From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759719Ab2D0D1A (ORCPT ); Thu, 26 Apr 2012 23:27:00 -0400 Received: from am1ehsobe002.messaging.microsoft.com ([213.199.154.205]:9129 "EHLO am1outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759700Ab2D0D0x (ORCPT ); Thu, 26 Apr 2012 23:26:53 -0400 X-SpamScore: 3 X-BigFish: VS3(zzzz1202h1082kzz8275bh8275dhz2dh2a8h668h839hd24he5bh) X-Forefront-Antispam-Report: CIP:70.37.183.190;KIP:(null);UIP:(null);IPV:NLI;H:mail.freescale.net;RD:none;EFVD:NLI From: Dong Aisheng To: CC: , , , , , , , , , , Subject: [PATCH v5 1/1] dt: add of_get_child_count helper function Date: Fri, 27 Apr 2012 11:36:20 +0800 Message-ID: <1335497780-1164-1-git-send-email-b29396@freescale.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <20120427032831.GE26070@shlinux2.ap.freescale.net> References: <20120427032831.GE26070@shlinux2.ap.freescale.net> MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: freescale.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dong Aisheng Currently most code to get child count in kernel are almost same, add a helper to implement this function for dt to use. Cc: Grant Likely Acked-by: Rob Herring Signed-off-by: Dong Aisheng --- Rob missed this patch for 3.4 kernel. Based on Rob's suggestion, we can get it go in with pinctrl driver. Since Rob once had applied it, i added Rob's ack. See: https://lkml.org/lkml/2012/4/14/239 changes v4->v5: * do not initialize child node pointer based on Stephen's suggestion. changes v3->v4: * addressed Grant's suggestion to use for_each_child_of_node. changes v2->v3: Addressed some people's comments: * do not use assignment as expression * return 0 for non-dt case Changes v1->v2: * change the name from of_get_child_number to of_get_child_count --- include/linux/of.h | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) diff --git a/include/linux/of.h b/include/linux/of.h index e3f942d..2ec1083 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -193,6 +193,17 @@ extern struct device_node *of_get_next_child(const struct device_node *node, for (child = of_get_next_child(parent, NULL); child != NULL; \ child = of_get_next_child(parent, child)) +static inline int of_get_child_count(const struct device_node *np) +{ + struct device_node *child; + int num = 0; + + for_each_child_of_node(np, child) + num++; + + return num; +} + extern struct device_node *of_find_node_with_property( struct device_node *from, const char *prop_name); #define for_each_node_with_property(dn, prop_name) \ @@ -300,6 +311,11 @@ static inline bool of_have_populated_dt(void) #define for_each_child_of_node(parent, child) \ while (0) +static inline int of_get_child_count(const struct device_node *np) +{ + return 0; +} + static inline int of_device_is_compatible(const struct device_node *device, const char *name) { -- 1.7.0.4