From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Uz5tg-0005gt-VP for barebox@lists.infradead.org; Tue, 16 Jul 2013 14:06:36 +0000 From: Sascha Hauer Date: Tue, 16 Jul 2013 16:05:58 +0200 Message-Id: <1373983566-27721-3-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1373983566-27721-1-git-send-email-s.hauer@pengutronix.de> References: <1373983566-27721-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 02/10] of: Add convenience functions to en/disable devicenodes To: barebox@lists.infradead.org These functions allow to manipulate the "status" property of devicenodes effectively enabling/disabling devices. Signed-off-by: Sascha Hauer --- drivers/of/base.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/of.h | 5 +++++ 2 files changed, 70 insertions(+) diff --git a/drivers/of/base.c b/drivers/of/base.c index 7bee912..9559bff 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -1752,3 +1752,68 @@ int of_add_initrd(struct device_node *root, resource_size_t start, return 0; } + +/** + * of_device_enable - enable a devicenode device + * @node - the node to enable + * + * This deletes the status property of a devicenode effectively + * enabling the device. + */ +int of_device_enable(struct device_node *node) +{ + struct property *pp; + + pp = of_find_property(node, "status", NULL); + if (!pp) + return 0; + + of_delete_property(pp); + + return 0; +} + +/** + * of_device_enable_path - enable a devicenode + * @path - the nodepath to enable + * + * wrapper around of_device_enable taking the nodepath as argument + */ +int of_device_enable_path(const char *path) +{ + struct device_node *node; + + node = of_find_node_by_path(path); + if (!node) + return -ENODEV; + + return of_device_enable(node); +} + +/** + * of_device_enable - disable a devicenode device + * @node - the node to disable + * + * This sets the status of a devicenode to "disabled" + */ +int of_device_disable(struct device_node *node) +{ + return of_set_property(node, "status", "disabled", sizeof("disabled"), 1); +} + +/** + * of_device_disable_path - disable a devicenode + * @path - the nodepath to disable + * + * wrapper around of_device_disable taking the nodepath as argument + */ +int of_device_disable_path(const char *path) +{ + struct device_node *node; + + node = of_find_node_by_path(path); + if (!node) + return -ENODEV; + + return of_device_disable(node); +} diff --git a/include/of.h b/include/of.h index 710383c..7b600f0 100644 --- a/include/of.h +++ b/include/of.h @@ -682,4 +682,9 @@ static inline int of_property_write_u64(struct device_node *np, extern const struct of_device_id of_default_bus_match_table[]; +int of_device_enable(struct device_node *node); +int of_device_enable_path(const char *path); +int of_device_disable(struct device_node *node); +int of_device_disable_path(const char *path); + #endif /* __OF_H */ -- 1.8.3.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox