From patchwork Mon May 11 14:05:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamel BOUHARA X-Patchwork-Id: 207835 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97A29C54E98 for ; Mon, 11 May 2020 14:05:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8121720736 for ; Mon, 11 May 2020 14:05:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730348AbgEKOFd (ORCPT ); Mon, 11 May 2020 10:05:33 -0400 Received: from relay7-d.mail.gandi.net ([217.70.183.200]:54057 "EHLO relay7-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730359AbgEKOFd (ORCPT ); Mon, 11 May 2020 10:05:33 -0400 X-Originating-IP: 78.193.40.249 Received: from localhost (unknown [78.193.40.249]) (Authenticated sender: kamel.bouhara@bootlin.com) by relay7-d.mail.gandi.net (Postfix) with ESMTPSA id CC2522000F; Mon, 11 May 2020 14:05:29 +0000 (UTC) From: Kamel Bouhara To: William Breathitt Gray , Rob Herring , Mark Rutland , Nicolas Ferre , Alexandre Belloni , Ludovic Desroches , linux-arm-kernel@lists.infradead.org Cc: Thomas Petazzoni , linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, Kamel Bouhara Subject: [PATCH v4 4/5] dt-bindings: counter: microchip-tcb-capture counter Date: Mon, 11 May 2020 16:05:04 +0200 Message-Id: <20200511140505.1649111-5-kamel.bouhara@bootlin.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200511140505.1649111-1-kamel.bouhara@bootlin.com> References: <20200511140505.1649111-1-kamel.bouhara@bootlin.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Describe the devicetree binding for the Microchip TCB module. Each counter blocks exposes three independent counters. However, when configured in quadrature decoder, both channel <0> and <1> are required for speed/position and rotation capture (yet only the position is captured). Signed-off-by: Kamel Bouhara --- .../soc/microchip/atmel,at91rm9200-tcb.yaml | 29 +++++++++++++++++-- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml index 38403760f64d..0bd7b14a1552 100644 --- a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml +++ b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml @@ -52,14 +52,20 @@ properties: patternProperties: "^timer@[0-2]$": - description: The timer block channels that are used as timers. + description: The timer block channels that are used as timers or counters. type: object properties: compatible: - const: atmel,tcb-timer + items: + - enum: + - atmel,tcb-timer + - microchip,tcb-capture reg: description: - List of channels to use for this particular timer. + List of channels to use for this particular timer. In Microchip TCB capture + mode channels are registered as a counter devices, for the qdec mode TCB0's + channel <0> and <1> are required. + minItems: 1 maxItems: 3 @@ -148,3 +154,20 @@ examples: reg = <1>; }; }; +examples: + - | + /* TCB Capture with qdec mode: */ + tcb0: timer@fff7c000 { + compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0xfff7c000 0x100>; + interrupts = <18 4>; + clocks = <&tcb0_clk>, <&clk32k>; + clock-names = "t0_clk", "slow_clk"; + + timer@0 { + compatible = "atmel,tcb-capture"; + reg = <0>, <1>; + }; + };