Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756151AbbKDAi6 (ORCPT ); Tue, 3 Nov 2015 19:38:58 -0500 Received: from us-mx2.synaptics.com ([192.147.44.131]:16137 "EHLO us-mx1.synaptics.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755004AbbKDAi4 (ORCPT ); Tue, 3 Nov 2015 19:38:56 -0500 X-PGP-Universal: processed; by securemail.synaptics.com on Tue, 03 Nov 2015 17:39:07 -0800 Subject: Re: [PATCH 00/11] Input: synaptics-rmi4: various fixes for the existing rmi4 branch To: Linus Walleij References: <1435087050-11444-1-git-send-email-benjamin.tissoires@redhat.com> <20150723171041.GA14941@mail.corp.redhat.com> <5637E03B.5010804@synaptics.com> CC: Benjamin Tissoires , Dmitry Torokhov , Christopher Heiny , Stephen Chandler Paul , Linux Input , "linux-kernel@vger.kernel.org" From: Andrew Duggan Message-ID: <5639539F.2050406@synaptics.com> Date: Tue, 3 Nov 2015 16:38:55 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.4.10.145] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3879 Lines: 103 On 11/03/2015 06:01 AM, Linus Walleij wrote: > On Mon, Nov 2, 2015 at 11:14 PM, Andrew Duggan wrote: > >> I have been continuing to work on the synaptics-rmi4 driver and was just >> trying to figure out what the next step should be. I recently uploaded my >> changes here https://github.com/aduggan/linux. > I just tested this patch set on the Ux500 with a TVK UI board. > > I added this: > > i2c@80110000 { > synaptics@4b { > /* Synaptics RMI4 TM1217 touchscreen */ > compatible = "syna,rmi-i2c"; > #address-cells = <1>; > #size-cells = <0>; > reg = <0x4b>; > pinctrl-names = "default"; > pinctrl-0 = <&synaptics_tvk_mode>; > interrupt-parent = <&gpio2>; > interrupts = <20 IRQ_TYPE_EDGE_FALLING>; > syna,sensor-name="TM1217"; > > rmi-f01@1 { > reg = <0x1>; > syna,nosleep = <1>; > }; > rmi-f11@11 { > reg = <0x11>; > syna,f11-flip-x = <1>; > syna,sensor-type = <1>; > }; > }; > }; > > Bootlog: > [ 2.143127] rmi_f01 sensor00.fn01: found RMI device, manufacturer: > Synaptics, product: TM1217 > [ 2.155242] input: Synaptics RMI4 Touch Sensor as > /devices/sensor00/input/input2 > [ 2.165466] rmi_i2c 3-004b: registered rmi i2c driver at 0x4b. > > Doing cat /dev/input/event2 gives noise on screen, yay. > > Some quick questions I see immediately: > > - The DT examples in Documentation/devicetree/bindings/input/* > omit > #address-cells = <1>; > #size-cells = <0>; > for the I2C device children (i.e. the function nodes), it needs to look > like my example above to work. The devices which I have tested on haven't needed #address-cells or #size-cells. It looks like they are inheriting values defined at higher levels. I can add them to the example for completeness and update the documentation to say that they may be needed. > - All things boolean like syna,nosleep and syna,f11-flip-x > should just be like: > syna,nosleep; > syna,f11-flip-x; > in the device tree. Use of_property_read_bool() for these. That makes sense. I will switch them to booleans. > - syna,sensor-name = "FOO"; > Why? > The bootlog clearly states that f01 can autodetect the sensor > type. And f01 is always compiled in, right? So just cut this > binding and handling, if the two don't match it's just > super-confusing. The sensor name in the platform data is used by some debug messages before F01 is loaded. But, I agree it can be confusing having multiple names for the device. Especially, when the sensor name is the same as the product id. I'll see if it makes sense to use another name like the transport device's name in the logs. > - /proc/interrupts say this: > 206: 114 0 nmk2-64-95 20 Edge sensor00 > sensor00? Unhelpful. Why can't it say "TM1217", give take > an instance number, with the detected sensor name? Currently, rmi_dev's device name is also being set before F01 is loaded. I'll see if we can simply set it later when we have the product id from F01. > But to me the code seems overall pretty mature. It just works. > I'll be happy to give a more detailed review if you post it. Great! I'll look into the issues you highlighted above and start posting patches soon. Thanks for reviewing! Andrew > Yours, > Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/