From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Ripard Subject: Re: [PATCH v6 0/6] add support for AXP20X and AXP22X battery power supply driver Date: Fri, 21 Apr 2017 09:43:17 +0200 Message-ID: <20170421074317.rqk253sblxjaayzz@lukather> References: <20170418073421.31351-1-quentin.schulz@free-electrons.com> Reply-To: maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="xjq4nn73ddpedtbk" Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org Content-Disposition: inline In-Reply-To: <20170418073421.31351-1-quentin.schulz-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: Quentin Schulz Cc: sre-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, wens-jdAy2FN1RRM@public.gmane.org, linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org, linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, icenowy-ymACFijhrKM@public.gmane.org, liam-RYWXG+zxWwBdeoIcmNTgJF6hYfS7NtTn@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org --xjq4nn73ddpedtbk Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Apr 18, 2017 at 09:34:15AM +0200, Quentin Schulz wrote: > This is a series for AXP20X and AXP22X battery power supply without the > support for changing constant charge current from the DT. The patches for > supporting the constant charge current from DT are ready and will be sent > once the battery framework required to make this work has been merged. >=20 > v6: > - removed mention to fixed battery in DT-binding documentation, >=20 > Quote from v4 cover letter: >=20 > The X-Powers AXP20X and AXP22X PMICs have multiple ADCs. They expose > information and data of the various power supplies they support such as > ACIN, battery and VBUS. For example, they expose the current battery > voltage, charge or discharge, as well as ACIN and VBUS current voltages > and currents, internal PMIC temperature and ADC on 2 different GPIOs > when in the right mode (for the AXP209 only). >=20 > The ACIN power supply driver is added by this patch. The AXP20X and > AXP22X can both read the status and the "usability" of the power supply > but only the AXP209 will be able to tell the current current and voltage > of the power supply by reading ADC channels. It is simply not supported > by the AXP22X PMICs. >=20 > The battery power supply driver is also added by this patch. The AXP20X > and AXP22X share most of their behaviour but have slight variations. The > allowed target voltages for battery charging are not the same, the > AXP22X PMIC are able to tell if the battery percentage computed by the > PMIC is trustworthy and they have different formulas for computing max > current for battery power supply. The driver is able to give the current > voltage and current of the battery (be it charging or discharging), the > maximal and minimal voltage and maximal current allowed for the battery, > whether the battery is present and usable and its capacity. It will get > the battery current current and voltage by reading the ADC channels. The > PMIC allows maximal voltages (4.36V for AXP20X and 4.22V and 4.24V for > AXP22X) that should not be used with Lithium-based batteries and since > this PMIC is supposed to be used with Lithium-based batteries, they have > been disabled. The values returned by the ADC driver are multipled by > 1000 to scale from the mV returned by the ADC to the uV expected by the > power supply framework. >=20 > This series of patch adds DT bindings for ACIN power supply, ADC and > battery power supply drivers for AXP20X and AXP22X PMICs and their > documentation. It also enables the supported power supplies for the > Nextthing Co. CHIP and Sinlinx SinA33 boards. >=20 > The different drivers are also added to the MFD cells of the AXP20X and > AXP22X cells and the writeable and volatile regs updated to work with > the newly added drivers. >=20 > This series of patch is based on a previous upstreaming