[PATCH 5.10 458/545] mtd: rawnand: Add a helper to clarify the interface configuration

[Greg Kroah-Hartman]

From: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>

[ Upstream commit 961965c45c706175b24227868b1c12d72775e446 ]

Name it nand_interface_is_sdr() which will make even more sense when
nand_interface_is_nvddr() will be introduced.

Use it when relevant.

Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/20210505213750.257417-2-miquel.raynal@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/mtd/nand/raw/atmel/nand-controller.c |  2 +-
 include/linux/mtd/rawnand.h                  | 11 ++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index c048e826746a..2228c34f3dea 100644
--- a/drivers/mtd/nand/raw/atmel/nand-controller.c
+++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
@@ -1246,7 +1246,7 @@ static int atmel_smc_nand_prepare_smcconf(struct atmel_nand *nand,
 	nc = to_nand_controller(nand->base.controller);
 
 	/* DDR interface not supported. */
-	if (conf->type != NAND_SDR_IFACE)
+	if (!nand_interface_is_sdr(conf))
 		return -ENOTSUPP;
 
 	/*
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index db2eaff77f41..75535036b126 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -499,6 +499,15 @@ 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
@@ -506,7 +515,7 @@ 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;
-- 
2.35.1