From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754118AbbHLEoz (ORCPT ); Wed, 12 Aug 2015 00:44:55 -0400 Received: from mail-io0-f176.google.com ([209.85.223.176]:33068 "EHLO mail-io0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754019AbbHLEoy (ORCPT ); Wed, 12 Aug 2015 00:44:54 -0400 From: Caesar Wang To: ulf.hansson@linaro.org, khilman@linaro.org, heiko@sntech.de Cc: linux-kernel@vger.kernel.org, dmitry.torokhov@gmail.com, tomasz.figa@gmail.com, dianders@chromium.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, wxt@rock-chips.com, "jinkun.hong" Subject: [PATCH v16 1/4] dt-bindings: add document of Rockchip power domain Date: Wed, 12 Aug 2015 12:42:29 +0800 Message-Id: <1439354552-20098-2-git-send-email-wxt@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1439354552-20098-1-git-send-email-wxt@rock-chips.com> References: <1439354552-20098-1-git-send-email-wxt@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This add the necessary binding documentation for the power domain found on Rockchip Socs. Signed-off-by: jinkun.hong Signed-off-by: Caesar Wang --- Changes in v16: - remove the pmu node. Series-changes:9 - add document decription. Series-changes: 8 - document go back to v2. Series-changes: 3 - DT structure has changed. Series-changes: 2 - move clocks to "optional". .../bindings/soc/rockchip/power_domain.txt | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/rockchip/power_domain.txt diff --git a/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt new file mode 100644 index 0000000..138754d --- /dev/null +++ b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt @@ -0,0 +1,46 @@ +* Rockchip Power Domains + +Rockchip processors include support for multiple power domains which can be +powered up/down by software based on different application scenes to save power. + +Required properties for power domain controller: +- compatible: Should be one of the following. + "rockchip,rk3288-power-controller" - for RK3288 SoCs. +- #power-domain-cells: Number of cells in a power-domain specifier. + Should be 1 for multiple PM domains. +- #address-cells: Should be 1. +- #size-cells: Should be 0. + +Required properties for power domain sub nodes: +- reg: index of the power domain, should use macros in: + "include/dt-bindings/power-domain/rk3288.h" - for rk3288 type power domain. +- clocks (optional): phandles to clocks which need to be enabled while power domain + switches state. + +Example: + + power: power-controller { + compatible = "rockchip,rk3288-power-controller"; + #power-domain-cells = <1>; + #address-cells = <1>; + #size-cells = <0>; + + pd_gpu { + reg = ; + clocks = <&cru ACLK_GPU>; + }; + }; + +Node of a device using power domains must have a power-domains property, +containing a phandle to the power device node and an index specifying which +power domain to use. +The index should use macros in: + "include/dt-bindings/power-domain/rk3288.h" - for rk3288 type power domain. + +Example of the node using power domain: + + node { + /* ... */ + power-domains = <&power RK3288_PD_GPU>; + /* ... */ + }; -- 1.9.1