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(2001-1c00-0c1e-bf00-1054-9d19-e0f0-8214.cable.dynamic.v6.ziggo.nl. [2001:1c00:c1e:bf00:1054:9d19:e0f0:8214]) by smtp.gmail.com with ESMTPSA id m22sm6649409eda.97.2021.11.16.03.05.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 16 Nov 2021 03:05:03 -0800 (PST) Message-ID: <684c11bc-3703-1de9-3073-96701405cd2c@redhat.com> Date: Tue, 16 Nov 2021 12:05:02 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [PATCH v2 00/20] power-suppy/i2c/extcon: Fix charger setup on Xiaomi Mi Pad 2 and Lenovo Yogabook Content-Language: en-US To: Andy Shevchenko Cc: "Rafael J . Wysocki" , Mika Westerberg , Mark Gross , Andy Shevchenko , Wolfram Sang , Sebastian Reichel , MyungJoo Ham , Chanwoo Choi , Ard Biesheuvel , Len Brown , ACPI Devel Maling List , Yauhen Kharuzhy , Tsuchiya Yuto , Platform Driver , linux-i2c , Linux PM , Linux Kernel Mailing List , linux-efi References: <20211114170335.66994-1-hdegoede@redhat.com> From: Hans de Goede In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 11/16/21 12:00, Andy Shevchenko wrote: > On Sun, Nov 14, 2021 at 7:03 PM Hans de Goede wrote: >> >> Hi All, >> >> This is version 2 of my series previously titled: >> "[PATCH 00/13] power-suppy/i2c/extcon: Add support for cht-wc PMIC >> without USB-PD support". >> >> So far almost all the kernel code surrounding the Cherry Trail Whiskey Cove >> PMIC has been developed on the GPD win / pocket devices and it has various >> assumption based on that. In the mean time I've learned (and gotten access >> to) about 2 more designs and none of the 3 now known designs use a single >> standard setup for the charger, fuel-gauge and other chips surrounding the >> PMIC / charging+data USB port: >> >> 1. The GPD Win and GPD Pocket mini-laptops, these are really 2 models >> but the Pocket re-uses the GPD Win's design in a different housing: >> >> The WC PMIC is connected to a TI BQ24292i charger, paired with >> a Maxim MAX17047 fuelgauge + a FUSB302 USB Type-C Controller + >> a PI3USB30532 USB switch, for a fully functional Type-C port. >> >> 2. The Xiaomi Mi Pad 2: >> >> The WC PMIC is connected to a TI BQ25890 charger, paired with >> a TI BQ27520 fuelgauge, using the TI BQ25890 for BC1.2 charger type >> detection, for a USB-2 only Type-C port without PD. >> >> 3. The Lenovo Yoga Book YB1-X90 / Lenovo Yoga Book YB1-X91 series: >> >> The WC PMIC is connected to a TI BQ25892 charger, paired with >> a TI BQ27542 fuelgauge, using the WC PMIC for BC1.2 charger type >> detection and using the BQ25892's Mediatek Pump Express+ (1.0) >> >> ### >> >> Unlike what is normal on X86 this diversity in designs is not handled / >> abstracted away by the ACPI tables. > > I will briefly look into it, right now two observations (or nit-picks): Thank you. > - you may utilize Co-developed-by tag when it makes sense Right, I intended to do so in patch 13/20, but I now see that I somehow forgot that :) > - I would rather see "x86/ACPI" in all texts (note small "x") Ack. Regards, Hans