From patchwork Mon Feb 17 20:07:41 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Heiko_St=C3=BCbner?= X-Patchwork-Id: 3664581 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 8228F9F1EE for ; Mon, 17 Feb 2014 20:08:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7F2D0201C7 for ; Mon, 17 Feb 2014 20:08:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E9A902021A for ; Mon, 17 Feb 2014 20:08:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754255AbaBQUIc (ORCPT ); Mon, 17 Feb 2014 15:08:32 -0500 Received: from gloria.sntech.de ([95.129.55.99]:37438 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753346AbaBQUIa (ORCPT ); Mon, 17 Feb 2014 15:08:30 -0500 Received: from ip545477c2.speed.planet.nl ([84.84.119.194] helo=phil.localnet) by gloria.sntech.de with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.80) (envelope-from ) id 1WFUUP-0000ma-KG; Mon, 17 Feb 2014 21:08:29 +0100 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: Kukjin Kim Cc: mturquette@linaro.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Thomas Abraham , t.figa@samsung.com Subject: [PATCH v5 3/7] dt-bindings: add binding for clock-controller of s3c2443 and following Date: Mon, 17 Feb 2014 21:07:41 +0100 Message-ID: <1988831.Dy3Hv7r70k@phil> User-Agent: KMail/4.11.5 (Linux/3.12-1-amd64; KDE/4.11.3; x86_64; ; ) In-Reply-To: <2678040.KALsQ0bZFm@phil> References: <2678040.KALsQ0bZFm@phil> MIME-Version: 1.0 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=-7.5 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 Starting with the s3c2443 the s3c24xx series got a new clock tree compared to the previous s3c24xx socs. This binding describes the clock controller found in the s3c2443, s3c2416 and s3c2450 socs. Signed-off-by: Heiko Stuebner Acked-by: Tomasz Figa --- .../bindings/clock/samsung,s3c2443-clock.txt | 56 ++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/samsung,s3c2443-clock.txt diff --git a/Documentation/devicetree/bindings/clock/samsung,s3c2443-clock.txt b/Documentation/devicetree/bindings/clock/samsung,s3c2443-clock.txt new file mode 100644 index 0000000..a2d94c9 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/samsung,s3c2443-clock.txt @@ -0,0 +1,56 @@ +* Samsung S3C2443 Clock Controller + +The S3C2443 clock controller generates and supplies clock to various controllers +within the SoC. The clock binding described here is applicable to all SoCs in +the s3c24x family starting with the s3c2443. + +Required Properties: + +- compatible: should be one of the following. + - "samsung,s3c2416-clock" - controller compatible with S3C2416 SoC. + - "samsung,s3c2443-clock" - controller compatible with S3C2443 SoC. + - "samsung,s3c2450-clock" - controller compatible with S3C2450 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/s3c2443.h header and can be used in device +tree sources. + +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: + - "xti" - crystal input - required, + - "ext" - external clock source - optional, + - "ext_i2s" - external I2S clock - optional, + - "ext_uart" - external uart clock - optional, + +Example: Clock controller node: + + clocks: clock-controller@4c000000 { + compatible = "samsung,s3c2416-clock"; + reg = <0x4c000000 0x40>; + #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", + "clk_uart_baud3"; + clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>, + <&clocks SCLK_UART>; + status = "disabled"; + };