From patchwork Mon Feb 8 22:21:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Enrico Weigelt, metux IT consult" X-Patchwork-Id: 1437974 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DZLFh5Vswz9sS8 for ; Tue, 9 Feb 2021 09:25:44 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231576AbhBHWZU (ORCPT ); Mon, 8 Feb 2021 17:25:20 -0500 Received: from mout.kundenserver.de ([212.227.17.24]:45149 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231473AbhBHWZD (ORCPT ); Mon, 8 Feb 2021 17:25:03 -0500 Received: from orion.localdomain ([95.115.15.83]) by mrelayeu.kundenserver.de (mreue107 [212.227.15.183]) with ESMTPSA (Nemesis) id 1MYe6H-1lMjTA0aKB-00VdwQ; Mon, 08 Feb 2021 23:22:15 +0100 From: "Enrico Weigelt, metux IT consult" To: linux-kernel@vger.kernel.org Cc: rafael@kernel.org, info@metux.net, linus.walleij@linaro.org, bgolaszewski@baylibre.com, robh+dt@kernel.org, frowand.list@gmail.com, pantelis.antoniou@konsulko.com, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org Subject: [RFC PATCH 06/12] of: kobj: introduce of_attach_tree_sysfs() Date: Mon, 8 Feb 2021 23:21:57 +0100 Message-Id: <20210208222203.22335-7-info@metux.net> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20210208222203.22335-1-info@metux.net> References: <20210208222203.22335-1-info@metux.net> X-Provags-ID: V03:K1:ZtGzokklzdJEAZwPGATmrH1/M0zLFv6KzHuwBPz7+oXxl4Nxg1b T2WWlO6QkPZXpRM1Fek92mrgiTDDi1HM4UyPU3mKz4QBO9Pec9Z03+jXoat9A4OWPnc+qTZ GQpY0FB294LDM9mM68UB1WcUCHpIcSU5rAjnAwx6EpgOFzSD7ZA882En9rcIIDkIyV1dY9P ZiFJ84GVJGUmb+x3Lzg9w== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:nx2Q60Qwd9I=:b8Ucwi6B5pI52GcH8caQh8 L+DLzZZ6WY7Cu3cRAtHCxlhyENquB3BP1CIlxK9wyXd9Nf4VDBAPh4PwWKGzi+f3sZETCWcCZ LqjFZbz4XF2mUhd08TojxNMy2qS2pjezRtcn4hTEz6uAlKATI1c5/4K+bD3qZ8MclX+2EnQSG ki69/8FFFb/IZnyYP+2Ke1opL6gBtGV9wXHifv+eob+31L/66TAVVl1ORHtQFFArNoToPfFV4 DuB1bSWhI/keD7yDi/wv6SYWhNjWYzU+uQPehAnq86ALhihBIs0Nmu738nu2KXpjVGF5PczLf kHq75BLEfUNsZ2iPTHrItQBAqh8flYDq6bRX/NgYtQbGdlCK0LCQw9HBHkVyfnCr30w4A3Sjv vWY6d0iwGvCr0kXEuSxvN0sEAOVRco5IpDWW4YN3wmKz37QevT9uy/rP3r5To Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Introduce helper for attaching an (separate) oftree into sysfs. This is useful, when drivers use their own internal device trees, separate from the platform's global one, and wanna make it visible to userspace via sysfs. Signed-off-by: Enrico Weigelt, metux IT consult --- drivers/of/kobj.c | 17 +++++++++++++++++ include/linux/of.h | 7 +++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/of/kobj.c b/drivers/of/kobj.c index 511d7e8b9068..96dc5a2753f4 100644 --- a/drivers/of/kobj.c +++ b/drivers/of/kobj.c @@ -166,3 +166,20 @@ void __of_detach_node_sysfs(struct device_node *np) of_node_put(np); } + +void of_attach_tree_sysfs(struct device_node *root, const char* base) +{ + struct device_node *np; + + if (!root) + return; + + /* need to from our parent, so we don't traverse above our root, + * if it's actually a subtree */ + root->parent = NULL; + + __of_attach_node_sysfs(root, base); + for_each_of_allnodes_from(root, np) + __of_attach_node_sysfs(np, base); +} +EXPORT_SYMBOL_GPL(of_attach_tree_sysfs); diff --git a/include/linux/of.h b/include/linux/of.h index 3612429632f4..c2fb12ce07f9 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -421,6 +421,8 @@ extern int of_update_property(struct device_node *np, struct property *newprop); extern int of_attach_node(struct device_node *); extern int of_detach_node(struct device_node *); +extern void of_attach_tree_sysfs(struct device_node *root, const char* base); + #define of_match_ptr(_ptr) (_ptr) /** @@ -1010,6 +1012,11 @@ static inline phys_addr_t of_dma_get_max_cpu_address(struct device_node *np) return PHYS_ADDR_MAX; } +static inline void of_attach_tree_sysfs(struct device_node *root, + const char* base) +{ +} + #define of_match_ptr(_ptr) NULL #define of_match_node(_matches, _node) NULL #endif /* CONFIG_OF */