[PATCH 06/15] mtd: nand: define nand_interface_is_sdr

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

To simplify porting kernel NAND drivers a tiny bit, define the
nand_interface_is_sdr() helper.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 include/linux/mtd/rawnand.h | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 0df142098d43..9c8b0a1fe18e 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -519,6 +519,15 @@ struct nand_interface_config {
 	} timings;
 };
 
+/**
+ * nand_interface_is_sdr - get the interface type
+ * @conf:	The data interface
+ */
+static bool nand_interface_is_sdr(const struct nand_interface_config *conf)
+{
+	return conf->type == NAND_SDR_IFACE;
+}
+
 /**
  * nand_get_sdr_timings - get SDR timing from data interface
  * @conf:	The data interface
@@ -526,7 +535,7 @@ struct nand_interface_config {
 static inline const struct nand_sdr_timings *
 nand_get_sdr_timings(const struct nand_interface_config *conf)
 {
-	if (conf->type != NAND_SDR_IFACE)
+	if (!nand_interface_is_sdr(conf))
 		return ERR_PTR(-EINVAL);
 
 	return &conf->timings.sdr;
-- 
2.30.2