linux-kernel - [PATCH 1/6] of/base: Add new helper of_should_create

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Message-ID: <20081028174611.GA25349@oksana.dev.rtsoft.ru>
Date:	Tue, 28 Oct 2008 20:46:11 +0300
From:	Anton Vorontsov <avorontsov@...mvista.com>
To:	Grant Likely <grant.likely@...retlab.ca>,
	David Brownell <david-b@...bell.net>
Cc:	benh@...nel.crashing.org, linux-kernel@...r.kernel.org,
	David Miller <davem@...emloft.net>
Subject: [PATCH 1/6] of/base: Add new helper of_should_create_pdev()

This is used to check list of devices for which we should create
a dedicated device.

Signed-off-by: Anton Vorontsov <avorontsov@...mvista.com>
---
 drivers/of/base.c  |   27 +++++++++++++++++++++++++++
 include/linux/of.h |    1 +
 2 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 7c79e94..1baeee3 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -458,6 +458,33 @@ int of_modalias_node(struct device_node *node, char *modalias, int len)
 }
 EXPORT_SYMBOL_GPL(of_modalias_node);
 
+/*
+ * The list of device's compatible entries for which drivers require
+ * platform_data to be filled. For such cases we create OF platform
+ * devices.
+ */
+static const char *of_pdev_list[] = {
+};
+
+/**
+ * of_should_create_pdev - See if a node needs a full-fledged OF device
+ * @node:	pointer to a device tree node
+ *
+ * Based on the value of the compatible property, this routine will determine
+ * if a full-fledged device should be created for a node.
+ */
+bool of_should_create_pdev(struct device_node *node)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(of_pdev_list); i++) {
+		if (!of_device_is_compatible(node, of_pdev_list[i]))
+			return 1;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(of_should_create_pdev);
+
 /**
  * of_parse_phandles_with_args - Find a node pointed by phandle in a list
  * @np:		pointer to a device tree node containing a list
diff --git a/include/linux/of.h b/include/linux/of.h
index e2488f5..d183533 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -71,6 +71,7 @@ extern int of_n_size_cells(struct device_node *np);
 extern const struct of_device_id *of_match_node(
 	const struct of_device_id *matches, const struct device_node *node);
 extern int of_modalias_node(struct device_node *node, char *modalias, int len);
+extern bool of_should_create_pdev(struct device_node *node);
 extern int of_parse_phandles_with_args(struct device_node *np,
 	const char *list_name, const char *cells_name, int index,
 	struct device_node **out_node, const void **out_args);
-- 
1.5.6.3

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