From patchwork Fri Dec 13 13:01:26 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 3340271 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id DD9199F243 for ; Fri, 13 Dec 2013 13:01:56 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0EC2B20585 for ; Fri, 13 Dec 2013 13:01:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A6C25207AE for ; Fri, 13 Dec 2013 13:01:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752282Ab3LMNBn (ORCPT ); Fri, 13 Dec 2013 08:01:43 -0500 Received: from gloria.sntech.de ([95.129.55.99]:38491 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752018Ab3LMNBl (ORCPT ); Fri, 13 Dec 2013 08:01:41 -0500 Received: from 146-52-37-199-dynip.superkabel.de ([146.52.37.199] helo=marty.localnet) by gloria.sntech.de with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.80) (envelope-from ) id 1VrSMy-0006jg-K7; Fri, 13 Dec 2013 14:01:28 +0100 To: Kukjin Kim Subject: [PATCH 07/12] dt-bindings: add documentation for s3c2410 clock controller Cc: t.figa@samsung.com, mturquette@linaro.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Rob Herring , Pawel Moll , Mark Rutland , Stephen Warren , Ian Campbell , devicetree@vger.kernel.org From: Heiko =?utf-8?q?St=C3=BCbner?= Date: Fri, 13 Dec 2013 14:01:26 +0100 MIME-Version: 1.0 Message-Id: <201312131401.27076.heiko@sntech.de> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 Describe the clock controller of s3c2410, s3c2440 and s3c2442. Signed-off-by: Heiko Stuebner --- .../bindings/clock/samsung,s3c2410-clock.txt | 50 ++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/samsung,s3c2410-clock.txt diff --git a/Documentation/devicetree/bindings/clock/samsung,s3c2410-clock.txt b/Documentation/devicetree/bindings/clock/samsung,s3c2410-clock.txt new file mode 100644 index 0000000..0b64ad8 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/samsung,s3c2410-clock.txt @@ -0,0 +1,50 @@ +* Samsung S3C2410 Clock Controller + +The S3C2410 clock controller generates and supplies clock to various controllers +within the SoC. The clock binding described here is applicable to the s3c2410, +s3c2440 and s3c2442 SoCs in the s3c24x family. + +Required Properties: + +- compatible: should be one of the following. + - "samsung,s3c2410-clock" - controller compatible with S3C2410 SoC. + - "samsung,s3c2440-clock" - controller compatible with S3C2440 SoC. + - "samsung,s3c2442-clock" - controller compatible with S3C2442 SoC. +- reg: physical base address of the controller and length of memory mapped + region. +- #clock-cells: should be 1. + +Each clock is assigned an identifier and client nodes can use this identifier +to specify the clock which they consume. Some of the clocks are available only +on a particular SoC. + +All available clocks are defined as preprocessor macros in +dt-bindings/clock/samsung,s3c2410-clock.h header and can be used in device +tree sources. + +External clocks: + +The xti clock used as input for the plls is generated outside the SoC. It is +expected that is are defined using standard clock bindings with a +clock-output-names value of "xti". + +Example: Clock controller node: + + clocks: clock-controller@4c000000 { + compatible = "samsung,s3c2410-clock"; + reg = <0x4c000000 0x20>; + #clock-cells = <1>; + }; + +Example: UART controller node that consumes the clock generated by the clock + controller (refer to the standard clock bindings for information about + "clocks" and "clock-names" properties): + + serial@50004000 { + compatible = "samsung,s3c2440-uart"; + reg = <0x50004000 0x4000>; + interrupts = <1 23 3 4>, <1 23 4 4>; + clock-names = "uart", "clk_uart_baud2"; + clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>; + status = "disabled"; + };