On 9/1/2011 8:38 PM, Hilman, Kevin wrote:
Benoit Cousson<b-cousson@xxxxxx> writes:
Add two helpers function to parse a property that contains multiple
strings.
These functions might be exported and moved to a common place if they
can to be useful elsewhere.
Signed-off-by: Benoit Cousson<b-cousson@xxxxxx>
Cc: Kevin Hilman<khilman@xxxxxx>
These should just be folded into 3/3 where they are used (with a comment
changelog of course.)
I did that because I was hoping to generalize them or to remove them if
something better become available in DT core. And it seems that Stephen
Warren from nvidia introduced a generic iterator for properties:
http://www.spinics.net/lists/arm-kernel/msg138013.html
But since it is not in mainline or even in devicetree/test, I still have
to add mine for the moment.
Regards,
Benoit
Kevin
---
arch/arm/plat-omap/omap_device.c | 39 ++++++++++++++++++++++++++++++++++++++
1 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index 752d72a..70361f8 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -315,6 +315,45 @@ static void _add_hwmod_clocks_clkdev(struct omap_device *od,
_add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk);
}
+/*
+ * XXX: DT helper functions that should probably move elsewhere if
+ * they become usefull for other needs.
+ */
+static int _dt_count_property_string(const char *prop, int len)
+{
+ int i = 0;
+ size_t l = 0, total = 0;
+
+ if (!prop || !len)
+ return -EINVAL;
+
+ for (i = 0; len>= total; total += l, prop += l) {
+ l = strlen(prop) + 1;
+ if (*prop != 0)
+ i++;
+ }
+ return i;
+}
+
+static int _dt_get_property(const char *prop, int len, int index, char *output,
+ int size)
+{
+ int i = 0;
+ size_t l = 0, total = 0;
+
+ if (!prop || !len)
+ return -EINVAL;
+
+ for (i = 0; len>= total; total += l, prop += l) {
+ l = strlcpy(output, prop, size) + 1;
+ if (*prop != 0) {
+ if (i++ == index)
+ return 0;
+ }
+ }
+ return -ENODEV;
+}
+
/* Public functions for use by core code */
--
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