Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932490AbbHYHZo (ORCPT ); Tue, 25 Aug 2015 03:25:44 -0400 Received: from mail-pd0-f173.google.com ([209.85.192.173]:36258 "EHLO mail-pd0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932404AbbHYHZl (ORCPT ); Tue, 25 Aug 2015 03:25:41 -0400 From: Caesar Wang To: heiko@sntech.de, khilman@linaro.org Cc: ulf.hansson@linaro.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, dianders@chromium.org, tomasz.figa@gmail.com, dmitry.torokhov@gmail.com, linux-kernel@vger.kernel.org, galak@codeaurora.org, linux@arm.linux.org.uk, robh+dt@kernel.org, arnd@arndb.de, linus.walleij@linaro.org, ijc+devicetree@hellion.org.uk, devicetree@vger.kernel.org, wxt@rock-chips.com, "jinkun.hong" Subject: [RESEND PATCH v16 1/4] dt-bindings: add document of Rockchip power domain Date: Tue, 25 Aug 2015 15:24:43 +0800 Message-Id: <1440487486-6154-2-git-send-email-wxt@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1440487486-6154-1-git-send-email-wxt@rock-chips.com> References: <1440487486-6154-1-git-send-email-wxt@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2831 Lines: 97 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. Changes in v15: None Changes in v14: None Changes in v13: None Changes in v12: None Changes in v11: None Changes in v10: None Changes in v9: - add document decription. Changes in v8: - document go back to v2. Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: None Changes in v3: - DT structure has changed. Changes in v2: - 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/