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>
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 @@
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.
*
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 5570972..32f03cc 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -426,9 +426,8 @@
* @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.
*/
-static int fdtdec_decode_gpios(const void *blob, int node,
- const char *prop_name, struct fdt_gpio_state *gpio,
- int max_count)
+int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
+ struct fdt_gpio_state *gpio, int max_count)
{
const struct fdt_property *prop;
const u32 *cell;