Am Freitag, 7. August 2015, 15:13:13 schrieb Dmitry Torokhov: > On Fri, Aug 7, 2015 at 3:06 PM, Doug Anderson <dianders at chromium.org> wrote: > > Heiko, > > > > On Thu, Aug 6, 2015 at 10:37 AM, Heiko St?bner <heiko at sntech.de> wrote: > >> +&i2c3 { > >> + status = "okay"; > >> + > >> + /* > >> + * Touchscreen pin control is shared between Atmel and Elan > >> devices, + * so we have to pull it up to the bus level. > >> + */ > >> + pinctrl-names = "default"; > >> + pinctrl-0 = <&i2c3_xfer &touch_int &touch_rst>; > >> + > >> + clock-frequency = <400000>; > >> + i2c-scl-falling-time-ns = <50>; > >> + i2c-scl-rising-time-ns = <300>; > >> + > >> + touchscreen at 10 { > >> + compatible = "elan,ekth3500"; > >> + reg = <0x10>; > >> + interrupt-parent = <&gpio2>; > >> + interrupts = <14 IRQ_TYPE_EDGE_FALLING>; > >> + reset-gpios = <&gpio2 15 GPIO_ACTIVE_LOW>; > >> + vcc33-supply = <&vcc33_touch>; > >> + vccio-supply = <&vcc33_touch>; > >> + }; > >> + > >> + touchscreen at 4a { > >> + compatible = "atmel,atmel_mxt_ts"; > >> + reg = <0x4a>; > >> + atmel,reset-gpios = <&gpio2 15 GPIO_ACTIVE_LOW>; > >> + avdd-supply = <&vcc5v_touch>; > >> + interrupt-parent = <&gpio2>; > >> + interrupts = <14 IRQ_TYPE_EDGE_FALLING>; > >> + vdd-supply = <&vcc33_touch>; > > > > Technically I don't think most of these properties exist upstream, but > > Dmitry (now CCed) might know more. > > > > ...actually similar for elan. At least I don't see 'reset-gpios', nor > > 'vcc33-supply' and 'vccio-supply' in the bindings when I checkout > > linuxnext... > > I just merged the Elan regulator/gpio support, it will show up in the next > next. > > Oh, and also locally our tree has hacks in it to handle the fact that > > both atmel and elan will try to grab the same reset GPIO. I'm nearly > > certain that Dmitry said that the current hacks we have wouldn't be > > appropriate for upstream. I had some proposals for better solutions, > > but they were slightly more controversial. In any case, I think all > > shipping devices ended up using one or the other of these two > > touchscreens (I forget which), so you could probably simplify and just > > pick one of them. If old prototype devices don't work upstream it > > wouldn't be the end of the world. > > I think if you pick Elan for this board it will cover majority (all?) > devices that actually shipped. I guess I'll simply drop the touchscreens for for this initial submission - at this point in time we don't have support for the internal display anyway, so I can sort out the touchscreens a bit later. armsoc has a slightly early cutoff most of the time, so I'll try to land the initial support and worry about the smaller tidbits later :-) Heiko