From patchwork Fri Jun 2 01:47:24 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhangqing X-Patchwork-Id: 9761401 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A47E2602BC for ; Fri, 2 Jun 2017 01:44:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A01A328418 for ; Fri, 2 Jun 2017 01:44:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 94BF028552; Fri, 2 Jun 2017 01:44:52 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2EAAA2846C for ; Fri, 2 Jun 2017 01:44:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=pum+Vy92DcEtF06hFgS997Q0E3XBuBvBcR7yppGEN5M=; b=hsngGSGTZr2s+aOXSyRCKovvA1 X0r+yz8ydmsv3b0iwkCb6KQWvv5r/qGs9W6lYYVEmfIYheR1m4IdxJnO8rwc04tbIvb5dR5mz54HF kr1z3nF4nOGxbZ9qzK5r5QRhrtZLiu7Il4gI6I6wFXLvErceIBGwo/g+VuT6zB76oSNaT0GA1P/RA 4Szb6QFAPmDxAjMLyxiHA2TUBGRiyN0TSr8HlF2067j+HUbScqP9pzT2AEoJLnvphegK4oS0Dj7DP 6iymDYbDvjVgBQ4ctpAb0YvgiS342fal7+Lp+dYCzwrewZC5LTMYVajl1gC5Gjf1lF9BXQuoO8Iyz t5XgtHVQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dGbdx-0007Ks-Ho; Fri, 02 Jun 2017 01:44:49 +0000 Received: from regular1.263xmail.com ([211.150.99.130]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dGbdi-0006nS-3E; Fri, 02 Jun 2017 01:44:36 +0000 Received: from zhangqing?rock-chips.com (unknown [192.168.167.179]) by regular1.263xmail.com (Postfix) with ESMTP id F31CCB076; Fri, 2 Jun 2017 09:44:09 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id 57ECC3DE; Fri, 2 Jun 2017 09:44:06 +0800 (CST) X-RL-SENDER: zhangqing@rock-chips.com X-FST-TO: heiko@sntech.de X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: zhangqing@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-SENDER: zhangqing@rock-chips.com X-DNS-TYPE: 0 Received: from unknown (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith SMTP id 28260XJ43H4; Fri, 02 Jun 2017 09:44:09 +0800 (CST) From: Elaine Zhang To: heiko@sntech.de, xf@rock-chips.com Subject: [PATCH v4 2/3] dt-bindings: add bindings for rk3128 clock controller Date: Fri, 2 Jun 2017 09:47:24 +0800 Message-Id: <1496368045-17746-3-git-send-email-zhangqing@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1496368045-17746-1-git-send-email-zhangqing@rock-chips.com> References: <1496368045-17746-1-git-send-email-zhangqing@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170601_184434_665529_374D5813 X-CRM114-Status: UNSURE ( 8.85 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: huangtao@rock-chips.com, devicetree@vger.kernel.org, zhengxing@rock-chips.com, mturquette@baylibre.com, xxx@rock-chips.com, Elaine Zhang , sboyd@codeaurora.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org, mark.rutland@arm.com, linux-clk@vger.kernel.org, cl@rock-chips.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add devicetree bindings for Rockchip cru which found on Rockchip SoCs. Signed-off-by: Elaine Zhang --- .../bindings/clock/rockchip,rk3128-cru.txt | 56 ++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3128-cru.txt diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3128-cru.txt b/Documentation/devicetree/bindings/clock/rockchip,rk3128-cru.txt new file mode 100644 index 000000000000..455a9a00a623 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/rockchip,rk3128-cru.txt @@ -0,0 +1,56 @@ +* Rockchip RK3128 Clock and Reset Unit + +The RK3128 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,rk3128-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/rk3128-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, + - "gmac_clkin" - external GMAC clock - optional + +Example: Clock controller node: + + cru: cru@20000000 { + compatible = "rockchip,rk3128-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: + + uart2: serial@20068000 { + compatible = "rockchip,serial"; + reg = <0x20068000 0x100>; + interrupts = ; + clock-frequency = <24000000>; + clocks = <&cru SCLK_UART2>, <&cru PCLK_UART2>; + clock-names = "sclk_uart", "pclk_uart"; + };