From patchwork Fri Jun 15 02:16:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhangqing X-Patchwork-Id: 10465605 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 6F16B603B4 for ; Fri, 15 Jun 2018 02:18:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5CCE928C12 for ; Fri, 15 Jun 2018 02:18:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5169C28C49; Fri, 15 Jun 2018 02:18:16 +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=-1.4 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, MAILING_LIST_MULTI, RCVD_IN_SORBS_WEB autolearn=no version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id F2C5B28C12 for ; Fri, 15 Jun 2018 02:18:15 +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=RC8k7YsUu8EXpYt1CwEcXFahbS7bWWUi11MLmhEUCiw=; b=Kq0Wew57oxqTPvONQF/iz2xzuW qd3InZeT92rw5p750Fz3ET4wyd7yvEH2/Jq+zGp8D39heZFUG4+CBmRRMokznhqu+HYHSPVALSz+A qHhAzYBGbygwkLMUJER1FQwHBwz3rvLOvCllhcdTKnBPk7tkm2cqQ10fptdUHNG00V4V1SSFmVzXv AIMIMUk4E2z2gdGVsN6X+UqF9tNG7miM2KEMCDSeDLtTAHuvEWF8RKPx4leIoryDk9xf3hlXYZVqX XdQBVhSKeaMwjR2d5fURLk8WDNh9oVPn0t6mlFpcm4vm2sx0t0CPPA54DlzcpjdweKWxDJmY152BK sDcpQ01w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fTeJR-0002lT-Pn; Fri, 15 Jun 2018 02:18:05 +0000 Received: from regular1.263xmail.com ([211.150.99.135]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fTeIg-0002HN-7X; Fri, 15 Jun 2018 02:17:22 +0000 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 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180614_191718_671507_9CF335FC X-CRM114-Status: GOOD ( 15.01 ) 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: mark.rutland@arm.com, devicetree@vger.kernel.org, xxx@rock-chips.com, huangtao@rock-chips.com, xf@rock-chips.com, sboyd@kernel.org, mturquette@baylibre.com, Elaine Zhang , linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, robh+dt@kernel.org, cl@rock-chips.com, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org 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 Reviewed-by: Rob Herring --- .../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>; + }; +