From patchwork Mon Oct 21 16:13:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1180728 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="o+B4P02h"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46xhXt6nCxz9sPL for ; Tue, 22 Oct 2019 03:14:22 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729734AbfJUQOT (ORCPT ); Mon, 21 Oct 2019 12:14:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:36674 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726289AbfJUQOT (ORCPT ); Mon, 21 Oct 2019 12:14:19 -0400 Received: from localhost.localdomain (unknown [194.230.155.217]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 327F921928; Mon, 21 Oct 2019 16:14:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571674458; bh=Ccmnu6nOxDiVIz1NGNVhXQ9dyLKK9QddZTiml6Ecya8=; h=From:To:Subject:Date:In-Reply-To:References:From; b=o+B4P02hmGXNzk0OhAGP0/wFMKWMmuCS885TPCqqBYEeCT/j1rmYRplBpJR6yJTl+ ZWlYqXeU1W589WuJ5CQNPe4WjwkXgmrWqHwjFIX5fqnWkfdosncmtRcaM6euEdhURW bci/YEvMRwmfZ0Vvni42uUZRJpwxwHyARPRPT4x8= From: Krzysztof Kozlowski To: Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai , Heiko Stuebner , Krzysztof Kozlowski , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org Subject: [PATCH v4 6/7] dt-bindings: sram: Merge Allwinner SRAM bindings into generic Date: Mon, 21 Oct 2019 18:13:50 +0200 Message-Id: <20191021161351.20789-6-krzk@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191021161351.20789-1-krzk@kernel.org> References: <20191021161351.20789-1-krzk@kernel.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The Allwinner SRAM bindings list only compatible so integrate them into generic SRAM bindings schema. Signed-off-by: Krzysztof Kozlowski --- Changes since v3: 1. New patch --- .../bindings/arm/sunxi/smp-sram.txt | 44 ------------------- .../devicetree/bindings/sram/sram.yaml | 25 +++++++++++ 2 files changed, 25 insertions(+), 44 deletions(-) delete mode 100644 Documentation/devicetree/bindings/arm/sunxi/smp-sram.txt diff --git a/Documentation/devicetree/bindings/arm/sunxi/smp-sram.txt b/Documentation/devicetree/bindings/arm/sunxi/smp-sram.txt deleted file mode 100644 index 082e6a9382d3..000000000000 --- a/Documentation/devicetree/bindings/arm/sunxi/smp-sram.txt +++ /dev/null @@ -1,44 +0,0 @@ -Allwinner SRAM for smp bringup: ------------------------------------------------- - -Allwinner's A80 SoC uses part of the secure sram for hotplugging of the -primary core (cpu0). Once the core gets powered up it checks if a magic -value is set at a specific location. If it is then the BROM will jump -to the software entry address, instead of executing a standard boot. - -Therefore a reserved section sub-node has to be added to the mmio-sram -declaration. - -Note that this is separate from the Allwinner SRAM controller found in -../../sram/sunxi-sram.txt. This SRAM is secure only and not mappable to -any device. - -Also there are no "secure-only" properties. The implementation should -check if this SRAM is usable first. - -Required sub-node properties: -- compatible : depending on the SoC this should be one of: - "allwinner,sun9i-a80-smp-sram" - -The rest of the properties should follow the generic mmio-sram discription -found in ../../misc/sram.txt - -Example: - - sram_b: sram@20000 { - /* 256 KiB secure SRAM at 0x20000 */ - compatible = "mmio-sram"; - reg = <0x00020000 0x40000>; - #address-cells = <1>; - #size-cells = <1>; - ranges = <0 0x00020000 0x40000>; - - smp-sram@1000 { - /* - * This is checked by BROM to determine if - * cpu0 should jump to SMP entry vector - */ - compatible = "allwinner,sun9i-a80-smp-sram"; - reg = <0x1000 0x8>; - }; - }; diff --git a/Documentation/devicetree/bindings/sram/sram.yaml b/Documentation/devicetree/bindings/sram/sram.yaml index 1c2d8b0408c0..95d8cc7e2b87 100644 --- a/Documentation/devicetree/bindings/sram/sram.yaml +++ b/Documentation/devicetree/bindings/sram/sram.yaml @@ -65,6 +65,7 @@ patternProperties: Should contain a vendor specific string in the form ,[-] enum: + - allwinner,sun9i-a80-smp-sram - amlogic,meson8-smp-sram - amlogic,meson8b-smp-sram - renesas,smp-sram @@ -216,3 +217,27 @@ examples: reg = <0x10080000 0x50>; }; }; + + - | + // Allwinner's A80 SoC uses part of the secure sram for hotplugging of the + // primary core (cpu0). Once the core gets powered up it checks if a magic + // value is set at a specific location. If it is then the BROM will jump + // to the software entry address, instead of executing a standard boot. + // + // Also there are no "secure-only" properties. The implementation should + // check if this SRAM is usable first. + sram@20000 { + // 256 KiB secure SRAM at 0x20000 + compatible = "mmio-sram"; + reg = <0x00020000 0x40000>; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0x00020000 0x40000>; + + smp-sram@1000 { + // This is checked by BROM to determine if + // cpu0 should jump to SMP entry vector + compatible = "allwinner,sun9i-a80-smp-sram"; + reg = <0x1000 0x8>; + }; + };