolaus Schaller wrote: >>>> Hi, >>>> I am trying to get this working on our bq27421. >>>> >>>> But the only message I get is: >>>> >>>> [ 6.086407] bq27xxx-battery 1-0055: data memory update not supported for chip >>>> >>>> A little research shows that this message comes from >>>> >>>> http://elixir.free-electrons.com/linux/v4.13-rc7/source/drivers/power/supply/bq27xxx_battery.c#L1279 >>>> >>>> So di->dm_regs is NULL. >>>> >>>> But doing an fgrep for dm_regs shows no line of code where the pointer is set to a non-null value: >>>> >>>> master hns$ fgrep -R dm_regs * >>>> drivers/power/supply/bq27xxx_battery.c: .class = (di)->dm_regs[i].subclass_id, \ >>>> drivers/power/supply/bq27xxx_battery.c: .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \ >>>> drivers/power/supply/bq27xxx_battery.c: struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id]; >>>> drivers/power/supply/bq27xxx_battery.c: if (!di->dm_regs) { >>>> drivers/power/supply/bq27xxx_battery.c: max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max; >>>> drivers/power/supply/bq27xxx_battery.c: max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max; >>>> drivers/power/supply/bq27xxx_battery.c: min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min; >>>> drivers/power/supply/bq27xxx_battery.c: max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max; >>>> Binary file drivers/power/supply/bq27xxx_battery.ko matches >>>> Binary file drivers/power/supply/bq27xxx_battery.o matches >>>> Binary file drivers/power/supply/bq27xxx_battery_i2c.ko matches >>>> Binary file drivers/power/supply/bq27xxx_battery_i2c.o matches >>>> include/linux/power/bq27xxx_battery.h: struct bq27xxx_dm_reg *dm_regs; >>>> master hns$ >>>> >>>> What am I doing wrong here? >>>> >>>> BR and thanks, >>>> Nikolaus >>>> >>