From patchwork Tue Jun 19 19:15:00 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 165850 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id BB0D0B700B for ; Wed, 20 Jun 2012 07:13:48 +1000 (EST) Received: from localhost ([::1]:43011 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sh3ub-0003HJ-B0 for incoming@patchwork.ozlabs.org; Tue, 19 Jun 2012 15:16:25 -0400 Received: from eggs.gnu.org ([208.118.235.92]:55644) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sh3tn-0001YB-KL for qemu-devel@nongnu.org; Tue, 19 Jun 2012 15:15:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Sh3ti-0004bk-To for qemu-devel@nongnu.org; Tue, 19 Jun 2012 15:15:35 -0400 Received: from cantor2.suse.de ([195.135.220.15]:48194 helo=mx2.suse.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sh3ti-0004aF-OF; Tue, 19 Jun 2012 15:15:30 -0400 Received: from relay2.suse.de (unknown [195.135.220.254]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx2.suse.de (Postfix) with ESMTP id 0E3C1A4A7C; Tue, 19 Jun 2012 21:15:29 +0200 (CEST) From: Alexander Graf To: qemu-devel qemu-devel Date: Tue, 19 Jun 2012 21:15:00 +0200 Message-Id: <1340133324-352-8-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1340133324-352-1-git-send-email-agraf@suse.de> References: <1340133324-352-1-git-send-email-agraf@suse.de> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4-2.6 X-Received-From: 195.135.220.15 Cc: qemu-ppc Mailing List Subject: [Qemu-devel] [PATCH 07/31] dt: add helper for phandle allocation X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Phandle references work by having 2 pieces: - a "phandle" 1-cell property in the device tree node - a reference to the same value in a property we want to point to the other node To generate the 1-cell property, we need an allocation mechanism that gives us a unique number space. This patch adds an allocator for these properties. Signed-off-by: Alexander Graf --- device_tree.c | 7 +++++++ device_tree.h | 1 + 2 files changed, 8 insertions(+), 0 deletions(-) diff --git a/device_tree.c b/device_tree.c index d037896..7541274 100644 --- a/device_tree.c +++ b/device_tree.c @@ -191,6 +191,13 @@ int qemu_devtree_setprop_phandle(void *fdt, const char *node_path, return qemu_devtree_setprop_cell(fdt, node_path, property, phandle); } +uint32_t qemu_devtree_alloc_phandle(void *fdt) +{ + static int phandle = 0x8000; + + return phandle++; +} + int qemu_devtree_nop_node(void *fdt, const char *node_path) { int r; diff --git a/device_tree.h b/device_tree.h index 5f76f40..97af345 100644 --- a/device_tree.h +++ b/device_tree.h @@ -27,6 +27,7 @@ int qemu_devtree_setprop_phandle(void *fdt, const char *node_path, const char *property, const char *target_node_path); uint32_t qemu_devtree_get_phandle(void *fdt, const char *path); +uint32_t qemu_devtree_alloc_phandle(void *fdt); int qemu_devtree_nop_node(void *fdt, const char *node_path); int qemu_devtree_add_subnode(void *fdt, const char *name);