нд, 30 лип. 2023 р. о 20:49 Andi Shyti <andi.shyti@xxxxxxxxxx> пише: > > Hi Svyatoslav, > > On Sat, Jul 29, 2023 at 07:08:55PM +0300, Svyatoslav Ryhel wrote: > > ASUS Transformers require this driver for proper work with their dock. > > Dock is controlled by EC and its presence is detected by a GPIO. > > > > The Transformers have a connector that's used for USB, charging or > > for attaching a keyboard (called a dock; it also has a battery and > > a touchpad). This connector probably (I don't have the means to verify > > that) has an I2C bus lines and a "detect" line (pulled low on the dock > > side) among the pins. I guess there is either no additional chip or > > a transparent bridge/buffer chip, but nothing that could be controlled > > by software. For DT this setup could be modelled like an I2C gate or > > a 2-port mux with enable joining two I2C buses (one "closer" to the > > CPU as a parent). > > > > In this case it's hard to tell the difference if this is real or virtual > > hardware. > > How did you test this device? > Using devices, which relay on this patch, here is a list of those: - ASUS Eee Pad Transformer TF101 (mainlined) - ASUS Transformer Prime TF201 (mainlined) - ASUS Transformer Pad TF300T/TF300TG/TF300TL (mainlined) - ASUS Transformer Infinity TF700T (mainlined) - ASUS VivoTab RT TF600T (WIP) - ASUS Transformer Pad TF701T (mainlined) Non ASUS device is Microsoft Surface RT Tested by many owners and users for more than a year iirc. > > This patchset is a predecessor of a possible larger patchset which > > should bring support for a asus-ec, an i2c mfd device programmed by > > Asus for their Transformers tablet line. Similar approach is used in > > Microsoft Surface RT for attachable Type Cover. > > Would be nice to have a driver using this support in the series, > otherwise it looks like thrown there without any use. Do you have > any use of it already? Even in your private repository just to > take a look. > Bindings which call gpio hotplug i2c bus: ASUS TF https://github.com/clamor-s/linux/commit/360f62f706670ab13101ef15b7f2bc8880da7a48 ASUS TF600T/TF701T https://github.com/clamor-s/linux/blob/transformer/arch/arm/boot/dts/tegra30-asus-tf600t.dts#L1050-L1089 Surface RT https://github.com/grate-driver/linux/blob/master/arch/arm/boot/dts/tegra30-microsoft-surface-rt.dts#L35-L53 > Thanks, > Andi
