From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932351AbaFPTkx (ORCPT ); Mon, 16 Jun 2014 15:40:53 -0400 Received: from mail-ig0-f182.google.com ([209.85.213.182]:56092 "EHLO mail-ig0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755815AbaFPTjb (ORCPT ); Mon, 16 Jun 2014 15:39:31 -0400 From: Alex Elder To: mporter@linaro.org, bcm@fixthebug.org, linux@arm.linux.org.uk, devicetree@vger.kernel.org, arnd@arndb.de, sboyd@codeaurora.org Cc: bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 1/5] devicetree: bindings: document Broadcom CPU enable method Date: Mon, 16 Jun 2014 14:39:43 -0500 Message-Id: <1402947587-13898-2-git-send-email-elder@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1402947587-13898-1-git-send-email-elder@linaro.org> References: <1402947587-13898-1-git-send-email-elder@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Broadcom mobile SoCs use a ROM-implemented holding pen for controlled boot of secondary cores. A special register is used to communicate to the ROM that a secondary core should start executing kernel code. This enable method is currently used for members of the bcm281xx and bcm21664 SoC families. The use of an enable method also allows the SMP operation vector to be assigned as a result of device tree content for these SoCs. Signed-off-by: Alex Elder --- Documentation/devicetree/bindings/arm/cpus.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt index 1fe72a0..cdca080 100644 --- a/Documentation/devicetree/bindings/arm/cpus.txt +++ b/Documentation/devicetree/bindings/arm/cpus.txt @@ -184,6 +184,7 @@ nodes to be present and contain the properties described below. can be one of: "allwinner,sun6i-a31" "arm,psci" + "brcm,bcm11351-cpu-method" "marvell,armada-375-smp" "marvell,armada-380-smp" "marvell,armada-xp-smp" @@ -215,6 +216,17 @@ nodes to be present and contain the properties described below. Value type: Definition: Specifies the ACC[2] node associated with this CPU. + - secondary-boot-reg + Usage: + Required for systems that have an "enable-method" + property value of "brcm,bcm11351-cpu-method". + Value type: + Definition: + Specifies the physical address of the register used to + request the ROM holding pen code release a secondary + CPU. The value written to the register is formed by + encoding the target CPU id into the low bits of the + physical start address it should jump to. Example 1 (dual-cluster big.LITTLE system 32-bit): -- 1.9.1