From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: [PATCH RFC 4/7] xen: arm: add two new device tree helpers Date: Tue, 17 Sep 2013 02:40:47 +0100 Message-ID: <1379382050-11821-4-git-send-email-ian.campbell@citrix.com> References: <1379381846.11304.73.camel@hastur.hellion.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1379381846.11304.73.camel@hastur.hellion.org.uk> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: julien.grall@citrix.com, tim@xen.org, Ian Campbell , stefano.stabellini@eu.citrix.com List-Id: xen-devel@lists.xenproject.org - dt_property_read_u64 - dt_find_node_by_type Signed-off-by: Ian Campbell --- xen/common/device_tree.c | 29 +++++++++++++++++++++++++++++ xen/include/xen/device_tree.h | 16 ++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index 3a3c99c..74a82bc 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -589,6 +589,21 @@ bool_t dt_property_read_u32(const struct dt_device_node *np, return 1; } +bool_t dt_property_read_u64(const struct dt_device_node *np, + const char *name, u64 *out_value) +{ + u32 len; + const __be32 *val; + + val = dt_get_property(np, name, &len); + if ( !val || len < sizeof(*out_value) ) + return 0; + + *out_value = dt_read_number(val, 2); + + return 1; +} + bool_t dt_device_is_compatible(const struct dt_device_node *device, const char *compat) { @@ -637,6 +652,20 @@ struct dt_device_node *dt_find_node_by_name(struct dt_device_node *from, return np; } +struct dt_device_node *dt_find_node_by_type(struct dt_device_node *from, + const char *type) +{ + struct dt_device_node *np; + struct dt_device_node *dt; + + dt = from ? from->allnext : dt_host; + for_each_device_node(dt, np) + if ( np->type && (dt_node_cmp(np->type, type) == 0) ) + break; + + return np; +} + struct dt_device_node *dt_find_node_by_path(const char *path) { struct dt_device_node *np; diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h index 402cef2..3aa8452 100644 --- a/xen/include/xen/device_tree.h +++ b/xen/include/xen/device_tree.h @@ -315,6 +315,16 @@ const void *dt_get_property(const struct dt_device_node *np, */ bool_t dt_property_read_u32(const struct dt_device_node *np, const char *name, u32 *out_value); +/** + * dt_property_read_u64 - Helper to read a u64 property. + * @np: node to get the value + * @name: name of the property + * @out_value: pointer to return value + * + * Return true if get the desired value. + */ +bool_t dt_property_read_u64(const struct dt_device_node *np, + const char *name, u64 *out_value); /** * Checks if the given "compat" string matches one of the strings in @@ -347,6 +357,12 @@ struct dt_device_node *dt_find_node_by_name(struct dt_device_node *node, const char *name); /** + * dt_find_node_by_name - Find a node by its "name" property + */ +struct dt_device_node *dt_find_node_by_type(struct dt_device_node *from, + const char *type); + +/** * df_find_node_by_alias - Find a node matching an alias * @alias: The alias to match * -- 1.8.3.2