From patchwork Mon Nov 19 10:25:27 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philippe Schenker X-Patchwork-Id: 10688477 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9B23E13BF for ; Mon, 19 Nov 2018 10:46:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8C25229A41 for ; Mon, 19 Nov 2018 10:46:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7E3D329A64; Mon, 19 Nov 2018 10:46:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D3BE429A41 for ; Mon, 19 Nov 2018 10:46:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727840AbeKSVJ1 (ORCPT ); Mon, 19 Nov 2018 16:09:27 -0500 Received: from mxout014.mail.hostpoint.ch ([217.26.49.174]:37341 "EHLO mxout014.mail.hostpoint.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727728AbeKSVJ1 (ORCPT ); Mon, 19 Nov 2018 16:09:27 -0500 Received: from [10.0.2.46] (helo=asmtp013.mail.hostpoint.ch) by mxout014.mail.hostpoint.ch with esmtp (Exim 4.91 (FreeBSD)) (envelope-from ) id 1gOgkb-000BpI-An; Mon, 19 Nov 2018 11:25:53 +0100 Received: from [46.140.72.82] (helo=philippe-pc.toradex.int) by asmtp013.mail.hostpoint.ch with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91 (FreeBSD)) (envelope-from ) id 1gOgkb-0007f0-5I; Mon, 19 Nov 2018 11:25:53 +0100 X-Authenticated-Sender-Id: dev@pschenker.ch From: Philippe Schenker To: jic23@kernel.org, marcel.ziswiler@toradex.com, stefan@agner.ch Cc: Max Krummenacher , Philippe Schenker , devicetree@vger.kernel.org, linux-iio@vger.kernel.org, Hartmut Knaack , Alexandre Torgue , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Rob Herring , Dmitry Torokhov , Lee Jones , Maxime Coquelin , Mark Rutland , Peter Meerwald-Stadler , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, Lars-Peter Clausen Subject: [PATCH v2 3/4] iio: adc: add STMPE ADC devicetree bindings Date: Mon, 19 Nov 2018 11:25:27 +0100 Message-Id: <20181119102528.2830-3-dev@pschenker.ch> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181119102528.2830-1-dev@pschenker.ch> References: <20181119102528.2830-1-dev@pschenker.ch> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Stefan Agner This adds the devicetree bindings for the STMPE ADC. Signed-off-by: Stefan Agner Signed-off-by: Max Krummenacher Signed-off-by: Philippe Schenker --- Changes in v2: - Moved the bindings for ADC to the overlying mfd. - Reformatted for better readability .../devicetree/bindings/iio/adc/stmpe-adc.txt | 21 ++++++++++++++ .../bindings/input/touchscreen/stmpe.txt | 11 -------- .../devicetree/bindings/mfd/stmpe.txt | 28 ++++++++++++++----- 3 files changed, 42 insertions(+), 18 deletions(-) create mode 100644 Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt diff --git a/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt b/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt new file mode 100644 index 000000000000..480e66422625 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt @@ -0,0 +1,21 @@ +STMPE ADC driver +---------------- + +Required properties: + - compatible: "st,stmpe-adc" + +Optional properties: +Note that the ADC is shared with the STMPE touchscreen. ADC related settings +have to be done in the mfd. +- st,norequest-mask: bitmask specifying which ADC channels should _not_ be + requestable due to different usage (e.g. touch) + +Node name must be stmpe_adc and should be child node of stmpe node to +which it belongs. + +Example: + + stmpe_adc { + compatible = "st,stmpe-adc"; + st,norequest-mask = <0x0F>; /* dont use ADC CH3-0 */ + }; diff --git a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt index 127baa31a77a..71e1359749f2 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt +++ b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt @@ -5,13 +5,6 @@ Required properties: - compatible: "st,stmpe-ts" Optional properties: -- st,sample-time: ADC converstion time in number of clock. (0 -> 36 clocks, 1 -> - 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks, 4 -> 80 clocks, 5 -> 96 clocks, 6 - -> 144 clocks), recommended is 4. -- st,mod-12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC) -- st,ref-sel: ADC reference source (0 -> internal reference, 1 -> external - reference) -- st,adc-freq: ADC Clock speed (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz) - st,ave-ctrl: Sample average control (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples) - st,touch-det-delay: Touch detect interrupt delay (0 -> 10 us, 1 -> 50 us, 2 -> @@ -31,10 +24,6 @@ Example: stmpe_touchscreen { compatible = "st,stmpe-ts"; - st,sample-time = <4>; - st,mod-12b = <1>; - st,ref-sel = <0>; - st,adc-freq = <1>; st,ave-ctrl = <1>; st,touch-det-delay = <2>; st,settling = <2>; diff --git a/Documentation/devicetree/bindings/mfd/stmpe.txt b/Documentation/devicetree/bindings/mfd/stmpe.txt index c797c05cd3c2..bd991514d6c1 100644 --- a/Documentation/devicetree/bindings/mfd/stmpe.txt +++ b/Documentation/devicetree/bindings/mfd/stmpe.txt @@ -4,15 +4,29 @@ STMPE is an MFD device which may expose the following inbuilt devices: gpio, keypad, touchscreen, adc, pwm, rotator. Required properties: - - compatible : "st,stmpe[610|801|811|1600|1601|2401|2403]" - - reg : I2C/SPI address of the device + - compatible : "st,stmpe[610|801|811|1600|1601|2401|2403]" + - reg : I2C/SPI address of the device Optional properties: - - interrupts : The interrupt outputs from the controller - - interrupt-controller : Marks the device node as an interrupt controller - - wakeup-source : Marks the input device as wakable - - st,autosleep-timeout : Valid entries (ms); 4, 16, 32, 64, 128, 256, 512 and 1024 - - irq-gpio : If present, which GPIO to use for event IRQ + - interrupts : The interrupt outputs from the controller + - interrupt-controller : Marks the device node as an interrupt controller + - wakeup-source : Marks the input device as wakable + - st,autosleep-timeout : Valid entries (ms); 4, 16, 32, 64, 128, 256, 512 and 1024 + - irq-gpio : If present, which GPIO to use for event IRQ + +Optional properties for devices with touch and ADC (STMPE811|STMPE610): + - st,sample-time : ADC conversion time in number of clock. + 0 -> 36 clocks 4 -> 80 clocks (recommended) + 1 -> 44 clocks 5 -> 96 clocks + 2 -> 56 clocks 6 -> 144 clocks + 3 -> 64 clocks + - st,mod-12b : ADC Bit mode + 0 -> 10bit ADC 1 -> 12bit ADC + - st,ref-sel : ADC reference source + 0 -> internal 1 -> external + - st,adc-freq : ADC Clock speed + 0 -> 1.625 MHz 2 || 3 -> 6.5 MHz + 1 -> 3.25 MHz Example: