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authorAbhilash Kesavan <a.kesavan@samsung.com>2012-10-25 16:31:01 +0000
committerGerald Van Baren <gvb@unssw.com>2012-11-12 23:00:35 -0500
commit5921f6a2924827548caf55b28a6827b9d856e37f (patch)
treeee9940600b7daaf68683aaae8c0199c02d3a3c8a /include/fdtdec.h
parentf20c461984c3d986fde037d4c5bf600aa0497676 (diff)
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fdt: Add function for decoding multiple gpios globally available
Samsung's SDHCI bindings require multiple gpios to be parsed and configured at a time. Export the already available fdtdec_decode_gpios for this purpose. Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> Commit-Ready: Che-Liang Chiou <clchiou@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/fdtdec.h')
-rw-r--r--include/fdtdec.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 341e6a1..e70714b 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -345,6 +345,22 @@ int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
struct fdt_gpio_state *gpio);
/**
+ * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
+ * terminating item.
+ *
+ * @param blob FDT blob to use
+ * @param node Node to look at
+ * @param prop_name Node property name
+ * @param gpio Array of gpio elements to fill from FDT. This will be
+ * untouched if either 0 or an error is returned
+ * @param max_count Maximum number of elements allowed
+ * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
+ * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
+ */
+int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
+ struct fdt_gpio_state *gpio, int max_count);
+
+/**
* Set up a GPIO pin according to the provided gpio information. At present this
* just requests the GPIO.
*