From patchwork Mon Jan 20 15:42:58 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 312628 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 6033B2C0040 for ; Tue, 21 Jan 2014 02:43:38 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753973AbaATPng (ORCPT ); Mon, 20 Jan 2014 10:43:36 -0500 Received: from gloria.sntech.de ([95.129.55.99]:36577 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752035AbaATPnd (ORCPT ); Mon, 20 Jan 2014 10:43:33 -0500 Received: from ip545477c2.speed.planet.nl ([84.84.119.194] helo=phil.localnet) by gloria.sntech.de with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.80) (envelope-from ) id 1W5H0Y-0002Ez-W6; Mon, 20 Jan 2014 16:43:27 +0100 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: "linux-arm-kernel@lists.infradead.org" Cc: arm@kernel.org, Grant Likely , Rob Herring , devicetree@vger.kernel.org, Philipp Zabel , linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Pawel Moll , Mark Rutland , Stephen Warren , Ian Campbell Subject: [PATCH v7 2/7] dt-bindings: sram: describe option to reserve parts of the memory Date: Mon, 20 Jan 2014 16:42:58 +0100 Message-ID: <1782709.QdZpsrsctf@phil> User-Agent: KMail/4.11.3 (Linux/3.11-2-amd64; KDE/4.11.3; x86_64; ; ) In-Reply-To: <4970034.fqvMoHdOyd@phil> References: <4970034.fqvMoHdOyd@phil> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Some SoCs need parts of their sram for special purposes. So while being part of the peripheral, it should not be part of the genpool controlling the sram. Therefore add an option mmio-sram-reserved to keep arbitrary portions of the sram from general usage. Suggested-by: Rob Herring Signed-off-by: Heiko Stuebner Tested-by: Ulrich Prinz Acked-by: Rob Herring --- Documentation/devicetree/bindings/misc/sram.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/misc/sram.txt b/Documentation/devicetree/bindings/misc/sram.txt index 4d0a00e..09ee7a3 100644 --- a/Documentation/devicetree/bindings/misc/sram.txt +++ b/Documentation/devicetree/bindings/misc/sram.txt @@ -8,9 +8,17 @@ Required properties: - reg : SRAM iomem address range +Optional properties: + +- mmio-sram-reserved: ordered list of reserved chunks inside the sram that + should not be used by the operating system. + Format is , , ...; with base being relative to the + reg property base. + Example: sram: sram@5c000000 { compatible = "mmio-sram"; reg = <0x5c000000 0x40000>; /* 256 KiB SRAM at address 0x5c000000 */ + mmio-sram-reserved = <0x0 0x100>; /* reserve 0x5c000000-0x5c000100 */ };