From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by aws-us-west-2-korg-lkml-1.web.codeaurora.org (Postfix) with ESMTP id 290E0C5CFC0 for ; Fri, 15 Jun 2018 02:17:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DFE09208D7 for ; Fri, 15 Jun 2018 02:17:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DFE09208D7 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965357AbeFOCRK (ORCPT ); Thu, 14 Jun 2018 22:17:10 -0400 Received: from regular1.263xmail.com ([211.150.99.135]:47497 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936083AbeFOCRI (ORCPT ); Thu, 14 Jun 2018 22:17:08 -0400 Received: from zhangqing?rock-chips.com (unknown [192.168.167.205]) by regular1.263xmail.com (Postfix) with ESMTP id 44CEB1E377; Fri, 15 Jun 2018 10:17:03 +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 ESMTPA id 6D8AC345; Fri, 15 Jun 2018 10:16:55 +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 1616213MJI2; Fri, 15 Jun 2018 10:16:59 +0800 (CST) From: Elaine Zhang To: heiko@sntech.de Cc: sboyd@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, mturquette@baylibre.com, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, cl@rock-chips.com, xxx@rock-chips.com, xf@rock-chips.com, huangtao@rock-chips.com, Elaine Zhang Subject: [PATCH v3 1/4] dt-bindings: add bindings for px30 clock controller Date: Fri, 15 Jun 2018 10:16:48 +0800 Message-Id: <1529029011-15021-2-git-send-email-zhangqing@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1529029011-15021-1-git-send-email-zhangqing@rock-chips.com> References: <1529029011-15021-1-git-send-email-zhangqing@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add devicetree bindings for Rockchip cru which found on Rockchip SoCs. Signed-off-by: Elaine Zhang --- .../bindings/clock/rockchip,px30-cru.txt | 66 ++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/rockchip,px30-cru.txt diff --git a/Documentation/devicetree/bindings/clock/rockchip,px30-cru.txt b/Documentation/devicetree/bindings/clock/rockchip,px30-cru.txt new file mode 100644 index 000000000000..1077692d6489 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/rockchip,px30-cru.txt @@ -0,0 +1,66 @@ +* Rockchip PX30 Clock and Reset Unit + +The PX30 clock controller generates and supplies clock to various +controllers within the SoC and also implements a reset controller for SoC +peripherals. + +Required Properties: + +- compatible: PMU for CRU should be "rockchip,px30-pmu-cru" +- compatible: CRU should be "rockchip,px30-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/px30-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, + - "xin32k" - rtc clock - optional, + - "i2sx_clkin" - external I2S clock - optional, + - "gmac_clkin" - external GMAC clock - optional + +Example: Clock controller node: + + pmucru: clock-controller@ff2bc000 { + compatible = "rockchip,px30-pmucru"; + reg = <0x0 0xff2bc000 0x0 0x1000>; + #clock-cells = <1>; + #reset-cells = <1>; + }; + + cru: clock-controller@ff2b0000 { + compatible = "rockchip,px30-cru"; + reg = <0x0 0xff2b0000 0x0 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@ff030000 { + compatible = "rockchip,px30-uart", "snps,dw-apb-uart"; + reg = <0x0 0xff030000 0x0 0x100>; + interrupts = ; + clocks = <&pmucru SCLK_UART0_PMU>, <&pmucru PCLK_UART0_PMU>; + clock-names = "baudclk", "apb_pclk"; + reg-shift = <2>; + reg-io-width = <4>; + }; + -- 1.9.1