From patchwork Wed Dec 9 09:04:09 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeffy Chen X-Patchwork-Id: 7805481 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 3FF169F350 for ; Wed, 9 Dec 2015 09:08:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 557C320425 for ; Wed, 9 Dec 2015 09:08:32 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 67C6B20462 for ; Wed, 9 Dec 2015 09:08:31 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1a6ahp-000182-V7; Wed, 09 Dec 2015 09:06:37 +0000 Received: from regular1.263xmail.com ([211.150.99.139]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1a6agE-00074Q-Es; Wed, 09 Dec 2015 09:06:00 +0000 Received: from jeffy.chen?rock-chips.com (unknown [192.168.167.105]) by regular1.263xmail.com (Postfix) with SMTP id 7303A56A3; Wed, 9 Dec 2015 17:04:26 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id E1A33200CB; Wed, 9 Dec 2015 17:04:20 +0800 (CST) X-RL-SENDER: jeffy.chen@rock-chips.com X-FST-TO: heiko@sntech.de X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: jeffy.chen@rock-chips.com X-UNIQUE-TAG: <43102167b13a905eb43823b4eb4e436f> X-ATTACHMENT-NUM: 0 X-SENDER: cjf@rock-chips.com X-DNS-TYPE: 0 Received: from localhost (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 6928P1KC3S; Wed, 09 Dec 2015 17:04:23 +0800 (CST) From: Jeffy Chen To: heiko@sntech.de, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 4/8] dt-bindings: add documentation of rk3228 clock controller Date: Wed, 9 Dec 2015 17:04:09 +0800 Message-Id: <1449651853-1667-5-git-send-email-jeffy.chen@rock-chips.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1449651853-1667-1-git-send-email-jeffy.chen@rock-chips.com> References: <1449651853-1667-1-git-send-email-jeffy.chen@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151209_010543_934873_C3EBCE2B X-CRM114-Status: GOOD ( 10.04 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Xing Zheng , Pawel Moll , Ian Campbell , Jeffy Chen , Rob Herring , Kumar Gala MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add the devicetree binding for the cru on the rk3228 which quite similar structured as previous clock controllers. Signed-off-by: Jeffy Chen Acked-by: Rob Herring --- .../bindings/clock/rockchip,rk3228-cru.txt | 58 ++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3228-cru.txt diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3228-cru.txt b/Documentation/devicetree/bindings/clock/rockchip,rk3228-cru.txt new file mode 100644 index 0000000..f323048 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/rockchip,rk3228-cru.txt @@ -0,0 +1,58 @@ +* Rockchip RK3228 Clock and Reset Unit + +The RK3228 clock controller generates and supplies clock to various +controllers within the SoC and also implements a reset controller for SoC +peripherals. + +Required Properties: + +- compatible: should be "rockchip,rk3228-cru" +- reg: physical base address of the controller and length of memory mapped + region. +- #clock-cells: should be 1. +- #reset-cells: should be 1. + +Optional Properties: + +- rockchip,grf: phandle to the syscon managing the "general register files" + If missing pll rates are not changeable, due to the missing pll lock status. + +Each clock is assigned an identifier and client nodes can use this identifier +to specify the clock which they consume. All available clocks are defined as +preprocessor macros in the dt-bindings/clock/rk3228-cru.h headers and can be +used in device tree sources. Similar macros exist for the reset sources in +these files. + +External clocks: + +There are several clocks that are generated outside the SoC. It is expected +that they are defined using standard clock bindings with following +clock-output-names: + - "xin24m" - crystal input - required, + - "ext_i2s" - external I2S clock - optional, + - "ext_gmac" - external GMAC clock - optional + - "ext_hsadc" - external HSADC clock - optional + - "phy_50m_out" - output clock of the pll in the mac phy + +Example: Clock controller node: + + cru: cru@20000000 { + compatible = "rockchip,rk3228-cru"; + reg = <0x20000000 0x1000>; + rockchip,grf = <&grf>; + + #clock-cells = <1>; + #reset-cells = <1>; + }; + +Example: UART controller node that consumes the clock generated by the clock + controller: + + uart0: serial@10110000 { + compatible = "snps,dw-apb-uart"; + reg = <0x10110000 0x100>; + interrupts = ; + reg-shift = <2>; + reg-io-width = <4>; + clocks = <&cru SCLK_UART0>; + };