Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755961Ab3G2NNg (ORCPT ); Mon, 29 Jul 2013 09:13:36 -0400 Received: from gloria.sntech.de ([95.129.55.99]:41305 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754744Ab3G2NNf (ORCPT ); Mon, 29 Jul 2013 09:13:35 -0400 From: Heiko =?utf-8?q?St=C3=BCbner?= To: Arnd Bergmann Subject: [PATCH v4 4/6] ARM: rockchip: add sram dt nodes and documentation Date: Mon, 29 Jul 2013 15:13:50 +0200 User-Agent: KMail/1.13.7 (Linux/3.2.0-2-amd64; KDE/4.8.4; x86_64; ; ) Cc: Olof Johansson , "linux-arm-kernel@lists.infradead.org" , Grant Likely , Rob Herring , devicetree-discuss@lists.ozlabs.org, Russell King , Philipp Zabel , linux-kernel@vger.kernel.org, "Greg Kroah-Hartman" , Ulrich Prinz References: <201307291510.31679.heiko@sntech.de> In-Reply-To: <201307291510.31679.heiko@sntech.de> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201307291513.50507.heiko@sntech.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2371 Lines: 66 The Rockchip SoCs need a special part of their sram for bringup of additional cores. Therefore also add a reserved section when adding the mmio-sram node to keep the sram driver from using this space. Signed-off-by: Heiko Stuebner Tested-by: Ulrich Prinz --- .../devicetree/bindings/arm/rockchip/smp-sram.txt | 23 ++++++++++++++++++++ arch/arm/boot/dts/rk3066a.dtsi | 6 +++++ 2 files changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt diff --git a/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt b/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt new file mode 100644 index 0000000..80c878e --- /dev/null +++ b/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt @@ -0,0 +1,23 @@ +Rockchip SRAM for smp bringup: +------------------------------ + +Rockchip's smp-capable SoCs use the first part of the sram for the bringup +of the cores. Once the core gets powered up it executes the code that is +residing at the very beginning of the sram. + +Therefore a reserved section has to be added to the mmio-sram declaration. + +Required node properties: +- compatible : should contain both "rockchip,rk3066-sram", "mmio-sram" + so that the smp code can select the correct sram node. + +The rest of the properties should follow the generic mmio-sram discription +found in ../../misc/sram.txt + +Example: + + sram: sram@10080000 { + compatible = "rockchip,rk3066-sram", "mmio-sram"; + reg = <0x10080000 0x10000>; + mmio-sram-reserved = <0x0 0x50>; + }; diff --git a/arch/arm/boot/dts/rk3066a.dtsi b/arch/arm/boot/dts/rk3066a.dtsi index 26c4311..24d1941 100644 --- a/arch/arm/boot/dts/rk3066a.dtsi +++ b/arch/arm/boot/dts/rk3066a.dtsi @@ -53,6 +53,12 @@ reg = <0x1013c000 0x100>; }; + sram: sram@10080000 { + compatible = "rockchip,rk3066-sram", "mmio-sram"; + reg = <0x10080000 0x10000>; + mmio-sram-reserved = <0x0 0x50>; + }; + gic: interrupt-controller@1013d000 { compatible = "arm,cortex-a9-gic"; interrupt-controller; -- 1.7.10.4 -- 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/