From patchwork Mon Jul 6 11:43:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamel BOUHARA X-Patchwork-Id: 11645473 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 63D7013B6 for ; Mon, 6 Jul 2020 11:44:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 550E821531 for ; Mon, 6 Jul 2020 11:44:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729008AbgGFLoK (ORCPT ); Mon, 6 Jul 2020 07:44:10 -0400 Received: from relay6-d.mail.gandi.net ([217.70.183.198]:40573 "EHLO relay6-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728967AbgGFLoK (ORCPT ); Mon, 6 Jul 2020 07:44:10 -0400 X-Originating-IP: 86.202.118.225 Received: from localhost (lfbn-lyo-1-23-225.w86-202.abo.wanadoo.fr [86.202.118.225]) (Authenticated sender: kamel.bouhara@bootlin.com) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id 8467AC0016; Mon, 6 Jul 2020 11:44:06 +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 , Rob Herring Subject: [PATCH v6 4/5] dt-bindings: counter: microchip-tcb-capture counter Date: Mon, 6 Jul 2020 13:43:46 +0200 Message-Id: <20200706114347.174452-5-kamel.bouhara@bootlin.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200706114347.174452-1-kamel.bouhara@bootlin.com> References: <20200706114347.174452-1-kamel.bouhara@bootlin.com> MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@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 Reviewed-by: Rob Herring --- .../soc/microchip/atmel,at91rm9200-tcb.yaml | 32 +++++++++++++++++-- 1 file changed, 29 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 d226fd7d5258..3cd0b70cd6cf 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 @@ -153,3 +159,23 @@ examples: reg = <1>; }; }; + /* TCB0 Capture with QDEC: */ + timer@f800c000 { + 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 = "microchip,tcb-capture"; + reg = <0>, <1>; + }; + + timer@2 { + compatible = "atmel,tcb-timer"; + reg = <2>; + }; + };