From patchwork Wed Dec 12 22:08:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 10727311 X-Patchwork-Delegate: paulburton@kernel.org 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 578EC14E2 for ; Wed, 12 Dec 2018 22:19:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 480CF2A15B for ; Wed, 12 Dec 2018 22:19:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3B6D42A17D; Wed, 12 Dec 2018 22:19:41 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham 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 7C7AA2A15B for ; Wed, 12 Dec 2018 22:19:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728383AbeLLWT1 (ORCPT ); Wed, 12 Dec 2018 17:19:27 -0500 Received: from outils.crapouillou.net ([89.234.176.41]:40644 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728505AbeLLWQm (ORCPT ); Wed, 12 Dec 2018 17:16:42 -0500 From: Paul Cercueil To: Thierry Reding , Rob Herring , Mark Rutland , Daniel Lezcano , Thomas Gleixner , Ralf Baechle , Paul Burton , James Hogan , Jonathan Corbet Cc: Mathieu Malaterre , Ezequiel Garcia , PrasannaKumar Muralidharan , linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-mips@vger.kernel.org, linux-doc@vger.kernel.org, linux-clk@vger.kernel.org, od@zcrc.me, Paul Cercueil Subject: [PATCH v8 03/26] dt-bindings: Add doc for the Ingenic TCU drivers Date: Wed, 12 Dec 2018 23:08:58 +0100 Message-Id: <20181212220922.18759-4-paul@crapouillou.net> In-Reply-To: <20181212220922.18759-1-paul@crapouillou.net> References: <20181212220922.18759-1-paul@crapouillou.net> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1544652578; bh=WmBmpHmmBT6vM1ZMq288q+nlCnDnyMUMXyAXz7vI4vY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=g1ftAF9Nw1e18UtkNXG1Sv9sKuOrtMIZ2BUG4b+12tTMplzSQtONuPCg3AvzQ+w5CVwDRizvp1cR2Qd3F3uJ3EckPPxxV98IsFlbikKAzBhax1Wu1TdosZ3Ipu/M3Q6RHcqUh6s5rFxFsXlXBsDVywIZwBxwwoHq/R9Lm7CbadY= Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add documentation about how to properly use the Ingenic TCU (Timer/Counter Unit) drivers from devicetree. Signed-off-by: Paul Cercueil --- Notes: v4: New patch in this series. Corresponds to V2 patches 3-4-5 with added content. v5: - Edited PWM/watchdog DT bindings documentation to point to the new document. - Moved main document to Documentation/devicetree/bindings/timer/ingenic,tcu.txt - Updated documentation to reflect the new devicetree bindings. v6: - Removed PWM/watchdog documentation files as asked by upstream - Removed doc about properties that should be implicit - Removed doc about ingenic,timer-channel / ingenic,clocksource-channel as they are gone - Fix WDT clock name in the binding doc - Fix lengths of register areas in watchdog/pwm nodes v7: No change v8: - Fix address of the PWM node - Added doc about system timer and clocksource children nodes .../devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt | 25 --- .../devicetree/bindings/timer/ingenic,tcu.txt | 176 +++++++++++++++++++++ .../bindings/watchdog/ingenic,jz4740-wdt.txt | 17 -- 3 files changed, 176 insertions(+), 42 deletions(-) delete mode 100644 Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt create mode 100644 Documentation/devicetree/bindings/timer/ingenic,tcu.txt delete mode 100644 Documentation/devicetree/bindings/watchdog/ingenic,jz4740-wdt.txt diff --git a/Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt b/Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt deleted file mode 100644 index 7d9d3f90641b..000000000000 --- a/Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt +++ /dev/null @@ -1,25 +0,0 @@ -Ingenic JZ47xx PWM Controller -============================= - -Required properties: -- compatible: One of: - * "ingenic,jz4740-pwm" - * "ingenic,jz4770-pwm" - * "ingenic,jz4780-pwm" -- #pwm-cells: Should be 3. See pwm.txt in this directory for a description - of the cells format. -- clocks : phandle to the external clock. -- clock-names : Should be "ext". - - -Example: - - pwm: pwm@10002000 { - compatible = "ingenic,jz4740-pwm"; - reg = <0x10002000 0x1000>; - - #pwm-cells = <3>; - - clocks = <&ext>; - clock-names = "ext"; - }; diff --git a/Documentation/devicetree/bindings/timer/ingenic,tcu.txt b/Documentation/devicetree/bindings/timer/ingenic,tcu.txt new file mode 100644 index 000000000000..8a4ce7edf50f --- /dev/null +++ b/Documentation/devicetree/bindings/timer/ingenic,tcu.txt @@ -0,0 +1,176 @@ +Ingenic JZ47xx SoCs Timer/Counter Unit devicetree bindings +========================================================== + +For a description of the TCU hardware and drivers, have a look at +Documentation/mips/ingenic-tcu.txt. + +Required properties: + +- compatible: Must be one of: + * ingenic,jz4740-tcu + * ingenic,jz4725b-tcu + * ingenic,jz4770-tcu +- reg: Should be the offset/length value corresponding to the TCU registers +- clocks: List of phandle & clock specifiers for clocks external to the TCU. + The "pclk", "rtc", "ext" and "tcu" clocks should be provided. +- clock-names: List of name strings for the external clocks. +- #clock-cells: Should be <1>; + Clock consumers specify this argument to identify a clock. The valid values + may be found in . +- interrupt-controller : Identifies the node as an interrupt controller +- #interrupt-cells : Specifies the number of cells needed to encode an + interrupt source. The value should be 1. +- interrupt-parent : phandle of the interrupt controller. +- interrupts : Specifies the interrupt the controller is connected to. + + +Children nodes +========================================================== + + +PWM node: +--------- + +Required properties: + +- compatible: Must be one of: + * ingenic,jz4740-pwm + * ingenic,jz4725b-pwm +- #pwm-cells: Should be 3. See ../pwm/pwm.txt for a description of the cell + format. +- clocks: List of phandle & clock specifiers for the TCU clocks. +- clock-names: List of name strings for the TCU clocks. + + +Watchdog node: +-------------- + +Required properties: + +- compatible: Must be one of: + * ingenic,jz4740-watchdog + * ingenic,jz4780-watchdog +- clocks: phandle to the WDT clock +- clock-names: should be "wdt" + + +OST node: +--------- + +Required properties: + +- compatible: Must be one of: + * ingenic,jz4725b-ost + * ingenic,jz4770-ost +- clocks: phandle to the OST clock +- clock-names: should be "ost" +- interrupts : Specifies the interrupt the OST is connected to. + + +System timer node: +------------------ + +Required properties: + +- compatible: Must be "ingenic,jz4740-tcu-timer" +- clocks: phandle to the clock of the TCU channel used +- clock-names: Should be "timer" +- interrupts : Specifies the interrupt line of the TCU channel used. + + +System clocksource node: +------------------------ + +Required properties: + +- compatible: Must be "ingenic,jz4740-tcu-clocksource" +- clocks: phandle to the clock of the TCU channel used +- clock-names: Should be "timer" + + +Example +========================================================== + +#include +#include + +/ { + tcu: timer@10002000 { + compatible = "ingenic,jz4770-tcu"; + reg = <0x10002000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0x0 0x10002000 0x1000>; + + #clock-cells = <1>; + + clocks = <&cgu JZ4770_CLK_RTC + &cgu JZ4770_CLK_EXT + &cgu JZ4770_CLK_PCLK + &cgu JZ4770_CLK_EXT>; + clock-names = "rtc", "ext", "pclk", "tcu"; + + interrupt-controller; + #interrupt-cells = <1>; + + interrupt-parent = <&intc>; + interrupts = <27 26 25>; + + watchdog: watchdog@0 { + compatible = "ingenic,jz4740-watchdog"; + reg = <0x0 0xc>; + + clocks = <&tcu TCU_CLK_WDT>; + clock-names = "wdt"; + }; + + timer: timer@40 { + compatible = "ingenic,jz4740-tcu-timer"; + reg = <0x40 0x10>; + + clocks = <&tcu TCU_CLK_TIMER0>; + clock-names = "timer"; + + interrupts = <0>; + }; + + clocksource: timer@50 { + compatible = "ingenic,jz4740-tcu-clocksource"; + reg = <0x50 0x10>; + + clocks = <&tcu TCU_CLK_TIMER1>; + clock-names = "timer"; + + /* Disable by default, since the OST is more precise */ + status = "disabled"; + }; + + pwm: pwm@60 { + compatible = "ingenic,jz4740-pwm"; + reg = <0x60 0x60>; + + #pwm-cells = <3>; + + clocks = <&tcu TCU_CLK_TIMER0 + &tcu TCU_CLK_TIMER1 + &tcu TCU_CLK_TIMER2 + &tcu TCU_CLK_TIMER3 + &tcu TCU_CLK_TIMER4 + &tcu TCU_CLK_TIMER5 + &tcu TCU_CLK_TIMER6 + &tcu TCU_CLK_TIMER7>; + clock-names = "timer0", "timer1", "timer2", "timer3", + "timer4", "timer5", "timer6", "timer7"; + }; + + ost: timer@e0 { + compatible = "ingenic,jz4770-ost"; + reg = <0xe0 0x20>; + + clocks = <&tcu TCU_CLK_OST>; + clock-names = "ost"; + + interrupts = <15>; + }; + }; +}; diff --git a/Documentation/devicetree/bindings/watchdog/ingenic,jz4740-wdt.txt b/Documentation/devicetree/bindings/watchdog/ingenic,jz4740-wdt.txt deleted file mode 100644 index ce1cb72d5345..000000000000 --- a/Documentation/devicetree/bindings/watchdog/ingenic,jz4740-wdt.txt +++ /dev/null @@ -1,17 +0,0 @@ -Ingenic Watchdog Timer (WDT) Controller for JZ4740 & JZ4780 - -Required properties: -compatible: "ingenic,jz4740-watchdog" or "ingenic,jz4780-watchdog" -reg: Register address and length for watchdog registers -clocks: phandle to the RTC clock -clock-names: should be "rtc" - -Example: - -watchdog: jz4740-watchdog@10002000 { - compatible = "ingenic,jz4740-watchdog"; - reg = <0x10002000 0x10>; - - clocks = <&cgu JZ4740_CLK_RTC>; - clock-names = "rtc"; -};