From patchwork Thu Sep 1 12:40:33 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 664914 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3sQ21j4jGPz9s8x for ; Thu, 1 Sep 2016 22:41:29 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754612AbcIAMl1 (ORCPT ); Thu, 1 Sep 2016 08:41:27 -0400 Received: from bear.ext.ti.com ([198.47.19.11]:41839 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754525AbcIAMlZ (ORCPT ); Thu, 1 Sep 2016 08:41:25 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id u81CeleA011347; Thu, 1 Sep 2016 07:40:47 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id u81CelAm022437; Thu, 1 Sep 2016 07:40:47 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.294.0; Thu, 1 Sep 2016 07:40:46 -0500 Received: from gomoku.home (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id u81Cefgj002047; Thu, 1 Sep 2016 07:40:45 -0500 From: Tero Kristo To: , , CC: , , , Subject: [PATCHv2 1/3] Documentation: dt: Add TI SCI clock driver Date: Thu, 1 Sep 2016 15:40:33 +0300 Message-ID: <1472733635-22661-2-git-send-email-t-kristo@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1472733635-22661-1-git-send-email-t-kristo@ti.com> References: <1472733635-22661-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add a clock implementation, TI SCI clock, that will hook to the common clock framework, and allow each clock to be controlled via TI SCI protocol. Signed-off-by: Tero Kristo Tested-by: Dave Gerlach Signed-off-by: Nishanth Menon --- .../devicetree/bindings/clock/ti,sci-clk.txt | 51 ++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/ti,sci-clk.txt diff --git a/Documentation/devicetree/bindings/clock/ti,sci-clk.txt b/Documentation/devicetree/bindings/clock/ti,sci-clk.txt new file mode 100644 index 0000000..231cb80 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/ti,sci-clk.txt @@ -0,0 +1,51 @@ +Texas Instruments TI-SCI Clocks +=============================== + +All clocks on Texas Instruments' SoCs that contain a System Controller, +are only controlled by this entity. Communication between a host processor +running an OS and the System Controller happens through a protocol known +as TI-SCI[1]. This clock implementation plugs into the common clock +framework and makes use of the TI-SCI protocol on clock API requests. + +[1] Documentation/devicetree/bindings/arm/keystone/ti,sci.txt + +Required properties: +------------------- +- compatible: Must be "ti,sci-clk" +- #clock-cells: Shall be 2. + In clock consumers, this cell represents the device ID and clock ID + exposed by the PM firmware. The assignments can be found in the header + files .h> (which covers the device IDs) and + .h> (which covers the clock IDs), where + is the SoC involved, for example 'k2g'. +- ti,sci: Phandle to the TI SCI device to use for managing the clocks + +Optional properties: +------------------- +- ti,ssc-clocks: Array of phandle clocks that shall enable spread spectrum + clocking while enabled +- ti,allow-freq-change-clocks: Array of phandle clocks that shall allow + dynamic clock frequency changes by firmware +- ti,input-term-clocks: Array of phandle clocks that shall enable input + termination + +Examples: +-------- + +k2g_clks: k2g_clks { + compatible = "ti,sci-clk"; + ti,sci = <&pmmc>; + #clock-cells = <2>; +}; + +dummy_node@1234 { + clocks = <&k2g_clks K2G_DEV_DUMMY K2G_DEV_DUMMY_FCK>; +}; + +dummy_node2@2345 { + clocks = <&k2g_clks K2G_DEV_DUMMY2 K2G_DEV_DUMMY_X1_CLK>; +}; + +&k2g_clks { + ti,ssc-clocks = <&k2g_clks K2G_DEV_DUMMY K2G_DEV_DUMMY_FCK>; +}; diff --git a/MAINTAINERS b/MAINTAINERS index 0c5e3d1..ef88726 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11573,6 +11573,7 @@ S: Maintained F: Documentation/devicetree/bindings/arm/keystone/ti,sci.txt F: drivers/firmware/ti_sci* F: include/linux/soc/ti/ti_sci_protocol.h +F: Documentation/devicetree/bindings/clock/ti,sci-clk.txt THANKO'S RAREMONO AM/FM/SW RADIO RECEIVER USB DRIVER M: Hans Verkuil