From: Rahul Singh <rahul.singh@arm.com>
To: xen-devel@lists.xenproject.org
Cc: bertrand.marquis@arm.com, rahul.singh@arm.com,
Stefano Stabellini <sstabellini@kernel.org>,
Julien Grall <julien@xen.org>
Subject: [PATCH v5 06/10] xen/device-tree: Add dt_property_match_string helper
Date: Wed, 20 Jan 2021 14:52:40 +0000 [thread overview]
Message-ID: <720eb04dcd2a2c8b9d7d8c96b0064af4465ca207.1611153615.git.rahul.singh@arm.com> (raw)
In-Reply-To: <cover.1611153615.git.rahul.singh@arm.com>
In-Reply-To: <cover.1611153615.git.rahul.singh@arm.com>
Import the Linux helper of_property_match_string. This function searches
a string list property and returns the index of a specific string value.
Signed-off-by: Rahul Singh <rahul.singh@arm.com>
Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---
Changes since v2:
- This patch is introduce in this verison.
Changes since v3: No changes
Changes since v4: No changes
---
---
xen/common/device_tree.c | 27 +++++++++++++++++++++++++++
xen/include/xen/device_tree.h | 12 ++++++++++++
2 files changed, 39 insertions(+)
diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c
index e107c6f89f..18825e333e 100644
--- a/xen/common/device_tree.c
+++ b/xen/common/device_tree.c
@@ -208,6 +208,33 @@ int dt_property_read_string(const struct dt_device_node *np,
return 0;
}
+int dt_property_match_string(const struct dt_device_node *np,
+ const char *propname, const char *string)
+{
+ const struct dt_property *dtprop = dt_find_property(np, propname, NULL);
+ size_t l;
+ int i;
+ const char *p, *end;
+
+ if ( !dtprop )
+ return -EINVAL;
+ if ( !dtprop->value )
+ return -ENODATA;
+
+ p = dtprop->value;
+ end = p + dtprop->length;
+
+ for ( i = 0; p < end; i++, p += l )
+ {
+ l = strnlen(p, end - p) + 1;
+ if ( p + l > end )
+ return -EILSEQ;
+ if ( strcmp(string, p) == 0 )
+ return i; /* Found it; return index */
+ }
+ return -ENODATA;
+}
+
bool_t dt_device_is_compatible(const struct dt_device_node *device,
const char *compat)
{
diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h
index f2ad22b79c..b02696be94 100644
--- a/xen/include/xen/device_tree.h
+++ b/xen/include/xen/device_tree.h
@@ -400,6 +400,18 @@ static inline bool_t dt_property_read_bool(const struct dt_device_node *np,
int dt_property_read_string(const struct dt_device_node *np,
const char *propname, const char **out_string);
+/**
+ * dt_property_match_string() - Find string in a list and return index
+ * @np: pointer to node containing string list property
+ * @propname: string list property name
+ * @string: pointer to string to search for in string list
+ *
+ * This function searches a string list property and returns the index
+ * of a specific string value.
+ */
+int dt_property_match_string(const struct dt_device_node *np,
+ const char *propname, const char *string);
+
/**
* Checks if the given "compat" string matches one of the strings in
* the device's "compatible" property
--
2.17.1
next prev parent reply other threads:[~2021-01-20 14:57 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 14:52 [PATCH v5 00/10] xen/arm: Add support for SMMUv3 driver Rahul Singh
2021-01-20 14:52 ` [PATCH v5 01/10] xen/arm: smmuv3: Import the SMMUv3 driver from Linux Rahul Singh
2021-01-20 14:52 ` [PATCH v5 02/10] xen/arm: Revert atomic operation related command-queue insertion patch Rahul Singh
2021-01-20 14:52 ` [PATCH v5 03/10] xen/arm: smmuv3: Revert patch related to XArray Rahul Singh
2021-01-20 14:52 ` [PATCH v5 04/10] xen/arm: smmuv3: Remove support for Stage-1 translation on SMMUv3 Rahul Singh
2021-01-20 14:52 ` [PATCH v5 05/10] xen/arm: smmuv3: Remove Linux specific code that is not usable in XEN Rahul Singh
2021-01-20 14:52 ` Rahul Singh [this message]
2021-01-20 14:52 ` [PATCH v5 07/10] xen/compiler: import 'fallthrough' keyword from linux Rahul Singh
2021-01-20 14:52 ` [PATCH v5 08/10] xen/arm: smmuv3: Use fallthrough pseudo-keyword Rahul Singh
2021-01-20 15:36 ` Bertrand Marquis
2021-01-20 19:56 ` Stefano Stabellini
2021-01-20 14:52 ` [PATCH v5 09/10] xen/arm: smmuv3: Replace linux functions with xen functions Rahul Singh
2021-01-20 14:52 ` [PATCH v5 10/10] xen/arm: smmuv3: Add support for SMMUv3 driver Rahul Singh
2021-01-20 15:35 ` Bertrand Marquis
2021-01-20 20:31 ` Stefano Stabellini
2021-01-21 17:10 ` Rahul Singh
2021-01-21 18:43 ` Julien Grall
2021-01-21 20:28 ` Rahul Singh
2021-01-21 21:20 ` Stefano Stabellini
2021-01-20 21:33 ` Oleksandr
2021-01-21 17:18 ` Rahul Singh
2021-01-21 18:31 ` Julien Grall
2021-01-21 18:50 ` Rahul Singh
2021-01-21 20:19 ` Julien Grall
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