Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965326AbcCJDrr (ORCPT ); Wed, 9 Mar 2016 22:47:47 -0500 Received: from regular1.263xmail.com ([211.150.99.138]:43411 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932091AbcCJDro (ORCPT ); Wed, 9 Mar 2016 22:47:44 -0500 X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 X-RL-SENDER: zhengxing@rock-chips.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: zhengxing@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 From: Xing Zheng To: linux-rockchip@lists.infradead.org Cc: heiko@sntech.de, huangtao@rock-chips.com, jay.xu@rock-chips.com, elaine.zhang@rock-chips.com, dianders@chromium.org, Xing Zheng , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Stephen Boyd , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 1/4] dt-bindings: add bindings for rk3399 clock controller Date: Thu, 10 Mar 2016 11:46:59 +0800 Message-Id: <1457581622-31192-2-git-send-email-zhengxing@rock-chips.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1457581622-31192-1-git-send-email-zhengxing@rock-chips.com> References: <1457581622-31192-1-git-send-email-zhengxing@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3480 Lines: 107 Add devicetree bindings for Rockchip cru which found on Rockchip SoCs. Signed-off-by: Xing Zheng Signed-off-by: Jianqun Xu Acked-by: Rob Herring --- Changes in v4: None Changes in v3: None Changes in v2: None .../bindings/clock/rockchip,rk3399-cru.txt | 82 ++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt b/Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt new file mode 100644 index 0000000..07bcc6e --- /dev/null +++ b/Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt @@ -0,0 +1,82 @@ +* Rockchip RK3399 Clock and Reset Unit + +The RK3399 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,rk3399-pmucru" +- compatible: CRU should be "rockchip,rk3399-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/rk3399-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, + - "ext_i2s" - external I2S clock - optional, + - "ext_gmac" - external GMAC clock - optional + - "ext_hsadc" - external HSADC clock - optional, + - "ext_isp" - external ISP clock - optional, + - "ext_jtag" - external JTAG clock - optional + - "ext_vip" - external VIP clock - optional, + - "usbotg_out" - output clock of the pll in the otg phy + +Example: General Register Files + + pmugrf: syscon@ff320000 { + compatible = "rockchip,rk3399-pmugrf", "syscon"; + reg = <0x0 0xff320000 0x0 0x1000>; + }; + + grf: syscon@ff770000 { + compatible = "rockchip,rk3399-grf", "syscon"; + reg = <0x0 0xff770000 0x0 0x10000>; + }; + +Example: Clock controller node: + + pmucru: pmu-clock-controller@ff750000 { + compatible = "rockchip,rk3399-pmucru"; + reg = <0x0 0xff750000 0x0 0x1000>; + #clock-cells = <1>; + #reset-cells = <1>; + }; + + cru: clock-controller@ff760000 { + compatible = "rockchip,rk3399-cru"; + reg = <0x0 0xff760000 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@ff1a0000 { + compatible = "rockchip,rk3399-uart", "snps,dw-apb-uart"; + reg = <0x0 0xff180000 0x0 0x100>; + clocks = <&cru SCLK_UART0>, <&cru PCLK_UART0>; + clock-names = "baudclk", "apb_pclk"; + interrupts = ; + reg-shift = <2>; + reg-io-width = <4>; + }; -- 1.7.9.5