attempt done by > Bruno Pr=C3=A9mont few months ago. It differs in three points: the ADC > driver does not tell the battery temperature (TS_IN) as I do not have a > board to test it with, it does not tell the instantaneous battery power > as it returns crazy values for me and finally no support for OCV curves > for the battery. >=20 > You can test these patches from this repo and branch: > https://github.com/QSchulz/linux/tree/axp2xx_adc_batt_ac_v4 >=20 > v4: > - added the ability to set maximum constant charge current from sysfs, > - added a warning when setting a higher than current maximum constant ch= arge > current, > - set default to minimum possible value for current and maximum constant= charge > current when no battery DT is present or invalid battery DT, > - fixed a forgotten custom formula to compute maximum constant charge cu= rrent > for AXP22X, > - automatically lower the current constant charge current when it is hig= her > than the maximum constant charge current about to be set, >=20 > v3: > - Removed DT property for constant charge current in favor of the WIP > battery framework as requested by Sebastian Reichel, > - Using a simple if condition instead of a switch in the ADC driver, > - Fixed error handling in ADC driver's probe, > - Fixed missing call to iio_map_array_unregister in the ADC driver's > remove, > - Removed ADC driver's DT node and documentation, > - Merged IIO channel mapping patches into the original ADC driver > patch, > - Removed `adding V-OFF to writeable reg' patch as it's already in > writeable reg range, >=20 > v2: > - Some registers' name have been changed to better reflect their > purpose, > - Make VBUS power supply driver use IIO channels when AXP ADC driver is > enabled, but fall back on previous behavior when disabled. This is made > to avoid the ADC driver overwritting registers for VBUS power supply > ADC when removed, > - Removed useless adding of data registers to volatile registers, > - Reordered IIO channels, now grouped by same part of the PMIC (e.g. > voltage and current of the battery have the same index in different > IIO types), > - Added structures for specific data instead of matching on IDs, > - Switched from DT IIO channels mapping to iio_map structures IIO > channels mapping, >=20 > Quentin >=20 > Quentin Schulz (6): > dt-bindings: power: supply: add AXP20X/AXP22X battery DT binding > power: supply: add battery driver for AXP20X and AXP22X PMICs > ARM: dtsi: axp209: add battery power supply subnode > ARM: dtsi: axp22x: add battery power supply subnode > ARM: dts: sun8i: sina33: enable battery power supply subnode > ARM: sun5i: chip: enable battery power supply subnode Applied the last 4 patches. Maxime --=20 Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com --=20 You received this message because you are subscribed to the Google Groups "= linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to linux-sunxi+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit https://groups.google.com/d/optout. --xjq4nn73ddpedtbk Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIcBAABCAAGBQJY+bgUAAoJEBx+YmzsjxAgnmAQALYEqWtiPNKBGNjLL4HOtKZt xAVTCl6qIRq850NN08DDPOJu2hoXyxi5o+yjab9KJhx0cEW7ui26IQ2abgLtt1cM e+uqJL4XtqbW0LzTVAjnKvuNS+gukAlDeH2FMJXp0dbpzlEpDjswyLdubHHMueOn LxNT7Ocpm2EvXqFR7Im+jQDkm4JUD6BtChyGpZ9MfWmrLYz1v6X5AAeVNnbm1SDT UswgmO43ZSNv68/mVQoaMXoaOKnkiutXaCU1A96hIbwnjB2+szC5jSxEBCs8ro0Z uPytWnJFOirx8V/aekjgMw5VTKugSR9ZJlR0J1EHI5n6VdLCyAxc9q1sGRnMJE8+ HxZNFa+E+B8lvvi5H2XgakGiZKML+gX0DS6DIWYXfc7PkAzN4ib3h3ofVHhXTyEH HvxkR5Klx07hZoIkzzsTkK68kfkPWVyS+DisUTTrNlr/bHwOyUspVbAk/By43G// CHNMtVe4UMwx4FtgfS2MDf2yX9cA4EZNM3mjNzpswehSpB1cfQtANdbXS1eCKhxz LXxrTMxRZ+yP0a+llzmoLED++YzgZthUMsi/PcAV6jNolSBgjPg024lIPWix66jH N1lji7dh8OrpL99e7dc06T8+Z/hdHL6fuQtlR0ekB/1DsJyTBhJzfQh/ACUIOhMZ ma8bIvo/VVpsJfikw81X =Ea2Z -----END PGP SIGNATURE----- --xjq4nn73ddpedtbk--